ࡱ>   !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~  !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~#܈ ~~4#܈ ~~3#܈ ~~83ffff̙̙3f3fff3f3f33333f33ɐ SECURITIES AND EXC&RCALCULATION OF REGISTRATION FEEۍTO BE HELD ON 2001|TABLE OF CONTENTS.PAGE 78; LIST OF APPENDICES&LIMITED PARTNER INVESTMENT REPA&zLIMITED PARTNER INVESTMENT (1)% 5 PAGE 15 NYMEX FUTURES PRICES&EXAMPLE CALCULATION OF MERGER V+Income StatementIncome Statement (1)OAT DECEMBER 31 2000&$15 PAGE 25 COMPARATIVE PER SHAR&X25 PAGE 35 REASONS FOR THE MERGFAIRNESS OPINIONZ FAIRNESS OPINION (1)&? LEGAL OPINION FOR LIMITED PARTN&Z LEGAL OPINION FOR LIMITED P (1)& NONMANAGING GENERAL PARTNERS OF&t[ 49 PAGE 59 PAYMENT OF EXPENSES &o 58 PAGE 68 COMPARATIVE PER SHAR&N[ 60 PAGE 70 OWNERSHIP OF PARTNER" PIONEER Y PIONEER USA THE DRILLING PARTNERSHIPS$~aTHE DRILLING PARTNERSHIPS (1)THE INCOME PARTNERSHIPS\ INTERESTSINTERESTS (1){INTERESTS (2)INTERESTS (3)INTERESTS (4)5INTERESTS (5)&WHERE YOU CAN FIND MORE INFORMAEAS OF DECEMBER 31 2000"eYEAR ENDED DECEMBER 31 2000&cQUANTITIES OF OIL AND GAS RESER&@STANDARDIZED MEASURE OF DISCOUNk CASH FLOWSEAS OF MARCH 31 2001AS OF MARCH 31 2001 (1)*AS OF MARCH 31 2001 (2)JAS OF MARCH 31 2001 (3)?AS OF MARCH 31 2001 (4) AS OF MARCH 31 2001 (5)&)bFROM INCEPTION THROUGH MARCH 31&ANNUAL REPURCHASE PRICES AND AGSOF EACH PARTNERSHIP&<FOR THE THREE MONTHS ENDED MARC!7AS OF DECEMBER 31 2000 (1)AS OF MARCH 31 2001 (6)&THE YEARS ENDED DECEMBER 31 200!umAS OF DECEMBER 31 2000 (2) DECEMBER 31 2000 AND 1999!EFFECTIVE DECEMBER 31 2000%@ EFFECTIVE DECEMBER 31 2000 (1) RECITALSW! RECITALS (1)%!SUPPLEMENTAL INFORMATION TABLEOZ"Balance Sheet6"Income Statement (2)%d#STATEMENTS OF PARTNERS CAPITAL#Cash Flows (1) o$NOTE 4 INCOME TAXES&$ NOTE 5 OIL AND GAS PRODUCING A&:m% NOTE 5 OIL AND GAS PRODUCI (1)&% NOTE 6 RELATED PARTY TRANSACTI&Vk& NOTE 6 RELATED PARTY TRANS (1)&& NOTE 7 OIL AND GAS INFORMATION&l' NOTE 7 OIL AND GAS INFORMA (1)&' NOTE 7 OIL AND GAS INFORMA (2)&eq(11 PAGE 163 NOTE 8 MAJOR CUSTOM(SELECTED FINANCIAL DATA%.{)SUPPLEMENTAL INFORMATION T (1))Balance Sheet (1)‚*Income Statement (3)%O+STATEMENTS OF PARTNERS CAP (1)+Cash Flows (2),NOTE 4 INCOME TAXES (1)&, NOTE 5 OIL AND GAS PRODUCI (2)&- NOTE 5 OIL AND GAS PRODUCI (3)&o- 9 PAGE 180 NOTE 6 RELATED PAR&. 9 PAGE 180 NOTE 6 RELATED (1)&. NOTE 7 OIL AND GAS INFORMA (3)&/ NOTE 7 OIL AND GAS INFORMA (4)&/ NOTE 7 OIL AND GAS INFORMA (5)&7011 PAGE 182 NOTE 8 MAJOR CUSTOM"D0SELECTED FINANCIAL DATA (1)%?#1SUPPLEMENTAL INFORMATION T (2)%1ITEM 6 SELECTED FINANCIAL DATA$-2INDEX TO FINANCIAL STATEMENTS:2Balance Sheet (2)c23Income Statement (4)%3STATEMENTS OF PARTNERS CAP (2);4Cash Flows (3)&415 PAGE 205 NOTE 4 INCOME TAXES&C5 NOTE 5 OIL AND GAS PRODUCI (4)&l5 NOTE 5 OIL AND GAS PRODUCI (5)&?6 NOTE 6 RELATED PARTY TRANS (2)&6 NOTE 6 RELATED PARTY TRANS (3)&a=7 NOTE 7 OIL AND GAS INFORMA (6)&r7 NOTE 7 OIL AND GAS INFORMA (7)&n:8 NOTE 7 OIL AND GAS INFORMA (8)&48 NOTE 7 OIL AND GAS INFORMA (9)&79 NOTE 7 OIL AND GAS INFORM (10)&9 18 PAGE 208 NOTE 8 MAJOR CUSTO&9:ITEM 10 DIRECTORS AND EXECUTIVE:Beneficial Ownership9;PARKER PARSLEY 82I LTD;INDEX TO EXHIBITS"?<SELECTED FINANCIAL DATA (2)%<SUPPLEMENTAL INFORMATION T (3)%)M=ITEM 6 SELECTED FINANCIAL (1)$A=INDEX TO FINANCIAL STATEM (1)T>Balance Sheet (3)>Income Statement (5)%_?STATEMENTS OF PARTNERS CAP (3)?Cash Flows (4)i@NOTE 4 INCOME TAXES (2)&@ NOTE 5 OIL AND GAS PRODUCI (6)&gA NOTE 5 OIL AND GAS PRODUCI (7)&>A 16 PAGE 236 NOTE 6 RELATED PAR&eB 16 PAGE 236 NOTE 6 RELATED (1)&B NOTE 7 OIL AND GAS INFORM (11)&fC NOTE 7 OIL AND GAS INFORM (12)&*C NOTE 7 OIL AND GAS INFORM (13)&{kD18 PAGE 238 NOTE 8 MAJOR CUSTOM&@DITEM 10 DIRECTORS AND EXECU (1)jEBeneficial Ownership (1)EPARKER PARSLEY 82II LTDkFINDEX TO EXHIBITS (1)"FSELECTED FINANCIAL DATA (3)%zGSUPPLEMENTAL INFORMATION T (4)GBalance Sheet (4)JHIncome Statement (6)%ISTATEMENTS OF PARTNERS CAP (4)ICash Flows (5)nJNOTE 4 INCOME TAXES (3)&.J NOTE 5 OIL AND GAS PRODUCI (8)&K NOTE 5 OIL AND GAS PRODUCI (9)&K 9 PAGE 259 NOTE 6 RELATED PART&L 9 PAGE 259 NOTE 6 RELATED (1)&WL NOTE 7 OIL AND GAS INFORM (14)&|M NOTE 7 OIL AND GAS INFORM (15)&)M NOTE 7 OIL AND GAS INFORM (16)&N11 PAGE 261 NOTE 8 MAJOR CUSTOM"NSELECTED FINANCIAL DATA (4)%OSUPPLEMENTAL INFORMATION T (5)qOPARKER PARSLEY 83A LTD%PITEM 6 SELECTED FINANCIAL (2)$PINDEX TO FINANCIAL STATEM (2)'QBalance Sheet (5)جQIncome Statement (7)%E2RSTATEMENTS OF PARTNERS CAP (5)RCash Flows (6)XBeneficial Ownership (2)!XPARKER PARSLEY 83A LTD (1)@YINDEX TO EXHIBITS (2)"YSELECTED FINANCIAL DATA (5)%OZSUPPLEMENTAL INFORMATION T (6)ZPARKER PARSLEY 83B LTD%O[ITEM 6 SELECTED FINANCIAL (3)$K[INDEX TO FINANCIAL STATEM (3)X\Balance Sheet (6)K\Income Statement (8)%c]STATEMENTS OF PARTNERS CAP (6)>]Cash Flows (7)[m^NOTE 4 INCOME TAXES (5)&h^ NOTE 5 OIL AND GAS PRODUC (12)&k_ NOTE 5 OIL AND GAS PRODUC (13)&6_ 16 PAGE 315 NOTE 6 RELATED PAR&i` 16 PAGE 315 NOTE 6 RELATED (1)%`NOTE 7 OIL AND GAS INFORMA (3)%^kaNOTE 7 OIL AND GAS INFORMA (4)%aNOTE 7 OIL AND GAS INFORMA (5)&.pb18 PAGE 317 NOTE 8 MAJOR CUSTOM&bITEM 10 DIRECTORS AND EXECU (3)pcBeneficial Ownership (3)!cPARKER PARSLEY 83B LTD (1)qdINDEX TO EXHIBITS (3)"dSELECTED FINANCIAL DATA (6)%eSUPPLEMENTAL INFORMATION T (7)ofPARKER PARSLEY 84A LTD%fITEM 6 SELECTED FINANCIAL (4)$ gINDEX TO FINANCIAL STATEM (4)gBalance Sheet (7)hIncome Statement (9)%hSTATEMENTS OF PARTNERS CAP (7)FiCash Flows (8)&7i15 PAGE 344 NOTE 4 INCOME TAXES&4j NOTE 5 OIL AND GAS PRODUC (14)&pj NOTE 5 OIL AND GAS PRODUC (15)&k 16 PAGE 345 NOTE 6 RELATED PAR&6k 16 PAGE 345 NOTE 6 RELATED (1)%)lNOTE 7 OIL AND GAS INFORMA (6)%ʛlNOTE 7 OIL AND GAS INFORMA (7)% mNOTE 7 OIL AND GAS INFORMA (8)&m18 PAGE 347 NOTE 8 MAJOR CUSTOM&nITEM 10 DIRECTORS AND EXECU (4)nBeneficial Ownership (4)!ooPARKER PARSLEY 84A LTD (1)oINDEX TO EXHIBITS (4)";&pSELECTED FINANCIAL DATA (7)%;pSUPPLEMENTAL INFORMATION T (8)3qPARKER PARSLEY 85A LTD%+qITEM 6 SELECTED FINANCIAL (5)$z:rINDEX TO FINANCIAL STATEM (5)rBalance Sheet (8)>sIncome Statement (10)%sSTATEMENTS OF PARTNERS CAP (8)gGtCash Flows (9)CtNOTE 4 INCOME TAXES (6)&Ou NOTE 5 OIL AND GAS PRODUC (16)&u NOTE 5 OIL AND GAS PRODUC (17)&CLv 16 PAGE 375 NOTE 6 RELATED PAR&v 16 PAGE 375 NOTE 6 RELATED (1)%#JwNOTE 7 OIL AND GAS INFORMA (9)%wNOTE 7 OIL AND GAS INFORM (10)%MxNOTE 7 OIL AND GAS INFORM (11)&gx18 PAGE 377 NOTE 8 MAJOR CUSTOM&NyITEM 10 DIRECTORS AND EXECU (5)uyBeneficial Ownership (5)!NzPARKER PARSLEY 85A LTD (1) zINDEX TO EXHIBITS (5)"=U{SELECTED FINANCIAL DATA (8)%h{SUPPLEMENTAL INFORMATION T (9)b|PARKER PARSLEY 85B LTD%|ITEM 6 SELECTED FINANCIAL (6)&g}7 PAGE 396 ITEM 8 FINANCIAL STA}Balance Sheet (9)%l~STATEMENTS OF PARTNERS CAP (9)~Cash Flows (10)&v15 PAGE 404 NOTE 4 INCOME TAXES& NOTE 5 OIL AND GAS PRODUC (18)&u NOTE 5 OIL AND GAS PRODUC (19)&c 16 PAGE 405 NOTE 6 RELATED PAR&#s 16 PAGE 405 NOTE 6 RELATED (1)%NOTE 7 OIL AND GAS INFORM (12)%OtNOTE 7 OIL AND GAS INFORM (13)%NOTE 7 OIL AND GAS INFORM (14)&x18 PAGE 407 NOTE 8 MAJOR CUSTOM&ITEM 10 DIRECTORS AND EXECU (6)vyBeneficial Ownership (6)!PARKER PARSLEY 85B LTD (1){INDEX TO EXHIBITS (6)"3SELECTED FINANCIAL DATA (9)%kSUPPLEMENTAL INFORMATION (10) Balance Sheet (10)Income Statement (11)%STATEMENTS OF PARTNERS CA (10)Cash Flows (11) "NOTE 4 INCOME TAXES (7)& NOTE 5 OIL AND GAS PRODUC (20)&  NOTE 5 OIL AND GAS PRODUC (21)&{ 9 PAGE 428 NOTE 6 RELATED PART& 9 PAGE 428 NOTE 6 RELATED (1)%ޝNOTE 7 OIL AND GAS INFORM (15)%NOTE 7 OIL AND GAS INFORM (16)%NOTE 7 OIL AND GAS INFORM (17)&^$ 11 PAGE 430 NOTE 8 MAJOR CUSTO#SELECTED FINANCIAL DATA (10)%P,SUPPLEMENTAL INFORMATION (11)Balance Sheet (11)3Income Statement (12)%STATEMENTS OF PARTNERS CA (11)<Cash Flows (12)%LÐ8 PAGE 446 NOTE 4 INCOME TAXES&D NOTE 5 OIL AND GAS PRODUC (22)& NOTE 5 OIL AND GAS PRODUC (23)&@ 9 PAGE 447 NOTE 6 RELATED PART& 9 PAGE 447 NOTE 6 RELATED (1)%?NOTE 7 OIL AND GAS INFORM (18)%NOTE 7 OIL AND GAS INFORM (19)%CNOTE 7 OIL AND GAS INFORM (20)&5ǔ 11 PAGE 449 NOTE 8 MAJOR CUSTO#vFSELECTED FINANCIAL DATA (11)%ѕSUPPLEMENTAL INFORMATION (12)*TPARKER PARSLEY 86A LTD%ҖITEM 6 SELECTED FINANCIAL (7)$ZINDEX TO FINANCIAL STATEM (6)ٗBalance Sheet (12)0_Income Statement (13)%STATEMENTS OF PARTNERS CA (12)gCash Flows (13)<NOTE 4 INCOME TAXES (8)&8p NOTE 5 OIL AND GAS PRODUC (24)& NOTE 5 OIL AND GAS PRODUC (25)&l 16 PAGE 473 NOTE 6 RELATED PAR&n 16 PAGE 473 NOTE 6 RELATED (1)%>kNOTE 7 OIL AND GAS INFORM (21)%NOTE 7 OIL AND GAS INFORM (22)%(nNOTE 7 OIL AND GAS INFORM (23)&18 PAGE 475 NOTE 8 MAJOR CUSTOM&loITEM 10 DIRECTORS AND EXECU (7)Beneficial Ownership (7)!MoPARKER PARSLEY 86A LTD (1)INDEX TO EXHIBITS (7)#vSELECTED FINANCIAL DATA (12)%SUPPLEMENTAL INFORMATION (13)脡PARKER PARSLEY 86B LTD%ITEM 6 SELECTED FINANCIAL (8)$XINDEX TO FINANCIAL STATEM (7) Balance Sheet (13)Income Statement (14)%STATEMENTS OF PARTNERS CA (13)Cash Flows (14)& 16 PAGE 503 NOTE 4 INCOME TAXES& NOTE 5 OIL AND GAS PRODUC (26)& NOTE 5 OIL AND GAS PRODUC (27)& NOTE 6 RELATED PARTY TRANS (4)& NOTE 6 RELATED PARTY TRANS (5)%NOTE 7 OIL AND GAS INFORM (24)%ONOTE 7 OIL AND GAS INFORM (25)%NOTE 7 OIL AND GAS INFORM (26)&"19 PAGE 506 NOTE 8 MAJOR CUSTOM&ITEM 10 DIRECTORS AND EXECU (8)@#Beneficial Ownership (8)!PARKER PARSLEY 86B LTD (1)#INDEX TO EXHIBITS (8)#SELECTED FINANCIAL DATA (13)%U4SUPPLEMENTAL INFORMATION (14)%ضITEM 6 SELECTED FINANCIAL (9)&?7 PAGE 525 ITEM 8 FINANCIAL STAvBalance Sheet (14)DIncome Statement (15)%ʮSTATEMENTS OF PARTNERS CA (14)MCash Flows (15)eԯNOTE 4 INCOME TAXES (9)&U NOTE 5 OIL AND GAS PRODUC (28)&Ӱ NOTE 5 OIL AND GAS PRODUC (29)&R 16 PAGE 534 NOTE 6 RELATED PAR&kѱ 16 PAGE 534 NOTE 6 RELATED (1)%\QNOTE 7 OIL AND GAS INFORM (27)%?ӲNOTE 7 OIL AND GAS INFORM (28)%TNOTE 7 OIL AND GAS INFORM (29)&Mس18 PAGE 536 NOTE 8 MAJOR CUSTOM&VITEM 10 DIRECTORS AND EXECU (9)شBeneficial Ownership (9)'WPARKER PARSLEY 86C LTD#pڵSELECTED FINANCIAL DATA (14)%eSUPPLEMENTAL INFORMATION (15);Balance Sheet (15)imIncome Statement (16)%<STATEMENTS OF PARTNERS CA (15)uCash Flows (16)%8 PAGE 556 NOTE 4 INCOME TAXES&} NOTE 5 OIL AND GAS PRODUC (30)& NOTE 5 OIL AND GAS PRODUC (31)&z NOTE 6 RELATED PARTY TRANS (6)&R NOTE 6 RELATED PARTY TRANS (7)%"xNOTE 7 OIL AND GAS INFORM (30)%NOTE 7 OIL AND GAS INFORM (31)%8{NOTE 7 OIL AND GAS INFORM (32)& 11 PAGE 559 NOTE 8 MAJOR CUSTO#}SELECTED FINANCIAL DATA (15)%<SUPPLEMENTAL INFORMATION (16)Balance Sheet (16)Income Statement (17)%唿STATEMENTS OF PARTNERS CA (16)TCash Flows (17)gNOTE 4 INCOME TAXES (10)&  NOTE 5 OIL AND GAS PRODUC (32)&N NOTE 5 OIL AND GAS PRODUC (33)& 9 PAGE 576 NOTE 6 RELATED PART& 9 PAGE 576 NOTE 6 RELATED (1)%NOTE 7 OIL AND GAS INFORM (33)% NOTE 7 OIL AND GAS INFORM (34)%NOTE 7 OIL AND GAS INFORM (35)&ӡ11 PAGE 578 NOTE 8 MAJOR CUSTOM#E SELECTED FINANCIAL DATA (16)%qSUPPLEMENTAL INFORMATION (17)%-ITEM 6 SELECTED FINANCIAL (10)& 8 PAGE 594 ITEM 8 FINANCIAL STA5Balance Sheet (17) Income Statement (18)%@STATEMENTS OF PARTNERS CA (17)Cash Flows (18)KNOTE 4 INCOME TAXES (11)&& NOTE 5 OIL AND GAS PRODUC (34)&K NOTE 5 OIL AND GAS PRODUC (35)&F 17 PAGE 603 NOTE 6 RELATED PAR&I 17 PAGE 603 NOTE 6 RELATED (1)%NOTE 7 OIL AND GAS INFORM (36)%KNOTE 7 OIL AND GAS INFORM (37)%NOTE 7 OIL AND GAS INFORM (38)&$Q 19 PAGE 605 NOTE 8 MAJOR CUSTO&ITEM 10 DIRECTORS AND EXEC (10) FQBeneficial Ownership (10)PARKER PARSLEY 87A LTD#SSELECTED FINANCIAL DATA (17)%QSUPPLEMENTAL INFORMATION (18)`Balance Sheet (18)Income Statement (19)%WkSTATEMENTS OF PARTNERS CA (18)Cash Flows (19)%u8 PAGE 625 NOTE 4 INCOME TAXES&$ NOTE 5 OIL AND GAS PRODUC (36)&bs NOTE 5 OIL AND GAS PRODUC (37)& 9 PAGE 626 NOTE 6 RELATED PART&'q 9 PAGE 626 NOTE 6 RELATED (1)%NOTE 7 OIL AND GAS INFORM (39)%rNOTE 7 OIL AND GAS INFORM (40)%!NOTE 7 OIL AND GAS INFORM (41)&pw 11 PAGE 628 NOTE 8 MAJOR CUSTO#SELECTED FINANCIAL DATA (18)%̀SUPPLEMENTAL INFORMATION (19)%-ITEM 6 SELECTED FINANCIAL (11)$wINDEX TO FINANCIAL STATEM (8)? Balance Sheet (19)Income Statement (20)%STATEMENTS OF PARTNERS CA (19)Cash Flows (20)$!NOTE 4 INCOME TAXES (12)& NOTE 5 OIL AND GAS PRODUC (38)&  NOTE 5 OIL AND GAS PRODUC (39)&x 17 PAGE 653 NOTE 6 RELATED PAR& 17 PAGE 653 NOTE 6 RELATED (1)%ٞNOTE 7 OIL AND GAS INFORM (42)% NOTE 7 OIL AND GAS INFORM (43)%NOTE 7 OIL AND GAS INFORM (44)&% 19 PAGE 655 NOTE 8 MAJOR CUSTO&%ITEM 10 DIRECTORS AND EXEC (11) %Beneficial Ownership (11)DPARKER PARSLEY 87B LTDd'INDEX TO EXHIBITS (9)#SELECTED FINANCIAL DATA (19)% 5SUPPLEMENTAL INFORMATION (20)%XITEM 6 SELECTED FINANCIAL (12)$?INDEX TO FINANCIAL STATEM (9)Balance Sheet (20)ZDIncome Statement (21)%/STATEMENTS OF PARTNERS CA (20)MCash Flows (21)&16 PAGE 683 NOTE 4 INCOME TAXES&U NOTE 5 OIL AND GAS PRODUC (40)& NOTE 5 OIL AND GAS PRODUC (41)&HS NOTE 6 RELATED PARTY TRANS (8)& NOTE 6 RELATED PARTY TRANS (9)%QNOTE 7 OIL AND GAS INFORM (45)%NOTE 7 OIL AND GAS INFORM (46)%TNOTE 7 OIL AND GAS INFORM (47)&R19 PAGE 686 NOTE 8 MAJOR CUSTOM&VITEM 10 DIRECTORS AND EXEC (12) iBeneficial Ownership (12)VPROPERTIES 87A LTDINDEX TO EXHIBITS (10)#aSELECTED FINANCIAL DATA (20)%bSUPPLEMENTAL INFORMATION (21)%nITEM 6 SELECTED FINANCIAL (13)$ INDEX TO FINANCIAL STATE (10)uBalance Sheet (21)Income Statement (22)%}STATEMENTS OF PARTNERS CA (21)Cash Flows (22)&16 PAGE 714 NOTE 4 INCOME TAXES&  NOTE 5 OIL AND GAS PRODUC (42)& NOTE 5 OIL AND GAS PRODUC (43)&j  17 PAGE 715 NOTE 6 RELATED PAR& 17 PAGE 715 NOTE 6 RELATED (1)%/ NOTE 7 OIL AND GAS INFORM (48)%NOTE 7 OIL AND GAS INFORM (49)%7 NOTE 7 OIL AND GAS INFORM (50)& 19 PAGE 717 NOTE 8 MAJOR CUSTO&iITEM 10 DIRECTORS AND EXEC (13) Beneficial Ownership (13)\PROPERTIES 87B LTDyINDEX TO EXHIBITS (11)#hSELECTED FINANCIAL DATA (21)%9SUPPLEMENTAL INFORMATION (22)$Balance Sheet (22)ЩIncome Statement (23)%/STATEMENTS OF PARTNERS CA (22)Cash Flows (23)%:8 PAGE 737 NOTE 4 INCOME TAXES&u NOTE 5 OIL AND GAS PRODUC (44)&8 NOTE 5 OIL AND GAS PRODUC (45)&P 9 PAGE 738 NOTE 6 RELATED PART&6 9 PAGE 738 NOTE 6 RELATED (1)%NOTE 7 OIL AND GAS INFORM (51)%8NOTE 7 OIL AND GAS INFORM (52)%޹NOTE 7 OIL AND GAS INFORM (53)&>= 11 PAGE 740 NOTE 8 MAJOR CUSTO#GSELECTED FINANCIAL DATA (22)%GSUPPLEMENTAL INFORMATION (23)Balance Sheet (23)OIncome Statement (24)% STATEMENTS OF PARTNERS CA (23)XCash Flows (24)%<8 PAGE 756 NOTE 4 INCOME TAXES&` NOTE 5 OIL AND GAS PRODUC (46)&` NOTE 5 OIL AND GAS PRODUC (47)&] 9 PAGE 757 NOTE 6 RELATED PART& 9 PAGE 757 NOTE 6 RELATED (1)%\NOTE 7 OIL AND GAS INFORM (54)%NOTE 7 OIL AND GAS INFORM (55)%!`NOTE 7 OIL AND GAS INFORM (56)& 11 PAGE 759 NOTE 8 MAJOR CUSTO#bSELECTED FINANCIAL DATA (23)&31 2000 1 PAGE 766 PARKER PARSLtnPARKER PARSLEY 88A LP%0ITEM 6 SELECTED FINANCIAL (14)$3rINDEX TO FINANCIAL STATE (11)Balance Sheet (24)vv Income Statement (25)%> STATEMENTS OF PARTNERS CA (24) Cash Flows (25)j NOTE 4 INCOME TAXES (13)&  NOTE 5 OIL AND GAS PRODUC (48)&I  NOTE 5 OIL AND GAS PRODUC (49)&  16 PAGE 783 NOTE 6 RELATED PAR&& 16 PAGE 783 NOTE 6 RELATED (1)%NOTE 7 OIL AND GAS INFORM (57)%NOTE 7 OIL AND GAS INFORM (58)% NOTE 7 OIL AND GAS INFORM (59)& 18 PAGE 785 NOTE 8 MAJOR CUSTO&@ITEM 10 DIRECTORS AND EXEC (14) aBeneficial Ownership (14) PARKER PARSLEY 88A LP (1) INDEX TO EXHIBITS (12)#SELECTED FINANCIAL DATA (24)%SUPPLEMENTAL INFORMATION (24)Balance Sheet (25)0Income Statement (26)%STATEMENTS OF PARTNERS CA (25)(Cash Flows (26)%8 PAGE 805 NOTE 4 INCOME TAXES&0 NOTE 5 OIL AND GAS PRODUC (50)& NOTE 5 OIL AND GAS PRODUC (51)&- 9 PAGE 806 NOTE 6 RELATED PART&% 9 PAGE 806 NOTE 6 RELATED (1)% ,NOTE 7 OIL AND GAS INFORM (60)%NOTE 7 OIL AND GAS INFORM (61)%6/NOTE 7 OIL AND GAS INFORM (62)& 11 PAGE 808 NOTE 8 MAJOR CUSTO#0SELECTED FINANCIAL DATA (25)&y31 2000 1 PAGE 815 PARKER PARSL =PARKER PARSLEY 88B LP%ITEM 6 SELECTED FINANCIAL (15)$@INDEX TO FINANCIAL STATE (12)bBalance Sheet (26)EIncome Statement (27)%STATEMENTS OF PARTNERS CA (26)>OCash Flows (27)&16 PAGE 832 NOTE 4 INCOME TAXES&lW NOTE 5 OIL AND GAS PRODUC (52)& NOTE 5 OIL AND GAS PRODUC (53)&GT 17 PAGE 833 NOTE 6 RELATED PAR& 17 PAGE 833 NOTE 6 RELATED (1)%UR NOTE 7 OIL AND GAS INFORM (63)% NOTE 7 OIL AND GAS INFORM (64)%SU!NOTE 7 OIL AND GAS INFORM (65)&! 19 PAGE 835 NOTE 8 MAJOR CUSTO&V"ITEM 10 DIRECTORS AND EXEC (15) "Beneficial Ownership (15) OV#PARKER PARSLEY 88B LP (1)/#INDEX TO EXHIBITS (13)#\$SELECTED FINANCIAL DATA (26)%$SUPPLEMENTAL INFORMATION (25)i%Balance Sheet (27)=%Income Statement (28)% t&STATEMENTS OF PARTNERS CA (27)&Cash Flows (28)%'8 PAGE 855 NOTE 4 INCOME TAXES&' NOTE 5 OIL AND GAS PRODUC (54)&|( NOTE 5 OIL AND GAS PRODUC (55)&V( 9 PAGE 856 NOTE 6 RELATED PART&z) 9 PAGE 856 NOTE 6 RELATED (1)%i)NOTE 7 OIL AND GAS INFORM (66)% |*NOTE 7 OIL AND GAS INFORM (67)%{*NOTE 7 OIL AND GAS INFORM (68)&ڀ+ 11 PAGE 858 NOTE 8 MAJOR CUSTO#+SELECTED FINANCIAL DATA (27)&,31 2000 1 PAGE 865 PARKER PARSL( -Balance Sheet (28)B-Income Statement (29)%X.STATEMENTS OF PARTNERS CA (28)).Cash Flows (29)%!/8 PAGE 874 NOTE 4 INCOME TAXES&/ NOTE 5 OIL AND GAS PRODUC (56)&% 0 NOTE 5 OIL AND GAS PRODUC (57)&ğ0 9 PAGE 875 NOTE 6 RELATED PART&1 9 PAGE 875 NOTE 6 RELATED (1)%1NOTE 7 OIL AND GAS INFORM (69)% 2NOTE 7 OIL AND GAS INFORM (70)%n2NOTE 7 OIL AND GAS INFORM (71)&&3 11 PAGE 877 NOTE 8 MAJOR CUSTO#3SELECTED FINANCIAL DATA (28)%-4SUPPLEMENTAL INFORMATION (26)&4PARKER PARSLEY PRODUCING PROPER%,5ITEM 6 SELECTED FINANCIAL (16)$p5INDEX TO FINANCIAL STATE (13)+36Balance Sheet (29)@6Income Statement (30)%=7STATEMENTS OF PARTNERS CA (29)7Cash Flows (30)[H8NOTE 4 INCOME TAXES (14)&8 NOTE 5 OIL AND GAS PRODUC (58)&F9 NOTE 5 OIL AND GAS PRODUC (59)&9 16 PAGE 901 NOTE 6 RELATED PAR&QD: 16 PAGE 901 NOTE 6 RELATED (1)%Z:NOTE 7 OIL AND GAS INFORM (72)%E;NOTE 7 OIL AND GAS INFORM (73)&;18 PAGE 903 NOTE 8 MAJOR CUSTOM&L<ITEM 10 DIRECTORS AND EXEC (16) <Beneficial Ownership (16)L=PROPERTIES 88A LP=INDEX TO EXHIBITS (14)#S>SELECTED FINANCIAL DATA (29)%>SUPPLEMENTAL INFORMATION (27)6_?Balance Sheet (30)?Income Statement (31)%^i@STATEMENTS OF PARTNERS CA (30)@Cash Flows (31)sANOTE 4 INCOME TAXES (15)&9A NOTE 5 OIL AND GAS PRODUC (60)&qB NOTE 5 OIL AND GAS PRODUC (61)&#B 9 PAGE 924 NOTE 6 RELATED PART&ooC 9 PAGE 924 NOTE 6 RELATED (1)%'CNOTE 7 OIL AND GAS INFORM (74)%pDNOTE 7 OIL AND GAS INFORM (75)%DNOTE 7 OIL AND GAS INFORM (76)&uE 11 PAGE 926 NOTE 8 MAJOR CUSTO#ESELECTED FINANCIAL DATA (30)%|FSUPPLEMENTAL INFORMATION (28)NFBalance Sheet (31)fGIncome Statement (32)% HSTATEMENTS OF PARTNERS CA (31)+HCash Flows (32)pINOTE 4 INCOME TAXES (16)&I NOTE 5 OIL AND GAS PRODUC (62)&?J NOTE 5 OIL AND GAS PRODUC (63)&J 9 PAGE 943 NOTE 6 RELATED PART&K 9 PAGE 943 NOTE 6 RELATED (1)%őKNOTE 7 OIL AND GAS INFORM (77)%DLNOTE 7 OIL AND GAS INFORM (78)%LNOTE 7 OIL AND GAS INFORM (79)&KM11 PAGE 945 NOTE 8 MAJOR CUSTOM#MSELECTED FINANCIAL DATA (31)&N31 2000 1 PAGE 952 PARKER PARSLwNPARKER PARSLEY 89A LP%2OITEM 6 SELECTED FINANCIAL (17)$:OINDEX TO FINANCIAL STATE (14)%PBalance Sheet (32)PIncome Statement (33)%0QSTATEMENTS OF PARTNERS CA (32)QCash Flows (33)\;RNOTE 4 INCOME TAXES (17)&R NOTE 5 OIL AND GAS PRODUC (64)&9S NOTE 5 OIL AND GAS PRODUC (65)&S 16 PAGE 969 NOTE 6 RELATED PAR&7T 16 PAGE 969 NOTE 6 RELATED (1)%fTNOTE 7 OIL AND GAS INFORM (80)%8UNOTE 7 OIL AND GAS INFORM (81)%UNOTE 7 OIL AND GAS INFORM (82)%7VNOTE 7 OIL AND GAS INFORM (83)&ӺV 18 PAGE 971 NOTE 8 MAJOR CUSTO&8WITEM 10 DIRECTORS AND EXEC (17) zWBeneficial Ownership (17) 8XPARKER PARSLEY 89A LP (1)HXINDEX TO EXHIBITS (15)#BYSELECTED FINANCIAL DATA (32)%YSUPPLEMENTAL INFORMATION (29)OZBalance Sheet (33)AZIncome Statement (34)%Y[STATEMENTS OF PARTNERS CA (33)_[Cash Flows (34)%]d\8 PAGE 991 NOTE 4 INCOME TAXES&\ NOTE 5 OIL AND GAS PRODUC (66)&[b] NOTE 5 OIL AND GAS PRODUC (67)&] 9 PAGE 992 NOTE 6 RELATED PART&:`^ 9 PAGE 992 NOTE 6 RELATED (1)%^NOTE 7 OIL AND GAS INFORM (84)%c_NOTE 7 OIL AND GAS INFORM (85)%_NOTE 7 OIL AND GAS INFORM (86)&dh` 11 PAGE 994 NOTE 8 MAJOR CUSTO#i`SELECTED FINANCIAL DATA (33)&^pa31 2000 1 PAGE 1001 PARKER PARSaBalance Sheet (34)'xbIncome Statement (35)%bSTATEMENTS OF PARTNERS CA (34)cCash Flows (35)& d8 PAGE 1010 NOTE 4 INCOME TAXES&~d NOTE 5 OIL AND GAS PRODUC (68)&e NOTE 5 OIL AND GAS PRODUC (69)&He 9 PAGE 1011 NOTE 6 RELATED PAR&f 9 PAGE 1011 NOTE 6 RELATED (1)%hfNOTE 7 OIL AND GAS INFORM (87)%gNOTE 7 OIL AND GAS INFORM (88)%&gNOTE 7 OIL AND GAS INFORM (89)&c h11 PAGE 1013 NOTE 8 MAJOR CUSTO#)hSELECTED FINANCIAL DATA (34)%iSUPPLEMENTAL INFORMATION (30)]iBalance Sheet (35)jIncome Statement (36)%jSTATEMENTS OF PARTNERS CA (35)4#kCash Flows (36)&k8 PAGE 1029 NOTE 4 INCOME TAXES&S*l NOTE 5 OIL AND GAS PRODUC (70)&l NOTE 5 OIL AND GAS PRODUC (71)&'m 9 PAGE 1030 NOTE 6 RELATED PAR&m 9 PAGE 1030 NOTE 6 RELATED (1)%'nNOTE 7 OIL AND GAS INFORM (90)%nNOTE 7 OIL AND GAS INFORM (91)%*oNOTE 7 OIL AND GAS INFORM (92)&so 11 PAGE 1032 NOTE 8 MAJOR CUST#+pSELECTED FINANCIAL DATA (35)%pSUPPLEMENTAL INFORMATION (31)7qBalance Sheet (36)qIncome Statement (37)%dBrSTATEMENTS OF PARTNERS CA (36)rCash Flows (37)&Ms8 PAGE 1048 NOTE 4 INCOME TAXES&s NOTE 5 OIL AND GAS PRODUC (72)&?Kt NOTE 5 OIL AND GAS PRODUC (73)&t 9 PAGE 1049 NOTE 6 RELATED PAR&9Iu 9 PAGE 1049 NOTE 6 RELATED (1)%uNOTE 7 OIL AND GAS INFORM (93)%LvNOTE 7 OIL AND GAS INFORM (94)%vNOTE 7 OIL AND GAS INFORM (95)&@Qw 11 PAGE 1051 NOTE 8 MAJOR CUST#&wSELECTED FINANCIAL DATA (36)&Yx31 2000 1 PAGE 1058 PARKER PARSxPARKER PARSLEY 90A LP%PYyITEM 6 SELECTED FINANCIAL (18)$6yINDEX TO FINANCIAL STATE (15)_zBalance Sheet (37)#zIncome Statement (38)%j{STATEMENTS OF PARTNERS CA (37)+{Cash Flows (38)&u|15 PAGE 1074 NOTE 4 INCOME TAXE&,| NOTE 5 OIL AND GAS PRODUC (74)&s} NOTE 5 OIL AND GAS PRODUC (75)&} NOTE 6 RELATED PARTY TRAN (10)&1q~ NOTE 6 RELATED PARTY TRAN (11)% ~NOTE 7 OIL AND GAS INFORM (96)%otNOTE 7 OIL AND GAS INFORM (97)& 18 PAGE 1077 NOTE 8 MAJOR CUST&{ITEM 10 DIRECTORS AND EXEC (18) jBeneficial Ownership (18) {PARKER PARSLEY 90A LP (1)INDEX TO EXHIBITS (16)#FSELECTED FINANCIAL DATA (37)%SUPPLEMENTAL INFORMATION (32)!xPARKER PARSLEY 90B CONV LP%2ITEM 6 SELECTED FINANCIAL (19)$4INDEX TO FINANCIAL STATE (16)Balance Sheet (38)ꚅIncome Statement (39)%] STATEMENTS OF PARTNERS CA (38)أCash Flows (39)&+16 PAGE 1105 NOTE 4 INCOME TAXE&֫ NOTE 5 OIL AND GAS PRODUC (76)&) NOTE 5 OIL AND GAS PRODUC (77)&o NOTE 6 RELATED PARTY TRAN (12)&& NOTE 6 RELATED PARTY TRAN (13)%NOTE 7 OIL AND GAS INFORM (98)%8*NOTE 7 OIL AND GAS INFORM (99)%UNOTE 7 OIL AND GAS INFOR (100)&. 19 PAGE 1108 NOTE 8 MAJOR CUST&ITEM 10 DIRECTORS AND EXEC (19) ./Beneficial Ownership (19)%PARKER PARSLEY 90B CONV LP (1)0INDEX TO EXHIBITS (17)#+SELECTED FINANCIAL DATA (38)&B31 2000 1 PAGE 1119 PARKER PARSĎPARKER PARSLEY 90B LP%BITEM 6 SELECTED FINANCIAL (20)$ɏINDEX TO FINANCIAL STATE (17)IBalance Sheet (39)ΐIncome Statement (40)%YTSTATEMENTS OF PARTNERS CA (39)בCash Flows (40)&;_16 PAGE 1136 NOTE 4 INCOME TAXE&  NOTE 5 OIL AND GAS PRODUC (78)&l] NOTE 5 OIL AND GAS PRODUC (79)&ܓ NOTE 6 RELATED PARTY TRAN (14)&[ NOTE 6 RELATED PARTY TRAN (15)%6ݔNOTE 7 OIL AND GAS INFOR (101)%^NOTE 7 OIL AND GAS INFOR (102)%oNOTE 7 OIL AND GAS INFOR (103)&c 19 PAGE 1139 NOTE 8 MAJOR CUS&ITEM 10 DIRECTORS AND EXEC (20) dBeneficial Ownership (20) PARKER PARSLEY 90B LP (1)eINDEX TO EXHIBITS (18)#3SELECTED FINANCIAL DATA (39)%-wSUPPLEMENTAL INFORMATION (33)!PARKER PARSLEY 90C CONV LP%wITEM 6 SELECTED FINANCIAL (21)$INDEX TO FINANCIAL STATE (18)~Balance Sheet (40)Income Statement (41)%%STATEMENTS OF PARTNERS CA (40) Cash Flows (41)&15 PAGE 1166 NOTE 4 INCOME TAXE& NOTE 5 OIL AND GAS PRODUC (80)&N NOTE 5 OIL AND GAS PRODUC (81)& NOTE 6 RELATED PARTY TRAN (16)&3 NOTE 6 RELATED PARTY TRAN (17)%NOTE 7 OIL AND GAS INFOR (104)%NOTE 7 OIL AND GAS INFOR (105)%#NOTE 7 OIL AND GAS INFOR (106)&{ 18 PAGE 1169 NOTE 8 MAJOR CUST&ITEM 10 DIRECTORS AND EXEC (21) ;Beneficial Ownership (21)%PARKER PARSLEY 90C CONV LP (1)zINDEX TO EXHIBITS (19)#!SELECTED FINANCIAL DATA (40)&31 2000 1 PAGE 1180 PARKER PARSG.PARKER PARSLEY 90C LP%ITEM 6 SELECTED FINANCIAL (22)$1INDEX TO FINANCIAL STATE (19)Balance Sheet (41)6Income Statement (42)%STATEMENTS OF PARTNERS CA (41)?Cash Flows (42)&ƨ15 PAGE 1196 NOTE 4 INCOME TAXE&H NOTE 5 OIL AND GAS PRODUC (82)&ũ NOTE 5 OIL AND GAS PRODUC (83)&CE NOTE 6 RELATED PARTY TRAN (18)&ê NOTE 6 RELATED PARTY TRAN (19)%kENOTE 7 OIL AND GAS INFOR (107)%ǫNOTE 7 OIL AND GAS INFOR (108)%QHNOTE 7 OIL AND GAS INFOR (109)&ˬ 18 PAGE 1199 NOTE 8 MAJOR CUST&IITEM 10 DIRECTORS AND EXEC (22) r˭Beneficial Ownership (22) IPARKER PARSLEY 90C LP (1)̮INDEX TO EXHIBITS (20)#hTSELECTED FINANCIAL DATA (41)%HޯSUPPLEMENTAL INFORMATION (34)`Balance Sheet (42)Income Statement (43)%[kSTATEMENTS OF PARTNERS CA (42)Cash Flows (43)&v8 PAGE 1219 NOTE 4 INCOME TAXES&F NOTE 5 OIL AND GAS PRODUC (84)&s NOTE 5 OIL AND GAS PRODUC (85)& 9 PAGE 1220 NOTE 6 RELATED PAR&q 9 PAGE 1220 NOTE 6 RELATED (1)%NOTE 7 OIL AND GAS INFOR (110)%tNOTE 7 OIL AND GAS INFOR (111)%NOTE 7 OIL AND GAS INFOR (112)&wy 11 PAGE 1222 NOTE 8 MAJOR CUST#SELECTED FINANCIAL DATA (42)%jSUPPLEMENTAL INFORMATION (35)Balance Sheet (43)Income Statement (44)%YSTATEMENTS OF PARTNERS CA (43)ΑCash Flows (44)&8 PAGE 1238 NOTE 4 INCOME TAXES& NOTE 5 OIL AND GAS PRODUC (86)& NOTE 5 OIL AND GAS PRODUC (87)&: 9 PAGE 1239 NOTE 6 RELATED PAR&w 9 PAGE 1239 NOTE 6 RELATED (1)%ΕNOTE 7 OIL AND GAS INFOR (113)%oNOTE 7 OIL AND GAS INFOR (114)%NOTE 7 OIL AND GAS INFOR (115)& 11 PAGE 1241 NOTE 8 MAJOR CUST#{SELECTED FINANCIAL DATA (43)&$31 2000 1 PAGE 1248 PARKER PARS_PARKER PARSLEY 91A LP%%ITEM 6 SELECTED FINANCIAL (23)$ìINDEX TO FINANCIAL STATE (20),Balance Sheet (44)ıIncome Statement (45)%67STATEMENTS OF PARTNERS CA (44)Cash Flows (45)&FB15 PAGE 1264 NOTE 4 INCOME TAXE& NOTE 5 OIL AND GAS PRODUC (88)&_@ NOTE 5 OIL AND GAS PRODUC (89)& NOTE 6 RELATED PARTY TRAN (20)&8> NOTE 6 RELATED PARTY TRAN (21)%HNOTE 7 OIL AND GAS INFOR (116)%)@NOTE 7 OIL AND GAS INFOR (117)%lNOTE 7 OIL AND GAS INFOR (118)&D 18 PAGE 1267 NOTE 8 MAJOR CUST&NITEM 10 DIRECTORS AND EXEC (23) DBeneficial Ownership (23) IPARKER PARSLEY 91A LP (1))FINDEX TO EXHIBITS (21)#,SELECTED FINANCIAL DATA (44)& U31 2000 1 PAGE 1278 PARKER PARSPARKER PARSLEY 91B LP%nTITEM 6 SELECTED FINANCIAL (24)$sINDEX TO FINANCIAL STATE (21)#[Balance Sheet (45)4Income Statement (46)%eSTATEMENTS OF PARTNERS CA (45)#Cash Flows (46)&.p15 PAGE 1294 NOTE 4 INCOME TAXE&T NOTE 5 OIL AND GAS PRODUC (90)&o NOTE 5 OIL AND GAS PRODUC (91)& NOTE 6 RELATED PARTY TRAN (22)&m NOTE 6 RELATED PARTY TRAN (23)%NOTE 7 OIL AND GAS INFOR (119)%VoNOTE 7 OIL AND GAS INFOR (120)%NOTE 7 OIL AND GAS INFOR (121)&s 18 PAGE 1297 NOTE 8 MAJOR CUST&ITEM 10 DIRECTORS AND EXEC (24) sBeneficial Ownership (24) DPARKER PARSLEY 91B LP (1)auINDEX TO EXHIBITS (22)#SELECTED FINANCIAL DATA (45)fPOWER OF ATTORNEY POWER OF ATTORNEY (1){POWER OF ATTORNEY (2)5POWER OF ATTORNEY (3)POWER OF ATTORNEY (4)YaPOWER OF ATTORNEY (5)0POWER OF ATTORNEY (6)POWER OF ATTORNEY (7)&2001 THE BOARD OF DIRECTORS REC&:2001 THE BOARD OF DIRECTORS (1)&E2001 THE BOARD OF DIRECTORS (2)rPAGE 2 l   dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??!CALCULATION OF REGISTRATION FEETO BE HELD ON 2001TABLE OF CONTENTSPAGE 7 LIST OF APPENDICES!LIMITED PARTNER INVESTMENT REPA!LIMITED PARTNER INVESTMENT (1) 5 PAGE 15 NYMEX FUTURES PRICES!EXAMPLE CALCULATION OF MERGER VIncome StatementIncome Statement (1)AT DECEMBER 31 2000!15 PAGE 25 COMPARATIVE PER SHAR!25 PAGE 35 REASONS FOR THE MERGFAIRNESS OPINIONFAIRNESS OPINION (1)!LEGAL OPINION FOR LIMITED PARTN!LEGAL OPINION FOR LIMITED P (1)!NONMANAGING GENERAL PARTNERS OF!49 PAGE 59 PAYMENT OF EXPENSES !58 PAGE 68 COMPARATIVE PER SHAR!60 PAGE 70 OWNERSHIP OF PARTNER PIONEER PIONEER USATHE DRILLING PARTNERSHIPSTHE DRILLING PARTNERSHIPS (1)THE INCOME PARTNERSHIPS INTERESTSINTERESTS (1)INTERESTS (2)INTERESTS (3)INTERESTS (4)INTERESTS (5)!WHERE YOU CAN FIND MORE INFORMAAS OF DECEMBER 31 2000YEAR ENDED DECEMBER 31 2000!QUANTITIES OF OIL AND GAS RESER!STANDARDIZED MEASURE OF DISCOUN CASH FLOWSAS OF MARCH 31 2001AS OF MARCH 31 2001 (1)AS OF MARCH 31 2001 (2)AS OF MARCH 31 2001 (3)AS OF MARCH 31 2001 (4)AS OF MARCH 31 2001 (5)!FROM INCEPTION THROUGH MARCH 31!ANNUAL REPURCHASE PRICES AND AGOF EACH PARTNERSHIP!FOR THE THREE MONTHS ENDED MARCAS OF DECEMBER 31 2000 (1)AS OF MARCH 31 2001 (6)!THE YEARS ENDED DECEMBER 31 200AS OF DECEMBER 31 2000 (2)DECEMBER 31 2000 AND 1999EFFECTIVE DECEMBER 31 2000 EFFECTIVE DECEMBER 31 2000 (1) RECITALS RECITALS (1) SUPPLEMENTAL INFORMATION TABLEBalance SheetIncome Statement (2) STATEMENTS OF PARTNERS CAPITALCash Flows (1)NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCING A! NOTE 5 OIL AND GAS PRODUCI (1)! NOTE 6 RELATED PARTY TRANSACTI! NOTE 6 RELATED PARTY TRANS (1)! NOTE 7 OIL AND GAS INFORMATION! NOTE 7 OIL AND GAS INFORMA (1)! NOTE 7 OIL AND GAS INFORMA (2)!11 PAGE 163 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA SUPPLEMENTAL INFORMATION T (1)Balance Sheet (1)Income Statement (3) STATEMENTS OF PARTNERS CAP (1)Cash Flows (2)NOTE 4 INCOME TAXES (1)! NOTE 5 OIL AND GAS PRODUCI (2)! NOTE 5 OIL AND GAS PRODUCI (3)! 9 PAGE 180 NOTE 6 RELATED PAR! 9 PAGE 180 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORMA (3)! NOTE 7 OIL AND GAS INFORMA (4)! NOTE 7 OIL AND GAS INFORMA (5)!11 PAGE 182 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (1) SUPPLEMENTAL INFORMATION T (2) ITEM 6 SELECTED FINANCIAL DATAINDEX TO FINANCIAL STATEMENTSBalance Sheet (2)Income Statement (4) STATEMENTS OF PARTNERS CAP (2)Cash Flows (3)!15 PAGE 205 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCI (4)! NOTE 5 OIL AND GAS PRODUCI (5)! NOTE 6 RELATED PARTY TRANS (2)! NOTE 6 RELATED PARTY TRANS (3)! NOTE 7 OIL AND GAS INFORMA (6)! NOTE 7 OIL AND GAS INFORMA (7)! NOTE 7 OIL AND GAS INFORMA (8)! NOTE 7 OIL AND GAS INFORMA (9)! NOTE 7 OIL AND GAS INFORM (10)! 18 PAGE 208 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECUTIVEBeneficial OwnershipPARKER PARSLEY 82I LTDINDEX TO EXHIBITSSELECTED FINANCIAL DATA (2) SUPPLEMENTAL INFORMATION T (3) ITEM 6 SELECTED FINANCIAL (1)INDEX TO FINANCIAL STATEM (1)Balance Sheet (3)Income Statement (5) STATEMENTS OF PARTNERS CAP (3)Cash Flows (4)NOTE 4 INCOME TAXES (2)! NOTE 5 OIL AND GAS PRODUCI (6)! NOTE 5 OIL AND GAS PRODUCI (7)! 16 PAGE 236 NOTE 6 RELATED PAR! 16 PAGE 236 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (11)! NOTE 7 OIL AND GAS INFORM (12)! NOTE 7 OIL AND GAS INFORM (13)!18 PAGE 238 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (1)Beneficial Ownership (1)PARKER PARSLEY 82II LTDINDEX TO EXHIBITS (1)SELECTED FINANCIAL DATA (3) SUPPLEMENTAL INFORMATION T (4)Balance Sheet (4)Income Statement (6) STATEMENTS OF PARTNERS CAP (4)Cash Flows (5)NOTE 4 INCOME TAXES (3)! NOTE 5 OIL AND GAS PRODUCI (8)! NOTE 5 OIL AND GAS PRODUCI (9)! 9 PAGE 259 NOTE 6 RELATED PART! 9 PAGE 259 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (14)! NOTE 7 OIL AND GAS INFORM (15)! NOTE 7 OIL AND GAS INFORM (16)!11 PAGE 261 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (4) SUPPLEMENTAL INFORMATION T (5)PARKER PARSLEY 83A LTD ITEM 6 SELECTED FINANCIAL (2)INDEX TO FINANCIAL STATEM (2)Balance Sheet (5)Income Statement (7) STATEMENTS OF PARTNERS CAP (5)Cash Flows (6)NOTE 4 INCOME TAXES (4)! NOTE 5 OIL AND GAS PRODUC (10)! NOTE 5 OIL AND GAS PRODUC (11)! 16 PAGE 285 NOTE 6 RELATED PAR! 16 PAGE 285 NOTE 6 RELATED (1)!NOTE 7 OIL AND GAS INFORMATION  NOTE 7 OIL AND GAS INFORMA (1) NOTE 7 OIL AND GAS INFORMA (2)! 18 PAGE 287 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECU (2)Beneficial Ownership (2)PARKER PARSLEY 83A LTD (1)INDEX TO EXHIBITS (2)SELECTED FINANCIAL DATA (5) SUPPLEMENTAL INFORMATION T (6)PARKER PARSLEY 83B LTD ITEM 6 SELECTED FINANCIAL (3)INDEX TO FINANCIAL STATEM (3)Balance Sheet (6)Income Statement (8) STATEMENTS OF PARTNERS CAP (6)Cash Flows (7)NOTE 4 INCOME TAXES (5)! NOTE 5 OIL AND GAS PRODUC (12)! NOTE 5 OIL AND GAS PRODUC (13)! 16 PAGE 315 NOTE 6 RELATED PAR! 16 PAGE 315 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (3) NOTE 7 OIL AND GAS INFORMA (4) NOTE 7 OIL AND GAS INFORMA (5)!18 PAGE 317 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (3)Beneficial Ownership (3)PARKER PARSLEY 83B LTD (1)INDEX TO EXHIBITS (3)SELECTED FINANCIAL DATA (6) SUPPLEMENTAL INFORMATION T (7)PARKER PARSLEY 84A LTD ITEM 6 SELECTED FINANCIAL (4)INDEX TO FINANCIAL STATEM (4)Balance Sheet (7)Income Statement (9) STATEMENTS OF PARTNERS CAP (7)Cash Flows (8)!15 PAGE 344 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (14)! NOTE 5 OIL AND GAS PRODUC (15)! 16 PAGE 345 NOTE 6 RELATED PAR! 16 PAGE 345 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (6) NOTE 7 OIL AND GAS INFORMA (7) NOTE 7 OIL AND GAS INFORMA (8)!18 PAGE 347 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (4)Beneficial Ownership (4)PARKER PARSLEY 84A LTD (1)INDEX TO EXHIBITS (4)SELECTED FINANCIAL DATA (7) SUPPLEMENTAL INFORMATION T (8)PARKER PARSLEY 85A LTD ITEM 6 SELECTED FINANCIAL (5)INDEX TO FINANCIAL STATEM (5)Balance Sheet (8)Income Statement (10) STATEMENTS OF PARTNERS CAP (8)Cash Flows (9)NOTE 4 INCOME TAXES (6)! NOTE 5 OIL AND GAS PRODUC (16)! NOTE 5 OIL AND GAS PRODUC (17)! 16 PAGE 375 NOTE 6 RELATED PAR! 16 PAGE 375 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (9) NOTE 7 OIL AND GAS INFORM (10) NOTE 7 OIL AND GAS INFORM (11)!18 PAGE 377 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (5)Beneficial Ownership (5)PARKER PARSLEY 85A LTD (1)INDEX TO EXHIBITS (5)SELECTED FINANCIAL DATA (8) SUPPLEMENTAL INFORMATION T (9)PARKER PARSLEY 85B LTD ITEM 6 SELECTED FINANCIAL (6)!7 PAGE 396 ITEM 8 FINANCIAL STABalance Sheet (9) STATEMENTS OF PARTNERS CAP (9)Cash Flows (10)!15 PAGE 404 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (18)! NOTE 5 OIL AND GAS PRODUC (19)! 16 PAGE 405 NOTE 6 RELATED PAR! 16 PAGE 405 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (12) NOTE 7 OIL AND GAS INFORM (13) NOTE 7 OIL AND GAS INFORM (14)!18 PAGE 407 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (6)Beneficial Ownership (6)PARKER PARSLEY 85B LTD (1)INDEX TO EXHIBITS (6)SELECTED FINANCIAL DATA (9) SUPPLEMENTAL INFORMATION (10)Balance Sheet (10)Income Statement (11) STATEMENTS OF PARTNERS CA (10)Cash Flows (11)NOTE 4 INCOME TAXES (7)! NOTE 5 OIL AND GAS PRODUC (20)! NOTE 5 OIL AND GAS PRODUC (21)! 9 PAGE 428 NOTE 6 RELATED PART! 9 PAGE 428 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (15) NOTE 7 OIL AND GAS INFORM (16) NOTE 7 OIL AND GAS INFORM (17)! 11 PAGE 430 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (10) SUPPLEMENTAL INFORMATION (11)Balance Sheet (11)Income Statement (12) STATEMENTS OF PARTNERS CA (11)Cash Flows (12) 8 PAGE 446 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (22)! NOTE 5 OIL AND GAS PRODUC (23)! 9 PAGE 447 NOTE 6 RELATED PART! 9 PAGE 447 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (18) NOTE 7 OIL AND GAS INFORM (19) NOTE 7 OIL AND GAS INFORM (20)! 11 PAGE 449 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (11) SUPPLEMENTAL INFORMATION (12)PARKER PARSLEY 86A LTD ITEM 6 SELECTED FINANCIAL (7)INDEX TO FINANCIAL STATEM (6)Balance Sheet (12)Income Statement (13) STATEMENTS OF PARTNERS CA (12)Cash Flows (13)NOTE 4 INCOME TAXES (8)! NOTE 5 OIL AND GAS PRODUC (24)! NOTE 5 OIL AND GAS PRODUC (25)! 16 PAGE 473 NOTE 6 RELATED PAR! 16 PAGE 473 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (21) NOTE 7 OIL AND GAS INFORM (22) NOTE 7 OIL AND GAS INFORM (23)!18 PAGE 475 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (7)Beneficial Ownership (7)PARKER PARSLEY 86A LTD (1)INDEX TO EXHIBITS (7)SELECTED FINANCIAL DATA (12) SUPPLEMENTAL INFORMATION (13)PARKER PARSLEY 86B LTD ITEM 6 SELECTED FINANCIAL (8)INDEX TO FINANCIAL STATEM (7)Balance Sheet (13)Income Statement (14) STATEMENTS OF PARTNERS CA (13)Cash Flows (14)!16 PAGE 503 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (26)! NOTE 5 OIL AND GAS PRODUC (27)! NOTE 6 RELATED PARTY TRANS (4)! NOTE 6 RELATED PARTY TRANS (5) NOTE 7 OIL AND GAS INFORM (24) NOTE 7 OIL AND GAS INFORM (25) NOTE 7 OIL AND GAS INFORM (26)!19 PAGE 506 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (8)Beneficial Ownership (8)PARKER PARSLEY 86B LTD (1)INDEX TO EXHIBITS (8)SELECTED FINANCIAL DATA (13) SUPPLEMENTAL INFORMATION (14) ITEM 6 SELECTED FINANCIAL (9)!7 PAGE 525 ITEM 8 FINANCIAL STABalance Sheet (14)Income Statement (15) STATEMENTS OF PARTNERS CA (14)Cash Flows (15)NOTE 4 INCOME TAXES (9)! NOTE 5 OIL AND GAS PRODUC (28)! NOTE 5 OIL AND GAS PRODUC (29)! 16 PAGE 534 NOTE 6 RELATED PAR! 16 PAGE 534 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (27) NOTE 7 OIL AND GAS INFORM (28) NOTE 7 OIL AND GAS INFORM (29)!18 PAGE 536 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (9)Beneficial Ownership (9)PARKER PARSLEY 86C LTDSELECTED FINANCIAL DATA (14) SUPPLEMENTAL INFORMATION (15)Balance Sheet (15)Income Statement (16) STATEMENTS OF PARTNERS CA (15)Cash Flows (16) 8 PAGE 556 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (30)! NOTE 5 OIL AND GAS PRODUC (31)! NOTE 6 RELATED PARTY TRANS (6)! NOTE 6 RELATED PARTY TRANS (7) NOTE 7 OIL AND GAS INFORM (30) NOTE 7 OIL AND GAS INFORM (31) NOTE 7 OIL AND GAS INFORM (32)! 11 PAGE 559 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (15) SUPPLEMENTAL INFORMATION (16)Balance Sheet (16)Income Statement (17) STATEMENTS OF PARTNERS CA (16)Cash Flows (17)NOTE 4 INCOME TAXES (10)! NOTE 5 OIL AND GAS PRODUC (32)! NOTE 5 OIL AND GAS PRODUC (33)! 9 PAGE 576 NOTE 6 RELATED PART! 9 PAGE 576 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (33) NOTE 7 OIL AND GAS INFORM (34) NOTE 7 OIL AND GAS INFORM (35)!11 PAGE 578 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (16) SUPPLEMENTAL INFORMATION (17) ITEM 6 SELECTED FINANCIAL (10)!8 PAGE 594 ITEM 8 FINANCIAL STABalance Sheet (17)Income Statement (18) STATEMENTS OF PARTNERS CA (17)Cash Flows (18)NOTE 4 INCOME TAXES (11)! NOTE 5 OIL AND GAS PRODUC (34)! NOTE 5 OIL AND GAS PRODUC (35)! 17 PAGE 603 NOTE 6 RELATED PAR! 17 PAGE 603 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (36) NOTE 7 OIL AND GAS INFORM (37) NOTE 7 OIL AND GAS INFORM (38)! 19 PAGE 605 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (10)Beneficial Ownership (10)PARKER PARSLEY 87A LTDSELECTED FINANCIAL DATA (17) SUPPLEMENTAL INFORMATION (18)Balance Sheet (18)Income Statement (19) STATEMENTS OF PARTNERS CA (18)Cash Flows (19) 8 PAGE 625 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (36)! NOTE 5 OIL AND GAS PRODUC (37)! 9 PAGE 626 NOTE 6 RELATED PART! 9 PAGE 626 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (39) NOTE 7 OIL AND GAS INFORM (40) NOTE 7 OIL AND GAS INFORM (41)! 11 PAGE 628 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (18) SUPPLEMENTAL INFORMATION (19) ITEM 6 SELECTED FINANCIAL (11)INDEX TO FINANCIAL STATEM (8)Balance Sheet (19)Income Statement (20) STATEMENTS OF PARTNERS CA (19)Cash Flows (20)NOTE 4 INCOME TAXES (12)! NOTE 5 OIL AND GAS PRODUC (38)! NOTE 5 OIL AND GAS PRODUC (39)! 17 PAGE 653 NOTE 6 RELATED PAR! 17 PAGE 653 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (42) NOTE 7 OIL AND GAS INFORM (43) NOTE 7 OIL AND GAS INFORM (44)! 19 PAGE 655 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (11)Beneficial Ownership (11)PARKER PARSLEY 87B LTDINDEX TO EXHIBITS (9)SELECTED FINANCIAL DATA (19) SUPPLEMENTAL INFORMATION (20) ITEM 6 SELECTED FINANCIAL (12)INDEX TO FINANCIAL STATEM (9)Balance Sheet (20)Income Statement (21) STATEMENTS OF PARTNERS CA (20)Cash Flows (21)!16 PAGE 683 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (40)! NOTE 5 OIL AND GAS PRODUC (41)! NOTE 6 RELATED PARTY TRANS (8)! NOTE 6 RELATED PARTY TRANS (9) NOTE 7 OIL AND GAS INFORM (45) NOTE 7 OIL AND GAS INFORM (46) NOTE 7 OIL AND GAS INFORM (47)!19 PAGE 686 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (12)Beneficial Ownership (12)PROPERTIES 87A LTDINDEX TO EXHIBITS (10)SELECTED FINANCIAL DATA (20) SUPPLEMENTAL INFORMATION (21) ITEM 6 SELECTED FINANCIAL (13)INDEX TO FINANCIAL STATE (10)Balance Sheet (21)Income Statement (22) STATEMENTS OF PARTNERS CA (21)Cash Flows (22)!16 PAGE 714 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (42)! NOTE 5 OIL AND GAS PRODUC (43)! 17 PAGE 715 NOTE 6 RELATED PAR! 17 PAGE 715 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (48) NOTE 7 OIL AND GAS INFORM (49) NOTE 7 OIL AND GAS INFORM (50)! 19 PAGE 717 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (13)Beneficial Ownership (13)PROPERTIES 87B LTDINDEX TO EXHIBITS (11)SELECTED FINANCIAL DATA (21) SUPPLEMENTAL INFORMATION (22)Balance Sheet (22)Income Statement (23) STATEMENTS OF PARTNERS CA (22)Cash Flows (23) 8 PAGE 737 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (44)! NOTE 5 OIL AND GAS PRODUC (45)! 9 PAGE 738 NOTE 6 RELATED PART! 9 PAGE 738 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (51) NOTE 7 OIL AND GAS INFORM (52) NOTE 7 OIL AND GAS INFORM (53)! 11 PAGE 740 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (22) SUPPLEMENTAL INFORMATION (23)Balance Sheet (23)Income Statement (24) STATEMENTS OF PARTNERS CA (23)Cash Flows (24) 8 PAGE 756 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (46)! NOTE 5 OIL AND GAS PRODUC (47)! 9 PAGE 757 NOTE 6 RELATED PART! 9 PAGE 757 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (54) NOTE 7 OIL AND GAS INFORM (55) NOTE 7 OIL AND GAS INFORM (56)! 11 PAGE 759 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (23)!31 2000 1 PAGE 766 PARKER PARSLPARKER PARSLEY 88A LP ITEM 6 SELECTED FINANCIAL (14)INDEX TO FINANCIAL STATE (11)Balance Sheet (24)Income Statement (25) STATEMENTS OF PARTNERS CA (24)Cash Flows (25)NOTE 4 INCOME TAXES (13)! NOTE 5 OIL AND GAS PRODUC (48)! NOTE 5 OIL AND GAS PRODUC (49)! 16 PAGE 783 NOTE 6 RELATED PAR! 16 PAGE 783 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (57) NOTE 7 OIL AND GAS INFORM (58) NOTE 7 OIL AND GAS INFORM (59)! 18 PAGE 785 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (14)Beneficial Ownership (14)PARKER PARSLEY 88A LP (1)INDEX TO EXHIBITS (12)SELECTED FINANCIAL DATA (24) SUPPLEMENTAL INFORMATION (24)Balance Sheet (25)Income Statement (26) STATEMENTS OF PARTNERS CA (25)Cash Flows (26) 8 PAGE 805 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (50)! NOTE 5 OIL AND GAS PRODUC (51)! 9 PAGE 806 NOTE 6 RELATED PART! 9 PAGE 806 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (60) NOTE 7 OIL AND GAS INFORM (61) NOTE 7 OIL AND GAS INFORM (62)! 11 PAGE 808 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (25)!31 2000 1 PAGE 815 PARKER PARSLPARKER PARSLEY 88B LP ITEM 6 SELECTED FINANCIAL (15)INDEX TO FINANCIAL STATE (12)Balance Sheet (26)Income Statement (27) STATEMENTS OF PARTNERS CA (26)Cash Flows (27)!16 PAGE 832 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (52)! NOTE 5 OIL AND GAS PRODUC (53)! 17 PAGE 833 NOTE 6 RELATED PAR! 17 PAGE 833 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (63) NOTE 7 OIL AND GAS INFORM (64) NOTE 7 OIL AND GAS INFORM (65)! 19 PAGE 835 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (15)Beneficial Ownership (15)PARKER PARSLEY 88B LP (1)INDEX TO EXHIBITS (13)SELECTED FINANCIAL DATA (26) SUPPLEMENTAL INFORMATION (25)Balance Sheet (27)Income Statement (28) STATEMENTS OF PARTNERS CA (27)Cash Flows (28) 8 PAGE 855 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (54)! NOTE 5 OIL AND GAS PRODUC (55)! 9 PAGE 856 NOTE 6 RELATED PART! 9 PAGE 856 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (66) NOTE 7 OIL AND GAS INFORM (67) NOTE 7 OIL AND GAS INFORM (68)! 11 PAGE 858 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (27)!31 2000 1 PAGE 865 PARKER PARSLBalance Sheet (28)Income Statement (29) STATEMENTS OF PARTNERS CA (28)Cash Flows (29) 8 PAGE 874 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (56)! NOTE 5 OIL AND GAS PRODUC (57)! 9 PAGE 875 NOTE 6 RELATED PART! 9 PAGE 875 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (69) NOTE 7 OIL AND GAS INFORM (70) NOTE 7 OIL AND GAS INFORM (71)! 11 PAGE 877 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (28) SUPPLEMENTAL INFORMATION (26)!PARKER PARSLEY PRODUCING PROPER ITEM 6 SELECTED FINANCIAL (16)INDEX TO FINANCIAL STATE (13)Balance Sheet (29)Income Statement (30) STATEMENTS OF PARTNERS CA (29)Cash Flows (30)NOTE 4 INCOME TAXES (14)! NOTE 5 OIL AND GAS PRODUC (58)! NOTE 5 OIL AND GAS PRODUC (59)! 16 PAGE 901 NOTE 6 RELATED PAR! 16 PAGE 901 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (72) NOTE 7 OIL AND GAS INFORM (73)!18 PAGE 903 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (16)Beneficial Ownership (16)PROPERTIES 88A LPINDEX TO EXHIBITS (14)SELECTED FINANCIAL DATA (29) SUPPLEMENTAL INFORMATION (27)Balance Sheet (30)Income Statement (31) STATEMENTS OF PARTNERS CA (30)Cash Flows (31)NOTE 4 INCOME TAXES (15)! NOTE 5 OIL AND GAS PRODUC (60)! NOTE 5 OIL AND GAS PRODUC (61)! 9 PAGE 924 NOTE 6 RELATED PART! 9 PAGE 924 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (74) NOTE 7 OIL AND GAS INFORM (75) NOTE 7 OIL AND GAS INFORM (76)! 11 PAGE 926 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (30) SUPPLEMENTAL INFORMATION (28)Balance Sheet (31)Income Statement (32) STATEMENTS OF PARTNERS CA (31)Cash Flows (32)NOTE 4 INCOME TAXES (16)! NOTE 5 OIL AND GAS PRODUC (62)! NOTE 5 OIL AND GAS PRODUC (63)! 9 PAGE 943 NOTE 6 RELATED PART! 9 PAGE 943 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (77) NOTE 7 OIL AND GAS INFORM (78) NOTE 7 OIL AND GAS INFORM (79)!11 PAGE 945 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (31)!31 2000 1 PAGE 952 PARKER PARSLPARKER PARSLEY 89A LP ITEM 6 SELECTED FINANCIAL (17)INDEX TO FINANCIAL STATE (14)Balance Sheet (32)Income Statement (33) STATEMENTS OF PARTNERS CA (32)Cash Flows (33)NOTE 4 INCOME TAXES (17)! NOTE 5 OIL AND GAS PRODUC (64)! NOTE 5 OIL AND GAS PRODUC (65)! 16 PAGE 969 NOTE 6 RELATED PAR! 16 PAGE 969 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (80) NOTE 7 OIL AND GAS INFORM (81) NOTE 7 OIL AND GAS INFORM (82) NOTE 7 OIL AND GAS INFORM (83)! 18 PAGE 971 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (17)Beneficial Ownership (17)PARKER PARSLEY 89A LP (1)INDEX TO EXHIBITS (15)SELECTED FINANCIAL DATA (32) SUPPLEMENTAL INFORMATION (29)Balance Sheet (33)Income Statement (34) STATEMENTS OF PARTNERS CA (33)Cash Flows (34) 8 PAGE 991 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (66)! NOTE 5 OIL AND GAS PRODUC (67)! 9 PAGE 992 NOTE 6 RELATED PART! 9 PAGE 992 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (84) NOTE 7 OIL AND GAS INFORM (85) NOTE 7 OIL AND GAS INFORM (86)! 11 PAGE 994 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (33)!31 2000 1 PAGE 1001 PARKER PARSBalance Sheet (34)Income Statement (35) STATEMENTS OF PARTNERS CA (34)Cash Flows (35)!8 PAGE 1010 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (68)! NOTE 5 OIL AND GAS PRODUC (69)! 9 PAGE 1011 NOTE 6 RELATED PAR! 9 PAGE 1011 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (87) NOTE 7 OIL AND GAS INFORM (88) NOTE 7 OIL AND GAS INFORM (89)!11 PAGE 1013 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (34) SUPPLEMENTAL INFORMATION (30)Balance Sheet (35)Income Statement (36) STATEMENTS OF PARTNERS CA (35)Cash Flows (36)!8 PAGE 1029 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (70)! NOTE 5 OIL AND GAS PRODUC (71)! 9 PAGE 1030 NOTE 6 RELATED PAR! 9 PAGE 1030 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (90) NOTE 7 OIL AND GAS INFORM (91) NOTE 7 OIL AND GAS INFORM (92)! 11 PAGE 1032 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (35) SUPPLEMENTAL INFORMATION (31)Balance Sheet (36)Income Statement (37) STATEMENTS OF PARTNERS CA (36)Cash Flows (37)!8 PAGE 1048 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (72)! NOTE 5 OIL AND GAS PRODUC (73)! 9 PAGE 1049 NOTE 6 RELATED PAR! 9 PAGE 1049 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (93) NOTE 7 OIL AND GAS INFORM (94) NOTE 7 OIL AND GAS INFORM (95)! 11 PAGE 1051 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (36)!31 2000 1 PAGE 1058 PARKER PARSPARKER PARSLEY 90A LP ITEM 6 SELECTED FINANCIAL (18)INDEX TO FINANCIAL STATE (15)Balance Sheet (37)Income Statement (38) STATEMENTS OF PARTNERS CA (37)Cash Flows (38)!15 PAGE 1074 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (74)! NOTE 5 OIL AND GAS PRODUC (75)! NOTE 6 RELATED PARTY TRAN (10)! NOTE 6 RELATED PARTY TRAN (11) NOTE 7 OIL AND GAS INFORM (96) NOTE 7 OIL AND GAS INFORM (97)! 18 PAGE 1077 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (18)Beneficial Ownership (18)PARKER PARSLEY 90A LP (1)INDEX TO EXHIBITS (16)SELECTED FINANCIAL DATA (37) SUPPLEMENTAL INFORMATION (32)PARKER PARSLEY 90B CONV LP ITEM 6 SELECTED FINANCIAL (19)INDEX TO FINANCIAL STATE (16)Balance Sheet (38)Income Statement (39) STATEMENTS OF PARTNERS CA (38)Cash Flows (39)!16 PAGE 1105 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (76)! NOTE 5 OIL AND GAS PRODUC (77)! NOTE 6 RELATED PARTY TRAN (12)! NOTE 6 RELATED PARTY TRAN (13) NOTE 7 OIL AND GAS INFORM (98) NOTE 7 OIL AND GAS INFORM (99) NOTE 7 OIL AND GAS INFOR (100)! 19 PAGE 1108 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (19)Beneficial Ownership (19) PARKER PARSLEY 90B CONV LP (1)INDEX TO EXHIBITS (17)SELECTED FINANCIAL DATA (38)!31 2000 1 PAGE 1119 PARKER PARSPARKER PARSLEY 90B LP ITEM 6 SELECTED FINANCIAL (20)INDEX TO FINANCIAL STATE (17)Balance Sheet (39)Income Statement (40) STATEMENTS OF PARTNERS CA (39)Cash Flows (40)!16 PAGE 1136 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (78)! NOTE 5 OIL AND GAS PRODUC (79)! NOTE 6 RELATED PARTY TRAN (14)! NOTE 6 RELATED PARTY TRAN (15) NOTE 7 OIL AND GAS INFOR (101) NOTE 7 OIL AND GAS INFOR (102) NOTE 7 OIL AND GAS INFOR (103)! 19 PAGE 1139 NOTE 8 MAJOR CUS!ITEM 10 DIRECTORS AND EXEC (20)Beneficial Ownership (20)PARKER PARSLEY 90B LP (1)INDEX TO EXHIBITS (18)SELECTED FINANCIAL DATA (39) SUPPLEMENTAL INFORMATION (33)PARKER PARSLEY 90C CONV LP ITEM 6 SELECTED FINANCIAL (21)INDEX TO FINANCIAL STATE (18)Balance Sheet (40)Income Statement (41) STATEMENTS OF PARTNERS CA (40)Cash Flows (41)!15 PAGE 1166 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (80)! NOTE 5 OIL AND GAS PRODUC (81)! NOTE 6 RELATED PARTY TRAN (16)! NOTE 6 RELATED PARTY TRAN (17) NOTE 7 OIL AND GAS INFOR (104) NOTE 7 OIL AND GAS INFOR (105) NOTE 7 OIL AND GAS INFOR (106)! 18 PAGE 1169 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (21)Beneficial Ownership (21) PARKER PARSLEY 90C CONV LP (1)INDEX TO EXHIBITS (19)SELECTED FINANCIAL DATA (40)!31 2000 1 PAGE 1180 PARKER PARSPARKER PARSLEY 90C LP ITEM 6 SELECTED FINANCIAL (22)INDEX TO FINANCIAL STATE (19)Balance Sheet (41)Income Statement (42) STATEMENTS OF PARTNERS CA (41)Cash Flows (42)!15 PAGE 1196 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (82)! NOTE 5 OIL AND GAS PRODUC (83)! NOTE 6 RELATED PARTY TRAN (18)! NOTE 6 RELATED PARTY TRAN (19) NOTE 7 OIL AND GAS INFOR (107) NOTE 7 OIL AND GAS INFOR (108) NOTE 7 OIL AND GAS INFOR (109)! 18 PAGE 1199 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (22)Beneficial Ownership (22)PARKER PARSLEY 90C LP (1)INDEX TO EXHIBITS (20)SELECTED FINANCIAL DATA (41) SUPPLEMENTAL INFORMATION (34)Balance Sheet (42)Income Statement (43) STATEMENTS OF PARTNERS CA (42)Cash Flows (43)!8 PAGE 1219 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (84)! NOTE 5 OIL AND GAS PRODUC (85)! 9 PAGE 1220 NOTE 6 RELATED PAR! 9 PAGE 1220 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (110) NOTE 7 OIL AND GAS INFOR (111) NOTE 7 OIL AND GAS INFOR (112)! 11 PAGE 1222 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (42) SUPPLEMENTAL INFORMATION (35)Balance Sheet (43)Income Statement (44) STATEMENTS OF PARTNERS CA (43)Cash Flows (44)!8 PAGE 1238 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (86)! NOTE 5 OIL AND GAS PRODUC (87)! 9 PAGE 1239 NOTE 6 RELATED PAR! 9 PAGE 1239 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (113) NOTE 7 OIL AND GAS INFOR (114) NOTE 7 OIL AND GAS INFOR (115)! 11 PAGE 1241 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (43)!31 2000 1 PAGE 1248 PARKER PARSPARKER PARSLEY 91A LP ITEM 6 SELECTED FINANCIAL (23)INDEX TO FINANCIAL STATE (20)Balance Sheet (44)Income Statement (45) STATEMENTS OF PARTNERS CA (44)Cash Flows (45)!15 PAGE 1264 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (88)! NOTE 5 OIL AND GAS PRODUC (89)! NOTE 6 RELATED PARTY TRAN (20)! NOTE 6 RELATED PARTY TRAN (21) NOTE 7 OIL AND GAS INFOR (116) NOTE 7 OIL AND GAS INFOR (117) NOTE 7 OIL AND GAS INFOR (118)! 18 PAGE 1267 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (23)Beneficial Ownership (23)PARKER PARSLEY 91A LP (1)INDEX TO EXHIBITS (21)SELECTED FINANCIAL DATA (44)!31 2000 1 PAGE 1278 PARKER PARSPARKER PARSLEY 91B LP ITEM 6 SELECTED FINANCIAL (24)INDEX TO FINANCIAL STATE (21)Balance Sheet (45)Income Statement (46) STATEMENTS OF PARTNERS CA (45)Cash Flows (46)!15 PAGE 1294 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (90)! NOTE 5 OIL AND GAS PRODUC (91)! NOTE 6 RELATED PARTY TRAN (22)! NOTE 6 RELATED PARTY TRAN (23) NOTE 7 OIL AND GAS INFOR (119) NOTE 7 OIL AND GAS INFOR (120) NOTE 7 OIL AND GAS INFOR (121)! 18 PAGE 1297 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (24)Beneficial Ownership (24)PARKER PARSLEY 91B LP (1)INDEX TO EXHIBITS (22)SELECTED FINANCIAL DATA (45)POWER OF ATTORNEYPOWER OF ATTORNEY (1)POWER OF ATTORNEY (2)POWER OF ATTORNEY (3)POWER OF ATTORNEY (4)POWER OF ATTORNEY (5)POWER OF ATTORNEY (6)POWER OF ATTORNEY (7)!2001 THE BOARD OF DIRECTORS REC!2001 THE BOARD OF DIRECTORS (1)!2001 THE BOARD OF DIRECTORS (2)PAGE 2U } %} I"}      $PIONEER NATURAL RESOURCES CO S-4 04/17/2001kc================================================================================ SECURITIES AND EXC DELAWARE 1311  75-2702753  ' (State or Other Jurisdiction of$ (Primary standard industrial (I.R.S. Employer' Incorporation or Organization)#classification code number)Identification No.)$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/*Oh8, G=PF0*8X> @ l  L dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/?? SECURITIES AND EXCTO BE HELD ON 2001TABLE OF CONTENTSPAGE 7 LIST OF APPENDICES!LIMITED PARTNER INVESTMENT REPA!LIMITED PARTNER INVESTMENT (1) 5 PAGE 15 NYMEX FUTURES PRICES!EXAMPLE CALCULATION OF MERGER VIncome StatementIncome Statement (1)AT DECEMBER 31 2000!15 PAGE 25 COMPARATIVE PER SHAR!25 PAGE 35 REASONS FOR THE MERGFAIRNESS OPINIONFAIRNESS OPINION (1)!LEGAL OPINION FOR LIMITED PARTN!LEGAL OPINION FOR LIMITED P (1)!NONMANAGING GENERAL PARTNERS OF!49 PAGE 59 PAYMENT OF EXPENSES !58 PAGE 68 COMPARATIVE PER SHAR!60 PAGE 70 OWNERSHIP OF PARTNER PIONEER PIONEER USATHE DRILLING PARTNERSHIPSTHE DRILLING PARTNERSHIPS (1)THE INCOME PARTNERSHIPS INTERESTSINTERESTS (1)INTERESTS (2)INTERESTS (3)INTERESTS (4)INTERESTS (5)!WHERE YOU CAN FIND MORE INFORMAAS OF DECEMBER 31 2000YEAR ENDED DECEMBER 31 2000!QUANTITIES OF OIL AND GAS RESER!STANDARDIZED MEASURE OF DISCOUN CASH FLOWSAS OF MARCH 31 2001AS OF MARCH 31 2001 (1)AS OF MARCH 31 2001 (2)AS OF MARCH 31 2001 (3)AS OF MARCH 31 2001 (4)AS OF MARCH 31 2001 (5)!FROM INCEPTION THROUGH MARCH 31!ANNUAL REPURCHASE PRICES AND AGOF EACH PARTNERSHIP!FOR THE THREE MONTHS ENDED MARCAS OF DECEMBER 31 2000 (1)AS OF MARCH 31 2001 (6)!THE YEARS ENDED DECEMBER 31 200AS OF DECEMBER 31 2000 (2)DECEMBER 31 2000 AND 1999EFFECTIVE DECEMBER 31 2000 EFFECTIVE DECEMBER 31 2000 (1) RECITALS RECITALS (1) SUPPLEMENTAL INFORMATION TABLEBalance SheetIncome Statement (2) STATEMENTS OF PARTNERS CAPITALCash Flows (1)NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCING A! NOTE 5 OIL AND GAS PRODUCI (1)! NOTE 6 RELATED PARTY TRANSACTI! NOTE 6 RELATED PARTY TRANS (1)! NOTE 7 OIL AND GAS INFORMATION! NOTE 7 OIL AND GAS INFORMA (1)! NOTE 7 OIL AND GAS INFORMA (2)!11 PAGE 163 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA SUPPLEMENTAL INFORMATION T (1)Balance Sheet (1)Income Statement (3) STATEMENTS OF PARTNERS CAP (1)Cash Flows (2)NOTE 4 INCOME TAXES (1)! NOTE 5 OIL AND GAS PRODUCI (2)! NOTE 5 OIL AND GAS PRODUCI (3)! 9 PAGE 180 NOTE 6 RELATED PAR! 9 PAGE 180 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORMA (3)! NOTE 7 OIL AND GAS INFORMA (4)! NOTE 7 OIL AND GAS INFORMA (5)!11 PAGE 182 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (1) SUPPLEMENTAL INFORMATION T (2) ITEM 6 SELECTED FINANCIAL DATAINDEX TO FINANCIAL STATEMENTSBalance Sheet (2)Income Statement (4) STATEMENTS OF PARTNERS CAP (2)Cash Flows (3)!15 PAGE 205 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCI (4)! NOTE 5 OIL AND GAS PRODUCI (5)! NOTE 6 RELATED PARTY TRANS (2)! NOTE 6 RELATED PARTY TRANS (3)! NOTE 7 OIL AND GAS INFORMA (6)! NOTE 7 OIL AND GAS INFORMA (7)! NOTE 7 OIL AND GAS INFORMA (8)! NOTE 7 OIL AND GAS INFORMA (9)! NOTE 7 OIL AND GAS INFORM (10)! 18 PAGE 208 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECUTIVEBeneficial OwnershipPARKER PARSLEY 82I LTDINDEX TO EXHIBITSSELECTED FINANCIAL DATA (2) SUPPLEMENTAL INFORMATION T (3) ITEM 6 SELECTED FINANCIAL (1)INDEX TO FINANCIAL STATEM (1)Balance Sheet (3)Income Statement (5) STATEMENTS OF PARTNERS CAP (3)Cash Flows (4)NOTE 4 INCOME TAXES (2)! NOTE 5 OIL AND GAS PRODUCI (6)! NOTE 5 OIL AND GAS PRODUCI (7)! 16 PAGE 236 NOTE 6 RELATED PAR! 16 PAGE 236 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (11)! NOTE 7 OIL AND GAS INFORM (12)! NOTE 7 OIL AND GAS INFORM (13)!18 PAGE 238 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (1)Beneficial Ownership (1)PARKER PARSLEY 82II LTDINDEX TO EXHIBITS (1)SELECTED FINANCIAL DATA (3) SUPPLEMENTAL INFORMATION T (4)Balance Sheet (4)Income Statement (6) STATEMENTS OF PARTNERS CAP (4)Cash Flows (5)NOTE 4 INCOME TAXES (3)! NOTE 5 OIL AND GAS PRODUCI (8)! NOTE 5 OIL AND GAS PRODUCI (9)! 9 PAGE 259 NOTE 6 RELATED PART! 9 PAGE 259 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (14)! NOTE 7 OIL AND GAS INFORM (15)! NOTE 7 OIL AND GAS INFORM (16)!11 PAGE 261 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (4) SUPPLEMENTAL INFORMATION T (5)PARKER PARSLEY 83A LTD ITEM 6 SELECTED FINANCIAL (2)INDEX TO FINANCIAL STATEM (2)Balance Sheet (5)Income Statement (7) STATEMENTS OF PARTNERS CAP (5)Cash Flows (6)NOTE 4 INCOME TAXES (4)! NOTE 5 OIL AND GAS PRODUC (10)! NOTE 5 OIL AND GAS PRODUC (11)! 16 PAGE 285 NOTE 6 RELATED PAR! 16 PAGE 285 NOTE 6 RELATED (1)!NOTE 7 OIL AND GAS INFORMATION  NOTE 7 OIL AND GAS INFORMA (1) NOTE 7 OIL AND GAS INFORMA (2)! 18 PAGE 287 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECU (2)Beneficial Ownership (2)PARKER PARSLEY 83A LTD (1)INDEX TO EXHIBITS (2)SELECTED FINANCIAL DATA (5) SUPPLEMENTAL INFORMATION T (6)PARKER PARSLEY 83B LTD ITEM 6 SELECTED FINANCIAL (3)INDEX TO FINANCIAL STATEM (3)Balance Sheet (6)Income Statement (8) STATEMENTS OF PARTNERS CAP (6)Cash Flows (7)NOTE 4 INCOME TAXES (5)! NOTE 5 OIL AND GAS PRODUC (12)! NOTE 5 OIL AND GAS PRODUC (13)! 16 PAGE 315 NOTE 6 RELATED PAR! 16 PAGE 315 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (3) NOTE 7 OIL AND GAS INFORMA (4) NOTE 7 OIL AND GAS INFORMA (5)!18 PAGE 317 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (3)Beneficial Ownership (3)PARKER PARSLEY 83B LTD (1)INDEX TO EXHIBITS (3)SELECTED FINANCIAL DATA (6) SUPPLEMENTAL INFORMATION T (7)PARKER PARSLEY 84A LTD ITEM 6 SELECTED FINANCIAL (4)INDEX TO FINANCIAL STATEM (4)Balance Sheet (7)Income Statement (9) STATEMENTS OF PARTNERS CAP (7)Cash Flows (8)!15 PAGE 344 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (14)! NOTE 5 OIL AND GAS PRODUC (15)! 16 PAGE 345 NOTE 6 RELATED PAR! 16 PAGE 345 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (6) NOTE 7 OIL AND GAS INFORMA (7) NOTE 7 OIL AND GAS INFORMA (8)!18 PAGE 347 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (4)Beneficial Ownership (4)PARKER PARSLEY 84A LTD (1)INDEX TO EXHIBITS (4)SELECTED FINANCIAL DATA (7) SUPPLEMENTAL INFORMATION T (8)PARKER PARSLEY 85A LTD ITEM 6 SELECTED FINANCIAL (5)INDEX TO FINANCIAL STATEM (5)Balance Sheet (8)Income Statement (10) STATEMENTS OF PARTNERS CAP (8)Cash Flows (9)NOTE 4 INCOME TAXES (6)! NOTE 5 OIL AND GAS PRODUC (16)! NOTE 5 OIL AND GAS PRODUC (17)! 16 PAGE 375 NOTE 6 RELATED PAR! 16 PAGE 375 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (9) NOTE 7 OIL AND GAS INFORM (10) NOTE 7 OIL AND GAS INFORM (11)!18 PAGE 377 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (5)Beneficial Ownership (5)PARKER PARSLEY 85A LTD (1)INDEX TO EXHIBITS (5)SELECTED FINANCIAL DATA (8) SUPPLEMENTAL INFORMATION T (9)PARKER PARSLEY 85B LTD ITEM 6 SELECTED FINANCIAL (6)!7 PAGE 396 ITEM 8 FINANCIAL STABalance Sheet (9) STATEMENTS OF PARTNERS CAP (9)Cash Flows (10)!15 PAGE 404 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (18)! NOTE 5 OIL AND GAS PRODUC (19)! 16 PAGE 405 NOTE 6 RELATED PAR! 16 PAGE 405 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (12) NOTE 7 OIL AND GAS INFORM (13) NOTE 7 OIL AND GAS INFORM (14)!18 PAGE 407 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (6)Beneficial Ownership (6)PARKER PARSLEY 85B LTD (1)INDEX TO EXHIBITS (6)SELECTED FINANCIAL DATA (9) SUPPLEMENTAL INFORMATION (10)Balance Sheet (10)Income Statement (11) STATEMENTS OF PARTNERS CA (10)Cash Flows (11)NOTE 4 INCOME TAXES (7)! NOTE 5 OIL AND GAS PRODUC (20)! NOTE 5 OIL AND GAS PRODUC (21)! 9 PAGE 428 NOTE 6 RELATED PART! 9 PAGE 428 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (15) NOTE 7 OIL AND GAS INFORM (16) NOTE 7 OIL AND GAS INFORM (17)! 11 PAGE 430 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (10) SUPPLEMENTAL INFORMATION (11)Balance Sheet (11)Income Statement (12) STATEMENTS OF PARTNERS CA (11)Cash Flows (12) 8 PAGE 446 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (22)! NOTE 5 OIL AND GAS PRODUC (23)! 9 PAGE 447 NOTE 6 RELATED PART! 9 PAGE 447 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (18) NOTE 7 OIL AND GAS INFORM (19) NOTE 7 OIL AND GAS INFORM (20)! 11 PAGE 449 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (11) SUPPLEMENTAL INFORMATION (12)PARKER PARSLEY 86A LTD ITEM 6 SELECTED FINANCIAL (7)INDEX TO FINANCIAL STATEM (6)Balance Sheet (12)Income Statement (13) STATEMENTS OF PARTNERS CA (12)Cash Flows (13)NOTE 4 INCOME TAXES (8)! NOTE 5 OIL AND GAS PRODUC (24)! NOTE 5 OIL AND GAS PRODUC (25)! 16 PAGE 473 NOTE 6 RELATED PAR! 16 PAGE 473 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (21) NOTE 7 OIL AND GAS INFORM (22) NOTE 7 OIL AND GAS INFORM (23)!18 PAGE 475 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (7)Beneficial Ownership (7)PARKER PARSLEY 86A LTD (1)INDEX TO EXHIBITS (7)SELECTED FINANCIAL DATA (12) SUPPLEMENTAL INFORMATION (13)PARKER PARSLEY 86B LTD ITEM 6 SELECTED FINANCIAL (8)INDEX TO FINANCIAL STATEM (7)Balance Sheet (13)Income Statement (14) STATEMENTS OF PARTNERS CA (13)Cash Flows (14)!16 PAGE 503 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (26)! NOTE 5 OIL AND GAS PRODUC (27)! NOTE 6 RELATED PARTY TRANS (4)! NOTE 6 RELATED PARTY TRANS (5) NOTE 7 OIL AND GAS INFORM (24) NOTE 7 OIL AND GAS INFORM (25) NOTE 7 OIL AND GAS INFORM (26)!19 PAGE 506 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (8)Beneficial Ownership (8)PARKER PARSLEY 86B LTD (1)INDEX TO EXHIBITS (8)SELECTED FINANCIAL DATA (13) SUPPLEMENTAL INFORMATION (14) ITEM 6 SELECTED FINANCIAL (9)!7 PAGE 525 ITEM 8 FINANCIAL STABalance Sheet (14)Income Statement (15) STATEMENTS OF PARTNERS CA (14)Cash Flows (15)NOTE 4 INCOME TAXES (9)! NOTE 5 OIL AND GAS PRODUC (28)! NOTE 5 OIL AND GAS PRODUC (29)! 16 PAGE 534 NOTE 6 RELATED PAR! 16 PAGE 534 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (27) NOTE 7 OIL AND GAS INFORM (28) NOTE 7 OIL AND GAS INFORM (29)!18 PAGE 536 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (9)Beneficial Ownership (9)PARKER PARSLEY 86C LTDSELECTED FINANCIAL DATA (14) SUPPLEMENTAL INFORMATION (15)Balance Sheet (15)Income Statement (16) STATEMENTS OF PARTNERS CA (15)Cash Flows (16) 8 PAGE 556 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (30)! NOTE 5 OIL AND GAS PRODUC (31)! NOTE 6 RELATED PARTY TRANS (6)! NOTE 6 RELATED PARTY TRANS (7) NOTE 7 OIL AND GAS INFORM (30) NOTE 7 OIL AND GAS INFORM (31) NOTE 7 OIL AND GAS INFORM (32)! 11 PAGE 559 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (15) SUPPLEMENTAL INFORMATION (16)Balance Sheet (16)Income Statement (17) STATEMENTS OF PARTNERS CA (16)Cash Flows (17)NOTE 4 INCOME TAXES (10)! NOTE 5 OIL AND GAS PRODUC (32)! NOTE 5 OIL AND GAS PRODUC (33)! 9 PAGE 576 NOTE 6 RELATED PART! 9 PAGE 576 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (33) NOTE 7 OIL AND GAS INFORM (34) NOTE 7 OIL AND GAS INFORM (35)!11 PAGE 578 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (16) SUPPLEMENTAL INFORMATION (17) ITEM 6 SELECTED FINANCIAL (10)!8 PAGE 594 ITEM 8 FINANCIAL STABalance Sheet (17)Income Statement (18) STATEMENTS OF PARTNERS CA (17)Cash Flows (18)NOTE 4 INCOME TAXES (11)! NOTE 5 OIL AND GAS PRODUC (34)! NOTE 5 OIL AND GAS PRODUC (35)! 17 PAGE 603 NOTE 6 RELATED PAR! 17 PAGE 603 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (36) NOTE 7 OIL AND GAS INFORM (37) NOTE 7 OIL AND GAS INFORM (38)! 19 PAGE 605 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (10)Beneficial Ownership (10)PARKER PARSLEY 87A LTDSELECTED FINANCIAL DATA (17) SUPPLEMENTAL INFORMATION (18)Balance Sheet (18)Income Statement (19) STATEMENTS OF PARTNERS CA (18)Cash Flows (19) 8 PAGE 625 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (36)! NOTE 5 OIL AND GAS PRODUC (37)! 9 PAGE 626 NOTE 6 RELATED PART! 9 PAGE 626 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (39) NOTE 7 OIL AND GAS INFORM (40) NOTE 7 OIL AND GAS INFORM (41)! 11 PAGE 628 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (18) SUPPLEMENTAL INFORMATION (19) ITEM 6 SELECTED FINANCIAL (11)INDEX TO FINANCIAL STATEM (8)Balance Sheet (19)Income Statement (20) STATEMENTS OF PARTNERS CA (19)Cash Flows (20)NOTE 4 INCOME TAXES (12)! NOTE 5 OIL AND GAS PRODUC (38)! NOTE 5 OIL AND GAS PRODUC (39)! 17 PAGE 653 NOTE 6 RELATED PAR! 17 PAGE 653 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (42) NOTE 7 OIL AND GAS INFORM (43) NOTE 7 OIL AND GAS INFORM (44)! 19 PAGE 655 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (11)Beneficial Ownership (11)PARKER PARSLEY 87B LTDINDEX TO EXHIBITS (9)SELECTED FINANCIAL DATA (19) SUPPLEMENTAL INFORMATION (20) ITEM 6 SELECTED FINANCIAL (12)INDEX TO FINANCIAL STATEM (9)Balance Sheet (20)Income Statement (21) STATEMENTS OF PARTNERS CA (20)Cash Flows (21)!16 PAGE 683 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (40)! NOTE 5 OIL AND GAS PRODUC (41)! NOTE 6 RELATED PARTY TRANS (8)! NOTE 6 RELATED PARTY TRANS (9) NOTE 7 OIL AND GAS INFORM (45) NOTE 7 OIL AND GAS INFORM (46) NOTE 7 OIL AND GAS INFORM (47)!19 PAGE 686 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (12)Beneficial Ownership (12)PROPERTIES 87A LTDINDEX TO EXHIBITS (10)SELECTED FINANCIAL DATA (20) SUPPLEMENTAL INFORMATION (21) ITEM 6 SELECTED FINANCIAL (13)INDEX TO FINANCIAL STATE (10)Balance Sheet (21)Income Statement (22) STATEMENTS OF PARTNERS CA (21)Cash Flows (22)!16 PAGE 714 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (42)! NOTE 5 OIL AND GAS PRODUC (43)! 17 PAGE 715 NOTE 6 RELATED PAR! 17 PAGE 715 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (48) NOTE 7 OIL AND GAS INFORM (49) NOTE 7 OIL AND GAS INFORM (50)! 19 PAGE 717 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (13)Beneficial Ownership (13)PROPERTIES 87B LTDINDEX TO EXHIBITS (11)SELECTED FINANCIAL DATA (21) SUPPLEMENTAL INFORMATION (22)Balance Sheet (22)Income Statement (23) STATEMENTS OF PARTNERS CA (22)Cash Flows (23) 8 PAGE 737 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (44)! NOTE 5 OIL AND GAS PRODUC (45)! 9 PAGE 738 NOTE 6 RELATED PART! 9 PAGE 738 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (51) NOTE 7 OIL AND GAS INFORM (52) NOTE 7 OIL AND GAS INFORM (53)! 11 PAGE 740 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (22) SUPPLEMENTAL INFORMATION (23)Balance Sheet (23)Income Statement (24) STATEMENTS OF PARTNERS CA (23)Cash Flows (24) 8 PAGE 756 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (46)! NOTE 5 OIL AND GAS PRODUC (47)! 9 PAGE 757 NOTE 6 RELATED PART! 9 PAGE 757 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (54) NOTE 7 OIL AND GAS INFORM (55) NOTE 7 OIL AND GAS INFORM (56)! 11 PAGE 759 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (23)!31 2000 1 PAGE 766 PARKER PARSLPARKER PARSLEY 88A LP ITEM 6 SELECTED FINANCIAL (14)INDEX TO FINANCIAL STATE (11)Balance Sheet (24)Income Statement (25) STATEMENTS OF PARTNERS CA (24)Cash Flows (25)NOTE 4 INCOME TAXES (13)! NOTE 5 OIL AND GAS PRODUC (48)! NOTE 5 OIL AND GAS PRODUC (49)! 16 PAGE 783 NOTE 6 RELATED PAR! 16 PAGE 783 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (57) NOTE 7 OIL AND GAS INFORM (58) NOTE 7 OIL AND GAS INFORM (59)! 18 PAGE 785 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (14)Beneficial Ownership (14)PARKER PARSLEY 88A LP (1)INDEX TO EXHIBITS (12)SELECTED FINANCIAL DATA (24) SUPPLEMENTAL INFORMATION (24)Balance Sheet (25)Income Statement (26) STATEMENTS OF PARTNERS CA (25)Cash Flows (26) 8 PAGE 805 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (50)! NOTE 5 OIL AND GAS PRODUC (51)! 9 PAGE 806 NOTE 6 RELATED PART! 9 PAGE 806 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (60) NOTE 7 OIL AND GAS INFORM (61) NOTE 7 OIL AND GAS INFORM (62)! 11 PAGE 808 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (25)!31 2000 1 PAGE 815 PARKER PARSLPARKER PARSLEY 88B LP ITEM 6 SELECTED FINANCIAL (15)INDEX TO FINANCIAL STATE (12)Balance Sheet (26)Income Statement (27) STATEMENTS OF PARTNERS CA (26)Cash Flows (27)!16 PAGE 832 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (52)! NOTE 5 OIL AND GAS PRODUC (53)! 17 PAGE 833 NOTE 6 RELATED PAR! 17 PAGE 833 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (63) NOTE 7 OIL AND GAS INFORM (64) NOTE 7 OIL AND GAS INFORM (65)! 19 PAGE 835 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (15)Beneficial Ownership (15)PARKER PARSLEY 88B LP (1)INDEX TO EXHIBITS (13)SELECTED FINANCIAL DATA (26) SUPPLEMENTAL INFORMATION (25)Balance Sheet (27)Income Statement (28) STATEMENTS OF PARTNERS CA (27)Cash Flows (28) 8 PAGE 855 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (54)! NOTE 5 OIL AND GAS PRODUC (55)! 9 PAGE 856 NOTE 6 RELATED PART! 9 PAGE 856 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (66) NOTE 7 OIL AND GAS INFORM (67) NOTE 7 OIL AND GAS INFORM (68)! 11 PAGE 858 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (27)!31 2000 1 PAGE 865 PARKER PARSLBalance Sheet (28)Income Statement (29) STATEMENTS OF PARTNERS CA (28)Cash Flows (29) 8 PAGE 874 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (56)! NOTE 5 OIL AND GAS PRODUC (57)! 9 PAGE 875 NOTE 6 RELATED PART! 9 PAGE 875 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (69) NOTE 7 OIL AND GAS INFORM (70) NOTE 7 OIL AND GAS INFORM (71)! 11 PAGE 877 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (28) SUPPLEMENTAL INFORMATION (26)!PARKER PARSLEY PRODUCING PROPER ITEM 6 SELECTED FINANCIAL (16)INDEX TO FINANCIAL STATE (13)Balance Sheet (29)Income Statement (30) STATEMENTS OF PARTNERS CA (29)Cash Flows (30)NOTE 4 INCOME TAXES (14)! NOTE 5 OIL AND GAS PRODUC (58)! NOTE 5 OIL AND GAS PRODUC (59)! 16 PAGE 901 NOTE 6 RELATED PAR! 16 PAGE 901 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (72) NOTE 7 OIL AND GAS INFORM (73)!18 PAGE 903 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (16)Beneficial Ownership (16)PROPERTIES 88A LPINDEX TO EXHIBITS (14)SELECTED FINANCIAL DATA (29) SUPPLEMENTAL INFORMATION (27)Balance Sheet (30)Income Statement (31) STATEMENTS OF PARTNERS CA (30)Cash Flows (31)NOTE 4 INCOME TAXES (15)! NOTE 5 OIL AND GAS PRODUC (60)! NOTE 5 OIL AND GAS PRODUC (61)! 9 PAGE 924 NOTE 6 RELATED PART! 9 PAGE 924 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (74) NOTE 7 OIL AND GAS INFORM (75) NOTE 7 OIL AND GAS INFORM (76)! 11 PAGE 926 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (30) SUPPLEMENTAL INFORMATION (28)Balance Sheet (31)Income Statement (32) STATEMENTS OF PARTNERS CA (31)Cash Flows (32)NOTE 4 INCOME TAXES (16)! NOTE 5 OIL AND GAS PRODUC (62)! NOTE 5 OIL AND GAS PRODUC (63)! 9 PAGE 943 NOTE 6 RELATED PART! 9 PAGE 943 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (77) NOTE 7 OIL AND GAS INFORM (78) NOTE 7 OIL AND GAS INFORM (79)!11 PAGE 945 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (31)!31 2000 1 PAGE 952 PARKER PARSLPARKER PARSLEY 89A LP ITEM 6 SELECTED FINANCIAL (17)INDEX TO FINANCIAL STATE (14)Balance Sheet (32)Income Statement (33) STATEMENTS OF PARTNERS CA (32)Cash Flows (33)NOTE 4 INCOME TAXES (17)! NOTE 5 OIL AND GAS PRODUC (64)! NOTE 5 OIL AND GAS PRODUC (65)! 16 PAGE 969 NOTE 6 RELATED PAR! 16 PAGE 969 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (80) NOTE 7 OIL AND GAS INFORM (81) NOTE 7 OIL AND GAS INFORM (82) NOTE 7 OIL AND GAS INFORM (83)! 18 PAGE 971 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (17)Beneficial Ownership (17)PARKER PARSLEY 89A LP (1)INDEX TO EXHIBITS (15)SELECTED FINANCIAL DATA (32) SUPPLEMENTAL INFORMATION (29)Balance Sheet (33)Income Statement (34) STATEMENTS OF PARTNERS CA (33)Cash Flows (34) 8 PAGE 991 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (66)! NOTE 5 OIL AND GAS PRODUC (67)! 9 PAGE 992 NOTE 6 RELATED PART! 9 PAGE 992 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (84) NOTE 7 OIL AND GAS INFORM (85) NOTE 7 OIL AND GAS INFORM (86)! 11 PAGE 994 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (33)!31 2000 1 PAGE 1001 PARKER PARSBalance Sheet (34)Income Statement (35) STATEMENTS OF PARTNERS CA (34)Cash Flows (35)!8 PAGE 1010 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (68)! NOTE 5 OIL AND GAS PRODUC (69)! 9 PAGE 1011 NOTE 6 RELATED PAR! 9 PAGE 1011 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (87) NOTE 7 OIL AND GAS INFORM (88) NOTE 7 OIL AND GAS INFORM (89)!11 PAGE 1013 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (34) SUPPLEMENTAL INFORMATION (30)Balance Sheet (35)Income Statement (36) STATEMENTS OF PARTNERS CA (35)Cash Flows (36)!8 PAGE 1029 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (70)! NOTE 5 OIL AND GAS PRODUC (71)! 9 PAGE 1030 NOTE 6 RELATED PAR! 9 PAGE 1030 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (90) NOTE 7 OIL AND GAS INFORM (91) NOTE 7 OIL AND GAS INFORM (92)! 11 PAGE 1032 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (35) SUPPLEMENTAL INFORMATION (31)Balance Sheet (36)Income Statement (37) STATEMENTS OF PARTNERS CA (36)Cash Flows (37)!8 PAGE 1048 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (72)! NOTE 5 OIL AND GAS PRODUC (73)! 9 PAGE 1049 NOTE 6 RELATED PAR! 9 PAGE 1049 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (93) NOTE 7 OIL AND GAS INFORM (94) NOTE 7 OIL AND GAS INFORM (95)! 11 PAGE 1051 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (36)!31 2000 1 PAGE 1058 PARKER PARSPARKER PARSLEY 90A LP ITEM 6 SELECTED FINANCIAL (18)INDEX TO FINANCIAL STATE (15)Balance Sheet (37)Income Statement (38) STATEMENTS OF PARTNERS CA (37)Cash Flows (38)!15 PAGE 1074 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (74)! NOTE 5 OIL AND GAS PRODUC (75)! NOTE 6 RELATED PARTY TRAN (10)! NOTE 6 RELATED PARTY TRAN (11) NOTE 7 OIL AND GAS INFORM (96) NOTE 7 OIL AND GAS INFORM (97)! 18 PAGE 1077 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (18)Beneficial Ownership (18)PARKER PARSLEY 90A LP (1)INDEX TO EXHIBITS (16)SELECTED FINANCIAL DATA (37) SUPPLEMENTAL INFORMATION (32)PARKER PARSLEY 90B CONV LP ITEM 6 SELECTED FINANCIAL (19)INDEX TO FINANCIAL STATE (16)Balance Sheet (38)Income Statement (39) STATEMENTS OF PARTNERS CA (38)Cash Flows (39)!16 PAGE 1105 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (76)! NOTE 5 OIL AND GAS PRODUC (77)! NOTE 6 RELATED PARTY TRAN (12)! NOTE 6 RELATED PARTY TRAN (13) NOTE 7 OIL AND GAS INFORM (98) NOTE 7 OIL AND GAS INFORM (99) NOTE 7 OIL AND GAS INFOR (100)! 19 PAGE 1108 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (19)Beneficial Ownership (19) PARKER PARSLEY 90B CONV LP (1)INDEX TO EXHIBITS (17)SELECTED FINANCIAL DATA (38)!31 2000 1 PAGE 1119 PARKER PARSPARKER PARSLEY 90B LP ITEM 6 SELECTED FINANCIAL (20)INDEX TO FINANCIAL STATE (17)Balance Sheet (39)Income Statement (40) STATEMENTS OF PARTNERS CA (39)Cash Flows (40)!16 PAGE 1136 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (78)! NOTE 5 OIL AND GAS PRODUC (79)! NOTE 6 RELATED PARTY TRAN (14)! NOTE 6 RELATED PARTY TRAN (15) NOTE 7 OIL AND GAS INFOR (101) NOTE 7 OIL AND GAS INFOR (102) NOTE 7 OIL AND GAS INFOR (103)! 19 PAGE 1139 NOTE 8 MAJOR CUS!ITEM 10 DIRECTORS AND EXEC (20)Beneficial Ownership (20)PARKER PARSLEY 90B LP (1)INDEX TO EXHIBITS (18)SELECTED FINANCIAL DATA (39) SUPPLEMENTAL INFORMATION (33)PARKER PARSLEY 90C CONV LP ITEM 6 SELECTED FINANCIAL (21)INDEX TO FINANCIAL STATE (18)Balance Sheet (40)Income Statement (41) STATEMENTS OF PARTNERS CA (40)Cash Flows (41)!15 PAGE 1166 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (80)! NOTE 5 OIL AND GAS PRODUC (81)! NOTE 6 RELATED PARTY TRAN (16)! NOTE 6 RELATED PARTY TRAN (17) NOTE 7 OIL AND GAS INFOR (104) NOTE 7 OIL AND GAS INFOR (105) NOTE 7 OIL AND GAS INFOR (106)! 18 PAGE 1169 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (21)Beneficial Ownership (21) PARKER PARSLEY 90C CONV LP (1)INDEX TO EXHIBITS (19)SELECTED FINANCIAL DATA (40)!31 2000 1 PAGE 1180 PARKER PARSPARKER PARSLEY 90C LP ITEM 6 SELECTED FINANCIAL (22)INDEX TO FINANCIAL STATE (19)Balance Sheet (41)Income Statement (42) STATEMENTS OF PARTNERS CA (41)Cash Flows (42)!15 PAGE 1196 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (82)! NOTE 5 OIL AND GAS PRODUC (83)! NOTE 6 RELATED PARTY TRAN (18)! NOTE 6 RELATED PARTY TRAN (19) NOTE 7 OIL AND GAS INFOR (107) NOTE 7 OIL AND GAS INFOR (108) NOTE 7 OIL AND GAS INFOR (109)! 18 PAGE 1199 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (22)Beneficial Ownership (22)PARKER PARSLEY 90C LP (1)INDEX TO EXHIBITS (20)SELECTED FINANCIAL DATA (41) SUPPLEMENTAL INFORMATION (34)Balance Sheet (42)Income Statement (43) STATEMENTS OF PARTNERS CA (42)Cash Flows (43)!8 PAGE 1219 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (84)! NOTE 5 OIL AND GAS PRODUC (85)! 9 PAGE 1220 NOTE 6 RELATED PAR! 9 PAGE 1220 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (110) NOTE 7 OIL AND GAS INFOR (111) NOTE 7 OIL AND GAS INFOR (112)! 11 PAGE 1222 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (42) SUPPLEMENTAL INFORMATION (35)Balance Sheet (43)Income Statement (44) STATEMENTS OF PARTNERS CA (43)Cash Flows (44)!8 PAGE 1238 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (86)! NOTE 5 OIL AND GAS PRODUC (87)! 9 PAGE 1239 NOTE 6 RELATED PAR! 9 PAGE 1239 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (113) NOTE 7 OIL AND GAS INFOR (114) NOTE 7 OIL AND GAS INFOR (115)! 11 PAGE 1241 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (43)!31 2000 1 PAGE 1248 PARKER PARSPARKER PARSLEY 91A LP ITEM 6 SELECTED FINANCIAL (23)INDEX TO FINANCIAL STATE (20)Balance Sheet (44)Income Statement (45) STATEMENTS OF PARTNERS CA (44)Cash Flows (45)!15 PAGE 1264 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (88)! NOTE 5 OIL AND GAS PRODUC (89)! NOTE 6 RELATED PARTY TRAN (20)! NOTE 6 RELATED PARTY TRAN (21) NOTE 7 OIL AND GAS INFOR (116) NOTE 7 OIL AND GAS INFOR (117) NOTE 7 OIL AND GAS INFOR (118)! 18 PAGE 1267 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (23)Beneficial Ownership (23)PARKER PARSLEY 91A LP (1)INDEX TO EXHIBITS (21)SELECTED FINANCIAL DATA (44)!31 2000 1 PAGE 1278 PARKER PARSPARKER PARSLEY 91B LP ITEM 6 SELECTED FINANCIAL (24)INDEX TO FINANCIAL STATE (21)Balance Sheet (45)Income Statement (46) STATEMENTS OF PARTNERS CA (45)Cash Flows (46)!15 PAGE 1294 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (90)! NOTE 5 OIL AND GAS PRODUC (91)! NOTE 6 RELATED PARTY TRAN (22)! NOTE 6 RELATED PARTY TRAN (23) NOTE 7 OIL AND GAS INFOR (119) NOTE 7 OIL AND GAS INFOR (120) NOTE 7 OIL AND GAS INFOR (121)! 18 PAGE 1297 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (24)Beneficial Ownership (24)PARKER PARSLEY 91B LP (1)INDEX TO EXHIBITS (22)SELECTED FINANCIAL DATA (45)POWER OF ATTORNEYPOWER OF ATTORNEY (1)POWER OF ATTORNEY (2)POWER OF ATTORNEY (3)POWER OF ATTORNEY (4)POWER OF ATTORNEY (5)POWER OF ATTORNEY (6)POWER OF ATTORNEY (7)!2001 THE BOARD OF DIRECTORS REC!2001 THE BOARD OF DIRECTORS (1)!2001 THE BOARD OF DIRECTORS (2)PAGE 2U } '} <} a} 0} <     $PIONEER NATURAL RESOURCES CO S-4 04/17/2001'CALCULATION OF REGISTRATION FEE } u=====================================================================================================================   PROPOSED MAXIMUM PROPOSED MAXIMUM  AMOUNT OF TITLE OF EACH CLASS OF  AMOUNT TO BE OFFERING  AGGREGATE  REGISTRATION# SECURITIES TO BE REGISTERED REGISTERED(1) PRICE PER SHARE(2) OFFERING PRICE(2) FEE(2)( Common Stock, 0.01 par value~ j8\(\@~ Lp~ y$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/23dL4w ~B6*=PF0*8X> @ l  &> dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/?? SECURITIES AND EXC!CALCULATION OF REGISTRATION FEETABLE OF CONTENTSPAGE 7 LIST OF APPENDICES!LIMITED PARTNER INVESTMENT REPA!LIMITED PARTNER INVESTMENT (1) 5 PAGE 15 NYMEX FUTURES PRICES!EXAMPLE CALCULATION OF MERGER VIncome StatementIncome Statement (1)AT DECEMBER 31 2000!15 PAGE 25 COMPARATIVE PER SHAR!25 PAGE 35 REASONS FOR THE MERGFAIRNESS OPINIONFAIRNESS OPINION (1)!LEGAL OPINION FOR LIMITED PARTN!LEGAL OPINION FOR LIMITED P (1)!NONMANAGING GENERAL PARTNERS OF!49 PAGE 59 PAYMENT OF EXPENSES !58 PAGE 68 COMPARATIVE PER SHAR!60 PAGE 70 OWNERSHIP OF PARTNER PIONEER PIONEER USATHE DRILLING PARTNERSHIPSTHE DRILLING PARTNERSHIPS (1)THE INCOME PARTNERSHIPS INTERESTSINTERESTS (1)INTERESTS (2)INTERESTS (3)INTERESTS (4)INTERESTS (5)!WHERE YOU CAN FIND MORE INFORMAAS OF DECEMBER 31 2000YEAR ENDED DECEMBER 31 2000!QUANTITIES OF OIL AND GAS RESER!STANDARDIZED MEASURE OF DISCOUN CASH FLOWSAS OF MARCH 31 2001AS OF MARCH 31 2001 (1)AS OF MARCH 31 2001 (2)AS OF MARCH 31 2001 (3)AS OF MARCH 31 2001 (4)AS OF MARCH 31 2001 (5)!FROM INCEPTION THROUGH MARCH 31!ANNUAL REPURCHASE PRICES AND AGOF EACH PARTNERSHIP!FOR THE THREE MONTHS ENDED MARCAS OF DECEMBER 31 2000 (1)AS OF MARCH 31 2001 (6)!THE YEARS ENDED DECEMBER 31 200AS OF DECEMBER 31 2000 (2)DECEMBER 31 2000 AND 1999EFFECTIVE DECEMBER 31 2000 EFFECTIVE DECEMBER 31 2000 (1) RECITALS RECITALS (1) SUPPLEMENTAL INFORMATION TABLEBalance SheetIncome Statement (2) STATEMENTS OF PARTNERS CAPITALCash Flows (1)NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCING A! NOTE 5 OIL AND GAS PRODUCI (1)! NOTE 6 RELATED PARTY TRANSACTI! NOTE 6 RELATED PARTY TRANS (1)! NOTE 7 OIL AND GAS INFORMATION! NOTE 7 OIL AND GAS INFORMA (1)! NOTE 7 OIL AND GAS INFORMA (2)!11 PAGE 163 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA SUPPLEMENTAL INFORMATION T (1)Balance Sheet (1)Income Statement (3) STATEMENTS OF PARTNERS CAP (1)Cash Flows (2)NOTE 4 INCOME TAXES (1)! NOTE 5 OIL AND GAS PRODUCI (2)! NOTE 5 OIL AND GAS PRODUCI (3)! 9 PAGE 180 NOTE 6 RELATED PAR! 9 PAGE 180 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORMA (3)! NOTE 7 OIL AND GAS INFORMA (4)! NOTE 7 OIL AND GAS INFORMA (5)!11 PAGE 182 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (1) SUPPLEMENTAL INFORMATION T (2) ITEM 6 SELECTED FINANCIAL DATAINDEX TO FINANCIAL STATEMENTSBalance Sheet (2)Income Statement (4) STATEMENTS OF PARTNERS CAP (2)Cash Flows (3)!15 PAGE 205 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCI (4)! NOTE 5 OIL AND GAS PRODUCI (5)! NOTE 6 RELATED PARTY TRANS (2)! NOTE 6 RELATED PARTY TRANS (3)! NOTE 7 OIL AND GAS INFORMA (6)! NOTE 7 OIL AND GAS INFORMA (7)! NOTE 7 OIL AND GAS INFORMA (8)! NOTE 7 OIL AND GAS INFORMA (9)! NOTE 7 OIL AND GAS INFORM (10)! 18 PAGE 208 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECUTIVEBeneficial OwnershipPARKER PARSLEY 82I LTDINDEX TO EXHIBITSSELECTED FINANCIAL DATA (2) SUPPLEMENTAL INFORMATION T (3) ITEM 6 SELECTED FINANCIAL (1)INDEX TO FINANCIAL STATEM (1)Balance Sheet (3)Income Statement (5) STATEMENTS OF PARTNERS CAP (3)Cash Flows (4)NOTE 4 INCOME TAXES (2)! NOTE 5 OIL AND GAS PRODUCI (6)! NOTE 5 OIL AND GAS PRODUCI (7)! 16 PAGE 236 NOTE 6 RELATED PAR! 16 PAGE 236 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (11)! NOTE 7 OIL AND GAS INFORM (12)! NOTE 7 OIL AND GAS INFORM (13)!18 PAGE 238 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (1)Beneficial Ownership (1)PARKER PARSLEY 82II LTDINDEX TO EXHIBITS (1)SELECTED FINANCIAL DATA (3) SUPPLEMENTAL INFORMATION T (4)Balance Sheet (4)Income Statement (6) STATEMENTS OF PARTNERS CAP (4)Cash Flows (5)NOTE 4 INCOME TAXES (3)! NOTE 5 OIL AND GAS PRODUCI (8)! NOTE 5 OIL AND GAS PRODUCI (9)! 9 PAGE 259 NOTE 6 RELATED PART! 9 PAGE 259 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (14)! NOTE 7 OIL AND GAS INFORM (15)! NOTE 7 OIL AND GAS INFORM (16)!11 PAGE 261 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (4) SUPPLEMENTAL INFORMATION T (5)PARKER PARSLEY 83A LTD ITEM 6 SELECTED FINANCIAL (2)INDEX TO FINANCIAL STATEM (2)Balance Sheet (5)Income Statement (7) STATEMENTS OF PARTNERS CAP (5)Cash Flows (6)NOTE 4 INCOME TAXES (4)! NOTE 5 OIL AND GAS PRODUC (10)! NOTE 5 OIL AND GAS PRODUC (11)! 16 PAGE 285 NOTE 6 RELATED PAR! 16 PAGE 285 NOTE 6 RELATED (1)!NOTE 7 OIL AND GAS INFORMATION  NOTE 7 OIL AND GAS INFORMA (1) NOTE 7 OIL AND GAS INFORMA (2)! 18 PAGE 287 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECU (2)Beneficial Ownership (2)PARKER PARSLEY 83A LTD (1)INDEX TO EXHIBITS (2)SELECTED FINANCIAL DATA (5) SUPPLEMENTAL INFORMATION T (6)PARKER PARSLEY 83B LTD ITEM 6 SELECTED FINANCIAL (3)INDEX TO FINANCIAL STATEM (3)Balance Sheet (6)Income Statement (8) STATEMENTS OF PARTNERS CAP (6)Cash Flows (7)NOTE 4 INCOME TAXES (5)! NOTE 5 OIL AND GAS PRODUC (12)! NOTE 5 OIL AND GAS PRODUC (13)! 16 PAGE 315 NOTE 6 RELATED PAR! 16 PAGE 315 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (3) NOTE 7 OIL AND GAS INFORMA (4) NOTE 7 OIL AND GAS INFORMA (5)!18 PAGE 317 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (3)Beneficial Ownership (3)PARKER PARSLEY 83B LTD (1)INDEX TO EXHIBITS (3)SELECTED FINANCIAL DATA (6) SUPPLEMENTAL INFORMATION T (7)PARKER PARSLEY 84A LTD ITEM 6 SELECTED FINANCIAL (4)INDEX TO FINANCIAL STATEM (4)Balance Sheet (7)Income Statement (9) STATEMENTS OF PARTNERS CAP (7)Cash Flows (8)!15 PAGE 344 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (14)! NOTE 5 OIL AND GAS PRODUC (15)! 16 PAGE 345 NOTE 6 RELATED PAR! 16 PAGE 345 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (6) NOTE 7 OIL AND GAS INFORMA (7) NOTE 7 OIL AND GAS INFORMA (8)!18 PAGE 347 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (4)Beneficial Ownership (4)PARKER PARSLEY 84A LTD (1)INDEX TO EXHIBITS (4)SELECTED FINANCIAL DATA (7) SUPPLEMENTAL INFORMATION T (8)PARKER PARSLEY 85A LTD ITEM 6 SELECTED FINANCIAL (5)INDEX TO FINANCIAL STATEM (5)Balance Sheet (8)Income Statement (10) STATEMENTS OF PARTNERS CAP (8)Cash Flows (9)NOTE 4 INCOME TAXES (6)! NOTE 5 OIL AND GAS PRODUC (16)! NOTE 5 OIL AND GAS PRODUC (17)! 16 PAGE 375 NOTE 6 RELATED PAR! 16 PAGE 375 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (9) NOTE 7 OIL AND GAS INFORM (10) NOTE 7 OIL AND GAS INFORM (11)!18 PAGE 377 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (5)Beneficial Ownership (5)PARKER PARSLEY 85A LTD (1)INDEX TO EXHIBITS (5)SELECTED FINANCIAL DATA (8) SUPPLEMENTAL INFORMATION T (9)PARKER PARSLEY 85B LTD ITEM 6 SELECTED FINANCIAL (6)!7 PAGE 396 ITEM 8 FINANCIAL STABalance Sheet (9) STATEMENTS OF PARTNERS CAP (9)Cash Flows (10)!15 PAGE 404 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (18)! NOTE 5 OIL AND GAS PRODUC (19)! 16 PAGE 405 NOTE 6 RELATED PAR! 16 PAGE 405 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (12) NOTE 7 OIL AND GAS INFORM (13) NOTE 7 OIL AND GAS INFORM (14)!18 PAGE 407 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (6)Beneficial Ownership (6)PARKER PARSLEY 85B LTD (1)INDEX TO EXHIBITS (6)SELECTED FINANCIAL DATA (9) SUPPLEMENTAL INFORMATION (10)Balance Sheet (10)Income Statement (11) STATEMENTS OF PARTNERS CA (10)Cash Flows (11)NOTE 4 INCOME TAXES (7)! NOTE 5 OIL AND GAS PRODUC (20)! NOTE 5 OIL AND GAS PRODUC (21)! 9 PAGE 428 NOTE 6 RELATED PART! 9 PAGE 428 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (15) NOTE 7 OIL AND GAS INFORM (16) NOTE 7 OIL AND GAS INFORM (17)! 11 PAGE 430 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (10) SUPPLEMENTAL INFORMATION (11)Balance Sheet (11)Income Statement (12) STATEMENTS OF PARTNERS CA (11)Cash Flows (12) 8 PAGE 446 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (22)! NOTE 5 OIL AND GAS PRODUC (23)! 9 PAGE 447 NOTE 6 RELATED PART! 9 PAGE 447 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (18) NOTE 7 OIL AND GAS INFORM (19) NOTE 7 OIL AND GAS INFORM (20)! 11 PAGE 449 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (11) SUPPLEMENTAL INFORMATION (12)PARKER PARSLEY 86A LTD ITEM 6 SELECTED FINANCIAL (7)INDEX TO FINANCIAL STATEM (6)Balance Sheet (12)Income Statement (13) STATEMENTS OF PARTNERS CA (12)Cash Flows (13)NOTE 4 INCOME TAXES (8)! NOTE 5 OIL AND GAS PRODUC (24)! NOTE 5 OIL AND GAS PRODUC (25)! 16 PAGE 473 NOTE 6 RELATED PAR! 16 PAGE 473 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (21) NOTE 7 OIL AND GAS INFORM (22) NOTE 7 OIL AND GAS INFORM (23)!18 PAGE 475 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (7)Beneficial Ownership (7)PARKER PARSLEY 86A LTD (1)INDEX TO EXHIBITS (7)SELECTED FINANCIAL DATA (12) SUPPLEMENTAL INFORMATION (13)PARKER PARSLEY 86B LTD ITEM 6 SELECTED FINANCIAL (8)INDEX TO FINANCIAL STATEM (7)Balance Sheet (13)Income Statement (14) STATEMENTS OF PARTNERS CA (13)Cash Flows (14)!16 PAGE 503 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (26)! NOTE 5 OIL AND GAS PRODUC (27)! NOTE 6 RELATED PARTY TRANS (4)! NOTE 6 RELATED PARTY TRANS (5) NOTE 7 OIL AND GAS INFORM (24) NOTE 7 OIL AND GAS INFORM (25) NOTE 7 OIL AND GAS INFORM (26)!19 PAGE 506 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (8)Beneficial Ownership (8)PARKER PARSLEY 86B LTD (1)INDEX TO EXHIBITS (8)SELECTED FINANCIAL DATA (13) SUPPLEMENTAL INFORMATION (14) ITEM 6 SELECTED FINANCIAL (9)!7 PAGE 525 ITEM 8 FINANCIAL STABalance Sheet (14)Income Statement (15) STATEMENTS OF PARTNERS CA (14)Cash Flows (15)NOTE 4 INCOME TAXES (9)! NOTE 5 OIL AND GAS PRODUC (28)! NOTE 5 OIL AND GAS PRODUC (29)! 16 PAGE 534 NOTE 6 RELATED PAR! 16 PAGE 534 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (27) NOTE 7 OIL AND GAS INFORM (28) NOTE 7 OIL AND GAS INFORM (29)!18 PAGE 536 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (9)Beneficial Ownership (9)PARKER PARSLEY 86C LTDSELECTED FINANCIAL DATA (14) SUPPLEMENTAL INFORMATION (15)Balance Sheet (15)Income Statement (16) STATEMENTS OF PARTNERS CA (15)Cash Flows (16) 8 PAGE 556 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (30)! NOTE 5 OIL AND GAS PRODUC (31)! NOTE 6 RELATED PARTY TRANS (6)! NOTE 6 RELATED PARTY TRANS (7) NOTE 7 OIL AND GAS INFORM (30) NOTE 7 OIL AND GAS INFORM (31) NOTE 7 OIL AND GAS INFORM (32)! 11 PAGE 559 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (15) SUPPLEMENTAL INFORMATION (16)Balance Sheet (16)Income Statement (17) STATEMENTS OF PARTNERS CA (16)Cash Flows (17)NOTE 4 INCOME TAXES (10)! NOTE 5 OIL AND GAS PRODUC (32)! NOTE 5 OIL AND GAS PRODUC (33)! 9 PAGE 576 NOTE 6 RELATED PART! 9 PAGE 576 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (33) NOTE 7 OIL AND GAS INFORM (34) NOTE 7 OIL AND GAS INFORM (35)!11 PAGE 578 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (16) SUPPLEMENTAL INFORMATION (17) ITEM 6 SELECTED FINANCIAL (10)!8 PAGE 594 ITEM 8 FINANCIAL STABalance Sheet (17)Income Statement (18) STATEMENTS OF PARTNERS CA (17)Cash Flows (18)NOTE 4 INCOME TAXES (11)! NOTE 5 OIL AND GAS PRODUC (34)! NOTE 5 OIL AND GAS PRODUC (35)! 17 PAGE 603 NOTE 6 RELATED PAR! 17 PAGE 603 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (36) NOTE 7 OIL AND GAS INFORM (37) NOTE 7 OIL AND GAS INFORM (38)! 19 PAGE 605 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (10)Beneficial Ownership (10)PARKER PARSLEY 87A LTDSELECTED FINANCIAL DATA (17) SUPPLEMENTAL INFORMATION (18)Balance Sheet (18)Income Statement (19) STATEMENTS OF PARTNERS CA (18)Cash Flows (19) 8 PAGE 625 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (36)! NOTE 5 OIL AND GAS PRODUC (37)! 9 PAGE 626 NOTE 6 RELATED PART! 9 PAGE 626 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (39) NOTE 7 OIL AND GAS INFORM (40) NOTE 7 OIL AND GAS INFORM (41)! 11 PAGE 628 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (18) SUPPLEMENTAL INFORMATION (19) ITEM 6 SELECTED FINANCIAL (11)INDEX TO FINANCIAL STATEM (8)Balance Sheet (19)Income Statement (20) STATEMENTS OF PARTNERS CA (19)Cash Flows (20)NOTE 4 INCOME TAXES (12)! NOTE 5 OIL AND GAS PRODUC (38)! NOTE 5 OIL AND GAS PRODUC (39)! 17 PAGE 653 NOTE 6 RELATED PAR! 17 PAGE 653 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (42) NOTE 7 OIL AND GAS INFORM (43) NOTE 7 OIL AND GAS INFORM (44)! 19 PAGE 655 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (11)Beneficial Ownership (11)PARKER PARSLEY 87B LTDINDEX TO EXHIBITS (9)SELECTED FINANCIAL DATA (19) SUPPLEMENTAL INFORMATION (20) ITEM 6 SELECTED FINANCIAL (12)INDEX TO FINANCIAL STATEM (9)Balance Sheet (20)Income Statement (21) STATEMENTS OF PARTNERS CA (20)Cash Flows (21)!16 PAGE 683 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (40)! NOTE 5 OIL AND GAS PRODUC (41)! NOTE 6 RELATED PARTY TRANS (8)! NOTE 6 RELATED PARTY TRANS (9) NOTE 7 OIL AND GAS INFORM (45) NOTE 7 OIL AND GAS INFORM (46) NOTE 7 OIL AND GAS INFORM (47)!19 PAGE 686 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (12)Beneficial Ownership (12)PROPERTIES 87A LTDINDEX TO EXHIBITS (10)SELECTED FINANCIAL DATA (20) SUPPLEMENTAL INFORMATION (21) ITEM 6 SELECTED FINANCIAL (13)INDEX TO FINANCIAL STATE (10)Balance Sheet (21)Income Statement (22) STATEMENTS OF PARTNERS CA (21)Cash Flows (22)!16 PAGE 714 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (42)! NOTE 5 OIL AND GAS PRODUC (43)! 17 PAGE 715 NOTE 6 RELATED PAR! 17 PAGE 715 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (48) NOTE 7 OIL AND GAS INFORM (49) NOTE 7 OIL AND GAS INFORM (50)! 19 PAGE 717 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (13)Beneficial Ownership (13)PROPERTIES 87B LTDINDEX TO EXHIBITS (11)SELECTED FINANCIAL DATA (21) SUPPLEMENTAL INFORMATION (22)Balance Sheet (22)Income Statement (23) STATEMENTS OF PARTNERS CA (22)Cash Flows (23) 8 PAGE 737 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (44)! NOTE 5 OIL AND GAS PRODUC (45)! 9 PAGE 738 NOTE 6 RELATED PART! 9 PAGE 738 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (51) NOTE 7 OIL AND GAS INFORM (52) NOTE 7 OIL AND GAS INFORM (53)! 11 PAGE 740 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (22) SUPPLEMENTAL INFORMATION (23)Balance Sheet (23)Income Statement (24) STATEMENTS OF PARTNERS CA (23)Cash Flows (24) 8 PAGE 756 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (46)! NOTE 5 OIL AND GAS PRODUC (47)! 9 PAGE 757 NOTE 6 RELATED PART! 9 PAGE 757 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (54) NOTE 7 OIL AND GAS INFORM (55) NOTE 7 OIL AND GAS INFORM (56)! 11 PAGE 759 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (23)!31 2000 1 PAGE 766 PARKER PARSLPARKER PARSLEY 88A LP ITEM 6 SELECTED FINANCIAL (14)INDEX TO FINANCIAL STATE (11)Balance Sheet (24)Income Statement (25) STATEMENTS OF PARTNERS CA (24)Cash Flows (25)NOTE 4 INCOME TAXES (13)! NOTE 5 OIL AND GAS PRODUC (48)! NOTE 5 OIL AND GAS PRODUC (49)! 16 PAGE 783 NOTE 6 RELATED PAR! 16 PAGE 783 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (57) NOTE 7 OIL AND GAS INFORM (58) NOTE 7 OIL AND GAS INFORM (59)! 18 PAGE 785 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (14)Beneficial Ownership (14)PARKER PARSLEY 88A LP (1)INDEX TO EXHIBITS (12)SELECTED FINANCIAL DATA (24) SUPPLEMENTAL INFORMATION (24)Balance Sheet (25)Income Statement (26) STATEMENTS OF PARTNERS CA (25)Cash Flows (26) 8 PAGE 805 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (50)! NOTE 5 OIL AND GAS PRODUC (51)! 9 PAGE 806 NOTE 6 RELATED PART! 9 PAGE 806 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (60) NOTE 7 OIL AND GAS INFORM (61) NOTE 7 OIL AND GAS INFORM (62)! 11 PAGE 808 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (25)!31 2000 1 PAGE 815 PARKER PARSLPARKER PARSLEY 88B LP ITEM 6 SELECTED FINANCIAL (15)INDEX TO FINANCIAL STATE (12)Balance Sheet (26)Income Statement (27) STATEMENTS OF PARTNERS CA (26)Cash Flows (27)!16 PAGE 832 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (52)! NOTE 5 OIL AND GAS PRODUC (53)! 17 PAGE 833 NOTE 6 RELATED PAR! 17 PAGE 833 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (63) NOTE 7 OIL AND GAS INFORM (64) NOTE 7 OIL AND GAS INFORM (65)! 19 PAGE 835 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (15)Beneficial Ownership (15)PARKER PARSLEY 88B LP (1)INDEX TO EXHIBITS (13)SELECTED FINANCIAL DATA (26) SUPPLEMENTAL INFORMATION (25)Balance Sheet (27)Income Statement (28) STATEMENTS OF PARTNERS CA (27)Cash Flows (28) 8 PAGE 855 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (54)! NOTE 5 OIL AND GAS PRODUC (55)! 9 PAGE 856 NOTE 6 RELATED PART! 9 PAGE 856 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (66) NOTE 7 OIL AND GAS INFORM (67) NOTE 7 OIL AND GAS INFORM (68)! 11 PAGE 858 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (27)!31 2000 1 PAGE 865 PARKER PARSLBalance Sheet (28)Income Statement (29) STATEMENTS OF PARTNERS CA (28)Cash Flows (29) 8 PAGE 874 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (56)! NOTE 5 OIL AND GAS PRODUC (57)! 9 PAGE 875 NOTE 6 RELATED PART! 9 PAGE 875 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (69) NOTE 7 OIL AND GAS INFORM (70) NOTE 7 OIL AND GAS INFORM (71)! 11 PAGE 877 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (28) SUPPLEMENTAL INFORMATION (26)!PARKER PARSLEY PRODUCING PROPER ITEM 6 SELECTED FINANCIAL (16)INDEX TO FINANCIAL STATE (13)Balance Sheet (29)Income Statement (30) STATEMENTS OF PARTNERS CA (29)Cash Flows (30)NOTE 4 INCOME TAXES (14)! NOTE 5 OIL AND GAS PRODUC (58)! NOTE 5 OIL AND GAS PRODUC (59)! 16 PAGE 901 NOTE 6 RELATED PAR! 16 PAGE 901 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (72) NOTE 7 OIL AND GAS INFORM (73)!18 PAGE 903 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (16)Beneficial Ownership (16)PROPERTIES 88A LPINDEX TO EXHIBITS (14)SELECTED FINANCIAL DATA (29) SUPPLEMENTAL INFORMATION (27)Balance Sheet (30)Income Statement (31) STATEMENTS OF PARTNERS CA (30)Cash Flows (31)NOTE 4 INCOME TAXES (15)! NOTE 5 OIL AND GAS PRODUC (60)! NOTE 5 OIL AND GAS PRODUC (61)! 9 PAGE 924 NOTE 6 RELATED PART! 9 PAGE 924 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (74) NOTE 7 OIL AND GAS INFORM (75) NOTE 7 OIL AND GAS INFORM (76)! 11 PAGE 926 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (30) SUPPLEMENTAL INFORMATION (28)Balance Sheet (31)Income Statement (32) STATEMENTS OF PARTNERS CA (31)Cash Flows (32)NOTE 4 INCOME TAXES (16)! NOTE 5 OIL AND GAS PRODUC (62)! NOTE 5 OIL AND GAS PRODUC (63)! 9 PAGE 943 NOTE 6 RELATED PART! 9 PAGE 943 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (77) NOTE 7 OIL AND GAS INFORM (78) NOTE 7 OIL AND GAS INFORM (79)!11 PAGE 945 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (31)!31 2000 1 PAGE 952 PARKER PARSLPARKER PARSLEY 89A LP ITEM 6 SELECTED FINANCIAL (17)INDEX TO FINANCIAL STATE (14)Balance Sheet (32)Income Statement (33) STATEMENTS OF PARTNERS CA (32)Cash Flows (33)NOTE 4 INCOME TAXES (17)! NOTE 5 OIL AND GAS PRODUC (64)! NOTE 5 OIL AND GAS PRODUC (65)! 16 PAGE 969 NOTE 6 RELATED PAR! 16 PAGE 969 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (80) NOTE 7 OIL AND GAS INFORM (81) NOTE 7 OIL AND GAS INFORM (82) NOTE 7 OIL AND GAS INFORM (83)! 18 PAGE 971 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (17)Beneficial Ownership (17)PARKER PARSLEY 89A LP (1)INDEX TO EXHIBITS (15)SELECTED FINANCIAL DATA (32) SUPPLEMENTAL INFORMATION (29)Balance Sheet (33)Income Statement (34) STATEMENTS OF PARTNERS CA (33)Cash Flows (34) 8 PAGE 991 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (66)! NOTE 5 OIL AND GAS PRODUC (67)! 9 PAGE 992 NOTE 6 RELATED PART! 9 PAGE 992 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (84) NOTE 7 OIL AND GAS INFORM (85) NOTE 7 OIL AND GAS INFORM (86)! 11 PAGE 994 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (33)!31 2000 1 PAGE 1001 PARKER PARSBalance Sheet (34)Income Statement (35) STATEMENTS OF PARTNERS CA (34)Cash Flows (35)!8 PAGE 1010 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (68)! NOTE 5 OIL AND GAS PRODUC (69)! 9 PAGE 1011 NOTE 6 RELATED PAR! 9 PAGE 1011 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (87) NOTE 7 OIL AND GAS INFORM (88) NOTE 7 OIL AND GAS INFORM (89)!11 PAGE 1013 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (34) SUPPLEMENTAL INFORMATION (30)Balance Sheet (35)Income Statement (36) STATEMENTS OF PARTNERS CA (35)Cash Flows (36)!8 PAGE 1029 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (70)! NOTE 5 OIL AND GAS PRODUC (71)! 9 PAGE 1030 NOTE 6 RELATED PAR! 9 PAGE 1030 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (90) NOTE 7 OIL AND GAS INFORM (91) NOTE 7 OIL AND GAS INFORM (92)! 11 PAGE 1032 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (35) SUPPLEMENTAL INFORMATION (31)Balance Sheet (36)Income Statement (37) STATEMENTS OF PARTNERS CA (36)Cash Flows (37)!8 PAGE 1048 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (72)! NOTE 5 OIL AND GAS PRODUC (73)! 9 PAGE 1049 NOTE 6 RELATED PAR! 9 PAGE 1049 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (93) NOTE 7 OIL AND GAS INFORM (94) NOTE 7 OIL AND GAS INFORM (95)! 11 PAGE 1051 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (36)!31 2000 1 PAGE 1058 PARKER PARSPARKER PARSLEY 90A LP ITEM 6 SELECTED FINANCIAL (18)INDEX TO FINANCIAL STATE (15)Balance Sheet (37)Income Statement (38) STATEMENTS OF PARTNERS CA (37)Cash Flows (38)!15 PAGE 1074 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (74)! NOTE 5 OIL AND GAS PRODUC (75)! NOTE 6 RELATED PARTY TRAN (10)! NOTE 6 RELATED PARTY TRAN (11) NOTE 7 OIL AND GAS INFORM (96) NOTE 7 OIL AND GAS INFORM (97)! 18 PAGE 1077 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (18)Beneficial Ownership (18)PARKER PARSLEY 90A LP (1)INDEX TO EXHIBITS (16)SELECTED FINANCIAL DATA (37) SUPPLEMENTAL INFORMATION (32)PARKER PARSLEY 90B CONV LP ITEM 6 SELECTED FINANCIAL (19)INDEX TO FINANCIAL STATE (16)Balance Sheet (38)Income Statement (39) STATEMENTS OF PARTNERS CA (38)Cash Flows (39)!16 PAGE 1105 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (76)! NOTE 5 OIL AND GAS PRODUC (77)! NOTE 6 RELATED PARTY TRAN (12)! NOTE 6 RELATED PARTY TRAN (13) NOTE 7 OIL AND GAS INFORM (98) NOTE 7 OIL AND GAS INFORM (99) NOTE 7 OIL AND GAS INFOR (100)! 19 PAGE 1108 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (19)Beneficial Ownership (19) PARKER PARSLEY 90B CONV LP (1)INDEX TO EXHIBITS (17)SELECTED FINANCIAL DATA (38)!31 2000 1 PAGE 1119 PARKER PARSPARKER PARSLEY 90B LP ITEM 6 SELECTED FINANCIAL (20)INDEX TO FINANCIAL STATE (17)Balance Sheet (39)Income Statement (40) STATEMENTS OF PARTNERS CA (39)Cash Flows (40)!16 PAGE 1136 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (78)! NOTE 5 OIL AND GAS PRODUC (79)! NOTE 6 RELATED PARTY TRAN (14)! NOTE 6 RELATED PARTY TRAN (15) NOTE 7 OIL AND GAS INFOR (101) NOTE 7 OIL AND GAS INFOR (102) NOTE 7 OIL AND GAS INFOR (103)! 19 PAGE 1139 NOTE 8 MAJOR CUS!ITEM 10 DIRECTORS AND EXEC (20)Beneficial Ownership (20)PARKER PARSLEY 90B LP (1)INDEX TO EXHIBITS (18)SELECTED FINANCIAL DATA (39) SUPPLEMENTAL INFORMATION (33)PARKER PARSLEY 90C CONV LP ITEM 6 SELECTED FINANCIAL (21)INDEX TO FINANCIAL STATE (18)Balance Sheet (40)Income Statement (41) STATEMENTS OF PARTNERS CA (40)Cash Flows (41)!15 PAGE 1166 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (80)! NOTE 5 OIL AND GAS PRODUC (81)! NOTE 6 RELATED PARTY TRAN (16)! NOTE 6 RELATED PARTY TRAN (17) NOTE 7 OIL AND GAS INFOR (104) NOTE 7 OIL AND GAS INFOR (105) NOTE 7 OIL AND GAS INFOR (106)! 18 PAGE 1169 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (21)Beneficial Ownership (21) PARKER PARSLEY 90C CONV LP (1)INDEX TO EXHIBITS (19)SELECTED FINANCIAL DATA (40)!31 2000 1 PAGE 1180 PARKER PARSPARKER PARSLEY 90C LP ITEM 6 SELECTED FINANCIAL (22)INDEX TO FINANCIAL STATE (19)Balance Sheet (41)Income Statement (42) STATEMENTS OF PARTNERS CA (41)Cash Flows (42)!15 PAGE 1196 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (82)! NOTE 5 OIL AND GAS PRODUC (83)! NOTE 6 RELATED PARTY TRAN (18)! NOTE 6 RELATED PARTY TRAN (19) NOTE 7 OIL AND GAS INFOR (107) NOTE 7 OIL AND GAS INFOR (108) NOTE 7 OIL AND GAS INFOR (109)! 18 PAGE 1199 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (22)Beneficial Ownership (22)PARKER PARSLEY 90C LP (1)INDEX TO EXHIBITS (20)SELECTED FINANCIAL DATA (41) SUPPLEMENTAL INFORMATION (34)Balance Sheet (42)Income Statement (43) STATEMENTS OF PARTNERS CA (42)Cash Flows (43)!8 PAGE 1219 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (84)! NOTE 5 OIL AND GAS PRODUC (85)! 9 PAGE 1220 NOTE 6 RELATED PAR! 9 PAGE 1220 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (110) NOTE 7 OIL AND GAS INFOR (111) NOTE 7 OIL AND GAS INFOR (112)! 11 PAGE 1222 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (42) SUPPLEMENTAL INFORMATION (35)Balance Sheet (43)Income Statement (44) STATEMENTS OF PARTNERS CA (43)Cash Flows (44)!8 PAGE 1238 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (86)! NOTE 5 OIL AND GAS PRODUC (87)! 9 PAGE 1239 NOTE 6 RELATED PAR! 9 PAGE 1239 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (113) NOTE 7 OIL AND GAS INFOR (114) NOTE 7 OIL AND GAS INFOR (115)! 11 PAGE 1241 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (43)!31 2000 1 PAGE 1248 PARKER PARSPARKER PARSLEY 91A LP ITEM 6 SELECTED FINANCIAL (23)INDEX TO FINANCIAL STATE (20)Balance Sheet (44)Income Statement (45) STATEMENTS OF PARTNERS CA (44)Cash Flows (45)!15 PAGE 1264 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (88)! NOTE 5 OIL AND GAS PRODUC (89)! NOTE 6 RELATED PARTY TRAN (20)! NOTE 6 RELATED PARTY TRAN (21) NOTE 7 OIL AND GAS INFOR (116) NOTE 7 OIL AND GAS INFOR (117) NOTE 7 OIL AND GAS INFOR (118)! 18 PAGE 1267 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (23)Beneficial Ownership (23)PARKER PARSLEY 91A LP (1)INDEX TO EXHIBITS (21)SELECTED FINANCIAL DATA (44)!31 2000 1 PAGE 1278 PARKER PARSPARKER PARSLEY 91B LP ITEM 6 SELECTED FINANCIAL (24)INDEX TO FINANCIAL STATE (21)Balance Sheet (45)Income Statement (46) STATEMENTS OF PARTNERS CA (45)Cash Flows (46)!15 PAGE 1294 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (90)! NOTE 5 OIL AND GAS PRODUC (91)! NOTE 6 RELATED PARTY TRAN (22)! NOTE 6 RELATED PARTY TRAN (23) NOTE 7 OIL AND GAS INFOR (119) NOTE 7 OIL AND GAS INFOR (120) NOTE 7 OIL AND GAS INFOR (121)! 18 PAGE 1297 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (24)Beneficial Ownership (24)PARKER PARSLEY 91B LP (1)INDEX TO EXHIBITS (22)SELECTED FINANCIAL DATA (45)POWER OF ATTORNEYPOWER OF ATTORNEY (1)POWER OF ATTORNEY (2)POWER OF ATTORNEY (3)POWER OF ATTORNEY (4)POWER OF ATTORNEY (5)POWER OF ATTORNEY (6)POWER OF ATTORNEY (7)!2001 THE BOARD OF DIRECTORS REC!2001 THE BOARD OF DIRECTORS (1)!2001 THE BOARD OF DIRECTORS (2)PAGE 2U } J} mB &    $PIONEER NATURAL RESOURCES CO S-4 04/17/2001TO BE HELD ON , 2001 , $ Parker & Parsley 81-I, Ltd.) !Parker & Parsley 88-A Conv., L.P.- % Parker & Parsley 81-II, Ltd.# Parker & Parsley 88-A, L.P., $ Parker & Parsley 82-I, Ltd.) !Parker & Parsley 88-B Conv., L.P.-% Parker & Parsley 82-II, Ltd.#Parker & Parsley 88-B, L.P..& Parker & Parsley 82-III, Ltd.)!Parker & Parsley 88-C Conv., L.P.,$ Parker & Parsley 83-A, Ltd.#Parker & Parsley 88-C, L.P.,$ Parker & Parsley 83-B, Ltd.80Parker & Parsley Producing Properties 88-A, L.P.,$ Parker & Parsley 84-A, Ltd.4,Parker & Parsley Private Investment 88, L.P.,$ Parker & Parsley 85-A, Ltd.)!Parker & Parsley 89-A Conv., L.P.,$ Parker & Parsley 85-B, Ltd.#Parker & Parsley 89-A, L.P.?7 Parker & Parsley Private Investment 85-A, Ltd.)!Parker & Parsley 89-B Conv., L.P.F> Parker & Parsley Selected 85 Private Investment, Ltd.#Parker & Parsley 89-B, L.P.,$ Parker & Parsley 86-A, Ltd.4,Parker & Parsley Private Investment 89, L.P.,$ Parker & Parsley 86-B, Ltd.)!Parker & Parsley 90-A Conv., L.P.,$ Parker & Parsley 86-C, Ltd.#Parker & Parsley 90-A, L.P.=5 Parker & Parsley Private Investment 86, Ltd.)!Parker & Parsley 90-B Conv., L.P.2* Parker & Parsley 87-A Conv., Ltd.#Parker & Parsley 90-B, L.P.,$ Parker & Parsley 87-A, Ltd.)!Parker & Parsley 90-C Conv., L.P.2* Parker & Parsley 87-B Conv., Ltd.#Parker & Parsley 90-C, L.P.,$ Parker & Parsley 87-B, Ltd.4,Parker & Parsley Private Investment 90, L.P.A9 Parker & Parsley Producing Properties 87-A, Ltd.?7Parker & Parsley 90 Spraberry Private Development, L.P.A9 Parker & Parsley Producing Properties 87-B, Ltd.#Parker & Parsley 91-A, L.P.D l{ocWK9+W3Z8~! !"#$%= 5 Parker & Parsley Private Investment 87, Ltd.# Parker & Parsley 91-B, L.P.!"$#____________________________1$)Created by Morningstar Document Research.0%(http://documentresearch.morningstar.com/dX=PF0*8X> @%%$$## l   e:x dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/?? SECURITIES AND EXC!CALCULATION OF REGISTRATION FEETO BE HELD ON 2001PAGE 7 LIST OF APPENDICES!LIMITED PARTNER INVESTMENT REPA!LIMITED PARTNER INVESTMENT (1) 5 PAGE 15 NYMEX FUTURES PRICES!EXAMPLE CALCULATION OF MERGER VIncome StatementIncome Statement (1)AT DECEMBER 31 2000!15 PAGE 25 COMPARATIVE PER SHAR!25 PAGE 35 REASONS FOR THE MERGFAIRNESS OPINIONFAIRNESS OPINION (1)!LEGAL OPINION FOR LIMITED PARTN!LEGAL OPINION FOR LIMITED P (1)!NONMANAGING GENERAL PARTNERS OF!49 PAGE 59 PAYMENT OF EXPENSES !58 PAGE 68 COMPARATIVE PER SHAR!60 PAGE 70 OWNERSHIP OF PARTNER PIONEER PIONEER USATHE DRILLING PARTNERSHIPSTHE DRILLING PARTNERSHIPS (1)THE INCOME PARTNERSHIPS INTERESTSINTERESTS (1)INTERESTS (2)INTERESTS (3)INTERESTS (4)INTERESTS (5)!WHERE YOU CAN FIND MORE INFORMAAS OF DECEMBER 31 2000YEAR ENDED DECEMBER 31 2000!QUANTITIES OF OIL AND GAS RESER!STANDARDIZED MEASURE OF DISCOUN CASH FLOWSAS OF MARCH 31 2001AS OF MARCH 31 2001 (1)AS OF MARCH 31 2001 (2)AS OF MARCH 31 2001 (3)AS OF MARCH 31 2001 (4)AS OF MARCH 31 2001 (5)!FROM INCEPTION THROUGH MARCH 31!ANNUAL REPURCHASE PRICES AND AGOF EACH PARTNERSHIP!FOR THE THREE MONTHS ENDED MARCAS OF DECEMBER 31 2000 (1)AS OF MARCH 31 2001 (6)!THE YEARS ENDED DECEMBER 31 200AS OF DECEMBER 31 2000 (2)DECEMBER 31 2000 AND 1999EFFECTIVE DECEMBER 31 2000 EFFECTIVE DECEMBER 31 2000 (1) RECITALS RECITALS (1) SUPPLEMENTAL INFORMATION TABLEBalance SheetIncome Statement (2) STATEMENTS OF PARTNERS CAPITALCash Flows (1)NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCING A! NOTE 5 OIL AND GAS PRODUCI (1)! NOTE 6 RELATED PARTY TRANSACTI! NOTE 6 RELATED PARTY TRANS (1)! NOTE 7 OIL AND GAS INFORMATION! NOTE 7 OIL AND GAS INFORMA (1)! NOTE 7 OIL AND GAS INFORMA (2)!11 PAGE 163 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA SUPPLEMENTAL INFORMATION T (1)Balance Sheet (1)Income Statement (3) STATEMENTS OF PARTNERS CAP (1)Cash Flows (2)NOTE 4 INCOME TAXES (1)! NOTE 5 OIL AND GAS PRODUCI (2)! NOTE 5 OIL AND GAS PRODUCI (3)! 9 PAGE 180 NOTE 6 RELATED PAR! 9 PAGE 180 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORMA (3)! NOTE 7 OIL AND GAS INFORMA (4)! NOTE 7 OIL AND GAS INFORMA (5)!11 PAGE 182 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (1) SUPPLEMENTAL INFORMATION T (2) ITEM 6 SELECTED FINANCIAL DATAINDEX TO FINANCIAL STATEMENTSBalance Sheet (2)Income Statement (4) STATEMENTS OF PARTNERS CAP (2)Cash Flows (3)!15 PAGE 205 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCI (4)! NOTE 5 OIL AND GAS PRODUCI (5)! NOTE 6 RELATED PARTY TRANS (2)! NOTE 6 RELATED PARTY TRANS (3)! NOTE 7 OIL AND GAS INFORMA (6)! NOTE 7 OIL AND GAS INFORMA (7)! NOTE 7 OIL AND GAS INFORMA (8)! NOTE 7 OIL AND GAS INFORMA (9)! NOTE 7 OIL AND GAS INFORM (10)! 18 PAGE 208 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECUTIVEBeneficial OwnershipPARKER PARSLEY 82I LTDINDEX TO EXHIBITSSELECTED FINANCIAL DATA (2) SUPPLEMENTAL INFORMATION T (3) ITEM 6 SELECTED FINANCIAL (1)INDEX TO FINANCIAL STATEM (1)Balance Sheet (3)Income Statement (5) STATEMENTS OF PARTNERS CAP (3)Cash Flows (4)NOTE 4 INCOME TAXES (2)! NOTE 5 OIL AND GAS PRODUCI (6)! NOTE 5 OIL AND GAS PRODUCI (7)! 16 PAGE 236 NOTE 6 RELATED PAR! 16 PAGE 236 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (11)! NOTE 7 OIL AND GAS INFORM (12)! NOTE 7 OIL AND GAS INFORM (13)!18 PAGE 238 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (1)Beneficial Ownership (1)PARKER PARSLEY 82II LTDINDEX TO EXHIBITS (1)SELECTED FINANCIAL DATA (3) SUPPLEMENTAL INFORMATION T (4)Balance Sheet (4)Income Statement (6) STATEMENTS OF PARTNERS CAP (4)Cash Flows (5)NOTE 4 INCOME TAXES (3)! NOTE 5 OIL AND GAS PRODUCI (8)! NOTE 5 OIL AND GAS PRODUCI (9)! 9 PAGE 259 NOTE 6 RELATED PART! 9 PAGE 259 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (14)! NOTE 7 OIL AND GAS INFORM (15)! NOTE 7 OIL AND GAS INFORM (16)!11 PAGE 261 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (4) SUPPLEMENTAL INFORMATION T (5)PARKER PARSLEY 83A LTD ITEM 6 SELECTED FINANCIAL (2)INDEX TO FINANCIAL STATEM (2)Balance Sheet (5)Income Statement (7) STATEMENTS OF PARTNERS CAP (5)Cash Flows (6)NOTE 4 INCOME TAXES (4)! NOTE 5 OIL AND GAS PRODUC (10)! NOTE 5 OIL AND GAS PRODUC (11)! 16 PAGE 285 NOTE 6 RELATED PAR! 16 PAGE 285 NOTE 6 RELATED (1)!NOTE 7 OIL AND GAS INFORMATION  NOTE 7 OIL AND GAS INFORMA (1) NOTE 7 OIL AND GAS INFORMA (2)! 18 PAGE 287 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECU (2)Beneficial Ownership (2)PARKER PARSLEY 83A LTD (1)INDEX TO EXHIBITS (2)SELECTED FINANCIAL DATA (5) SUPPLEMENTAL INFORMATION T (6)PARKER PARSLEY 83B LTD ITEM 6 SELECTED FINANCIAL (3)INDEX TO FINANCIAL STATEM (3)Balance Sheet (6)Income Statement (8) STATEMENTS OF PARTNERS CAP (6)Cash Flows (7)NOTE 4 INCOME TAXES (5)! NOTE 5 OIL AND GAS PRODUC (12)! NOTE 5 OIL AND GAS PRODUC (13)! 16 PAGE 315 NOTE 6 RELATED PAR! 16 PAGE 315 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (3) NOTE 7 OIL AND GAS INFORMA (4) NOTE 7 OIL AND GAS INFORMA (5)!18 PAGE 317 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (3)Beneficial Ownership (3)PARKER PARSLEY 83B LTD (1)INDEX TO EXHIBITS (3)SELECTED FINANCIAL DATA (6) SUPPLEMENTAL INFORMATION T (7)PARKER PARSLEY 84A LTD ITEM 6 SELECTED FINANCIAL (4)INDEX TO FINANCIAL STATEM (4)Balance Sheet (7)Income Statement (9) STATEMENTS OF PARTNERS CAP (7)Cash Flows (8)!15 PAGE 344 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (14)! NOTE 5 OIL AND GAS PRODUC (15)! 16 PAGE 345 NOTE 6 RELATED PAR! 16 PAGE 345 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (6) NOTE 7 OIL AND GAS INFORMA (7) NOTE 7 OIL AND GAS INFORMA (8)!18 PAGE 347 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (4)Beneficial Ownership (4)PARKER PARSLEY 84A LTD (1)INDEX TO EXHIBITS (4)SELECTED FINANCIAL DATA (7) SUPPLEMENTAL INFORMATION T (8)PARKER PARSLEY 85A LTD ITEM 6 SELECTED FINANCIAL (5)INDEX TO FINANCIAL STATEM (5)Balance Sheet (8)Income Statement (10) STATEMENTS OF PARTNERS CAP (8)Cash Flows (9)NOTE 4 INCOME TAXES (6)! NOTE 5 OIL AND GAS PRODUC (16)! NOTE 5 OIL AND GAS PRODUC (17)! 16 PAGE 375 NOTE 6 RELATED PAR! 16 PAGE 375 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (9) NOTE 7 OIL AND GAS INFORM (10) NOTE 7 OIL AND GAS INFORM (11)!18 PAGE 377 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (5)Beneficial Ownership (5)PARKER PARSLEY 85A LTD (1)INDEX TO EXHIBITS (5)SELECTED FINANCIAL DATA (8) SUPPLEMENTAL INFORMATION T (9)PARKER PARSLEY 85B LTD ITEM 6 SELECTED FINANCIAL (6)!7 PAGE 396 ITEM 8 FINANCIAL STABalance Sheet (9) STATEMENTS OF PARTNERS CAP (9)Cash Flows (10)!15 PAGE 404 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (18)! NOTE 5 OIL AND GAS PRODUC (19)! 16 PAGE 405 NOTE 6 RELATED PAR! 16 PAGE 405 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (12) NOTE 7 OIL AND GAS INFORM (13) NOTE 7 OIL AND GAS INFORM (14)!18 PAGE 407 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (6)Beneficial Ownership (6)PARKER PARSLEY 85B LTD (1)INDEX TO EXHIBITS (6)SELECTED FINANCIAL DATA (9) SUPPLEMENTAL INFORMATION (10)Balance Sheet (10)Income Statement (11) STATEMENTS OF PARTNERS CA (10)Cash Flows (11)NOTE 4 INCOME TAXES (7)! NOTE 5 OIL AND GAS PRODUC (20)! NOTE 5 OIL AND GAS PRODUC (21)! 9 PAGE 428 NOTE 6 RELATED PART! 9 PAGE 428 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (15) NOTE 7 OIL AND GAS INFORM (16) NOTE 7 OIL AND GAS INFORM (17)! 11 PAGE 430 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (10) SUPPLEMENTAL INFORMATION (11)Balance Sheet (11)Income Statement (12) STATEMENTS OF PARTNERS CA (11)Cash Flows (12) 8 PAGE 446 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (22)! NOTE 5 OIL AND GAS PRODUC (23)! 9 PAGE 447 NOTE 6 RELATED PART! 9 PAGE 447 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (18) NOTE 7 OIL AND GAS INFORM (19) NOTE 7 OIL AND GAS INFORM (20)! 11 PAGE 449 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (11) SUPPLEMENTAL INFORMATION (12)PARKER PARSLEY 86A LTD ITEM 6 SELECTED FINANCIAL (7)INDEX TO FINANCIAL STATEM (6)Balance Sheet (12)Income Statement (13) STATEMENTS OF PARTNERS CA (12)Cash Flows (13)NOTE 4 INCOME TAXES (8)! NOTE 5 OIL AND GAS PRODUC (24)! NOTE 5 OIL AND GAS PRODUC (25)! 16 PAGE 473 NOTE 6 RELATED PAR! 16 PAGE 473 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (21) NOTE 7 OIL AND GAS INFORM (22) NOTE 7 OIL AND GAS INFORM (23)!18 PAGE 475 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (7)Beneficial Ownership (7)PARKER PARSLEY 86A LTD (1)INDEX TO EXHIBITS (7)SELECTED FINANCIAL DATA (12) SUPPLEMENTAL INFORMATION (13)PARKER PARSLEY 86B LTD ITEM 6 SELECTED FINANCIAL (8)INDEX TO FINANCIAL STATEM (7)Balance Sheet (13)Income Statement (14) STATEMENTS OF PARTNERS CA (13)Cash Flows (14)!16 PAGE 503 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (26)! NOTE 5 OIL AND GAS PRODUC (27)! NOTE 6 RELATED PARTY TRANS (4)! NOTE 6 RELATED PARTY TRANS (5) NOTE 7 OIL AND GAS INFORM (24) NOTE 7 OIL AND GAS INFORM (25) NOTE 7 OIL AND GAS INFORM (26)!19 PAGE 506 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (8)Beneficial Ownership (8)PARKER PARSLEY 86B LTD (1)INDEX TO EXHIBITS (8)SELECTED FINANCIAL DATA (13) SUPPLEMENTAL INFORMATION (14) ITEM 6 SELECTED FINANCIAL (9)!7 PAGE 525 ITEM 8 FINANCIAL STABalance Sheet (14)Income Statement (15) STATEMENTS OF PARTNERS CA (14)Cash Flows (15)NOTE 4 INCOME TAXES (9)! NOTE 5 OIL AND GAS PRODUC (28)! NOTE 5 OIL AND GAS PRODUC (29)! 16 PAGE 534 NOTE 6 RELATED PAR! 16 PAGE 534 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (27) NOTE 7 OIL AND GAS INFORM (28) NOTE 7 OIL AND GAS INFORM (29)!18 PAGE 536 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (9)Beneficial Ownership (9)PARKER PARSLEY 86C LTDSELECTED FINANCIAL DATA (14) SUPPLEMENTAL INFORMATION (15)Balance Sheet (15)Income Statement (16) STATEMENTS OF PARTNERS CA (15)Cash Flows (16) 8 PAGE 556 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (30)! NOTE 5 OIL AND GAS PRODUC (31)! NOTE 6 RELATED PARTY TRANS (6)! NOTE 6 RELATED PARTY TRANS (7) NOTE 7 OIL AND GAS INFORM (30) NOTE 7 OIL AND GAS INFORM (31) NOTE 7 OIL AND GAS INFORM (32)! 11 PAGE 559 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (15) SUPPLEMENTAL INFORMATION (16)Balance Sheet (16)Income Statement (17) STATEMENTS OF PARTNERS CA (16)Cash Flows (17)NOTE 4 INCOME TAXES (10)! NOTE 5 OIL AND GAS PRODUC (32)! NOTE 5 OIL AND GAS PRODUC (33)! 9 PAGE 576 NOTE 6 RELATED PART! 9 PAGE 576 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (33) NOTE 7 OIL AND GAS INFORM (34) NOTE 7 OIL AND GAS INFORM (35)!11 PAGE 578 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (16) SUPPLEMENTAL INFORMATION (17) ITEM 6 SELECTED FINANCIAL (10)!8 PAGE 594 ITEM 8 FINANCIAL STABalance Sheet (17)Income Statement (18) STATEMENTS OF PARTNERS CA (17)Cash Flows (18)NOTE 4 INCOME TAXES (11)! NOTE 5 OIL AND GAS PRODUC (34)! NOTE 5 OIL AND GAS PRODUC (35)! 17 PAGE 603 NOTE 6 RELATED PAR! 17 PAGE 603 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (36) NOTE 7 OIL AND GAS INFORM (37) NOTE 7 OIL AND GAS INFORM (38)! 19 PAGE 605 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (10)Beneficial Ownership (10)PARKER PARSLEY 87A LTDSELECTED FINANCIAL DATA (17) SUPPLEMENTAL INFORMATION (18)Balance Sheet (18)Income Statement (19) STATEMENTS OF PARTNERS CA (18)Cash Flows (19) 8 PAGE 625 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (36)! NOTE 5 OIL AND GAS PRODUC (37)! 9 PAGE 626 NOTE 6 RELATED PART! 9 PAGE 626 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (39) NOTE 7 OIL AND GAS INFORM (40) NOTE 7 OIL AND GAS INFORM (41)! 11 PAGE 628 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (18) SUPPLEMENTAL INFORMATION (19) ITEM 6 SELECTED FINANCIAL (11)INDEX TO FINANCIAL STATEM (8)Balance Sheet (19)Income Statement (20) STATEMENTS OF PARTNERS CA (19)Cash Flows (20)NOTE 4 INCOME TAXES (12)! NOTE 5 OIL AND GAS PRODUC (38)! NOTE 5 OIL AND GAS PRODUC (39)! 17 PAGE 653 NOTE 6 RELATED PAR! 17 PAGE 653 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (42) NOTE 7 OIL AND GAS INFORM (43) NOTE 7 OIL AND GAS INFORM (44)! 19 PAGE 655 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (11)Beneficial Ownership (11)PARKER PARSLEY 87B LTDINDEX TO EXHIBITS (9)SELECTED FINANCIAL DATA (19) SUPPLEMENTAL INFORMATION (20) ITEM 6 SELECTED FINANCIAL (12)INDEX TO FINANCIAL STATEM (9)Balance Sheet (20)Income Statement (21) STATEMENTS OF PARTNERS CA (20)Cash Flows (21)!16 PAGE 683 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (40)! NOTE 5 OIL AND GAS PRODUC (41)! NOTE 6 RELATED PARTY TRANS (8)! NOTE 6 RELATED PARTY TRANS (9) NOTE 7 OIL AND GAS INFORM (45) NOTE 7 OIL AND GAS INFORM (46) NOTE 7 OIL AND GAS INFORM (47)!19 PAGE 686 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (12)Beneficial Ownership (12)PROPERTIES 87A LTDINDEX TO EXHIBITS (10)SELECTED FINANCIAL DATA (20) SUPPLEMENTAL INFORMATION (21) ITEM 6 SELECTED FINANCIAL (13)INDEX TO FINANCIAL STATE (10)Balance Sheet (21)Income Statement (22) STATEMENTS OF PARTNERS CA (21)Cash Flows (22)!16 PAGE 714 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (42)! NOTE 5 OIL AND GAS PRODUC (43)! 17 PAGE 715 NOTE 6 RELATED PAR! 17 PAGE 715 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (48) NOTE 7 OIL AND GAS INFORM (49) NOTE 7 OIL AND GAS INFORM (50)! 19 PAGE 717 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (13)Beneficial Ownership (13)PROPERTIES 87B LTDINDEX TO EXHIBITS (11)SELECTED FINANCIAL DATA (21) SUPPLEMENTAL INFORMATION (22)Balance Sheet (22)Income Statement (23) STATEMENTS OF PARTNERS CA (22)Cash Flows (23) 8 PAGE 737 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (44)! NOTE 5 OIL AND GAS PRODUC (45)! 9 PAGE 738 NOTE 6 RELATED PART! 9 PAGE 738 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (51) NOTE 7 OIL AND GAS INFORM (52) NOTE 7 OIL AND GAS INFORM (53)! 11 PAGE 740 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (22) SUPPLEMENTAL INFORMATION (23)Balance Sheet (23)Income Statement (24) STATEMENTS OF PARTNERS CA (23)Cash Flows (24) 8 PAGE 756 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (46)! NOTE 5 OIL AND GAS PRODUC (47)! 9 PAGE 757 NOTE 6 RELATED PART! 9 PAGE 757 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (54) NOTE 7 OIL AND GAS INFORM (55) NOTE 7 OIL AND GAS INFORM (56)! 11 PAGE 759 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (23)!31 2000 1 PAGE 766 PARKER PARSLPARKER PARSLEY 88A LP ITEM 6 SELECTED FINANCIAL (14)INDEX TO FINANCIAL STATE (11)Balance Sheet (24)Income Statement (25) STATEMENTS OF PARTNERS CA (24)Cash Flows (25)NOTE 4 INCOME TAXES (13)! NOTE 5 OIL AND GAS PRODUC (48)! NOTE 5 OIL AND GAS PRODUC (49)! 16 PAGE 783 NOTE 6 RELATED PAR! 16 PAGE 783 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (57) NOTE 7 OIL AND GAS INFORM (58) NOTE 7 OIL AND GAS INFORM (59)! 18 PAGE 785 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (14)Beneficial Ownership (14)PARKER PARSLEY 88A LP (1)INDEX TO EXHIBITS (12)SELECTED FINANCIAL DATA (24) SUPPLEMENTAL INFORMATION (24)Balance Sheet (25)Income Statement (26) STATEMENTS OF PARTNERS CA (25)Cash Flows (26) 8 PAGE 805 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (50)! NOTE 5 OIL AND GAS PRODUC (51)! 9 PAGE 806 NOTE 6 RELATED PART! 9 PAGE 806 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (60) NOTE 7 OIL AND GAS INFORM (61) NOTE 7 OIL AND GAS INFORM (62)! 11 PAGE 808 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (25)!31 2000 1 PAGE 815 PARKER PARSLPARKER PARSLEY 88B LP ITEM 6 SELECTED FINANCIAL (15)INDEX TO FINANCIAL STATE (12)Balance Sheet (26)Income Statement (27) STATEMENTS OF PARTNERS CA (26)Cash Flows (27)!16 PAGE 832 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (52)! NOTE 5 OIL AND GAS PRODUC (53)! 17 PAGE 833 NOTE 6 RELATED PAR! 17 PAGE 833 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (63) NOTE 7 OIL AND GAS INFORM (64) NOTE 7 OIL AND GAS INFORM (65)! 19 PAGE 835 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (15)Beneficial Ownership (15)PARKER PARSLEY 88B LP (1)INDEX TO EXHIBITS (13)SELECTED FINANCIAL DATA (26) SUPPLEMENTAL INFORMATION (25)Balance Sheet (27)Income Statement (28) STATEMENTS OF PARTNERS CA (27)Cash Flows (28) 8 PAGE 855 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (54)! NOTE 5 OIL AND GAS PRODUC (55)! 9 PAGE 856 NOTE 6 RELATED PART! 9 PAGE 856 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (66) NOTE 7 OIL AND GAS INFORM (67) NOTE 7 OIL AND GAS INFORM (68)! 11 PAGE 858 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (27)!31 2000 1 PAGE 865 PARKER PARSLBalance Sheet (28)Income Statement (29) STATEMENTS OF PARTNERS CA (28)Cash Flows (29) 8 PAGE 874 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (56)! NOTE 5 OIL AND GAS PRODUC (57)! 9 PAGE 875 NOTE 6 RELATED PART! 9 PAGE 875 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (69) NOTE 7 OIL AND GAS INFORM (70) NOTE 7 OIL AND GAS INFORM (71)! 11 PAGE 877 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (28) SUPPLEMENTAL INFORMATION (26)!PARKER PARSLEY PRODUCING PROPER ITEM 6 SELECTED FINANCIAL (16)INDEX TO FINANCIAL STATE (13)Balance Sheet (29)Income Statement (30) STATEMENTS OF PARTNERS CA (29)Cash Flows (30)NOTE 4 INCOME TAXES (14)! NOTE 5 OIL AND GAS PRODUC (58)! NOTE 5 OIL AND GAS PRODUC (59)! 16 PAGE 901 NOTE 6 RELATED PAR! 16 PAGE 901 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (72) NOTE 7 OIL AND GAS INFORM (73)!18 PAGE 903 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (16)Beneficial Ownership (16)PROPERTIES 88A LPINDEX TO EXHIBITS (14)SELECTED FINANCIAL DATA (29) SUPPLEMENTAL INFORMATION (27)Balance Sheet (30)Income Statement (31) STATEMENTS OF PARTNERS CA (30)Cash Flows (31)NOTE 4 INCOME TAXES (15)! NOTE 5 OIL AND GAS PRODUC (60)! NOTE 5 OIL AND GAS PRODUC (61)! 9 PAGE 924 NOTE 6 RELATED PART! 9 PAGE 924 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (74) NOTE 7 OIL AND GAS INFORM (75) NOTE 7 OIL AND GAS INFORM (76)! 11 PAGE 926 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (30) SUPPLEMENTAL INFORMATION (28)Balance Sheet (31)Income Statement (32) STATEMENTS OF PARTNERS CA (31)Cash Flows (32)NOTE 4 INCOME TAXES (16)! NOTE 5 OIL AND GAS PRODUC (62)! NOTE 5 OIL AND GAS PRODUC (63)! 9 PAGE 943 NOTE 6 RELATED PART! 9 PAGE 943 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (77) NOTE 7 OIL AND GAS INFORM (78) NOTE 7 OIL AND GAS INFORM (79)!11 PAGE 945 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (31)!31 2000 1 PAGE 952 PARKER PARSLPARKER PARSLEY 89A LP ITEM 6 SELECTED FINANCIAL (17)INDEX TO FINANCIAL STATE (14)Balance Sheet (32)Income Statement (33) STATEMENTS OF PARTNERS CA (32)Cash Flows (33)NOTE 4 INCOME TAXES (17)! NOTE 5 OIL AND GAS PRODUC (64)! NOTE 5 OIL AND GAS PRODUC (65)! 16 PAGE 969 NOTE 6 RELATED PAR! 16 PAGE 969 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (80) NOTE 7 OIL AND GAS INFORM (81) NOTE 7 OIL AND GAS INFORM (82) NOTE 7 OIL AND GAS INFORM (83)! 18 PAGE 971 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (17)Beneficial Ownership (17)PARKER PARSLEY 89A LP (1)INDEX TO EXHIBITS (15)SELECTED FINANCIAL DATA (32) SUPPLEMENTAL INFORMATION (29)Balance Sheet (33)Income Statement (34) STATEMENTS OF PARTNERS CA (33)Cash Flows (34) 8 PAGE 991 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (66)! NOTE 5 OIL AND GAS PRODUC (67)! 9 PAGE 992 NOTE 6 RELATED PART! 9 PAGE 992 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (84) NOTE 7 OIL AND GAS INFORM (85) NOTE 7 OIL AND GAS INFORM (86)! 11 PAGE 994 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (33)!31 2000 1 PAGE 1001 PARKER PARSBalance Sheet (34)Income Statement (35) STATEMENTS OF PARTNERS CA (34)Cash Flows (35)!8 PAGE 1010 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (68)! NOTE 5 OIL AND GAS PRODUC (69)! 9 PAGE 1011 NOTE 6 RELATED PAR! 9 PAGE 1011 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (87) NOTE 7 OIL AND GAS INFORM (88) NOTE 7 OIL AND GAS INFORM (89)!11 PAGE 1013 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (34) SUPPLEMENTAL INFORMATION (30)Balance Sheet (35)Income Statement (36) STATEMENTS OF PARTNERS CA (35)Cash Flows (36)!8 PAGE 1029 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (70)! NOTE 5 OIL AND GAS PRODUC (71)! 9 PAGE 1030 NOTE 6 RELATED PAR! 9 PAGE 1030 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (90) NOTE 7 OIL AND GAS INFORM (91) NOTE 7 OIL AND GAS INFORM (92)! 11 PAGE 1032 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (35) SUPPLEMENTAL INFORMATION (31)Balance Sheet (36)Income Statement (37) STATEMENTS OF PARTNERS CA (36)Cash Flows (37)!8 PAGE 1048 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (72)! NOTE 5 OIL AND GAS PRODUC (73)! 9 PAGE 1049 NOTE 6 RELATED PAR! 9 PAGE 1049 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (93) NOTE 7 OIL AND GAS INFORM (94) NOTE 7 OIL AND GAS INFORM (95)! 11 PAGE 1051 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (36)!31 2000 1 PAGE 1058 PARKER PARSPARKER PARSLEY 90A LP ITEM 6 SELECTED FINANCIAL (18)INDEX TO FINANCIAL STATE (15)Balance Sheet (37)Income Statement (38) STATEMENTS OF PARTNERS CA (37)Cash Flows (38)!15 PAGE 1074 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (74)! NOTE 5 OIL AND GAS PRODUC (75)! NOTE 6 RELATED PARTY TRAN (10)! NOTE 6 RELATED PARTY TRAN (11) NOTE 7 OIL AND GAS INFORM (96) NOTE 7 OIL AND GAS INFORM (97)! 18 PAGE 1077 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (18)Beneficial Ownership (18)PARKER PARSLEY 90A LP (1)INDEX TO EXHIBITS (16)SELECTED FINANCIAL DATA (37) SUPPLEMENTAL INFORMATION (32)PARKER PARSLEY 90B CONV LP ITEM 6 SELECTED FINANCIAL (19)INDEX TO FINANCIAL STATE (16)Balance Sheet (38)Income Statement (39) STATEMENTS OF PARTNERS CA (38)Cash Flows (39)!16 PAGE 1105 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (76)! NOTE 5 OIL AND GAS PRODUC (77)! NOTE 6 RELATED PARTY TRAN (12)! NOTE 6 RELATED PARTY TRAN (13) NOTE 7 OIL AND GAS INFORM (98) NOTE 7 OIL AND GAS INFORM (99) NOTE 7 OIL AND GAS INFOR (100)! 19 PAGE 1108 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (19)Beneficial Ownership (19) PARKER PARSLEY 90B CONV LP (1)INDEX TO EXHIBITS (17)SELECTED FINANCIAL DATA (38)!31 2000 1 PAGE 1119 PARKER PARSPARKER PARSLEY 90B LP ITEM 6 SELECTED FINANCIAL (20)INDEX TO FINANCIAL STATE (17)Balance Sheet (39)Income Statement (40) STATEMENTS OF PARTNERS CA (39)Cash Flows (40)!16 PAGE 1136 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (78)! NOTE 5 OIL AND GAS PRODUC (79)! NOTE 6 RELATED PARTY TRAN (14)! NOTE 6 RELATED PARTY TRAN (15) NOTE 7 OIL AND GAS INFOR (101) NOTE 7 OIL AND GAS INFOR (102) NOTE 7 OIL AND GAS INFOR (103)! 19 PAGE 1139 NOTE 8 MAJOR CUS!ITEM 10 DIRECTORS AND EXEC (20)Beneficial Ownership (20)PARKER PARSLEY 90B LP (1)INDEX TO EXHIBITS (18)SELECTED FINANCIAL DATA (39) SUPPLEMENTAL INFORMATION (33)PARKER PARSLEY 90C CONV LP ITEM 6 SELECTED FINANCIAL (21)INDEX TO FINANCIAL STATE (18)Balance Sheet (40)Income Statement (41) STATEMENTS OF PARTNERS CA (40)Cash Flows (41)!15 PAGE 1166 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (80)! NOTE 5 OIL AND GAS PRODUC (81)! NOTE 6 RELATED PARTY TRAN (16)! NOTE 6 RELATED PARTY TRAN (17) NOTE 7 OIL AND GAS INFOR (104) NOTE 7 OIL AND GAS INFOR (105) NOTE 7 OIL AND GAS INFOR (106)! 18 PAGE 1169 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (21)Beneficial Ownership (21) PARKER PARSLEY 90C CONV LP (1)INDEX TO EXHIBITS (19)SELECTED FINANCIAL DATA (40)!31 2000 1 PAGE 1180 PARKER PARSPARKER PARSLEY 90C LP ITEM 6 SELECTED FINANCIAL (22)INDEX TO FINANCIAL STATE (19)Balance Sheet (41)Income Statement (42) STATEMENTS OF PARTNERS CA (41)Cash Flows (42)!15 PAGE 1196 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (82)! NOTE 5 OIL AND GAS PRODUC (83)! NOTE 6 RELATED PARTY TRAN (18)! NOTE 6 RELATED PARTY TRAN (19) NOTE 7 OIL AND GAS INFOR (107) NOTE 7 OIL AND GAS INFOR (108) NOTE 7 OIL AND GAS INFOR (109)! 18 PAGE 1199 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (22)Beneficial Ownership (22)PARKER PARSLEY 90C LP (1)INDEX TO EXHIBITS (20)SELECTED FINANCIAL DATA (41) SUPPLEMENTAL INFORMATION (34)Balance Sheet (42)Income Statement (43) STATEMENTS OF PARTNERS CA (42)Cash Flows (43)!8 PAGE 1219 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (84)! NOTE 5 OIL AND GAS PRODUC (85)! 9 PAGE 1220 NOTE 6 RELATED PAR! 9 PAGE 1220 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (110) NOTE 7 OIL AND GAS INFOR (111) NOTE 7 OIL AND GAS INFOR (112)! 11 PAGE 1222 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (42) SUPPLEMENTAL INFORMATION (35)Balance Sheet (43)Income Statement (44) STATEMENTS OF PARTNERS CA (43)Cash Flows (44)!8 PAGE 1238 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (86)! NOTE 5 OIL AND GAS PRODUC (87)! 9 PAGE 1239 NOTE 6 RELATED PAR! 9 PAGE 1239 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (113) NOTE 7 OIL AND GAS INFOR (114) NOTE 7 OIL AND GAS INFOR (115)! 11 PAGE 1241 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (43)!31 2000 1 PAGE 1248 PARKER PARSPARKER PARSLEY 91A LP ITEM 6 SELECTED FINANCIAL (23)INDEX TO FINANCIAL STATE (20)Balance Sheet (44)Income Statement (45) STATEMENTS OF PARTNERS CA (44)Cash Flows (45)!15 PAGE 1264 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (88)! NOTE 5 OIL AND GAS PRODUC (89)! NOTE 6 RELATED PARTY TRAN (20)! NOTE 6 RELATED PARTY TRAN (21) NOTE 7 OIL AND GAS INFOR (116) NOTE 7 OIL AND GAS INFOR (117) NOTE 7 OIL AND GAS INFOR (118)! 18 PAGE 1267 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (23)Beneficial Ownership (23)PARKER PARSLEY 91A LP (1)INDEX TO EXHIBITS (21)SELECTED FINANCIAL DATA (44)!31 2000 1 PAGE 1278 PARKER PARSPARKER PARSLEY 91B LP ITEM 6 SELECTED FINANCIAL (24)INDEX TO FINANCIAL STATE (21)Balance Sheet (45)Income Statement (46) STATEMENTS OF PARTNERS CA (45)Cash Flows (46)!15 PAGE 1294 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (90)! NOTE 5 OIL AND GAS PRODUC (91)! NOTE 6 RELATED PARTY TRAN (22)! NOTE 6 RELATED PARTY TRAN (23) NOTE 7 OIL AND GAS INFOR (119) NOTE 7 OIL AND GAS INFOR (120) NOTE 7 OIL AND GAS INFOR (121)! 18 PAGE 1297 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (24)Beneficial Ownership (24)PARKER PARSLEY 91B LP (1)INDEX TO EXHIBITS (22)SELECTED FINANCIAL DATA (45)POWER OF ATTORNEYPOWER OF ATTORNEY (1)POWER OF ATTORNEY (2)POWER OF ATTORNEY (3)POWER OF ATTORNEY (4)POWER OF ATTORNEY (5)POWER OF ATTORNEY (6)POWER OF ATTORNEY (7)!2001 THE BOARD OF DIRECTORS REC!2001 THE BOARD OF DIRECTORS (1)!2001 THE BOARD OF DIRECTORS (2)PAGE 2U } =}      $PIONEER NATURAL RESOURCES CO S-4 04/17/2001TABLE OF CONTENTS  Page   'QUESTIONS AND ANSWERS ABOUT THE% MERGER OF EACH PARTNERSHIPSUMMARY~  RISK FACTORS~ F6. Risk Factors Relating to the Merger of Each Partnership~ F0( The Merger Values Involve Estimates( that Will Not Be Adjusted~ F3+ The Number of Shares of Pioneer Common1) Stock the Limited Partners of Each4, Partnership Will Receive May Decrease4, Between Now and the Completion of the( Merger of the Partnership~ F2* Current Market Prices for Oil and Gas2* May Be Higher than the Merger Value2* for a Partnership, Which May Affect5- Deliverability of the Fairness Opinion~ F3+ You Were Not Independently RepresentedDglrZB*fEOs9 !"#$%&'()*+,-./0123456789:;<=>?6 . in Establishing the Terms of the Merger"! of Each Partnership~ !F6". The Interests of Pioneer, Pioneer USA and6#. Their Directors and Officers May Differ"$ From Your Interests~ $J4%, Pioneer USA Has Previously Offered Each9&1 Partnership for Sale to Others, But It Did*'" Not Receive Any Formal Bids~ 'J8(0 Potential Litigation Challenging the Merger6). of a Partnership May Delay or Block the* Merger~ *J6+. Repurchase Rights Terminate On Completion, of the Mergers~ ,J5-- You Could be Bound by the Merger of Each7./ Partnership in Which You Own an Interest2/* Even If You Do Not Vote in Favor of0 the Merger~ 0N11) Risks Associated With an Investment in2 Pioneer~ 2N03( Limited Partners Who Become Pioneer54- Stockholders Will Fundamentally Change-5% the Nature of Their Investment~ 5N06( Pioneer Might Not Declare Dividends~ 6N07( Limited Partners Who Become Pioneer*8" Stockholders May Be Diluted~ 8R79/ Dividends Paid to Pioneer Stockholders Are": Taxed at Two Levels~ :R8;0 Pioneer's Business Activities Involve Risks~ ;R<SPECIAL FACTORS~ <V7=/ Background of the Merger of Each Partnership~ =V5>- Reasons for the Merger of Each Partnership~ >j6?. Pioneer's Disclosure Relating to the MergerD lXu9b3^)Yl8|@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_ @ of Each Partnership~ @r(A Recommendation of Pioneer USA~ ArB Fairness Opinion~ Bv!C Summary Reserve Report~ C4D, Alternative Transactions to the Merger ofE Each Partnership~ E"FFORWARD-LOOKING STATEMENTS~ F$GMETHOD OF DETERMINING MERGER)H! VALUE FOR EACH PARTNERSHIP AND)I! AMOUNT OF PIONEER COMMON STOCKJ AND CASH OFFERED~ J.K& Components of Merger Value for EachL Partnership~ L.M& Allocation of Merger Value for Each.N& Partnership Among Partners of theO Partnership~ O.P& Other Methods of Determining MergerQ Values~ QR Information Sources~ R&STHE MERGER OF EACH PARTNERSHIP~ ST General~ T-U% Legal Opinion for Limited Partners~ U3V+ Distribution of Pioneer Common Stock andW Cash Payment~ WX Fractional Shares~ X+Y# Material U.S. Federal Income TaxZ Consequences~ Z[ Accounting Treatment~ [2\* Effect of Merger of Each Partnership on0]( Limited Partners Who Do Not Vote in1^) Favor of the Merger; No Appraisal or_ Dissenters' Rights~ _Dlg4qD\*yA|NY`abcdefghijklmnopqrstuvwxyz{|}~2`* Future of Nonparticipating Partnerships~ `/a' Nonmanaging General Partners of Someb Partnerships~ bc Third Party Offers~ cd Merger Amendment~ d4e, Termination of Registration and Reportingf Requirements~ f,g$ Elimination of a Fairness Opinion-h% Requirement That Would Otherwise i Benefit Pioneer USA~ ij Source of Funds~ j'k Payment of Expenses and Fees~ klTHE MERGER AGREEMENT~ l$m Structure; Effective Time~ m!n Effects of the Mergers~ n3o+ Conduct of Business Prior to the Mergers~ op Other Agreements~ p,q$ Representations and Warranties of*r" Pioneer, Pioneer USA and Eachs Partnership~ s7t/ Conditions to the Merger of Each Partnership~ t2u* Termination of the Merger Agreement and*v" the Merger of Any Partnership~ vw Amendments; Waivers~ wxTHE SPECIAL MEETINGS~ x"y Time and Place; Purpose~ y1z) Record Date; Voting Rights and Proxies~ z { Revocation of Proxies~ {"| Solicitation of Proxies~ |} Quorum~ }*~" Required Vote; Broker Non-Votes~ ~% Participation by Assignees~ Dl^/o> yCn@[+T 0( Special Requirements for Some Limited Partners~ " Validity of Proxy Cards~  Local Laws~ $COMPARATIVE PER SHARE MARKET)! PRICE AND DIVIDEND INFORMATION~ )!INTERESTS OF PIONEER, PIONEER USA" AND THEIR DIRECTORS AND OFFICERS~ :2 Conflicting Duties of Pioneer USA, Individually# and as General Partner~ $____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/$,qJ"o1=PF0*8X> @ l  84: dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/?? SECURITIES AND EXC!CALCULATION OF REGISTRATION FEETO BE HELD ON 2001TABLE OF CONTENTS LIST OF APPENDICES!LIMITED PARTNER INVESTMENT REPA!LIMITED PARTNER INVESTMENT (1) 5 PAGE 15 NYMEX FUTURES PRICES!EXAMPLE CALCULATION OF MERGER VIncome StatementIncome Statement (1)AT DECEMBER 31 2000!15 PAGE 25 COMPARATIVE PER SHAR!25 PAGE 35 REASONS FOR THE MERGFAIRNESS OPINIONFAIRNESS OPINION (1)!LEGAL OPINION FOR LIMITED PARTN!LEGAL OPINION FOR LIMITED P (1)!NONMANAGING GENERAL PARTNERS OF!49 PAGE 59 PAYMENT OF EXPENSES !58 PAGE 68 COMPARATIVE PER SHAR!60 PAGE 70 OWNERSHIP OF PARTNER PIONEER PIONEER USATHE DRILLING PARTNERSHIPSTHE DRILLING PARTNERSHIPS (1)THE INCOME PARTNERSHIPS INTERESTSINTERESTS (1)INTERESTS (2)INTERESTS (3)INTERESTS (4)INTERESTS (5)!WHERE YOU CAN FIND MORE INFORMAAS OF DECEMBER 31 2000YEAR ENDED DECEMBER 31 2000!QUANTITIES OF OIL AND GAS RESER!STANDARDIZED MEASURE OF DISCOUN CASH FLOWSAS OF MARCH 31 2001AS OF MARCH 31 2001 (1)AS OF MARCH 31 2001 (2)AS OF MARCH 31 2001 (3)AS OF MARCH 31 2001 (4)AS OF MARCH 31 2001 (5)!FROM INCEPTION THROUGH MARCH 31!ANNUAL REPURCHASE PRICES AND AGOF EACH PARTNERSHIP!FOR THE THREE MONTHS ENDED MARCAS OF DECEMBER 31 2000 (1)AS OF MARCH 31 2001 (6)!THE YEARS ENDED DECEMBER 31 200AS OF DECEMBER 31 2000 (2)DECEMBER 31 2000 AND 1999EFFECTIVE DECEMBER 31 2000 EFFECTIVE DECEMBER 31 2000 (1) RECITALS RECITALS (1) SUPPLEMENTAL INFORMATION TABLEBalance SheetIncome Statement (2) STATEMENTS OF PARTNERS CAPITALCash Flows (1)NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCING A! NOTE 5 OIL AND GAS PRODUCI (1)! NOTE 6 RELATED PARTY TRANSACTI! NOTE 6 RELATED PARTY TRANS (1)! NOTE 7 OIL AND GAS INFORMATION! NOTE 7 OIL AND GAS INFORMA (1)! NOTE 7 OIL AND GAS INFORMA (2)!11 PAGE 163 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA SUPPLEMENTAL INFORMATION T (1)Balance Sheet (1)Income Statement (3) STATEMENTS OF PARTNERS CAP (1)Cash Flows (2)NOTE 4 INCOME TAXES (1)! NOTE 5 OIL AND GAS PRODUCI (2)! NOTE 5 OIL AND GAS PRODUCI (3)! 9 PAGE 180 NOTE 6 RELATED PAR! 9 PAGE 180 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORMA (3)! NOTE 7 OIL AND GAS INFORMA (4)! NOTE 7 OIL AND GAS INFORMA (5)!11 PAGE 182 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (1) SUPPLEMENTAL INFORMATION T (2) ITEM 6 SELECTED FINANCIAL DATAINDEX TO FINANCIAL STATEMENTSBalance Sheet (2)Income Statement (4) STATEMENTS OF PARTNERS CAP (2)Cash Flows (3)!15 PAGE 205 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCI (4)! NOTE 5 OIL AND GAS PRODUCI (5)! NOTE 6 RELATED PARTY TRANS (2)! NOTE 6 RELATED PARTY TRANS (3)! NOTE 7 OIL AND GAS INFORMA (6)! NOTE 7 OIL AND GAS INFORMA (7)! NOTE 7 OIL AND GAS INFORMA (8)! NOTE 7 OIL AND GAS INFORMA (9)! NOTE 7 OIL AND GAS INFORM (10)! 18 PAGE 208 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECUTIVEBeneficial OwnershipPARKER PARSLEY 82I LTDINDEX TO EXHIBITSSELECTED FINANCIAL DATA (2) SUPPLEMENTAL INFORMATION T (3) ITEM 6 SELECTED FINANCIAL (1)INDEX TO FINANCIAL STATEM (1)Balance Sheet (3)Income Statement (5) STATEMENTS OF PARTNERS CAP (3)Cash Flows (4)NOTE 4 INCOME TAXES (2)! NOTE 5 OIL AND GAS PRODUCI (6)! NOTE 5 OIL AND GAS PRODUCI (7)! 16 PAGE 236 NOTE 6 RELATED PAR! 16 PAGE 236 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (11)! NOTE 7 OIL AND GAS INFORM (12)! NOTE 7 OIL AND GAS INFORM (13)!18 PAGE 238 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (1)Beneficial Ownership (1)PARKER PARSLEY 82II LTDINDEX TO EXHIBITS (1)SELECTED FINANCIAL DATA (3) SUPPLEMENTAL INFORMATION T (4)Balance Sheet (4)Income Statement (6) STATEMENTS OF PARTNERS CAP (4)Cash Flows (5)NOTE 4 INCOME TAXES (3)! NOTE 5 OIL AND GAS PRODUCI (8)! NOTE 5 OIL AND GAS PRODUCI (9)! 9 PAGE 259 NOTE 6 RELATED PART! 9 PAGE 259 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (14)! NOTE 7 OIL AND GAS INFORM (15)! NOTE 7 OIL AND GAS INFORM (16)!11 PAGE 261 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (4) SUPPLEMENTAL INFORMATION T (5)PARKER PARSLEY 83A LTD ITEM 6 SELECTED FINANCIAL (2)INDEX TO FINANCIAL STATEM (2)Balance Sheet (5)Income Statement (7) STATEMENTS OF PARTNERS CAP (5)Cash Flows (6)NOTE 4 INCOME TAXES (4)! NOTE 5 OIL AND GAS PRODUC (10)! NOTE 5 OIL AND GAS PRODUC (11)! 16 PAGE 285 NOTE 6 RELATED PAR! 16 PAGE 285 NOTE 6 RELATED (1)!NOTE 7 OIL AND GAS INFORMATION  NOTE 7 OIL AND GAS INFORMA (1) NOTE 7 OIL AND GAS INFORMA (2)! 18 PAGE 287 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECU (2)Beneficial Ownership (2)PARKER PARSLEY 83A LTD (1)INDEX TO EXHIBITS (2)SELECTED FINANCIAL DATA (5) SUPPLEMENTAL INFORMATION T (6)PARKER PARSLEY 83B LTD ITEM 6 SELECTED FINANCIAL (3)INDEX TO FINANCIAL STATEM (3)Balance Sheet (6)Income Statement (8) STATEMENTS OF PARTNERS CAP (6)Cash Flows (7)NOTE 4 INCOME TAXES (5)! NOTE 5 OIL AND GAS PRODUC (12)! NOTE 5 OIL AND GAS PRODUC (13)! 16 PAGE 315 NOTE 6 RELATED PAR! 16 PAGE 315 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (3) NOTE 7 OIL AND GAS INFORMA (4) NOTE 7 OIL AND GAS INFORMA (5)!18 PAGE 317 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (3)Beneficial Ownership (3)PARKER PARSLEY 83B LTD (1)INDEX TO EXHIBITS (3)SELECTED FINANCIAL DATA (6) SUPPLEMENTAL INFORMATION T (7)PARKER PARSLEY 84A LTD ITEM 6 SELECTED FINANCIAL (4)INDEX TO FINANCIAL STATEM (4)Balance Sheet (7)Income Statement (9) STATEMENTS OF PARTNERS CAP (7)Cash Flows (8)!15 PAGE 344 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (14)! NOTE 5 OIL AND GAS PRODUC (15)! 16 PAGE 345 NOTE 6 RELATED PAR! 16 PAGE 345 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (6) NOTE 7 OIL AND GAS INFORMA (7) NOTE 7 OIL AND GAS INFORMA (8)!18 PAGE 347 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (4)Beneficial Ownership (4)PARKER PARSLEY 84A LTD (1)INDEX TO EXHIBITS (4)SELECTED FINANCIAL DATA (7) SUPPLEMENTAL INFORMATION T (8)PARKER PARSLEY 85A LTD ITEM 6 SELECTED FINANCIAL (5)INDEX TO FINANCIAL STATEM (5)Balance Sheet (8)Income Statement (10) STATEMENTS OF PARTNERS CAP (8)Cash Flows (9)NOTE 4 INCOME TAXES (6)! NOTE 5 OIL AND GAS PRODUC (16)! NOTE 5 OIL AND GAS PRODUC (17)! 16 PAGE 375 NOTE 6 RELATED PAR! 16 PAGE 375 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (9) NOTE 7 OIL AND GAS INFORM (10) NOTE 7 OIL AND GAS INFORM (11)!18 PAGE 377 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (5)Beneficial Ownership (5)PARKER PARSLEY 85A LTD (1)INDEX TO EXHIBITS (5)SELECTED FINANCIAL DATA (8) SUPPLEMENTAL INFORMATION T (9)PARKER PARSLEY 85B LTD ITEM 6 SELECTED FINANCIAL (6)!7 PAGE 396 ITEM 8 FINANCIAL STABalance Sheet (9) STATEMENTS OF PARTNERS CAP (9)Cash Flows (10)!15 PAGE 404 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (18)! NOTE 5 OIL AND GAS PRODUC (19)! 16 PAGE 405 NOTE 6 RELATED PAR! 16 PAGE 405 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (12) NOTE 7 OIL AND GAS INFORM (13) NOTE 7 OIL AND GAS INFORM (14)!18 PAGE 407 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (6)Beneficial Ownership (6)PARKER PARSLEY 85B LTD (1)INDEX TO EXHIBITS (6)SELECTED FINANCIAL DATA (9) SUPPLEMENTAL INFORMATION (10)Balance Sheet (10)Income Statement (11) STATEMENTS OF PARTNERS CA (10)Cash Flows (11)NOTE 4 INCOME TAXES (7)! NOTE 5 OIL AND GAS PRODUC (20)! NOTE 5 OIL AND GAS PRODUC (21)! 9 PAGE 428 NOTE 6 RELATED PART! 9 PAGE 428 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (15) NOTE 7 OIL AND GAS INFORM (16) NOTE 7 OIL AND GAS INFORM (17)! 11 PAGE 430 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (10) SUPPLEMENTAL INFORMATION (11)Balance Sheet (11)Income Statement (12) STATEMENTS OF PARTNERS CA (11)Cash Flows (12) 8 PAGE 446 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (22)! NOTE 5 OIL AND GAS PRODUC (23)! 9 PAGE 447 NOTE 6 RELATED PART! 9 PAGE 447 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (18) NOTE 7 OIL AND GAS INFORM (19) NOTE 7 OIL AND GAS INFORM (20)! 11 PAGE 449 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (11) SUPPLEMENTAL INFORMATION (12)PARKER PARSLEY 86A LTD ITEM 6 SELECTED FINANCIAL (7)INDEX TO FINANCIAL STATEM (6)Balance Sheet (12)Income Statement (13) STATEMENTS OF PARTNERS CA (12)Cash Flows (13)NOTE 4 INCOME TAXES (8)! NOTE 5 OIL AND GAS PRODUC (24)! NOTE 5 OIL AND GAS PRODUC (25)! 16 PAGE 473 NOTE 6 RELATED PAR! 16 PAGE 473 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (21) NOTE 7 OIL AND GAS INFORM (22) NOTE 7 OIL AND GAS INFORM (23)!18 PAGE 475 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (7)Beneficial Ownership (7)PARKER PARSLEY 86A LTD (1)INDEX TO EXHIBITS (7)SELECTED FINANCIAL DATA (12) SUPPLEMENTAL INFORMATION (13)PARKER PARSLEY 86B LTD ITEM 6 SELECTED FINANCIAL (8)INDEX TO FINANCIAL STATEM (7)Balance Sheet (13)Income Statement (14) STATEMENTS OF PARTNERS CA (13)Cash Flows (14)!16 PAGE 503 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (26)! NOTE 5 OIL AND GAS PRODUC (27)! NOTE 6 RELATED PARTY TRANS (4)! NOTE 6 RELATED PARTY TRANS (5) NOTE 7 OIL AND GAS INFORM (24) NOTE 7 OIL AND GAS INFORM (25) NOTE 7 OIL AND GAS INFORM (26)!19 PAGE 506 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (8)Beneficial Ownership (8)PARKER PARSLEY 86B LTD (1)INDEX TO EXHIBITS (8)SELECTED FINANCIAL DATA (13) SUPPLEMENTAL INFORMATION (14) ITEM 6 SELECTED FINANCIAL (9)!7 PAGE 525 ITEM 8 FINANCIAL STABalance Sheet (14)Income Statement (15) STATEMENTS OF PARTNERS CA (14)Cash Flows (15)NOTE 4 INCOME TAXES (9)! NOTE 5 OIL AND GAS PRODUC (28)! NOTE 5 OIL AND GAS PRODUC (29)! 16 PAGE 534 NOTE 6 RELATED PAR! 16 PAGE 534 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (27) NOTE 7 OIL AND GAS INFORM (28) NOTE 7 OIL AND GAS INFORM (29)!18 PAGE 536 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (9)Beneficial Ownership (9)PARKER PARSLEY 86C LTDSELECTED FINANCIAL DATA (14) SUPPLEMENTAL INFORMATION (15)Balance Sheet (15)Income Statement (16) STATEMENTS OF PARTNERS CA (15)Cash Flows (16) 8 PAGE 556 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (30)! NOTE 5 OIL AND GAS PRODUC (31)! NOTE 6 RELATED PARTY TRANS (6)! NOTE 6 RELATED PARTY TRANS (7) NOTE 7 OIL AND GAS INFORM (30) NOTE 7 OIL AND GAS INFORM (31) NOTE 7 OIL AND GAS INFORM (32)! 11 PAGE 559 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (15) SUPPLEMENTAL INFORMATION (16)Balance Sheet (16)Income Statement (17) STATEMENTS OF PARTNERS CA (16)Cash Flows (17)NOTE 4 INCOME TAXES (10)! NOTE 5 OIL AND GAS PRODUC (32)! NOTE 5 OIL AND GAS PRODUC (33)! 9 PAGE 576 NOTE 6 RELATED PART! 9 PAGE 576 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (33) NOTE 7 OIL AND GAS INFORM (34) NOTE 7 OIL AND GAS INFORM (35)!11 PAGE 578 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (16) SUPPLEMENTAL INFORMATION (17) ITEM 6 SELECTED FINANCIAL (10)!8 PAGE 594 ITEM 8 FINANCIAL STABalance Sheet (17)Income Statement (18) STATEMENTS OF PARTNERS CA (17)Cash Flows (18)NOTE 4 INCOME TAXES (11)! NOTE 5 OIL AND GAS PRODUC (34)! NOTE 5 OIL AND GAS PRODUC (35)! 17 PAGE 603 NOTE 6 RELATED PAR! 17 PAGE 603 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (36) NOTE 7 OIL AND GAS INFORM (37) NOTE 7 OIL AND GAS INFORM (38)! 19 PAGE 605 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (10)Beneficial Ownership (10)PARKER PARSLEY 87A LTDSELECTED FINANCIAL DATA (17) SUPPLEMENTAL INFORMATION (18)Balance Sheet (18)Income Statement (19) STATEMENTS OF PARTNERS CA (18)Cash Flows (19) 8 PAGE 625 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (36)! NOTE 5 OIL AND GAS PRODUC (37)! 9 PAGE 626 NOTE 6 RELATED PART! 9 PAGE 626 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (39) NOTE 7 OIL AND GAS INFORM (40) NOTE 7 OIL AND GAS INFORM (41)! 11 PAGE 628 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (18) SUPPLEMENTAL INFORMATION (19) ITEM 6 SELECTED FINANCIAL (11)INDEX TO FINANCIAL STATEM (8)Balance Sheet (19)Income Statement (20) STATEMENTS OF PARTNERS CA (19)Cash Flows (20)NOTE 4 INCOME TAXES (12)! NOTE 5 OIL AND GAS PRODUC (38)! NOTE 5 OIL AND GAS PRODUC (39)! 17 PAGE 653 NOTE 6 RELATED PAR! 17 PAGE 653 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (42) NOTE 7 OIL AND GAS INFORM (43) NOTE 7 OIL AND GAS INFORM (44)! 19 PAGE 655 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (11)Beneficial Ownership (11)PARKER PARSLEY 87B LTDINDEX TO EXHIBITS (9)SELECTED FINANCIAL DATA (19) SUPPLEMENTAL INFORMATION (20) ITEM 6 SELECTED FINANCIAL (12)INDEX TO FINANCIAL STATEM (9)Balance Sheet (20)Income Statement (21) STATEMENTS OF PARTNERS CA (20)Cash Flows (21)!16 PAGE 683 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (40)! NOTE 5 OIL AND GAS PRODUC (41)! NOTE 6 RELATED PARTY TRANS (8)! NOTE 6 RELATED PARTY TRANS (9) NOTE 7 OIL AND GAS INFORM (45) NOTE 7 OIL AND GAS INFORM (46) NOTE 7 OIL AND GAS INFORM (47)!19 PAGE 686 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (12)Beneficial Ownership (12)PROPERTIES 87A LTDINDEX TO EXHIBITS (10)SELECTED FINANCIAL DATA (20) SUPPLEMENTAL INFORMATION (21) ITEM 6 SELECTED FINANCIAL (13)INDEX TO FINANCIAL STATE (10)Balance Sheet (21)Income Statement (22) STATEMENTS OF PARTNERS CA (21)Cash Flows (22)!16 PAGE 714 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (42)! NOTE 5 OIL AND GAS PRODUC (43)! 17 PAGE 715 NOTE 6 RELATED PAR! 17 PAGE 715 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (48) NOTE 7 OIL AND GAS INFORM (49) NOTE 7 OIL AND GAS INFORM (50)! 19 PAGE 717 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (13)Beneficial Ownership (13)PROPERTIES 87B LTDINDEX TO EXHIBITS (11)SELECTED FINANCIAL DATA (21) SUPPLEMENTAL INFORMATION (22)Balance Sheet (22)Income Statement (23) STATEMENTS OF PARTNERS CA (22)Cash Flows (23) 8 PAGE 737 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (44)! NOTE 5 OIL AND GAS PRODUC (45)! 9 PAGE 738 NOTE 6 RELATED PART! 9 PAGE 738 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (51) NOTE 7 OIL AND GAS INFORM (52) NOTE 7 OIL AND GAS INFORM (53)! 11 PAGE 740 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (22) SUPPLEMENTAL INFORMATION (23)Balance Sheet (23)Income Statement (24) STATEMENTS OF PARTNERS CA (23)Cash Flows (24) 8 PAGE 756 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (46)! NOTE 5 OIL AND GAS PRODUC (47)! 9 PAGE 757 NOTE 6 RELATED PART! 9 PAGE 757 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (54) NOTE 7 OIL AND GAS INFORM (55) NOTE 7 OIL AND GAS INFORM (56)! 11 PAGE 759 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (23)!31 2000 1 PAGE 766 PARKER PARSLPARKER PARSLEY 88A LP ITEM 6 SELECTED FINANCIAL (14)INDEX TO FINANCIAL STATE (11)Balance Sheet (24)Income Statement (25) STATEMENTS OF PARTNERS CA (24)Cash Flows (25)NOTE 4 INCOME TAXES (13)! NOTE 5 OIL AND GAS PRODUC (48)! NOTE 5 OIL AND GAS PRODUC (49)! 16 PAGE 783 NOTE 6 RELATED PAR! 16 PAGE 783 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (57) NOTE 7 OIL AND GAS INFORM (58) NOTE 7 OIL AND GAS INFORM (59)! 18 PAGE 785 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (14)Beneficial Ownership (14)PARKER PARSLEY 88A LP (1)INDEX TO EXHIBITS (12)SELECTED FINANCIAL DATA (24) SUPPLEMENTAL INFORMATION (24)Balance Sheet (25)Income Statement (26) STATEMENTS OF PARTNERS CA (25)Cash Flows (26) 8 PAGE 805 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (50)! NOTE 5 OIL AND GAS PRODUC (51)! 9 PAGE 806 NOTE 6 RELATED PART! 9 PAGE 806 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (60) NOTE 7 OIL AND GAS INFORM (61) NOTE 7 OIL AND GAS INFORM (62)! 11 PAGE 808 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (25)!31 2000 1 PAGE 815 PARKER PARSLPARKER PARSLEY 88B LP ITEM 6 SELECTED FINANCIAL (15)INDEX TO FINANCIAL STATE (12)Balance Sheet (26)Income Statement (27) STATEMENTS OF PARTNERS CA (26)Cash Flows (27)!16 PAGE 832 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (52)! NOTE 5 OIL AND GAS PRODUC (53)! 17 PAGE 833 NOTE 6 RELATED PAR! 17 PAGE 833 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (63) NOTE 7 OIL AND GAS INFORM (64) NOTE 7 OIL AND GAS INFORM (65)! 19 PAGE 835 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (15)Beneficial Ownership (15)PARKER PARSLEY 88B LP (1)INDEX TO EXHIBITS (13)SELECTED FINANCIAL DATA (26) SUPPLEMENTAL INFORMATION (25)Balance Sheet (27)Income Statement (28) STATEMENTS OF PARTNERS CA (27)Cash Flows (28) 8 PAGE 855 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (54)! NOTE 5 OIL AND GAS PRODUC (55)! 9 PAGE 856 NOTE 6 RELATED PART! 9 PAGE 856 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (66) NOTE 7 OIL AND GAS INFORM (67) NOTE 7 OIL AND GAS INFORM (68)! 11 PAGE 858 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (27)!31 2000 1 PAGE 865 PARKER PARSLBalance Sheet (28)Income Statement (29) STATEMENTS OF PARTNERS CA (28)Cash Flows (29) 8 PAGE 874 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (56)! NOTE 5 OIL AND GAS PRODUC (57)! 9 PAGE 875 NOTE 6 RELATED PART! 9 PAGE 875 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (69) NOTE 7 OIL AND GAS INFORM (70) NOTE 7 OIL AND GAS INFORM (71)! 11 PAGE 877 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (28) SUPPLEMENTAL INFORMATION (26)!PARKER PARSLEY PRODUCING PROPER ITEM 6 SELECTED FINANCIAL (16)INDEX TO FINANCIAL STATE (13)Balance Sheet (29)Income Statement (30) STATEMENTS OF PARTNERS CA (29)Cash Flows (30)NOTE 4 INCOME TAXES (14)! NOTE 5 OIL AND GAS PRODUC (58)! NOTE 5 OIL AND GAS PRODUC (59)! 16 PAGE 901 NOTE 6 RELATED PAR! 16 PAGE 901 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (72) NOTE 7 OIL AND GAS INFORM (73)!18 PAGE 903 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (16)Beneficial Ownership (16)PROPERTIES 88A LPINDEX TO EXHIBITS (14)SELECTED FINANCIAL DATA (29) SUPPLEMENTAL INFORMATION (27)Balance Sheet (30)Income Statement (31) STATEMENTS OF PARTNERS CA (30)Cash Flows (31)NOTE 4 INCOME TAXES (15)! NOTE 5 OIL AND GAS PRODUC (60)! NOTE 5 OIL AND GAS PRODUC (61)! 9 PAGE 924 NOTE 6 RELATED PART! 9 PAGE 924 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (74) NOTE 7 OIL AND GAS INFORM (75) NOTE 7 OIL AND GAS INFORM (76)! 11 PAGE 926 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (30) SUPPLEMENTAL INFORMATION (28)Balance Sheet (31)Income Statement (32) STATEMENTS OF PARTNERS CA (31)Cash Flows (32)NOTE 4 INCOME TAXES (16)! NOTE 5 OIL AND GAS PRODUC (62)! NOTE 5 OIL AND GAS PRODUC (63)! 9 PAGE 943 NOTE 6 RELATED PART! 9 PAGE 943 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (77) NOTE 7 OIL AND GAS INFORM (78) NOTE 7 OIL AND GAS INFORM (79)!11 PAGE 945 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (31)!31 2000 1 PAGE 952 PARKER PARSLPARKER PARSLEY 89A LP ITEM 6 SELECTED FINANCIAL (17)INDEX TO FINANCIAL STATE (14)Balance Sheet (32)Income Statement (33) STATEMENTS OF PARTNERS CA (32)Cash Flows (33)NOTE 4 INCOME TAXES (17)! NOTE 5 OIL AND GAS PRODUC (64)! NOTE 5 OIL AND GAS PRODUC (65)! 16 PAGE 969 NOTE 6 RELATED PAR! 16 PAGE 969 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (80) NOTE 7 OIL AND GAS INFORM (81) NOTE 7 OIL AND GAS INFORM (82) NOTE 7 OIL AND GAS INFORM (83)! 18 PAGE 971 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (17)Beneficial Ownership (17)PARKER PARSLEY 89A LP (1)INDEX TO EXHIBITS (15)SELECTED FINANCIAL DATA (32) SUPPLEMENTAL INFORMATION (29)Balance Sheet (33)Income Statement (34) STATEMENTS OF PARTNERS CA (33)Cash Flows (34) 8 PAGE 991 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (66)! NOTE 5 OIL AND GAS PRODUC (67)! 9 PAGE 992 NOTE 6 RELATED PART! 9 PAGE 992 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (84) NOTE 7 OIL AND GAS INFORM (85) NOTE 7 OIL AND GAS INFORM (86)! 11 PAGE 994 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (33)!31 2000 1 PAGE 1001 PARKER PARSBalance Sheet (34)Income Statement (35) STATEMENTS OF PARTNERS CA (34)Cash Flows (35)!8 PAGE 1010 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (68)! NOTE 5 OIL AND GAS PRODUC (69)! 9 PAGE 1011 NOTE 6 RELATED PAR! 9 PAGE 1011 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (87) NOTE 7 OIL AND GAS INFORM (88) NOTE 7 OIL AND GAS INFORM (89)!11 PAGE 1013 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (34) SUPPLEMENTAL INFORMATION (30)Balance Sheet (35)Income Statement (36) STATEMENTS OF PARTNERS CA (35)Cash Flows (36)!8 PAGE 1029 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (70)! NOTE 5 OIL AND GAS PRODUC (71)! 9 PAGE 1030 NOTE 6 RELATED PAR! 9 PAGE 1030 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (90) NOTE 7 OIL AND GAS INFORM (91) NOTE 7 OIL AND GAS INFORM (92)! 11 PAGE 1032 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (35) SUPPLEMENTAL INFORMATION (31)Balance Sheet (36)Income Statement (37) STATEMENTS OF PARTNERS CA (36)Cash Flows (37)!8 PAGE 1048 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (72)! NOTE 5 OIL AND GAS PRODUC (73)! 9 PAGE 1049 NOTE 6 RELATED PAR! 9 PAGE 1049 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (93) NOTE 7 OIL AND GAS INFORM (94) NOTE 7 OIL AND GAS INFORM (95)! 11 PAGE 1051 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (36)!31 2000 1 PAGE 1058 PARKER PARSPARKER PARSLEY 90A LP ITEM 6 SELECTED FINANCIAL (18)INDEX TO FINANCIAL STATE (15)Balance Sheet (37)Income Statement (38) STATEMENTS OF PARTNERS CA (37)Cash Flows (38)!15 PAGE 1074 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (74)! NOTE 5 OIL AND GAS PRODUC (75)! NOTE 6 RELATED PARTY TRAN (10)! NOTE 6 RELATED PARTY TRAN (11) NOTE 7 OIL AND GAS INFORM (96) NOTE 7 OIL AND GAS INFORM (97)! 18 PAGE 1077 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (18)Beneficial Ownership (18)PARKER PARSLEY 90A LP (1)INDEX TO EXHIBITS (16)SELECTED FINANCIAL DATA (37) SUPPLEMENTAL INFORMATION (32)PARKER PARSLEY 90B CONV LP ITEM 6 SELECTED FINANCIAL (19)INDEX TO FINANCIAL STATE (16)Balance Sheet (38)Income Statement (39) STATEMENTS OF PARTNERS CA (38)Cash Flows (39)!16 PAGE 1105 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (76)! NOTE 5 OIL AND GAS PRODUC (77)! NOTE 6 RELATED PARTY TRAN (12)! NOTE 6 RELATED PARTY TRAN (13) NOTE 7 OIL AND GAS INFORM (98) NOTE 7 OIL AND GAS INFORM (99) NOTE 7 OIL AND GAS INFOR (100)! 19 PAGE 1108 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (19)Beneficial Ownership (19) PARKER PARSLEY 90B CONV LP (1)INDEX TO EXHIBITS (17)SELECTED FINANCIAL DATA (38)!31 2000 1 PAGE 1119 PARKER PARSPARKER PARSLEY 90B LP ITEM 6 SELECTED FINANCIAL (20)INDEX TO FINANCIAL STATE (17)Balance Sheet (39)Income Statement (40) STATEMENTS OF PARTNERS CA (39)Cash Flows (40)!16 PAGE 1136 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (78)! NOTE 5 OIL AND GAS PRODUC (79)! NOTE 6 RELATED PARTY TRAN (14)! NOTE 6 RELATED PARTY TRAN (15) NOTE 7 OIL AND GAS INFOR (101) NOTE 7 OIL AND GAS INFOR (102) NOTE 7 OIL AND GAS INFOR (103)! 19 PAGE 1139 NOTE 8 MAJOR CUS!ITEM 10 DIRECTORS AND EXEC (20)Beneficial Ownership (20)PARKER PARSLEY 90B LP (1)INDEX TO EXHIBITS (18)SELECTED FINANCIAL DATA (39) SUPPLEMENTAL INFORMATION (33)PARKER PARSLEY 90C CONV LP ITEM 6 SELECTED FINANCIAL (21)INDEX TO FINANCIAL STATE (18)Balance Sheet (40)Income Statement (41) STATEMENTS OF PARTNERS CA (40)Cash Flows (41)!15 PAGE 1166 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (80)! NOTE 5 OIL AND GAS PRODUC (81)! NOTE 6 RELATED PARTY TRAN (16)! NOTE 6 RELATED PARTY TRAN (17) NOTE 7 OIL AND GAS INFOR (104) NOTE 7 OIL AND GAS INFOR (105) NOTE 7 OIL AND GAS INFOR (106)! 18 PAGE 1169 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (21)Beneficial Ownership (21) PARKER PARSLEY 90C CONV LP (1)INDEX TO EXHIBITS (19)SELECTED FINANCIAL DATA (40)!31 2000 1 PAGE 1180 PARKER PARSPARKER PARSLEY 90C LP ITEM 6 SELECTED FINANCIAL (22)INDEX TO FINANCIAL STATE (19)Balance Sheet (41)Income Statement (42) STATEMENTS OF PARTNERS CA (41)Cash Flows (42)!15 PAGE 1196 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (82)! NOTE 5 OIL AND GAS PRODUC (83)! NOTE 6 RELATED PARTY TRAN (18)! NOTE 6 RELATED PARTY TRAN (19) NOTE 7 OIL AND GAS INFOR (107) NOTE 7 OIL AND GAS INFOR (108) NOTE 7 OIL AND GAS INFOR (109)! 18 PAGE 1199 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (22)Beneficial Ownership (22)PARKER PARSLEY 90C LP (1)INDEX TO EXHIBITS (20)SELECTED FINANCIAL DATA (41) SUPPLEMENTAL INFORMATION (34)Balance Sheet (42)Income Statement (43) STATEMENTS OF PARTNERS CA (42)Cash Flows (43)!8 PAGE 1219 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (84)! NOTE 5 OIL AND GAS PRODUC (85)! 9 PAGE 1220 NOTE 6 RELATED PAR! 9 PAGE 1220 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (110) NOTE 7 OIL AND GAS INFOR (111) NOTE 7 OIL AND GAS INFOR (112)! 11 PAGE 1222 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (42) SUPPLEMENTAL INFORMATION (35)Balance Sheet (43)Income Statement (44) STATEMENTS OF PARTNERS CA (43)Cash Flows (44)!8 PAGE 1238 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (86)! NOTE 5 OIL AND GAS PRODUC (87)! 9 PAGE 1239 NOTE 6 RELATED PAR! 9 PAGE 1239 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (113) NOTE 7 OIL AND GAS INFOR (114) NOTE 7 OIL AND GAS INFOR (115)! 11 PAGE 1241 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (43)!31 2000 1 PAGE 1248 PARKER PARSPARKER PARSLEY 91A LP ITEM 6 SELECTED FINANCIAL (23)INDEX TO FINANCIAL STATE (20)Balance Sheet (44)Income Statement (45) STATEMENTS OF PARTNERS CA (44)Cash Flows (45)!15 PAGE 1264 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (88)! NOTE 5 OIL AND GAS PRODUC (89)! NOTE 6 RELATED PARTY TRAN (20)! NOTE 6 RELATED PARTY TRAN (21) NOTE 7 OIL AND GAS INFOR (116) NOTE 7 OIL AND GAS INFOR (117) NOTE 7 OIL AND GAS INFOR (118)! 18 PAGE 1267 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (23)Beneficial Ownership (23)PARKER PARSLEY 91A LP (1)INDEX TO EXHIBITS (21)SELECTED FINANCIAL DATA (44)!31 2000 1 PAGE 1278 PARKER PARSPARKER PARSLEY 91B LP ITEM 6 SELECTED FINANCIAL (24)INDEX TO FINANCIAL STATE (21)Balance Sheet (45)Income Statement (46) STATEMENTS OF PARTNERS CA (45)Cash Flows (46)!15 PAGE 1294 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (90)! NOTE 5 OIL AND GAS PRODUC (91)! NOTE 6 RELATED PARTY TRAN (22)! NOTE 6 RELATED PARTY TRAN (23) NOTE 7 OIL AND GAS INFOR (119) NOTE 7 OIL AND GAS INFOR (120) NOTE 7 OIL AND GAS INFOR (121)! 18 PAGE 1297 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (24)Beneficial Ownership (24)PARKER PARSLEY 91B LP (1)INDEX TO EXHIBITS (22)SELECTED FINANCIAL DATA (45)POWER OF ATTORNEYPOWER OF ATTORNEY (1)POWER OF ATTORNEY (2)POWER OF ATTORNEY (3)POWER OF ATTORNEY (4)POWER OF ATTORNEY (5)POWER OF ATTORNEY (6)POWER OF ATTORNEY (7)!2001 THE BOARD OF DIRECTORS REC!2001 THE BOARD OF DIRECTORS (1)!2001 THE BOARD OF DIRECTORS (2)PAGE 2U } :}  8    $PIONEER NATURAL RESOURCES CO S-4 04/17/2001 7  Page   3+ Pioneer USA's Employees Provide Services  to the Partnerships~ 80 Financial Interests of Directors and Officers~ 0( The Partnerships Pay Operator Fees to Pioneer USA~  OWNERSHIP OF PARTNERSHIP INTERESTS~ TRANSACTIONS AMONG THE-% PARTNERSHIPS, PIONEER, PIONEER USA" AND THEIR DIRECTORS AND OFFICERS~  MANAGEMENT~  Pioneer~  Pioneer USA~ PIONEER~ .& Key Projects to Increase Production~  More Information~ THE PARTNERSHIPS~  Dl{cK3ftR!fE !"#$%&'()*+,-./01234567  General~  $! The Drilling Partnerships~ ! "" The Income Partnerships~ "#COMPARISON OF RIGHTS OF$$ STOCKHOLDERS AND PARTNERS~ $% General~ %3&+ Summary Comparison of Terms of Shares of1') Pioneer Common Stock and Partnership( Interests~ ()LEGAL MATTERS~ )& *INDEPENDENT AUDITORS AND + INDEPENDENT PETROLEUM, CONSULTANTS~ ,&-WHERE YOU CAN FIND MORE. INFORMATION~ .*/COMMONLY USED OIL AND0 GAS TERMS~ 02$1UNAUDITED PRO FORMA COMBINED2 FINANCIAL STATEMENTS 2P-134$5____________________________16)Created by Morningstar Document Research.07(http://documentresearch.morningstar.com/4rOa:^8=PF0*8X> @776655 l  J{ dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/?? SECURITIES AND EXC!CALCULATION OF REGISTRATION FEETO BE HELD ON 2001TABLE OF CONTENTSPAGE 7!LIMITED PARTNER INVESTMENT REPA!LIMITED PARTNER INVESTMENT (1) 5 PAGE 15 NYMEX FUTURES PRICES!EXAMPLE CALCULATION OF MERGER VIncome StatementIncome Statement (1)AT DECEMBER 31 2000!15 PAGE 25 COMPARATIVE PER SHAR!25 PAGE 35 REASONS FOR THE MERGFAIRNESS OPINIONFAIRNESS OPINION (1)!LEGAL OPINION FOR LIMITED PARTN!LEGAL OPINION FOR LIMITED P (1)!NONMANAGING GENERAL PARTNERS OF!49 PAGE 59 PAYMENT OF EXPENSES !58 PAGE 68 COMPARATIVE PER SHAR!60 PAGE 70 OWNERSHIP OF PARTNER PIONEER PIONEER USATHE DRILLING PARTNERSHIPSTHE DRILLING PARTNERSHIPS (1)THE INCOME PARTNERSHIPS INTERESTSINTERESTS (1)INTERESTS (2)INTERESTS (3)INTERESTS (4)INTERESTS (5)!WHERE YOU CAN FIND MORE INFORMAAS OF DECEMBER 31 2000YEAR ENDED DECEMBER 31 2000!QUANTITIES OF OIL AND GAS RESER!STANDARDIZED MEASURE OF DISCOUN CASH FLOWSAS OF MARCH 31 2001AS OF MARCH 31 2001 (1)AS OF MARCH 31 2001 (2)AS OF MARCH 31 2001 (3)AS OF MARCH 31 2001 (4)AS OF MARCH 31 2001 (5)!FROM INCEPTION THROUGH MARCH 31!ANNUAL REPURCHASE PRICES AND AGOF EACH PARTNERSHIP!FOR THE THREE MONTHS ENDED MARCAS OF DECEMBER 31 2000 (1)AS OF MARCH 31 2001 (6)!THE YEARS ENDED DECEMBER 31 200AS OF DECEMBER 31 2000 (2)DECEMBER 31 2000 AND 1999EFFECTIVE DECEMBER 31 2000 EFFECTIVE DECEMBER 31 2000 (1) RECITALS RECITALS (1) SUPPLEMENTAL INFORMATION TABLEBalance SheetIncome Statement (2) STATEMENTS OF PARTNERS CAPITALCash Flows (1)NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCING A! NOTE 5 OIL AND GAS PRODUCI (1)! NOTE 6 RELATED PARTY TRANSACTI! NOTE 6 RELATED PARTY TRANS (1)! NOTE 7 OIL AND GAS INFORMATION! NOTE 7 OIL AND GAS INFORMA (1)! NOTE 7 OIL AND GAS INFORMA (2)!11 PAGE 163 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA SUPPLEMENTAL INFORMATION T (1)Balance Sheet (1)Income Statement (3) STATEMENTS OF PARTNERS CAP (1)Cash Flows (2)NOTE 4 INCOME TAXES (1)! NOTE 5 OIL AND GAS PRODUCI (2)! NOTE 5 OIL AND GAS PRODUCI (3)! 9 PAGE 180 NOTE 6 RELATED PAR! 9 PAGE 180 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORMA (3)! NOTE 7 OIL AND GAS INFORMA (4)! NOTE 7 OIL AND GAS INFORMA (5)!11 PAGE 182 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (1) SUPPLEMENTAL INFORMATION T (2) ITEM 6 SELECTED FINANCIAL DATAINDEX TO FINANCIAL STATEMENTSBalance Sheet (2)Income Statement (4) STATEMENTS OF PARTNERS CAP (2)Cash Flows (3)!15 PAGE 205 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCI (4)! NOTE 5 OIL AND GAS PRODUCI (5)! NOTE 6 RELATED PARTY TRANS (2)! NOTE 6 RELATED PARTY TRANS (3)! NOTE 7 OIL AND GAS INFORMA (6)! NOTE 7 OIL AND GAS INFORMA (7)! NOTE 7 OIL AND GAS INFORMA (8)! NOTE 7 OIL AND GAS INFORMA (9)! NOTE 7 OIL AND GAS INFORM (10)! 18 PAGE 208 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECUTIVEBeneficial OwnershipPARKER PARSLEY 82I LTDINDEX TO EXHIBITSSELECTED FINANCIAL DATA (2) SUPPLEMENTAL INFORMATION T (3) ITEM 6 SELECTED FINANCIAL (1)INDEX TO FINANCIAL STATEM (1)Balance Sheet (3)Income Statement (5) STATEMENTS OF PARTNERS CAP (3)Cash Flows (4)NOTE 4 INCOME TAXES (2)! NOTE 5 OIL AND GAS PRODUCI (6)! NOTE 5 OIL AND GAS PRODUCI (7)! 16 PAGE 236 NOTE 6 RELATED PAR! 16 PAGE 236 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (11)! NOTE 7 OIL AND GAS INFORM (12)! NOTE 7 OIL AND GAS INFORM (13)!18 PAGE 238 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (1)Beneficial Ownership (1)PARKER PARSLEY 82II LTDINDEX TO EXHIBITS (1)SELECTED FINANCIAL DATA (3) SUPPLEMENTAL INFORMATION T (4)Balance Sheet (4)Income Statement (6) STATEMENTS OF PARTNERS CAP (4)Cash Flows (5)NOTE 4 INCOME TAXES (3)! NOTE 5 OIL AND GAS PRODUCI (8)! NOTE 5 OIL AND GAS PRODUCI (9)! 9 PAGE 259 NOTE 6 RELATED PART! 9 PAGE 259 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (14)! NOTE 7 OIL AND GAS INFORM (15)! NOTE 7 OIL AND GAS INFORM (16)!11 PAGE 261 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (4) SUPPLEMENTAL INFORMATION T (5)PARKER PARSLEY 83A LTD ITEM 6 SELECTED FINANCIAL (2)INDEX TO FINANCIAL STATEM (2)Balance Sheet (5)Income Statement (7) STATEMENTS OF PARTNERS CAP (5)Cash Flows (6)NOTE 4 INCOME TAXES (4)! NOTE 5 OIL AND GAS PRODUC (10)! NOTE 5 OIL AND GAS PRODUC (11)! 16 PAGE 285 NOTE 6 RELATED PAR! 16 PAGE 285 NOTE 6 RELATED (1)!NOTE 7 OIL AND GAS INFORMATION  NOTE 7 OIL AND GAS INFORMA (1) NOTE 7 OIL AND GAS INFORMA (2)! 18 PAGE 287 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECU (2)Beneficial Ownership (2)PARKER PARSLEY 83A LTD (1)INDEX TO EXHIBITS (2)SELECTED FINANCIAL DATA (5) SUPPLEMENTAL INFORMATION T (6)PARKER PARSLEY 83B LTD ITEM 6 SELECTED FINANCIAL (3)INDEX TO FINANCIAL STATEM (3)Balance Sheet (6)Income Statement (8) STATEMENTS OF PARTNERS CAP (6)Cash Flows (7)NOTE 4 INCOME TAXES (5)! NOTE 5 OIL AND GAS PRODUC (12)! NOTE 5 OIL AND GAS PRODUC (13)! 16 PAGE 315 NOTE 6 RELATED PAR! 16 PAGE 315 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (3) NOTE 7 OIL AND GAS INFORMA (4) NOTE 7 OIL AND GAS INFORMA (5)!18 PAGE 317 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (3)Beneficial Ownership (3)PARKER PARSLEY 83B LTD (1)INDEX TO EXHIBITS (3)SELECTED FINANCIAL DATA (6) SUPPLEMENTAL INFORMATION T (7)PARKER PARSLEY 84A LTD ITEM 6 SELECTED FINANCIAL (4)INDEX TO FINANCIAL STATEM (4)Balance Sheet (7)Income Statement (9) STATEMENTS OF PARTNERS CAP (7)Cash Flows (8)!15 PAGE 344 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (14)! NOTE 5 OIL AND GAS PRODUC (15)! 16 PAGE 345 NOTE 6 RELATED PAR! 16 PAGE 345 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (6) NOTE 7 OIL AND GAS INFORMA (7) NOTE 7 OIL AND GAS INFORMA (8)!18 PAGE 347 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (4)Beneficial Ownership (4)PARKER PARSLEY 84A LTD (1)INDEX TO EXHIBITS (4)SELECTED FINANCIAL DATA (7) SUPPLEMENTAL INFORMATION T (8)PARKER PARSLEY 85A LTD ITEM 6 SELECTED FINANCIAL (5)INDEX TO FINANCIAL STATEM (5)Balance Sheet (8)Income Statement (10) STATEMENTS OF PARTNERS CAP (8)Cash Flows (9)NOTE 4 INCOME TAXES (6)! NOTE 5 OIL AND GAS PRODUC (16)! NOTE 5 OIL AND GAS PRODUC (17)! 16 PAGE 375 NOTE 6 RELATED PAR! 16 PAGE 375 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (9) NOTE 7 OIL AND GAS INFORM (10) NOTE 7 OIL AND GAS INFORM (11)!18 PAGE 377 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (5)Beneficial Ownership (5)PARKER PARSLEY 85A LTD (1)INDEX TO EXHIBITS (5)SELECTED FINANCIAL DATA (8) SUPPLEMENTAL INFORMATION T (9)PARKER PARSLEY 85B LTD ITEM 6 SELECTED FINANCIAL (6)!7 PAGE 396 ITEM 8 FINANCIAL STABalance Sheet (9) STATEMENTS OF PARTNERS CAP (9)Cash Flows (10)!15 PAGE 404 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (18)! NOTE 5 OIL AND GAS PRODUC (19)! 16 PAGE 405 NOTE 6 RELATED PAR! 16 PAGE 405 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (12) NOTE 7 OIL AND GAS INFORM (13) NOTE 7 OIL AND GAS INFORM (14)!18 PAGE 407 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (6)Beneficial Ownership (6)PARKER PARSLEY 85B LTD (1)INDEX TO EXHIBITS (6)SELECTED FINANCIAL DATA (9) SUPPLEMENTAL INFORMATION (10)Balance Sheet (10)Income Statement (11) STATEMENTS OF PARTNERS CA (10)Cash Flows (11)NOTE 4 INCOME TAXES (7)! NOTE 5 OIL AND GAS PRODUC (20)! NOTE 5 OIL AND GAS PRODUC (21)! 9 PAGE 428 NOTE 6 RELATED PART! 9 PAGE 428 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (15) NOTE 7 OIL AND GAS INFORM (16) NOTE 7 OIL AND GAS INFORM (17)! 11 PAGE 430 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (10) SUPPLEMENTAL INFORMATION (11)Balance Sheet (11)Income Statement (12) STATEMENTS OF PARTNERS CA (11)Cash Flows (12) 8 PAGE 446 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (22)! NOTE 5 OIL AND GAS PRODUC (23)! 9 PAGE 447 NOTE 6 RELATED PART! 9 PAGE 447 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (18) NOTE 7 OIL AND GAS INFORM (19) NOTE 7 OIL AND GAS INFORM (20)! 11 PAGE 449 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (11) SUPPLEMENTAL INFORMATION (12)PARKER PARSLEY 86A LTD ITEM 6 SELECTED FINANCIAL (7)INDEX TO FINANCIAL STATEM (6)Balance Sheet (12)Income Statement (13) STATEMENTS OF PARTNERS CA (12)Cash Flows (13)NOTE 4 INCOME TAXES (8)! NOTE 5 OIL AND GAS PRODUC (24)! NOTE 5 OIL AND GAS PRODUC (25)! 16 PAGE 473 NOTE 6 RELATED PAR! 16 PAGE 473 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (21) NOTE 7 OIL AND GAS INFORM (22) NOTE 7 OIL AND GAS INFORM (23)!18 PAGE 475 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (7)Beneficial Ownership (7)PARKER PARSLEY 86A LTD (1)INDEX TO EXHIBITS (7)SELECTED FINANCIAL DATA (12) SUPPLEMENTAL INFORMATION (13)PARKER PARSLEY 86B LTD ITEM 6 SELECTED FINANCIAL (8)INDEX TO FINANCIAL STATEM (7)Balance Sheet (13)Income Statement (14) STATEMENTS OF PARTNERS CA (13)Cash Flows (14)!16 PAGE 503 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (26)! NOTE 5 OIL AND GAS PRODUC (27)! NOTE 6 RELATED PARTY TRANS (4)! NOTE 6 RELATED PARTY TRANS (5) NOTE 7 OIL AND GAS INFORM (24) NOTE 7 OIL AND GAS INFORM (25) NOTE 7 OIL AND GAS INFORM (26)!19 PAGE 506 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (8)Beneficial Ownership (8)PARKER PARSLEY 86B LTD (1)INDEX TO EXHIBITS (8)SELECTED FINANCIAL DATA (13) SUPPLEMENTAL INFORMATION (14) ITEM 6 SELECTED FINANCIAL (9)!7 PAGE 525 ITEM 8 FINANCIAL STABalance Sheet (14)Income Statement (15) STATEMENTS OF PARTNERS CA (14)Cash Flows (15)NOTE 4 INCOME TAXES (9)! NOTE 5 OIL AND GAS PRODUC (28)! NOTE 5 OIL AND GAS PRODUC (29)! 16 PAGE 534 NOTE 6 RELATED PAR! 16 PAGE 534 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (27) NOTE 7 OIL AND GAS INFORM (28) NOTE 7 OIL AND GAS INFORM (29)!18 PAGE 536 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (9)Beneficial Ownership (9)PARKER PARSLEY 86C LTDSELECTED FINANCIAL DATA (14) SUPPLEMENTAL INFORMATION (15)Balance Sheet (15)Income Statement (16) STATEMENTS OF PARTNERS CA (15)Cash Flows (16) 8 PAGE 556 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (30)! NOTE 5 OIL AND GAS PRODUC (31)! NOTE 6 RELATED PARTY TRANS (6)! NOTE 6 RELATED PARTY TRANS (7) NOTE 7 OIL AND GAS INFORM (30) NOTE 7 OIL AND GAS INFORM (31) NOTE 7 OIL AND GAS INFORM (32)! 11 PAGE 559 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (15) SUPPLEMENTAL INFORMATION (16)Balance Sheet (16)Income Statement (17) STATEMENTS OF PARTNERS CA (16)Cash Flows (17)NOTE 4 INCOME TAXES (10)! NOTE 5 OIL AND GAS PRODUC (32)! NOTE 5 OIL AND GAS PRODUC (33)! 9 PAGE 576 NOTE 6 RELATED PART! 9 PAGE 576 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (33) NOTE 7 OIL AND GAS INFORM (34) NOTE 7 OIL AND GAS INFORM (35)!11 PAGE 578 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (16) SUPPLEMENTAL INFORMATION (17) ITEM 6 SELECTED FINANCIAL (10)!8 PAGE 594 ITEM 8 FINANCIAL STABalance Sheet (17)Income Statement (18) STATEMENTS OF PARTNERS CA (17)Cash Flows (18)NOTE 4 INCOME TAXES (11)! NOTE 5 OIL AND GAS PRODUC (34)! NOTE 5 OIL AND GAS PRODUC (35)! 17 PAGE 603 NOTE 6 RELATED PAR! 17 PAGE 603 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (36) NOTE 7 OIL AND GAS INFORM (37) NOTE 7 OIL AND GAS INFORM (38)! 19 PAGE 605 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (10)Beneficial Ownership (10)PARKER PARSLEY 87A LTDSELECTED FINANCIAL DATA (17) SUPPLEMENTAL INFORMATION (18)Balance Sheet (18)Income Statement (19) STATEMENTS OF PARTNERS CA (18)Cash Flows (19) 8 PAGE 625 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (36)! NOTE 5 OIL AND GAS PRODUC (37)! 9 PAGE 626 NOTE 6 RELATED PART! 9 PAGE 626 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (39) NOTE 7 OIL AND GAS INFORM (40) NOTE 7 OIL AND GAS INFORM (41)! 11 PAGE 628 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (18) SUPPLEMENTAL INFORMATION (19) ITEM 6 SELECTED FINANCIAL (11)INDEX TO FINANCIAL STATEM (8)Balance Sheet (19)Income Statement (20) STATEMENTS OF PARTNERS CA (19)Cash Flows (20)NOTE 4 INCOME TAXES (12)! NOTE 5 OIL AND GAS PRODUC (38)! NOTE 5 OIL AND GAS PRODUC (39)! 17 PAGE 653 NOTE 6 RELATED PAR! 17 PAGE 653 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (42) NOTE 7 OIL AND GAS INFORM (43) NOTE 7 OIL AND GAS INFORM (44)! 19 PAGE 655 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (11)Beneficial Ownership (11)PARKER PARSLEY 87B LTDINDEX TO EXHIBITS (9)SELECTED FINANCIAL DATA (19) SUPPLEMENTAL INFORMATION (20) ITEM 6 SELECTED FINANCIAL (12)INDEX TO FINANCIAL STATEM (9)Balance Sheet (20)Income Statement (21) STATEMENTS OF PARTNERS CA (20)Cash Flows (21)!16 PAGE 683 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (40)! NOTE 5 OIL AND GAS PRODUC (41)! NOTE 6 RELATED PARTY TRANS (8)! NOTE 6 RELATED PARTY TRANS (9) NOTE 7 OIL AND GAS INFORM (45) NOTE 7 OIL AND GAS INFORM (46) NOTE 7 OIL AND GAS INFORM (47)!19 PAGE 686 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (12)Beneficial Ownership (12)PROPERTIES 87A LTDINDEX TO EXHIBITS (10)SELECTED FINANCIAL DATA (20) SUPPLEMENTAL INFORMATION (21) ITEM 6 SELECTED FINANCIAL (13)INDEX TO FINANCIAL STATE (10)Balance Sheet (21)Income Statement (22) STATEMENTS OF PARTNERS CA (21)Cash Flows (22)!16 PAGE 714 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (42)! NOTE 5 OIL AND GAS PRODUC (43)! 17 PAGE 715 NOTE 6 RELATED PAR! 17 PAGE 715 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (48) NOTE 7 OIL AND GAS INFORM (49) NOTE 7 OIL AND GAS INFORM (50)! 19 PAGE 717 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (13)Beneficial Ownership (13)PROPERTIES 87B LTDINDEX TO EXHIBITS (11)SELECTED FINANCIAL DATA (21) SUPPLEMENTAL INFORMATION (22)Balance Sheet (22)Income Statement (23) STATEMENTS OF PARTNERS CA (22)Cash Flows (23) 8 PAGE 737 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (44)! NOTE 5 OIL AND GAS PRODUC (45)! 9 PAGE 738 NOTE 6 RELATED PART! 9 PAGE 738 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (51) NOTE 7 OIL AND GAS INFORM (52) NOTE 7 OIL AND GAS INFORM (53)! 11 PAGE 740 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (22) SUPPLEMENTAL INFORMATION (23)Balance Sheet (23)Income Statement (24) STATEMENTS OF PARTNERS CA (23)Cash Flows (24) 8 PAGE 756 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (46)! NOTE 5 OIL AND GAS PRODUC (47)! 9 PAGE 757 NOTE 6 RELATED PART! 9 PAGE 757 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (54) NOTE 7 OIL AND GAS INFORM (55) NOTE 7 OIL AND GAS INFORM (56)! 11 PAGE 759 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (23)!31 2000 1 PAGE 766 PARKER PARSLPARKER PARSLEY 88A LP ITEM 6 SELECTED FINANCIAL (14)INDEX TO FINANCIAL STATE (11)Balance Sheet (24)Income Statement (25) STATEMENTS OF PARTNERS CA (24)Cash Flows (25)NOTE 4 INCOME TAXES (13)! NOTE 5 OIL AND GAS PRODUC (48)! NOTE 5 OIL AND GAS PRODUC (49)! 16 PAGE 783 NOTE 6 RELATED PAR! 16 PAGE 783 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (57) NOTE 7 OIL AND GAS INFORM (58) NOTE 7 OIL AND GAS INFORM (59)! 18 PAGE 785 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (14)Beneficial Ownership (14)PARKER PARSLEY 88A LP (1)INDEX TO EXHIBITS (12)SELECTED FINANCIAL DATA (24) SUPPLEMENTAL INFORMATION (24)Balance Sheet (25)Income Statement (26) STATEMENTS OF PARTNERS CA (25)Cash Flows (26) 8 PAGE 805 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (50)! NOTE 5 OIL AND GAS PRODUC (51)! 9 PAGE 806 NOTE 6 RELATED PART! 9 PAGE 806 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (60) NOTE 7 OIL AND GAS INFORM (61) NOTE 7 OIL AND GAS INFORM (62)! 11 PAGE 808 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (25)!31 2000 1 PAGE 815 PARKER PARSLPARKER PARSLEY 88B LP ITEM 6 SELECTED FINANCIAL (15)INDEX TO FINANCIAL STATE (12)Balance Sheet (26)Income Statement (27) STATEMENTS OF PARTNERS CA (26)Cash Flows (27)!16 PAGE 832 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (52)! NOTE 5 OIL AND GAS PRODUC (53)! 17 PAGE 833 NOTE 6 RELATED PAR! 17 PAGE 833 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (63) NOTE 7 OIL AND GAS INFORM (64) NOTE 7 OIL AND GAS INFORM (65)! 19 PAGE 835 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (15)Beneficial Ownership (15)PARKER PARSLEY 88B LP (1)INDEX TO EXHIBITS (13)SELECTED FINANCIAL DATA (26) SUPPLEMENTAL INFORMATION (25)Balance Sheet (27)Income Statement (28) STATEMENTS OF PARTNERS CA (27)Cash Flows (28) 8 PAGE 855 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (54)! NOTE 5 OIL AND GAS PRODUC (55)! 9 PAGE 856 NOTE 6 RELATED PART! 9 PAGE 856 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (66) NOTE 7 OIL AND GAS INFORM (67) NOTE 7 OIL AND GAS INFORM (68)! 11 PAGE 858 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (27)!31 2000 1 PAGE 865 PARKER PARSLBalance Sheet (28)Income Statement (29) STATEMENTS OF PARTNERS CA (28)Cash Flows (29) 8 PAGE 874 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (56)! NOTE 5 OIL AND GAS PRODUC (57)! 9 PAGE 875 NOTE 6 RELATED PART! 9 PAGE 875 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (69) NOTE 7 OIL AND GAS INFORM (70) NOTE 7 OIL AND GAS INFORM (71)! 11 PAGE 877 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (28) SUPPLEMENTAL INFORMATION (26)!PARKER PARSLEY PRODUCING PROPER ITEM 6 SELECTED FINANCIAL (16)INDEX TO FINANCIAL STATE (13)Balance Sheet (29)Income Statement (30) STATEMENTS OF PARTNERS CA (29)Cash Flows (30)NOTE 4 INCOME TAXES (14)! NOTE 5 OIL AND GAS PRODUC (58)! NOTE 5 OIL AND GAS PRODUC (59)! 16 PAGE 901 NOTE 6 RELATED PAR! 16 PAGE 901 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (72) NOTE 7 OIL AND GAS INFORM (73)!18 PAGE 903 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (16)Beneficial Ownership (16)PROPERTIES 88A LPINDEX TO EXHIBITS (14)SELECTED FINANCIAL DATA (29) SUPPLEMENTAL INFORMATION (27)Balance Sheet (30)Income Statement (31) STATEMENTS OF PARTNERS CA (30)Cash Flows (31)NOTE 4 INCOME TAXES (15)! NOTE 5 OIL AND GAS PRODUC (60)! NOTE 5 OIL AND GAS PRODUC (61)! 9 PAGE 924 NOTE 6 RELATED PART! 9 PAGE 924 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (74) NOTE 7 OIL AND GAS INFORM (75) NOTE 7 OIL AND GAS INFORM (76)! 11 PAGE 926 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (30) SUPPLEMENTAL INFORMATION (28)Balance Sheet (31)Income Statement (32) STATEMENTS OF PARTNERS CA (31)Cash Flows (32)NOTE 4 INCOME TAXES (16)! NOTE 5 OIL AND GAS PRODUC (62)! NOTE 5 OIL AND GAS PRODUC (63)! 9 PAGE 943 NOTE 6 RELATED PART! 9 PAGE 943 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (77) NOTE 7 OIL AND GAS INFORM (78) NOTE 7 OIL AND GAS INFORM (79)!11 PAGE 945 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (31)!31 2000 1 PAGE 952 PARKER PARSLPARKER PARSLEY 89A LP ITEM 6 SELECTED FINANCIAL (17)INDEX TO FINANCIAL STATE (14)Balance Sheet (32)Income Statement (33) STATEMENTS OF PARTNERS CA (32)Cash Flows (33)NOTE 4 INCOME TAXES (17)! NOTE 5 OIL AND GAS PRODUC (64)! NOTE 5 OIL AND GAS PRODUC (65)! 16 PAGE 969 NOTE 6 RELATED PAR! 16 PAGE 969 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (80) NOTE 7 OIL AND GAS INFORM (81) NOTE 7 OIL AND GAS INFORM (82) NOTE 7 OIL AND GAS INFORM (83)! 18 PAGE 971 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (17)Beneficial Ownership (17)PARKER PARSLEY 89A LP (1)INDEX TO EXHIBITS (15)SELECTED FINANCIAL DATA (32) SUPPLEMENTAL INFORMATION (29)Balance Sheet (33)Income Statement (34) STATEMENTS OF PARTNERS CA (33)Cash Flows (34) 8 PAGE 991 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (66)! NOTE 5 OIL AND GAS PRODUC (67)! 9 PAGE 992 NOTE 6 RELATED PART! 9 PAGE 992 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (84) NOTE 7 OIL AND GAS INFORM (85) NOTE 7 OIL AND GAS INFORM (86)! 11 PAGE 994 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (33)!31 2000 1 PAGE 1001 PARKER PARSBalance Sheet (34)Income Statement (35) STATEMENTS OF PARTNERS CA (34)Cash Flows (35)!8 PAGE 1010 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (68)! NOTE 5 OIL AND GAS PRODUC (69)! 9 PAGE 1011 NOTE 6 RELATED PAR! 9 PAGE 1011 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (87) NOTE 7 OIL AND GAS INFORM (88) NOTE 7 OIL AND GAS INFORM (89)!11 PAGE 1013 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (34) SUPPLEMENTAL INFORMATION (30)Balance Sheet (35)Income Statement (36) STATEMENTS OF PARTNERS CA (35)Cash Flows (36)!8 PAGE 1029 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (70)! NOTE 5 OIL AND GAS PRODUC (71)! 9 PAGE 1030 NOTE 6 RELATED PAR! 9 PAGE 1030 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (90) NOTE 7 OIL AND GAS INFORM (91) NOTE 7 OIL AND GAS INFORM (92)! 11 PAGE 1032 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (35) SUPPLEMENTAL INFORMATION (31)Balance Sheet (36)Income Statement (37) STATEMENTS OF PARTNERS CA (36)Cash Flows (37)!8 PAGE 1048 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (72)! NOTE 5 OIL AND GAS PRODUC (73)! 9 PAGE 1049 NOTE 6 RELATED PAR! 9 PAGE 1049 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (93) NOTE 7 OIL AND GAS INFORM (94) NOTE 7 OIL AND GAS INFORM (95)! 11 PAGE 1051 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (36)!31 2000 1 PAGE 1058 PARKER PARSPARKER PARSLEY 90A LP ITEM 6 SELECTED FINANCIAL (18)INDEX TO FINANCIAL STATE (15)Balance Sheet (37)Income Statement (38) STATEMENTS OF PARTNERS CA (37)Cash Flows (38)!15 PAGE 1074 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (74)! NOTE 5 OIL AND GAS PRODUC (75)! NOTE 6 RELATED PARTY TRAN (10)! NOTE 6 RELATED PARTY TRAN (11) NOTE 7 OIL AND GAS INFORM (96) NOTE 7 OIL AND GAS INFORM (97)! 18 PAGE 1077 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (18)Beneficial Ownership (18)PARKER PARSLEY 90A LP (1)INDEX TO EXHIBITS (16)SELECTED FINANCIAL DATA (37) SUPPLEMENTAL INFORMATION (32)PARKER PARSLEY 90B CONV LP ITEM 6 SELECTED FINANCIAL (19)INDEX TO FINANCIAL STATE (16)Balance Sheet (38)Income Statement (39) STATEMENTS OF PARTNERS CA (38)Cash Flows (39)!16 PAGE 1105 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (76)! NOTE 5 OIL AND GAS PRODUC (77)! NOTE 6 RELATED PARTY TRAN (12)! NOTE 6 RELATED PARTY TRAN (13) NOTE 7 OIL AND GAS INFORM (98) NOTE 7 OIL AND GAS INFORM (99) NOTE 7 OIL AND GAS INFOR (100)! 19 PAGE 1108 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (19)Beneficial Ownership (19) PARKER PARSLEY 90B CONV LP (1)INDEX TO EXHIBITS (17)SELECTED FINANCIAL DATA (38)!31 2000 1 PAGE 1119 PARKER PARSPARKER PARSLEY 90B LP ITEM 6 SELECTED FINANCIAL (20)INDEX TO FINANCIAL STATE (17)Balance Sheet (39)Income Statement (40) STATEMENTS OF PARTNERS CA (39)Cash Flows (40)!16 PAGE 1136 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (78)! NOTE 5 OIL AND GAS PRODUC (79)! NOTE 6 RELATED PARTY TRAN (14)! NOTE 6 RELATED PARTY TRAN (15) NOTE 7 OIL AND GAS INFOR (101) NOTE 7 OIL AND GAS INFOR (102) NOTE 7 OIL AND GAS INFOR (103)! 19 PAGE 1139 NOTE 8 MAJOR CUS!ITEM 10 DIRECTORS AND EXEC (20)Beneficial Ownership (20)PARKER PARSLEY 90B LP (1)INDEX TO EXHIBITS (18)SELECTED FINANCIAL DATA (39) SUPPLEMENTAL INFORMATION (33)PARKER PARSLEY 90C CONV LP ITEM 6 SELECTED FINANCIAL (21)INDEX TO FINANCIAL STATE (18)Balance Sheet (40)Income Statement (41) STATEMENTS OF PARTNERS CA (40)Cash Flows (41)!15 PAGE 1166 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (80)! NOTE 5 OIL AND GAS PRODUC (81)! NOTE 6 RELATED PARTY TRAN (16)! NOTE 6 RELATED PARTY TRAN (17) NOTE 7 OIL AND GAS INFOR (104) NOTE 7 OIL AND GAS INFOR (105) NOTE 7 OIL AND GAS INFOR (106)! 18 PAGE 1169 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (21)Beneficial Ownership (21) PARKER PARSLEY 90C CONV LP (1)INDEX TO EXHIBITS (19)SELECTED FINANCIAL DATA (40)!31 2000 1 PAGE 1180 PARKER PARSPARKER PARSLEY 90C LP ITEM 6 SELECTED FINANCIAL (22)INDEX TO FINANCIAL STATE (19)Balance Sheet (41)Income Statement (42) STATEMENTS OF PARTNERS CA (41)Cash Flows (42)!15 PAGE 1196 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (82)! NOTE 5 OIL AND GAS PRODUC (83)! NOTE 6 RELATED PARTY TRAN (18)! NOTE 6 RELATED PARTY TRAN (19) NOTE 7 OIL AND GAS INFOR (107) NOTE 7 OIL AND GAS INFOR (108) NOTE 7 OIL AND GAS INFOR (109)! 18 PAGE 1199 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (22)Beneficial Ownership (22)PARKER PARSLEY 90C LP (1)INDEX TO EXHIBITS (20)SELECTED FINANCIAL DATA (41) SUPPLEMENTAL INFORMATION (34)Balance Sheet (42)Income Statement (43) STATEMENTS OF PARTNERS CA (42)Cash Flows (43)!8 PAGE 1219 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (84)! NOTE 5 OIL AND GAS PRODUC (85)! 9 PAGE 1220 NOTE 6 RELATED PAR! 9 PAGE 1220 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (110) NOTE 7 OIL AND GAS INFOR (111) NOTE 7 OIL AND GAS INFOR (112)! 11 PAGE 1222 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (42) SUPPLEMENTAL INFORMATION (35)Balance Sheet (43)Income Statement (44) STATEMENTS OF PARTNERS CA (43)Cash Flows (44)!8 PAGE 1238 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (86)! NOTE 5 OIL AND GAS PRODUC (87)! 9 PAGE 1239 NOTE 6 RELATED PAR! 9 PAGE 1239 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (113) NOTE 7 OIL AND GAS INFOR (114) NOTE 7 OIL AND GAS INFOR (115)! 11 PAGE 1241 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (43)!31 2000 1 PAGE 1248 PARKER PARSPARKER PARSLEY 91A LP ITEM 6 SELECTED FINANCIAL (23)INDEX TO FINANCIAL STATE (20)Balance Sheet (44)Income Statement (45) STATEMENTS OF PARTNERS CA (44)Cash Flows (45)!15 PAGE 1264 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (88)! NOTE 5 OIL AND GAS PRODUC (89)! NOTE 6 RELATED PARTY TRAN (20)! NOTE 6 RELATED PARTY TRAN (21) NOTE 7 OIL AND GAS INFOR (116) NOTE 7 OIL AND GAS INFOR (117) NOTE 7 OIL AND GAS INFOR (118)! 18 PAGE 1267 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (23)Beneficial Ownership (23)PARKER PARSLEY 91A LP (1)INDEX TO EXHIBITS (21)SELECTED FINANCIAL DATA (44)!31 2000 1 PAGE 1278 PARKER PARSPARKER PARSLEY 91B LP ITEM 6 SELECTED FINANCIAL (24)INDEX TO FINANCIAL STATE (21)Balance Sheet (45)Income Statement (46) STATEMENTS OF PARTNERS CA (45)Cash Flows (46)!15 PAGE 1294 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (90)! NOTE 5 OIL AND GAS PRODUC (91)! NOTE 6 RELATED PARTY TRAN (22)! NOTE 6 RELATED PARTY TRAN (23) NOTE 7 OIL AND GAS INFOR (119) NOTE 7 OIL AND GAS INFOR (120) NOTE 7 OIL AND GAS INFOR (121)! 18 PAGE 1297 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (24)Beneficial Ownership (24)PARKER PARSLEY 91B LP (1)INDEX TO EXHIBITS (22)SELECTED FINANCIAL DATA (45)POWER OF ATTORNEYPOWER OF ATTORNEY (1)POWER OF ATTORNEY (2)POWER OF ATTORNEY (3)POWER OF ATTORNEY (4)POWER OF ATTORNEY (5)POWER OF ATTORNEY (6)POWER OF ATTORNEY (7)!2001 THE BOARD OF DIRECTORS REC!2001 THE BOARD OF DIRECTORS (1)!2001 THE BOARD OF DIRECTORS (2)PAGE 2U } } S} y J    $PIONEER NATURAL RESOURCES CO S-4 04/17/2001<> LIST OF APPENDICES   Appendix   General Informa0(Information Relating to Each Partnership A Table 1IAJurisdiction of Organization, Initial Subscription Price for EachB:Unit, Initial Investment by Limited Partners and Number of-%Limited Partners as of March 31, 2001 Table 23+Aggregate Merger Value as of March 31, 2001 Table 3E=Merger Value Attributable to Partnership Interests of Limited:2Partners Per 1,000 Investment as of March 31, 2001 Table 4IAOwnership Percentage and Merger Value Attributable to NonmanagingD<General Partners Other Than Pioneer USA as of March 31, 2001 Table 5IAOwnership Percentage and Merger Value Attributable to Pioneer USAIAin Its Capacities as General Partner, Nonmanaging General Partner0(and Limited Partner as of March 31, 2001 Table 6H@Voting Percentage and Initial Investment Owned by Pioneer USA inDlV2vZ[OCH !"#$%&'()*+,-./0123456789:;<=>? > 6Its Capacity as a Limited Partner as of March 31, 2001!" Table 7E"=Historical Quarterly Partnership Distributions to the Limited#F#>Partners Per 1,000 Investment from Inception through March 31,$ $2001%& Table 8I&AAnnual Repurchase Prices and Aggregate Annual Repurchase Payments'( Table 9?(7Participation in Costs and Revenues of Each Partnership)* Table 10A*9Average Oil, Natural Gas Liquids and Gas Sales Prices and+F+>Production Costs for the Three Months Ended March 31, 2022 and,A,92000 and the Years Ended December 31, 2000, 1999 and 1998-. Table 11H.@Proved Reserves Attributable to Pioneer USA, Nonmanaging General/=/5Partners and Limited Partners as of December 31, 200001 Table 12H1@Proved Reserves Attributable to Pioneer USA, Nonmanaging General2:22Partners and Limited Partners as of March 31, 200134 Table 13H4@Oil, Natural Gas Liquids and Gas Production for the Three Months5F5>Ended March 31, 2022 and 2000 and the Years Ended December 31,662000, 1999 and 199878 Table 14F8>Productive Wells and Developed Acreage as of December 31, 20009: Table 15G:?Recent Trades of Partnership Interests Per 1,000 Investment for;A;9the Three Months Ended March 31, 2022 and the Years Ended<"<December 31, 2000 and 1999=>Summary ReserveM>EReport of Williamson Petroleum Consultants, Inc. for the Partnerships >B?D lHh\G;/w(j8,@ABCDEFGHI@Form of Fairnes8@0Fairness Opinion of Robert A. Stanger & Co., Inc @CABThe Merger PropB Proposals BDCDForm of Agreeme$DAgreement and Plan of Merger DEEF$G____________________________1H)Created by Morningstar Document Research.0I(http://documentresearch.morningstar.com/zSG=PF0*8X> @IIHHGG l   *M>[hxGz dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/?? SECURITIES AND EXC!CALCULATION OF REGISTRATION FEETO BE HELD ON 2001TABLE OF CONTENTSPAGE 7 LIST OF APPENDICES!LIMITED PARTNER INVESTMENT (1) 5 PAGE 15 NYMEX FUTURES PRICES!EXAMPLE CALCULATION OF MERGER VIncome StatementIncome Statement (1)AT DECEMBER 31 2000!15 PAGE 25 COMPARATIVE PER SHAR!25 PAGE 35 REASONS FOR THE MERGFAIRNESS OPINIONFAIRNESS OPINION (1)!LEGAL OPINION FOR LIMITED PARTN!LEGAL OPINION FOR LIMITED P (1)!NONMANAGING GENERAL PARTNERS OF!49 PAGE 59 PAYMENT OF EXPENSES !58 PAGE 68 COMPARATIVE PER SHAR!60 PAGE 70 OWNERSHIP OF PARTNER PIONEER PIONEER USATHE DRILLING PARTNERSHIPSTHE DRILLING PARTNERSHIPS (1)THE INCOME PARTNERSHIPS INTERESTSINTERESTS (1)INTERESTS (2)INTERESTS (3)INTERESTS (4)INTERESTS (5)!WHERE YOU CAN FIND MORE INFORMAAS OF DECEMBER 31 2000YEAR ENDED DECEMBER 31 2000!QUANTITIES OF OIL AND GAS RESER!STANDARDIZED MEASURE OF DISCOUN CASH FLOWSAS OF MARCH 31 2001AS OF MARCH 31 2001 (1)AS OF MARCH 31 2001 (2)AS OF MARCH 31 2001 (3)AS OF MARCH 31 2001 (4)AS OF MARCH 31 2001 (5)!FROM INCEPTION THROUGH MARCH 31!ANNUAL REPURCHASE PRICES AND AGOF EACH PARTNERSHIP!FOR THE THREE MONTHS ENDED MARCAS OF DECEMBER 31 2000 (1)AS OF MARCH 31 2001 (6)!THE YEARS ENDED DECEMBER 31 200AS OF DECEMBER 31 2000 (2)DECEMBER 31 2000 AND 1999EFFECTIVE DECEMBER 31 2000 EFFECTIVE DECEMBER 31 2000 (1) RECITALS RECITALS (1) SUPPLEMENTAL INFORMATION TABLEBalance SheetIncome Statement (2) STATEMENTS OF PARTNERS CAPITALCash Flows (1)NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCING A! NOTE 5 OIL AND GAS PRODUCI (1)! NOTE 6 RELATED PARTY TRANSACTI! NOTE 6 RELATED PARTY TRANS (1)! NOTE 7 OIL AND GAS INFORMATION! NOTE 7 OIL AND GAS INFORMA (1)! NOTE 7 OIL AND GAS INFORMA (2)!11 PAGE 163 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA SUPPLEMENTAL INFORMATION T (1)Balance Sheet (1)Income Statement (3) STATEMENTS OF PARTNERS CAP (1)Cash Flows (2)NOTE 4 INCOME TAXES (1)! NOTE 5 OIL AND GAS PRODUCI (2)! NOTE 5 OIL AND GAS PRODUCI (3)! 9 PAGE 180 NOTE 6 RELATED PAR! 9 PAGE 180 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORMA (3)! NOTE 7 OIL AND GAS INFORMA (4)! NOTE 7 OIL AND GAS INFORMA (5)!11 PAGE 182 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (1) SUPPLEMENTAL INFORMATION T (2) ITEM 6 SELECTED FINANCIAL DATAINDEX TO FINANCIAL STATEMENTSBalance Sheet (2)Income Statement (4) STATEMENTS OF PARTNERS CAP (2)Cash Flows (3)!15 PAGE 205 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCI (4)! NOTE 5 OIL AND GAS PRODUCI (5)! NOTE 6 RELATED PARTY TRANS (2)! NOTE 6 RELATED PARTY TRANS (3)! NOTE 7 OIL AND GAS INFORMA (6)! NOTE 7 OIL AND GAS INFORMA (7)! NOTE 7 OIL AND GAS INFORMA (8)! NOTE 7 OIL AND GAS INFORMA (9)! NOTE 7 OIL AND GAS INFORM (10)! 18 PAGE 208 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECUTIVEBeneficial OwnershipPARKER PARSLEY 82I LTDINDEX TO EXHIBITSSELECTED FINANCIAL DATA (2) SUPPLEMENTAL INFORMATION T (3) ITEM 6 SELECTED FINANCIAL (1)INDEX TO FINANCIAL STATEM (1)Balance Sheet (3)Income Statement (5) STATEMENTS OF PARTNERS CAP (3)Cash Flows (4)NOTE 4 INCOME TAXES (2)! NOTE 5 OIL AND GAS PRODUCI (6)! NOTE 5 OIL AND GAS PRODUCI (7)! 16 PAGE 236 NOTE 6 RELATED PAR! 16 PAGE 236 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (11)! NOTE 7 OIL AND GAS INFORM (12)! NOTE 7 OIL AND GAS INFORM (13)!18 PAGE 238 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (1)Beneficial Ownership (1)PARKER PARSLEY 82II LTDINDEX TO EXHIBITS (1)SELECTED FINANCIAL DATA (3) SUPPLEMENTAL INFORMATION T (4)Balance Sheet (4)Income Statement (6) STATEMENTS OF PARTNERS CAP (4)Cash Flows (5)NOTE 4 INCOME TAXES (3)! NOTE 5 OIL AND GAS PRODUCI (8)! NOTE 5 OIL AND GAS PRODUCI (9)! 9 PAGE 259 NOTE 6 RELATED PART! 9 PAGE 259 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (14)! NOTE 7 OIL AND GAS INFORM (15)! NOTE 7 OIL AND GAS INFORM (16)!11 PAGE 261 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (4) SUPPLEMENTAL INFORMATION T (5)PARKER PARSLEY 83A LTD ITEM 6 SELECTED FINANCIAL (2)INDEX TO FINANCIAL STATEM (2)Balance Sheet (5)Income Statement (7) STATEMENTS OF PARTNERS CAP (5)Cash Flows (6)NOTE 4 INCOME TAXES (4)! NOTE 5 OIL AND GAS PRODUC (10)! NOTE 5 OIL AND GAS PRODUC (11)! 16 PAGE 285 NOTE 6 RELATED PAR! 16 PAGE 285 NOTE 6 RELATED (1)!NOTE 7 OIL AND GAS INFORMATION  NOTE 7 OIL AND GAS INFORMA (1) NOTE 7 OIL AND GAS INFORMA (2)! 18 PAGE 287 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECU (2)Beneficial Ownership (2)PARKER PARSLEY 83A LTD (1)INDEX TO EXHIBITS (2)SELECTED FINANCIAL DATA (5) SUPPLEMENTAL INFORMATION T (6)PARKER PARSLEY 83B LTD ITEM 6 SELECTED FINANCIAL (3)INDEX TO FINANCIAL STATEM (3)Balance Sheet (6)Income Statement (8) STATEMENTS OF PARTNERS CAP (6)Cash Flows (7)NOTE 4 INCOME TAXES (5)! NOTE 5 OIL AND GAS PRODUC (12)! NOTE 5 OIL AND GAS PRODUC (13)! 16 PAGE 315 NOTE 6 RELATED PAR! 16 PAGE 315 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (3) NOTE 7 OIL AND GAS INFORMA (4) NOTE 7 OIL AND GAS INFORMA (5)!18 PAGE 317 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (3)Beneficial Ownership (3)PARKER PARSLEY 83B LTD (1)INDEX TO EXHIBITS (3)SELECTED FINANCIAL DATA (6) SUPPLEMENTAL INFORMATION T (7)PARKER PARSLEY 84A LTD ITEM 6 SELECTED FINANCIAL (4)INDEX TO FINANCIAL STATEM (4)Balance Sheet (7)Income Statement (9) STATEMENTS OF PARTNERS CAP (7)Cash Flows (8)!15 PAGE 344 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (14)! NOTE 5 OIL AND GAS PRODUC (15)! 16 PAGE 345 NOTE 6 RELATED PAR! 16 PAGE 345 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (6) NOTE 7 OIL AND GAS INFORMA (7) NOTE 7 OIL AND GAS INFORMA (8)!18 PAGE 347 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (4)Beneficial Ownership (4)PARKER PARSLEY 84A LTD (1)INDEX TO EXHIBITS (4)SELECTED FINANCIAL DATA (7) SUPPLEMENTAL INFORMATION T (8)PARKER PARSLEY 85A LTD ITEM 6 SELECTED FINANCIAL (5)INDEX TO FINANCIAL STATEM (5)Balance Sheet (8)Income Statement (10) STATEMENTS OF PARTNERS CAP (8)Cash Flows (9)NOTE 4 INCOME TAXES (6)! NOTE 5 OIL AND GAS PRODUC (16)! NOTE 5 OIL AND GAS PRODUC (17)! 16 PAGE 375 NOTE 6 RELATED PAR! 16 PAGE 375 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (9) NOTE 7 OIL AND GAS INFORM (10) NOTE 7 OIL AND GAS INFORM (11)!18 PAGE 377 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (5)Beneficial Ownership (5)PARKER PARSLEY 85A LTD (1)INDEX TO EXHIBITS (5)SELECTED FINANCIAL DATA (8) SUPPLEMENTAL INFORMATION T (9)PARKER PARSLEY 85B LTD ITEM 6 SELECTED FINANCIAL (6)!7 PAGE 396 ITEM 8 FINANCIAL STABalance Sheet (9) STATEMENTS OF PARTNERS CAP (9)Cash Flows (10)!15 PAGE 404 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (18)! NOTE 5 OIL AND GAS PRODUC (19)! 16 PAGE 405 NOTE 6 RELATED PAR! 16 PAGE 405 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (12) NOTE 7 OIL AND GAS INFORM (13) NOTE 7 OIL AND GAS INFORM (14)!18 PAGE 407 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (6)Beneficial Ownership (6)PARKER PARSLEY 85B LTD (1)INDEX TO EXHIBITS (6)SELECTED FINANCIAL DATA (9) SUPPLEMENTAL INFORMATION (10)Balance Sheet (10)Income Statement (11) STATEMENTS OF PARTNERS CA (10)Cash Flows (11)NOTE 4 INCOME TAXES (7)! NOTE 5 OIL AND GAS PRODUC (20)! NOTE 5 OIL AND GAS PRODUC (21)! 9 PAGE 428 NOTE 6 RELATED PART! 9 PAGE 428 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (15) NOTE 7 OIL AND GAS INFORM (16) NOTE 7 OIL AND GAS INFORM (17)! 11 PAGE 430 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (10) SUPPLEMENTAL INFORMATION (11)Balance Sheet (11)Income Statement (12) STATEMENTS OF PARTNERS CA (11)Cash Flows (12) 8 PAGE 446 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (22)! NOTE 5 OIL AND GAS PRODUC (23)! 9 PAGE 447 NOTE 6 RELATED PART! 9 PAGE 447 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (18) NOTE 7 OIL AND GAS INFORM (19) NOTE 7 OIL AND GAS INFORM (20)! 11 PAGE 449 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (11) SUPPLEMENTAL INFORMATION (12)PARKER PARSLEY 86A LTD ITEM 6 SELECTED FINANCIAL (7)INDEX TO FINANCIAL STATEM (6)Balance Sheet (12)Income Statement (13) STATEMENTS OF PARTNERS CA (12)Cash Flows (13)NOTE 4 INCOME TAXES (8)! NOTE 5 OIL AND GAS PRODUC (24)! NOTE 5 OIL AND GAS PRODUC (25)! 16 PAGE 473 NOTE 6 RELATED PAR! 16 PAGE 473 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (21) NOTE 7 OIL AND GAS INFORM (22) NOTE 7 OIL AND GAS INFORM (23)!18 PAGE 475 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (7)Beneficial Ownership (7)PARKER PARSLEY 86A LTD (1)INDEX TO EXHIBITS (7)SELECTED FINANCIAL DATA (12) SUPPLEMENTAL INFORMATION (13)PARKER PARSLEY 86B LTD ITEM 6 SELECTED FINANCIAL (8)INDEX TO FINANCIAL STATEM (7)Balance Sheet (13)Income Statement (14) STATEMENTS OF PARTNERS CA (13)Cash Flows (14)!16 PAGE 503 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (26)! NOTE 5 OIL AND GAS PRODUC (27)! NOTE 6 RELATED PARTY TRANS (4)! NOTE 6 RELATED PARTY TRANS (5) NOTE 7 OIL AND GAS INFORM (24) NOTE 7 OIL AND GAS INFORM (25) NOTE 7 OIL AND GAS INFORM (26)!19 PAGE 506 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (8)Beneficial Ownership (8)PARKER PARSLEY 86B LTD (1)INDEX TO EXHIBITS (8)SELECTED FINANCIAL DATA (13) SUPPLEMENTAL INFORMATION (14) ITEM 6 SELECTED FINANCIAL (9)!7 PAGE 525 ITEM 8 FINANCIAL STABalance Sheet (14)Income Statement (15) STATEMENTS OF PARTNERS CA (14)Cash Flows (15)NOTE 4 INCOME TAXES (9)! NOTE 5 OIL AND GAS PRODUC (28)! NOTE 5 OIL AND GAS PRODUC (29)! 16 PAGE 534 NOTE 6 RELATED PAR! 16 PAGE 534 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (27) NOTE 7 OIL AND GAS INFORM (28) NOTE 7 OIL AND GAS INFORM (29)!18 PAGE 536 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (9)Beneficial Ownership (9)PARKER PARSLEY 86C LTDSELECTED FINANCIAL DATA (14) SUPPLEMENTAL INFORMATION (15)Balance Sheet (15)Income Statement (16) STATEMENTS OF PARTNERS CA (15)Cash Flows (16) 8 PAGE 556 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (30)! NOTE 5 OIL AND GAS PRODUC (31)! NOTE 6 RELATED PARTY TRANS (6)! NOTE 6 RELATED PARTY TRANS (7) NOTE 7 OIL AND GAS INFORM (30) NOTE 7 OIL AND GAS INFORM (31) NOTE 7 OIL AND GAS INFORM (32)! 11 PAGE 559 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (15) SUPPLEMENTAL INFORMATION (16)Balance Sheet (16)Income Statement (17) STATEMENTS OF PARTNERS CA (16)Cash Flows (17)NOTE 4 INCOME TAXES (10)! NOTE 5 OIL AND GAS PRODUC (32)! NOTE 5 OIL AND GAS PRODUC (33)! 9 PAGE 576 NOTE 6 RELATED PART! 9 PAGE 576 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (33) NOTE 7 OIL AND GAS INFORM (34) NOTE 7 OIL AND GAS INFORM (35)!11 PAGE 578 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (16) SUPPLEMENTAL INFORMATION (17) ITEM 6 SELECTED FINANCIAL (10)!8 PAGE 594 ITEM 8 FINANCIAL STABalance Sheet (17)Income Statement (18) STATEMENTS OF PARTNERS CA (17)Cash Flows (18)NOTE 4 INCOME TAXES (11)! NOTE 5 OIL AND GAS PRODUC (34)! NOTE 5 OIL AND GAS PRODUC (35)! 17 PAGE 603 NOTE 6 RELATED PAR! 17 PAGE 603 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (36) NOTE 7 OIL AND GAS INFORM (37) NOTE 7 OIL AND GAS INFORM (38)! 19 PAGE 605 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (10)Beneficial Ownership (10)PARKER PARSLEY 87A LTDSELECTED FINANCIAL DATA (17) SUPPLEMENTAL INFORMATION (18)Balance Sheet (18)Income Statement (19) STATEMENTS OF PARTNERS CA (18)Cash Flows (19) 8 PAGE 625 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (36)! NOTE 5 OIL AND GAS PRODUC (37)! 9 PAGE 626 NOTE 6 RELATED PART! 9 PAGE 626 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (39) NOTE 7 OIL AND GAS INFORM (40) NOTE 7 OIL AND GAS INFORM (41)! 11 PAGE 628 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (18) SUPPLEMENTAL INFORMATION (19) ITEM 6 SELECTED FINANCIAL (11)INDEX TO FINANCIAL STATEM (8)Balance Sheet (19)Income Statement (20) STATEMENTS OF PARTNERS CA (19)Cash Flows (20)NOTE 4 INCOME TAXES (12)! NOTE 5 OIL AND GAS PRODUC (38)! NOTE 5 OIL AND GAS PRODUC (39)! 17 PAGE 653 NOTE 6 RELATED PAR! 17 PAGE 653 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (42) NOTE 7 OIL AND GAS INFORM (43) NOTE 7 OIL AND GAS INFORM (44)! 19 PAGE 655 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (11)Beneficial Ownership (11)PARKER PARSLEY 87B LTDINDEX TO EXHIBITS (9)SELECTED FINANCIAL DATA (19) SUPPLEMENTAL INFORMATION (20) ITEM 6 SELECTED FINANCIAL (12)INDEX TO FINANCIAL STATEM (9)Balance Sheet (20)Income Statement (21) STATEMENTS OF PARTNERS CA (20)Cash Flows (21)!16 PAGE 683 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (40)! NOTE 5 OIL AND GAS PRODUC (41)! NOTE 6 RELATED PARTY TRANS (8)! NOTE 6 RELATED PARTY TRANS (9) NOTE 7 OIL AND GAS INFORM (45) NOTE 7 OIL AND GAS INFORM (46) NOTE 7 OIL AND GAS INFORM (47)!19 PAGE 686 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (12)Beneficial Ownership (12)PROPERTIES 87A LTDINDEX TO EXHIBITS (10)SELECTED FINANCIAL DATA (20) SUPPLEMENTAL INFORMATION (21) ITEM 6 SELECTED FINANCIAL (13)INDEX TO FINANCIAL STATE (10)Balance Sheet (21)Income Statement (22) STATEMENTS OF PARTNERS CA (21)Cash Flows (22)!16 PAGE 714 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (42)! NOTE 5 OIL AND GAS PRODUC (43)! 17 PAGE 715 NOTE 6 RELATED PAR! 17 PAGE 715 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (48) NOTE 7 OIL AND GAS INFORM (49) NOTE 7 OIL AND GAS INFORM (50)! 19 PAGE 717 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (13)Beneficial Ownership (13)PROPERTIES 87B LTDINDEX TO EXHIBITS (11)SELECTED FINANCIAL DATA (21) SUPPLEMENTAL INFORMATION (22)Balance Sheet (22)Income Statement (23) STATEMENTS OF PARTNERS CA (22)Cash Flows (23) 8 PAGE 737 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (44)! NOTE 5 OIL AND GAS PRODUC (45)! 9 PAGE 738 NOTE 6 RELATED PART! 9 PAGE 738 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (51) NOTE 7 OIL AND GAS INFORM (52) NOTE 7 OIL AND GAS INFORM (53)! 11 PAGE 740 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (22) SUPPLEMENTAL INFORMATION (23)Balance Sheet (23)Income Statement (24) STATEMENTS OF PARTNERS CA (23)Cash Flows (24) 8 PAGE 756 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (46)! NOTE 5 OIL AND GAS PRODUC (47)! 9 PAGE 757 NOTE 6 RELATED PART! 9 PAGE 757 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (54) NOTE 7 OIL AND GAS INFORM (55) NOTE 7 OIL AND GAS INFORM (56)! 11 PAGE 759 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (23)!31 2000 1 PAGE 766 PARKER PARSLPARKER PARSLEY 88A LP ITEM 6 SELECTED FINANCIAL (14)INDEX TO FINANCIAL STATE (11)Balance Sheet (24)Income Statement (25) STATEMENTS OF PARTNERS CA (24)Cash Flows (25)NOTE 4 INCOME TAXES (13)! NOTE 5 OIL AND GAS PRODUC (48)! NOTE 5 OIL AND GAS PRODUC (49)! 16 PAGE 783 NOTE 6 RELATED PAR! 16 PAGE 783 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (57) NOTE 7 OIL AND GAS INFORM (58) NOTE 7 OIL AND GAS INFORM (59)! 18 PAGE 785 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (14)Beneficial Ownership (14)PARKER PARSLEY 88A LP (1)INDEX TO EXHIBITS (12)SELECTED FINANCIAL DATA (24) SUPPLEMENTAL INFORMATION (24)Balance Sheet (25)Income Statement (26) STATEMENTS OF PARTNERS CA (25)Cash Flows (26) 8 PAGE 805 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (50)! NOTE 5 OIL AND GAS PRODUC (51)! 9 PAGE 806 NOTE 6 RELATED PART! 9 PAGE 806 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (60) NOTE 7 OIL AND GAS INFORM (61) NOTE 7 OIL AND GAS INFORM (62)! 11 PAGE 808 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (25)!31 2000 1 PAGE 815 PARKER PARSLPARKER PARSLEY 88B LP ITEM 6 SELECTED FINANCIAL (15)INDEX TO FINANCIAL STATE (12)Balance Sheet (26)Income Statement (27) STATEMENTS OF PARTNERS CA (26)Cash Flows (27)!16 PAGE 832 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (52)! NOTE 5 OIL AND GAS PRODUC (53)! 17 PAGE 833 NOTE 6 RELATED PAR! 17 PAGE 833 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (63) NOTE 7 OIL AND GAS INFORM (64) NOTE 7 OIL AND GAS INFORM (65)! 19 PAGE 835 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (15)Beneficial Ownership (15)PARKER PARSLEY 88B LP (1)INDEX TO EXHIBITS (13)SELECTED FINANCIAL DATA (26) SUPPLEMENTAL INFORMATION (25)Balance Sheet (27)Income Statement (28) STATEMENTS OF PARTNERS CA (27)Cash Flows (28) 8 PAGE 855 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (54)! NOTE 5 OIL AND GAS PRODUC (55)! 9 PAGE 856 NOTE 6 RELATED PART! 9 PAGE 856 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (66) NOTE 7 OIL AND GAS INFORM (67) NOTE 7 OIL AND GAS INFORM (68)! 11 PAGE 858 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (27)!31 2000 1 PAGE 865 PARKER PARSLBalance Sheet (28)Income Statement (29) STATEMENTS OF PARTNERS CA (28)Cash Flows (29) 8 PAGE 874 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (56)! NOTE 5 OIL AND GAS PRODUC (57)! 9 PAGE 875 NOTE 6 RELATED PART! 9 PAGE 875 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (69) NOTE 7 OIL AND GAS INFORM (70) NOTE 7 OIL AND GAS INFORM (71)! 11 PAGE 877 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (28) SUPPLEMENTAL INFORMATION (26)!PARKER PARSLEY PRODUCING PROPER ITEM 6 SELECTED FINANCIAL (16)INDEX TO FINANCIAL STATE (13)Balance Sheet (29)Income Statement (30) STATEMENTS OF PARTNERS CA (29)Cash Flows (30)NOTE 4 INCOME TAXES (14)! NOTE 5 OIL AND GAS PRODUC (58)! NOTE 5 OIL AND GAS PRODUC (59)! 16 PAGE 901 NOTE 6 RELATED PAR! 16 PAGE 901 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (72) NOTE 7 OIL AND GAS INFORM (73)!18 PAGE 903 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (16)Beneficial Ownership (16)PROPERTIES 88A LPINDEX TO EXHIBITS (14)SELECTED FINANCIAL DATA (29) SUPPLEMENTAL INFORMATION (27)Balance Sheet (30)Income Statement (31) STATEMENTS OF PARTNERS CA (30)Cash Flows (31)NOTE 4 INCOME TAXES (15)! NOTE 5 OIL AND GAS PRODUC (60)! NOTE 5 OIL AND GAS PRODUC (61)! 9 PAGE 924 NOTE 6 RELATED PART! 9 PAGE 924 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (74) NOTE 7 OIL AND GAS INFORM (75) NOTE 7 OIL AND GAS INFORM (76)! 11 PAGE 926 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (30) SUPPLEMENTAL INFORMATION (28)Balance Sheet (31)Income Statement (32) STATEMENTS OF PARTNERS CA (31)Cash Flows (32)NOTE 4 INCOME TAXES (16)! NOTE 5 OIL AND GAS PRODUC (62)! NOTE 5 OIL AND GAS PRODUC (63)! 9 PAGE 943 NOTE 6 RELATED PART! 9 PAGE 943 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (77) NOTE 7 OIL AND GAS INFORM (78) NOTE 7 OIL AND GAS INFORM (79)!11 PAGE 945 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (31)!31 2000 1 PAGE 952 PARKER PARSLPARKER PARSLEY 89A LP ITEM 6 SELECTED FINANCIAL (17)INDEX TO FINANCIAL STATE (14)Balance Sheet (32)Income Statement (33) STATEMENTS OF PARTNERS CA (32)Cash Flows (33)NOTE 4 INCOME TAXES (17)! NOTE 5 OIL AND GAS PRODUC (64)! NOTE 5 OIL AND GAS PRODUC (65)! 16 PAGE 969 NOTE 6 RELATED PAR! 16 PAGE 969 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (80) NOTE 7 OIL AND GAS INFORM (81) NOTE 7 OIL AND GAS INFORM (82) NOTE 7 OIL AND GAS INFORM (83)! 18 PAGE 971 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (17)Beneficial Ownership (17)PARKER PARSLEY 89A LP (1)INDEX TO EXHIBITS (15)SELECTED FINANCIAL DATA (32) SUPPLEMENTAL INFORMATION (29)Balance Sheet (33)Income Statement (34) STATEMENTS OF PARTNERS CA (33)Cash Flows (34) 8 PAGE 991 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (66)! NOTE 5 OIL AND GAS PRODUC (67)! 9 PAGE 992 NOTE 6 RELATED PART! 9 PAGE 992 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (84) NOTE 7 OIL AND GAS INFORM (85) NOTE 7 OIL AND GAS INFORM (86)! 11 PAGE 994 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (33)!31 2000 1 PAGE 1001 PARKER PARSBalance Sheet (34)Income Statement (35) STATEMENTS OF PARTNERS CA (34)Cash Flows (35)!8 PAGE 1010 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (68)! NOTE 5 OIL AND GAS PRODUC (69)! 9 PAGE 1011 NOTE 6 RELATED PAR! 9 PAGE 1011 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (87) NOTE 7 OIL AND GAS INFORM (88) NOTE 7 OIL AND GAS INFORM (89)!11 PAGE 1013 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (34) SUPPLEMENTAL INFORMATION (30)Balance Sheet (35)Income Statement (36) STATEMENTS OF PARTNERS CA (35)Cash Flows (36)!8 PAGE 1029 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (70)! NOTE 5 OIL AND GAS PRODUC (71)! 9 PAGE 1030 NOTE 6 RELATED PAR! 9 PAGE 1030 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (90) NOTE 7 OIL AND GAS INFORM (91) NOTE 7 OIL AND GAS INFORM (92)! 11 PAGE 1032 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (35) SUPPLEMENTAL INFORMATION (31)Balance Sheet (36)Income Statement (37) STATEMENTS OF PARTNERS CA (36)Cash Flows (37)!8 PAGE 1048 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (72)! NOTE 5 OIL AND GAS PRODUC (73)! 9 PAGE 1049 NOTE 6 RELATED PAR! 9 PAGE 1049 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (93) NOTE 7 OIL AND GAS INFORM (94) NOTE 7 OIL AND GAS INFORM (95)! 11 PAGE 1051 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (36)!31 2000 1 PAGE 1058 PARKER PARSPARKER PARSLEY 90A LP ITEM 6 SELECTED FINANCIAL (18)INDEX TO FINANCIAL STATE (15)Balance Sheet (37)Income Statement (38) STATEMENTS OF PARTNERS CA (37)Cash Flows (38)!15 PAGE 1074 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (74)! NOTE 5 OIL AND GAS PRODUC (75)! NOTE 6 RELATED PARTY TRAN (10)! NOTE 6 RELATED PARTY TRAN (11) NOTE 7 OIL AND GAS INFORM (96) NOTE 7 OIL AND GAS INFORM (97)! 18 PAGE 1077 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (18)Beneficial Ownership (18)PARKER PARSLEY 90A LP (1)INDEX TO EXHIBITS (16)SELECTED FINANCIAL DATA (37) SUPPLEMENTAL INFORMATION (32)PARKER PARSLEY 90B CONV LP ITEM 6 SELECTED FINANCIAL (19)INDEX TO FINANCIAL STATE (16)Balance Sheet (38)Income Statement (39) STATEMENTS OF PARTNERS CA (38)Cash Flows (39)!16 PAGE 1105 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (76)! NOTE 5 OIL AND GAS PRODUC (77)! NOTE 6 RELATED PARTY TRAN (12)! NOTE 6 RELATED PARTY TRAN (13) NOTE 7 OIL AND GAS INFORM (98) NOTE 7 OIL AND GAS INFORM (99) NOTE 7 OIL AND GAS INFOR (100)! 19 PAGE 1108 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (19)Beneficial Ownership (19) PARKER PARSLEY 90B CONV LP (1)INDEX TO EXHIBITS (17)SELECTED FINANCIAL DATA (38)!31 2000 1 PAGE 1119 PARKER PARSPARKER PARSLEY 90B LP ITEM 6 SELECTED FINANCIAL (20)INDEX TO FINANCIAL STATE (17)Balance Sheet (39)Income Statement (40) STATEMENTS OF PARTNERS CA (39)Cash Flows (40)!16 PAGE 1136 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (78)! NOTE 5 OIL AND GAS PRODUC (79)! NOTE 6 RELATED PARTY TRAN (14)! NOTE 6 RELATED PARTY TRAN (15) NOTE 7 OIL AND GAS INFOR (101) NOTE 7 OIL AND GAS INFOR (102) NOTE 7 OIL AND GAS INFOR (103)! 19 PAGE 1139 NOTE 8 MAJOR CUS!ITEM 10 DIRECTORS AND EXEC (20)Beneficial Ownership (20)PARKER PARSLEY 90B LP (1)INDEX TO EXHIBITS (18)SELECTED FINANCIAL DATA (39) SUPPLEMENTAL INFORMATION (33)PARKER PARSLEY 90C CONV LP ITEM 6 SELECTED FINANCIAL (21)INDEX TO FINANCIAL STATE (18)Balance Sheet (40)Income Statement (41) STATEMENTS OF PARTNERS CA (40)Cash Flows (41)!15 PAGE 1166 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (80)! NOTE 5 OIL AND GAS PRODUC (81)! NOTE 6 RELATED PARTY TRAN (16)! NOTE 6 RELATED PARTY TRAN (17) NOTE 7 OIL AND GAS INFOR (104) NOTE 7 OIL AND GAS INFOR (105) NOTE 7 OIL AND GAS INFOR (106)! 18 PAGE 1169 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (21)Beneficial Ownership (21) PARKER PARSLEY 90C CONV LP (1)INDEX TO EXHIBITS (19)SELECTED FINANCIAL DATA (40)!31 2000 1 PAGE 1180 PARKER PARSPARKER PARSLEY 90C LP ITEM 6 SELECTED FINANCIAL (22)INDEX TO FINANCIAL STATE (19)Balance Sheet (41)Income Statement (42) STATEMENTS OF PARTNERS CA (41)Cash Flows (42)!15 PAGE 1196 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (82)! NOTE 5 OIL AND GAS PRODUC (83)! NOTE 6 RELATED PARTY TRAN (18)! NOTE 6 RELATED PARTY TRAN (19) NOTE 7 OIL AND GAS INFOR (107) NOTE 7 OIL AND GAS INFOR (108) NOTE 7 OIL AND GAS INFOR (109)! 18 PAGE 1199 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (22)Beneficial Ownership (22)PARKER PARSLEY 90C LP (1)INDEX TO EXHIBITS (20)SELECTED FINANCIAL DATA (41) SUPPLEMENTAL INFORMATION (34)Balance Sheet (42)Income Statement (43) STATEMENTS OF PARTNERS CA (42)Cash Flows (43)!8 PAGE 1219 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (84)! NOTE 5 OIL AND GAS PRODUC (85)! 9 PAGE 1220 NOTE 6 RELATED PAR! 9 PAGE 1220 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (110) NOTE 7 OIL AND GAS INFOR (111) NOTE 7 OIL AND GAS INFOR (112)! 11 PAGE 1222 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (42) SUPPLEMENTAL INFORMATION (35)Balance Sheet (43)Income Statement (44) STATEMENTS OF PARTNERS CA (43)Cash Flows (44)!8 PAGE 1238 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (86)! 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SECURITIES AND EXC!CALCULATION OF REGISTRATION FEETO BE HELD ON 2001TABLE OF CONTENTSPAGE 7 LIST OF APPENDICES!LIMITED PARTNER INVESTMENT REPA 5 PAGE 15 NYMEX FUTURES PRICES!EXAMPLE CALCULATION OF MERGER VIncome StatementIncome Statement (1)AT DECEMBER 31 2000!15 PAGE 25 COMPARATIVE PER SHAR!25 PAGE 35 REASONS FOR THE MERGFAIRNESS OPINIONFAIRNESS OPINION (1)!LEGAL OPINION FOR LIMITED PARTN!LEGAL OPINION FOR LIMITED P (1)!NONMANAGING GENERAL PARTNERS OF!49 PAGE 59 PAYMENT OF EXPENSES !58 PAGE 68 COMPARATIVE PER SHAR!60 PAGE 70 OWNERSHIP OF PARTNER PIONEER PIONEER USATHE DRILLING PARTNERSHIPSTHE DRILLING PARTNERSHIPS (1)THE INCOME PARTNERSHIPS INTERESTSINTERESTS (1)INTERESTS (2)INTERESTS (3)INTERESTS (4)INTERESTS (5)!WHERE YOU CAN FIND MORE INFORMAAS OF DECEMBER 31 2000YEAR ENDED DECEMBER 31 2000!QUANTITIES OF OIL AND GAS RESER!STANDARDIZED MEASURE OF DISCOUN CASH FLOWSAS OF MARCH 31 2001AS OF MARCH 31 2001 (1)AS OF MARCH 31 2001 (2)AS OF MARCH 31 2001 (3)AS OF MARCH 31 2001 (4)AS OF MARCH 31 2001 (5)!FROM INCEPTION THROUGH MARCH 31!ANNUAL REPURCHASE PRICES AND AGOF EACH PARTNERSHIP!FOR THE THREE MONTHS ENDED MARCAS OF DECEMBER 31 2000 (1)AS OF MARCH 31 2001 (6)!THE YEARS ENDED DECEMBER 31 200AS OF DECEMBER 31 2000 (2)DECEMBER 31 2000 AND 1999EFFECTIVE DECEMBER 31 2000 EFFECTIVE DECEMBER 31 2000 (1) RECITALS RECITALS (1) SUPPLEMENTAL INFORMATION TABLEBalance SheetIncome Statement (2) STATEMENTS OF PARTNERS CAPITALCash Flows (1)NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCING A! NOTE 5 OIL AND GAS PRODUCI (1)! NOTE 6 RELATED PARTY TRANSACTI! NOTE 6 RELATED PARTY TRANS (1)! NOTE 7 OIL AND GAS INFORMATION! NOTE 7 OIL AND GAS INFORMA (1)! NOTE 7 OIL AND GAS INFORMA (2)!11 PAGE 163 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA SUPPLEMENTAL INFORMATION T (1)Balance Sheet (1)Income Statement (3) STATEMENTS OF PARTNERS CAP (1)Cash Flows (2)NOTE 4 INCOME TAXES (1)! NOTE 5 OIL AND GAS PRODUCI (2)! NOTE 5 OIL AND GAS PRODUCI (3)! 9 PAGE 180 NOTE 6 RELATED PAR! 9 PAGE 180 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORMA (3)! NOTE 7 OIL AND GAS INFORMA (4)! NOTE 7 OIL AND GAS INFORMA (5)!11 PAGE 182 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (1) SUPPLEMENTAL INFORMATION T (2) ITEM 6 SELECTED FINANCIAL DATAINDEX TO FINANCIAL STATEMENTSBalance Sheet (2)Income Statement (4) STATEMENTS OF PARTNERS CAP (2)Cash Flows (3)!15 PAGE 205 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCI (4)! NOTE 5 OIL AND GAS PRODUCI (5)! NOTE 6 RELATED PARTY TRANS (2)! NOTE 6 RELATED PARTY TRANS (3)! NOTE 7 OIL AND GAS INFORMA (6)! NOTE 7 OIL AND GAS INFORMA (7)! NOTE 7 OIL AND GAS INFORMA (8)! NOTE 7 OIL AND GAS INFORMA (9)! NOTE 7 OIL AND GAS INFORM (10)! 18 PAGE 208 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECUTIVEBeneficial OwnershipPARKER PARSLEY 82I LTDINDEX TO EXHIBITSSELECTED FINANCIAL DATA (2) SUPPLEMENTAL INFORMATION T (3) ITEM 6 SELECTED FINANCIAL (1)INDEX TO FINANCIAL STATEM (1)Balance Sheet (3)Income Statement (5) STATEMENTS OF PARTNERS CAP (3)Cash Flows (4)NOTE 4 INCOME TAXES (2)! NOTE 5 OIL AND GAS PRODUCI (6)! NOTE 5 OIL AND GAS PRODUCI (7)! 16 PAGE 236 NOTE 6 RELATED PAR! 16 PAGE 236 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (11)! NOTE 7 OIL AND GAS INFORM (12)! NOTE 7 OIL AND GAS INFORM (13)!18 PAGE 238 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (1)Beneficial Ownership (1)PARKER PARSLEY 82II LTDINDEX TO EXHIBITS (1)SELECTED FINANCIAL DATA (3) SUPPLEMENTAL INFORMATION T (4)Balance Sheet (4)Income Statement (6) STATEMENTS OF PARTNERS CAP (4)Cash Flows (5)NOTE 4 INCOME TAXES (3)! NOTE 5 OIL AND GAS PRODUCI (8)! NOTE 5 OIL AND GAS PRODUCI (9)! 9 PAGE 259 NOTE 6 RELATED PART! 9 PAGE 259 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (14)! NOTE 7 OIL AND GAS INFORM (15)! NOTE 7 OIL AND GAS INFORM (16)!11 PAGE 261 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (4) SUPPLEMENTAL INFORMATION T (5)PARKER PARSLEY 83A LTD ITEM 6 SELECTED FINANCIAL (2)INDEX TO FINANCIAL STATEM (2)Balance Sheet (5)Income Statement (7) STATEMENTS OF PARTNERS CAP (5)Cash Flows (6)NOTE 4 INCOME TAXES (4)! NOTE 5 OIL AND GAS PRODUC (10)! NOTE 5 OIL AND GAS PRODUC (11)! 16 PAGE 285 NOTE 6 RELATED PAR! 16 PAGE 285 NOTE 6 RELATED (1)!NOTE 7 OIL AND GAS INFORMATION  NOTE 7 OIL AND GAS INFORMA (1) NOTE 7 OIL AND GAS INFORMA (2)! 18 PAGE 287 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECU (2)Beneficial Ownership (2)PARKER PARSLEY 83A LTD (1)INDEX TO EXHIBITS (2)SELECTED FINANCIAL DATA (5) SUPPLEMENTAL INFORMATION T (6)PARKER PARSLEY 83B LTD ITEM 6 SELECTED FINANCIAL (3)INDEX TO FINANCIAL STATEM (3)Balance Sheet (6)Income Statement (8) STATEMENTS OF PARTNERS CAP (6)Cash Flows (7)NOTE 4 INCOME TAXES (5)! NOTE 5 OIL AND GAS PRODUC (12)! NOTE 5 OIL AND GAS PRODUC (13)! 16 PAGE 315 NOTE 6 RELATED PAR! 16 PAGE 315 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (3) NOTE 7 OIL AND GAS INFORMA (4) NOTE 7 OIL AND GAS INFORMA (5)!18 PAGE 317 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (3)Beneficial Ownership (3)PARKER PARSLEY 83B LTD (1)INDEX TO EXHIBITS (3)SELECTED FINANCIAL DATA (6) SUPPLEMENTAL INFORMATION T (7)PARKER PARSLEY 84A LTD ITEM 6 SELECTED FINANCIAL (4)INDEX TO FINANCIAL STATEM (4)Balance Sheet (7)Income Statement (9) STATEMENTS OF PARTNERS CAP (7)Cash Flows (8)!15 PAGE 344 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (14)! NOTE 5 OIL AND GAS PRODUC (15)! 16 PAGE 345 NOTE 6 RELATED PAR! 16 PAGE 345 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (6) NOTE 7 OIL AND GAS INFORMA (7) NOTE 7 OIL AND GAS INFORMA (8)!18 PAGE 347 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (4)Beneficial Ownership (4)PARKER PARSLEY 84A LTD (1)INDEX TO EXHIBITS (4)SELECTED FINANCIAL DATA (7) SUPPLEMENTAL INFORMATION T (8)PARKER PARSLEY 85A LTD ITEM 6 SELECTED FINANCIAL (5)INDEX TO FINANCIAL STATEM (5)Balance Sheet (8)Income Statement (10) STATEMENTS OF PARTNERS CAP (8)Cash Flows (9)NOTE 4 INCOME TAXES (6)! NOTE 5 OIL AND GAS PRODUC (16)! NOTE 5 OIL AND GAS PRODUC (17)! 16 PAGE 375 NOTE 6 RELATED PAR! 16 PAGE 375 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (9) NOTE 7 OIL AND GAS INFORM (10) NOTE 7 OIL AND GAS INFORM (11)!18 PAGE 377 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (5)Beneficial Ownership (5)PARKER PARSLEY 85A LTD (1)INDEX TO EXHIBITS (5)SELECTED FINANCIAL DATA (8) SUPPLEMENTAL INFORMATION T (9)PARKER PARSLEY 85B LTD ITEM 6 SELECTED FINANCIAL (6)!7 PAGE 396 ITEM 8 FINANCIAL STABalance Sheet (9) STATEMENTS OF PARTNERS CAP (9)Cash Flows (10)!15 PAGE 404 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (18)! NOTE 5 OIL AND GAS PRODUC (19)! 16 PAGE 405 NOTE 6 RELATED PAR! 16 PAGE 405 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (12) NOTE 7 OIL AND GAS INFORM (13) NOTE 7 OIL AND GAS INFORM (14)!18 PAGE 407 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (6)Beneficial Ownership (6)PARKER PARSLEY 85B LTD (1)INDEX TO EXHIBITS (6)SELECTED FINANCIAL DATA (9) SUPPLEMENTAL INFORMATION (10)Balance Sheet (10)Income Statement (11) STATEMENTS OF PARTNERS CA (10)Cash Flows (11)NOTE 4 INCOME TAXES (7)! NOTE 5 OIL AND GAS PRODUC (20)! NOTE 5 OIL AND GAS PRODUC (21)! 9 PAGE 428 NOTE 6 RELATED PART! 9 PAGE 428 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (15) NOTE 7 OIL AND GAS INFORM (16) NOTE 7 OIL AND GAS INFORM (17)! 11 PAGE 430 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (10) SUPPLEMENTAL INFORMATION (11)Balance Sheet (11)Income Statement (12) STATEMENTS OF PARTNERS CA (11)Cash Flows (12) 8 PAGE 446 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (22)! NOTE 5 OIL AND GAS PRODUC (23)! 9 PAGE 447 NOTE 6 RELATED PART! 9 PAGE 447 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (18) NOTE 7 OIL AND GAS INFORM (19) NOTE 7 OIL AND GAS INFORM (20)! 11 PAGE 449 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (11) SUPPLEMENTAL INFORMATION (12)PARKER PARSLEY 86A LTD ITEM 6 SELECTED FINANCIAL (7)INDEX TO FINANCIAL STATEM (6)Balance Sheet (12)Income Statement (13) STATEMENTS OF PARTNERS CA (12)Cash Flows (13)NOTE 4 INCOME TAXES (8)! NOTE 5 OIL AND GAS PRODUC (24)! NOTE 5 OIL AND GAS PRODUC (25)! 16 PAGE 473 NOTE 6 RELATED PAR! 16 PAGE 473 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (21) NOTE 7 OIL AND GAS INFORM (22) NOTE 7 OIL AND GAS INFORM (23)!18 PAGE 475 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (7)Beneficial Ownership (7)PARKER PARSLEY 86A LTD (1)INDEX TO EXHIBITS (7)SELECTED FINANCIAL DATA (12) SUPPLEMENTAL INFORMATION (13)PARKER PARSLEY 86B LTD ITEM 6 SELECTED FINANCIAL (8)INDEX TO FINANCIAL STATEM (7)Balance Sheet (13)Income Statement (14) STATEMENTS OF PARTNERS CA (13)Cash Flows (14)!16 PAGE 503 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (26)! NOTE 5 OIL AND GAS PRODUC (27)! NOTE 6 RELATED PARTY TRANS (4)! NOTE 6 RELATED PARTY TRANS (5) NOTE 7 OIL AND GAS INFORM (24) NOTE 7 OIL AND GAS INFORM (25) NOTE 7 OIL AND GAS INFORM (26)!19 PAGE 506 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (8)Beneficial Ownership (8)PARKER PARSLEY 86B LTD (1)INDEX TO EXHIBITS (8)SELECTED FINANCIAL DATA (13) SUPPLEMENTAL INFORMATION (14) ITEM 6 SELECTED FINANCIAL (9)!7 PAGE 525 ITEM 8 FINANCIAL STABalance Sheet (14)Income Statement (15) STATEMENTS OF PARTNERS CA (14)Cash Flows (15)NOTE 4 INCOME TAXES (9)! NOTE 5 OIL AND GAS PRODUC (28)! NOTE 5 OIL AND GAS PRODUC (29)! 16 PAGE 534 NOTE 6 RELATED PAR! 16 PAGE 534 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (27) NOTE 7 OIL AND GAS INFORM (28) NOTE 7 OIL AND GAS INFORM (29)!18 PAGE 536 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (9)Beneficial Ownership (9)PARKER PARSLEY 86C LTDSELECTED FINANCIAL DATA (14) SUPPLEMENTAL INFORMATION (15)Balance Sheet (15)Income Statement (16) STATEMENTS OF PARTNERS CA (15)Cash Flows (16) 8 PAGE 556 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (30)! NOTE 5 OIL AND GAS PRODUC (31)! NOTE 6 RELATED PARTY TRANS (6)! NOTE 6 RELATED PARTY TRANS (7) NOTE 7 OIL AND GAS INFORM (30) NOTE 7 OIL AND GAS INFORM (31) NOTE 7 OIL AND GAS INFORM (32)! 11 PAGE 559 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (15) SUPPLEMENTAL INFORMATION (16)Balance Sheet (16)Income Statement (17) STATEMENTS OF PARTNERS CA (16)Cash Flows (17)NOTE 4 INCOME TAXES (10)! NOTE 5 OIL AND GAS PRODUC (32)! NOTE 5 OIL AND GAS PRODUC (33)! 9 PAGE 576 NOTE 6 RELATED PART! 9 PAGE 576 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (33) NOTE 7 OIL AND GAS INFORM (34) NOTE 7 OIL AND GAS INFORM (35)!11 PAGE 578 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (16) SUPPLEMENTAL INFORMATION (17) ITEM 6 SELECTED FINANCIAL (10)!8 PAGE 594 ITEM 8 FINANCIAL STABalance Sheet (17)Income Statement (18) STATEMENTS OF PARTNERS CA (17)Cash Flows (18)NOTE 4 INCOME TAXES (11)! NOTE 5 OIL AND GAS PRODUC (34)! NOTE 5 OIL AND GAS PRODUC (35)! 17 PAGE 603 NOTE 6 RELATED PAR! 17 PAGE 603 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (36) NOTE 7 OIL AND GAS INFORM (37) NOTE 7 OIL AND GAS INFORM (38)! 19 PAGE 605 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (10)Beneficial Ownership (10)PARKER PARSLEY 87A LTDSELECTED FINANCIAL DATA (17) SUPPLEMENTAL INFORMATION (18)Balance Sheet (18)Income Statement (19) STATEMENTS OF PARTNERS CA (18)Cash Flows (19) 8 PAGE 625 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (36)! NOTE 5 OIL AND GAS PRODUC (37)! 9 PAGE 626 NOTE 6 RELATED PART! 9 PAGE 626 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (39) NOTE 7 OIL AND GAS INFORM (40) NOTE 7 OIL AND GAS INFORM (41)! 11 PAGE 628 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (18) SUPPLEMENTAL INFORMATION (19) ITEM 6 SELECTED FINANCIAL (11)INDEX TO FINANCIAL STATEM (8)Balance Sheet (19)Income Statement (20) STATEMENTS OF PARTNERS CA (19)Cash Flows (20)NOTE 4 INCOME TAXES (12)! NOTE 5 OIL AND GAS PRODUC (38)! NOTE 5 OIL AND GAS PRODUC (39)! 17 PAGE 653 NOTE 6 RELATED PAR! 17 PAGE 653 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (42) NOTE 7 OIL AND GAS INFORM (43) NOTE 7 OIL AND GAS INFORM (44)! 19 PAGE 655 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (11)Beneficial Ownership (11)PARKER PARSLEY 87B LTDINDEX TO EXHIBITS (9)SELECTED FINANCIAL DATA (19) SUPPLEMENTAL INFORMATION (20) ITEM 6 SELECTED FINANCIAL (12)INDEX TO FINANCIAL STATEM (9)Balance Sheet (20)Income Statement (21) STATEMENTS OF PARTNERS CA (20)Cash Flows (21)!16 PAGE 683 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (40)! NOTE 5 OIL AND GAS PRODUC (41)! NOTE 6 RELATED PARTY TRANS (8)! NOTE 6 RELATED PARTY TRANS (9) NOTE 7 OIL AND GAS INFORM (45) NOTE 7 OIL AND GAS INFORM (46) NOTE 7 OIL AND GAS INFORM (47)!19 PAGE 686 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (12)Beneficial Ownership (12)PROPERTIES 87A LTDINDEX TO EXHIBITS (10)SELECTED FINANCIAL DATA (20) SUPPLEMENTAL INFORMATION (21) ITEM 6 SELECTED FINANCIAL (13)INDEX TO FINANCIAL STATE (10)Balance Sheet (21)Income Statement (22) STATEMENTS OF PARTNERS CA (21)Cash Flows (22)!16 PAGE 714 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (42)! NOTE 5 OIL AND GAS PRODUC (43)! 17 PAGE 715 NOTE 6 RELATED PAR! 17 PAGE 715 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (48) NOTE 7 OIL AND GAS INFORM (49) NOTE 7 OIL AND GAS INFORM (50)! 19 PAGE 717 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (13)Beneficial Ownership (13)PROPERTIES 87B LTDINDEX TO EXHIBITS (11)SELECTED FINANCIAL DATA (21) SUPPLEMENTAL INFORMATION (22)Balance Sheet (22)Income Statement (23) STATEMENTS OF PARTNERS CA (22)Cash Flows (23) 8 PAGE 737 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (44)! NOTE 5 OIL AND GAS PRODUC (45)! 9 PAGE 738 NOTE 6 RELATED PART! 9 PAGE 738 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (51) NOTE 7 OIL AND GAS INFORM (52) NOTE 7 OIL AND GAS INFORM (53)! 11 PAGE 740 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (22) SUPPLEMENTAL INFORMATION (23)Balance Sheet (23)Income Statement (24) STATEMENTS OF PARTNERS CA (23)Cash Flows (24) 8 PAGE 756 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (46)! NOTE 5 OIL AND GAS PRODUC (47)! 9 PAGE 757 NOTE 6 RELATED PART! 9 PAGE 757 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (54) NOTE 7 OIL AND GAS INFORM (55) NOTE 7 OIL AND GAS INFORM (56)! 11 PAGE 759 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (23)!31 2000 1 PAGE 766 PARKER PARSLPARKER PARSLEY 88A LP ITEM 6 SELECTED FINANCIAL (14)INDEX TO FINANCIAL STATE (11)Balance Sheet (24)Income Statement (25) STATEMENTS OF PARTNERS CA (24)Cash Flows (25)NOTE 4 INCOME TAXES (13)! NOTE 5 OIL AND GAS PRODUC (48)! NOTE 5 OIL AND GAS PRODUC (49)! 16 PAGE 783 NOTE 6 RELATED PAR! 16 PAGE 783 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (57) NOTE 7 OIL AND GAS INFORM (58) NOTE 7 OIL AND GAS INFORM (59)! 18 PAGE 785 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (14)Beneficial Ownership (14)PARKER PARSLEY 88A LP (1)INDEX TO EXHIBITS (12)SELECTED FINANCIAL DATA (24) SUPPLEMENTAL INFORMATION (24)Balance Sheet (25)Income Statement (26) STATEMENTS OF PARTNERS CA (25)Cash Flows (26) 8 PAGE 805 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (50)! NOTE 5 OIL AND GAS PRODUC (51)! 9 PAGE 806 NOTE 6 RELATED PART! 9 PAGE 806 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (60) NOTE 7 OIL AND GAS INFORM (61) NOTE 7 OIL AND GAS INFORM (62)! 11 PAGE 808 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (25)!31 2000 1 PAGE 815 PARKER PARSLPARKER PARSLEY 88B LP ITEM 6 SELECTED FINANCIAL (15)INDEX TO FINANCIAL STATE (12)Balance Sheet (26)Income Statement (27) STATEMENTS OF PARTNERS CA (26)Cash Flows (27)!16 PAGE 832 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (52)! NOTE 5 OIL AND GAS PRODUC (53)! 17 PAGE 833 NOTE 6 RELATED PAR! 17 PAGE 833 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (63) NOTE 7 OIL AND GAS INFORM (64) NOTE 7 OIL AND GAS INFORM (65)! 19 PAGE 835 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (15)Beneficial Ownership (15)PARKER PARSLEY 88B LP (1)INDEX TO EXHIBITS (13)SELECTED FINANCIAL DATA (26) SUPPLEMENTAL INFORMATION (25)Balance Sheet (27)Income Statement (28) STATEMENTS OF PARTNERS CA (27)Cash Flows (28) 8 PAGE 855 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (54)! NOTE 5 OIL AND GAS PRODUC (55)! 9 PAGE 856 NOTE 6 RELATED PART! 9 PAGE 856 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (66) NOTE 7 OIL AND GAS INFORM (67) NOTE 7 OIL AND GAS INFORM (68)! 11 PAGE 858 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (27)!31 2000 1 PAGE 865 PARKER PARSLBalance Sheet (28)Income Statement (29) STATEMENTS OF PARTNERS CA (28)Cash Flows (29) 8 PAGE 874 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (56)! NOTE 5 OIL AND GAS PRODUC (57)! 9 PAGE 875 NOTE 6 RELATED PART! 9 PAGE 875 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (69) NOTE 7 OIL AND GAS INFORM (70) NOTE 7 OIL AND GAS INFORM (71)! 11 PAGE 877 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (28) SUPPLEMENTAL INFORMATION (26)!PARKER PARSLEY PRODUCING PROPER ITEM 6 SELECTED FINANCIAL (16)INDEX TO FINANCIAL STATE (13)Balance Sheet (29)Income Statement (30) STATEMENTS OF PARTNERS CA (29)Cash Flows (30)NOTE 4 INCOME TAXES (14)! NOTE 5 OIL AND GAS PRODUC (58)! NOTE 5 OIL AND GAS PRODUC (59)! 16 PAGE 901 NOTE 6 RELATED PAR! 16 PAGE 901 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (72) NOTE 7 OIL AND GAS INFORM (73)!18 PAGE 903 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (16)Beneficial Ownership (16)PROPERTIES 88A LPINDEX TO EXHIBITS (14)SELECTED FINANCIAL DATA (29) SUPPLEMENTAL INFORMATION (27)Balance Sheet (30)Income Statement (31) STATEMENTS OF PARTNERS CA (30)Cash Flows (31)NOTE 4 INCOME TAXES (15)! NOTE 5 OIL AND GAS PRODUC (60)! NOTE 5 OIL AND GAS PRODUC (61)! 9 PAGE 924 NOTE 6 RELATED PART! 9 PAGE 924 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (74) NOTE 7 OIL AND GAS INFORM (75) NOTE 7 OIL AND GAS INFORM (76)! 11 PAGE 926 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (30) SUPPLEMENTAL INFORMATION (28)Balance Sheet (31)Income Statement (32) STATEMENTS OF PARTNERS CA (31)Cash Flows (32)NOTE 4 INCOME TAXES (16)! NOTE 5 OIL AND GAS PRODUC (62)! NOTE 5 OIL AND GAS PRODUC (63)! 9 PAGE 943 NOTE 6 RELATED PART! 9 PAGE 943 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (77) NOTE 7 OIL AND GAS INFORM (78) NOTE 7 OIL AND GAS INFORM (79)!11 PAGE 945 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (31)!31 2000 1 PAGE 952 PARKER PARSLPARKER PARSLEY 89A LP ITEM 6 SELECTED FINANCIAL (17)INDEX TO FINANCIAL STATE (14)Balance Sheet (32)Income Statement (33) STATEMENTS OF PARTNERS CA (32)Cash Flows (33)NOTE 4 INCOME TAXES (17)! NOTE 5 OIL AND GAS PRODUC (64)! NOTE 5 OIL AND GAS PRODUC (65)! 16 PAGE 969 NOTE 6 RELATED PAR! 16 PAGE 969 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (80) NOTE 7 OIL AND GAS INFORM (81) NOTE 7 OIL AND GAS INFORM (82) NOTE 7 OIL AND GAS INFORM (83)! 18 PAGE 971 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (17)Beneficial Ownership (17)PARKER PARSLEY 89A LP (1)INDEX TO EXHIBITS (15)SELECTED FINANCIAL DATA (32) SUPPLEMENTAL INFORMATION (29)Balance Sheet (33)Income Statement (34) STATEMENTS OF PARTNERS CA (33)Cash Flows (34) 8 PAGE 991 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (66)! NOTE 5 OIL AND GAS PRODUC (67)! 9 PAGE 992 NOTE 6 RELATED PART! 9 PAGE 992 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (84) NOTE 7 OIL AND GAS INFORM (85) NOTE 7 OIL AND GAS INFORM (86)! 11 PAGE 994 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (33)!31 2000 1 PAGE 1001 PARKER PARSBalance Sheet (34)Income Statement (35) STATEMENTS OF PARTNERS CA (34)Cash Flows (35)!8 PAGE 1010 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (68)! NOTE 5 OIL AND GAS PRODUC (69)! 9 PAGE 1011 NOTE 6 RELATED PAR! 9 PAGE 1011 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (87) NOTE 7 OIL AND GAS INFORM (88) NOTE 7 OIL AND GAS INFORM (89)!11 PAGE 1013 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (34) SUPPLEMENTAL INFORMATION (30)Balance Sheet (35)Income Statement (36) STATEMENTS OF PARTNERS CA (35)Cash Flows (36)!8 PAGE 1029 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (70)! NOTE 5 OIL AND GAS PRODUC (71)! 9 PAGE 1030 NOTE 6 RELATED PAR! 9 PAGE 1030 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (90) NOTE 7 OIL AND GAS INFORM (91) NOTE 7 OIL AND GAS INFORM (92)! 11 PAGE 1032 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (35) SUPPLEMENTAL INFORMATION (31)Balance Sheet (36)Income Statement (37) STATEMENTS OF PARTNERS CA (36)Cash Flows (37)!8 PAGE 1048 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (72)! NOTE 5 OIL AND GAS PRODUC (73)! 9 PAGE 1049 NOTE 6 RELATED PAR! 9 PAGE 1049 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (93) NOTE 7 OIL AND GAS INFORM (94) NOTE 7 OIL AND GAS INFORM (95)! 11 PAGE 1051 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (36)!31 2000 1 PAGE 1058 PARKER PARSPARKER PARSLEY 90A LP ITEM 6 SELECTED FINANCIAL (18)INDEX TO FINANCIAL STATE (15)Balance Sheet (37)Income Statement (38) STATEMENTS OF PARTNERS CA (37)Cash Flows (38)!15 PAGE 1074 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (74)! NOTE 5 OIL AND GAS PRODUC (75)! NOTE 6 RELATED PARTY TRAN (10)! NOTE 6 RELATED PARTY TRAN (11) NOTE 7 OIL AND GAS INFORM (96) NOTE 7 OIL AND GAS INFORM (97)! 18 PAGE 1077 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (18)Beneficial Ownership (18)PARKER PARSLEY 90A LP (1)INDEX TO EXHIBITS (16)SELECTED FINANCIAL DATA (37) SUPPLEMENTAL INFORMATION (32)PARKER PARSLEY 90B CONV LP ITEM 6 SELECTED FINANCIAL (19)INDEX TO FINANCIAL STATE (16)Balance Sheet (38)Income Statement (39) STATEMENTS OF PARTNERS CA (38)Cash Flows (39)!16 PAGE 1105 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (76)! NOTE 5 OIL AND GAS PRODUC (77)! NOTE 6 RELATED PARTY TRAN (12)! NOTE 6 RELATED PARTY TRAN (13) NOTE 7 OIL AND GAS INFORM (98) NOTE 7 OIL AND GAS INFORM (99) NOTE 7 OIL AND GAS INFOR (100)! 19 PAGE 1108 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (19)Beneficial Ownership (19) PARKER PARSLEY 90B CONV LP (1)INDEX TO EXHIBITS (17)SELECTED FINANCIAL DATA (38)!31 2000 1 PAGE 1119 PARKER PARSPARKER PARSLEY 90B LP ITEM 6 SELECTED FINANCIAL (20)INDEX TO FINANCIAL STATE (17)Balance Sheet (39)Income Statement (40) STATEMENTS OF PARTNERS CA (39)Cash Flows (40)!16 PAGE 1136 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (78)! NOTE 5 OIL AND GAS PRODUC (79)! NOTE 6 RELATED PARTY TRAN (14)! NOTE 6 RELATED PARTY TRAN (15) NOTE 7 OIL AND GAS INFOR (101) NOTE 7 OIL AND GAS INFOR (102) NOTE 7 OIL AND GAS INFOR (103)! 19 PAGE 1139 NOTE 8 MAJOR CUS!ITEM 10 DIRECTORS AND EXEC (20)Beneficial Ownership (20)PARKER PARSLEY 90B LP (1)INDEX TO EXHIBITS (18)SELECTED FINANCIAL DATA (39) SUPPLEMENTAL INFORMATION (33)PARKER PARSLEY 90C CONV LP ITEM 6 SELECTED FINANCIAL (21)INDEX TO FINANCIAL STATE (18)Balance Sheet (40)Income Statement (41) STATEMENTS OF PARTNERS CA (40)Cash Flows (41)!15 PAGE 1166 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (80)! NOTE 5 OIL AND GAS PRODUC (81)! NOTE 6 RELATED PARTY TRAN (16)! NOTE 6 RELATED PARTY TRAN (17) NOTE 7 OIL AND GAS INFOR (104) NOTE 7 OIL AND GAS INFOR (105) NOTE 7 OIL AND GAS INFOR (106)! 18 PAGE 1169 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (21)Beneficial Ownership (21) PARKER PARSLEY 90C CONV LP (1)INDEX TO EXHIBITS (19)SELECTED FINANCIAL DATA (40)!31 2000 1 PAGE 1180 PARKER PARSPARKER PARSLEY 90C LP ITEM 6 SELECTED FINANCIAL (22)INDEX TO FINANCIAL STATE (19)Balance Sheet (41)Income Statement (42) STATEMENTS OF PARTNERS CA (41)Cash Flows (42)!15 PAGE 1196 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (82)! NOTE 5 OIL AND GAS PRODUC (83)! NOTE 6 RELATED PARTY TRAN (18)! NOTE 6 RELATED PARTY TRAN (19) NOTE 7 OIL AND GAS INFOR (107) NOTE 7 OIL AND GAS INFOR (108) NOTE 7 OIL AND GAS INFOR (109)! 18 PAGE 1199 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (22)Beneficial Ownership (22)PARKER PARSLEY 90C LP (1)INDEX TO EXHIBITS (20)SELECTED FINANCIAL DATA (41) SUPPLEMENTAL INFORMATION (34)Balance Sheet (42)Income Statement (43) STATEMENTS OF PARTNERS CA (42)Cash Flows (43)!8 PAGE 1219 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (84)! NOTE 5 OIL AND GAS PRODUC (85)! 9 PAGE 1220 NOTE 6 RELATED PAR! 9 PAGE 1220 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (110) NOTE 7 OIL AND GAS INFOR (111) NOTE 7 OIL AND GAS INFOR (112)! 11 PAGE 1222 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (42) SUPPLEMENTAL INFORMATION (35)Balance Sheet (43)Income Statement (44) STATEMENTS OF PARTNERS CA (43)Cash Flows (44)!8 PAGE 1238 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (86)! NOTE 5 OIL AND GAS PRODUC (87)! 9 PAGE 1239 NOTE 6 RELATED PAR! 9 PAGE 1239 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (113) NOTE 7 OIL AND GAS INFOR (114) NOTE 7 OIL AND GAS INFOR (115)! 11 PAGE 1241 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (43)!31 2000 1 PAGE 1248 PARKER PARSPARKER PARSLEY 91A LP ITEM 6 SELECTED FINANCIAL (23)INDEX TO FINANCIAL STATE (20)Balance Sheet (44)Income Statement (45) STATEMENTS OF PARTNERS CA (44)Cash Flows (45)!15 PAGE 1264 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (88)! NOTE 5 OIL AND GAS PRODUC (89)! NOTE 6 RELATED PARTY TRAN (20)! NOTE 6 RELATED PARTY TRAN (21) NOTE 7 OIL AND GAS INFOR (116) NOTE 7 OIL AND GAS INFOR (117) NOTE 7 OIL AND GAS INFOR (118)! 18 PAGE 1267 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (23)Beneficial Ownership (23)PARKER PARSLEY 91A LP (1)INDEX TO EXHIBITS (21)SELECTED FINANCIAL DATA (44)!31 2000 1 PAGE 1278 PARKER PARSPARKER PARSLEY 91B LP ITEM 6 SELECTED FINANCIAL (24)INDEX TO FINANCIAL STATE (21)Balance Sheet (45)Income Statement (46) STATEMENTS OF PARTNERS CA (45)Cash Flows (46)!15 PAGE 1294 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (90)! NOTE 5 OIL AND GAS PRODUC (91)! NOTE 6 RELATED PARTY TRAN (22)! 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SECURITIES AND EXC!CALCULATION OF REGISTRATION FEETO BE HELD ON 2001TABLE OF CONTENTSPAGE 7 LIST OF APPENDICES!LIMITED PARTNER INVESTMENT REPA!LIMITED PARTNER INVESTMENT (1)!EXAMPLE CALCULATION OF MERGER VIncome StatementIncome Statement (1)AT DECEMBER 31 2000!15 PAGE 25 COMPARATIVE PER SHAR!25 PAGE 35 REASONS FOR THE MERGFAIRNESS OPINIONFAIRNESS OPINION (1)!LEGAL OPINION FOR LIMITED PARTN!LEGAL OPINION FOR LIMITED P (1)!NONMANAGING GENERAL PARTNERS OF!49 PAGE 59 PAYMENT OF EXPENSES !58 PAGE 68 COMPARATIVE PER SHAR!60 PAGE 70 OWNERSHIP OF PARTNER PIONEER PIONEER USATHE DRILLING PARTNERSHIPSTHE DRILLING PARTNERSHIPS (1)THE INCOME PARTNERSHIPS INTERESTSINTERESTS (1)INTERESTS (2)INTERESTS (3)INTERESTS (4)INTERESTS (5)!WHERE YOU CAN FIND MORE INFORMAAS OF DECEMBER 31 2000YEAR ENDED DECEMBER 31 2000!QUANTITIES OF OIL AND GAS RESER!STANDARDIZED MEASURE OF DISCOUN CASH FLOWSAS OF MARCH 31 2001AS OF MARCH 31 2001 (1)AS OF MARCH 31 2001 (2)AS OF MARCH 31 2001 (3)AS OF MARCH 31 2001 (4)AS OF MARCH 31 2001 (5)!FROM INCEPTION THROUGH MARCH 31!ANNUAL REPURCHASE PRICES AND AGOF EACH PARTNERSHIP!FOR THE THREE MONTHS ENDED MARCAS OF DECEMBER 31 2000 (1)AS OF MARCH 31 2001 (6)!THE YEARS ENDED DECEMBER 31 200AS OF DECEMBER 31 2000 (2)DECEMBER 31 2000 AND 1999EFFECTIVE DECEMBER 31 2000 EFFECTIVE DECEMBER 31 2000 (1) RECITALS RECITALS (1) SUPPLEMENTAL INFORMATION TABLEBalance SheetIncome Statement (2) STATEMENTS OF PARTNERS CAPITALCash Flows (1)NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCING A! NOTE 5 OIL AND GAS PRODUCI (1)! NOTE 6 RELATED PARTY TRANSACTI! NOTE 6 RELATED PARTY TRANS (1)! NOTE 7 OIL AND GAS INFORMATION! NOTE 7 OIL AND GAS INFORMA (1)! NOTE 7 OIL AND GAS INFORMA (2)!11 PAGE 163 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA SUPPLEMENTAL INFORMATION T (1)Balance Sheet (1)Income Statement (3) STATEMENTS OF PARTNERS CAP (1)Cash Flows (2)NOTE 4 INCOME TAXES (1)! NOTE 5 OIL AND GAS PRODUCI (2)! NOTE 5 OIL AND GAS PRODUCI (3)! 9 PAGE 180 NOTE 6 RELATED PAR! 9 PAGE 180 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORMA (3)! NOTE 7 OIL AND GAS INFORMA (4)! NOTE 7 OIL AND GAS INFORMA (5)!11 PAGE 182 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (1) SUPPLEMENTAL INFORMATION T (2) ITEM 6 SELECTED FINANCIAL DATAINDEX TO FINANCIAL STATEMENTSBalance Sheet (2)Income Statement (4) STATEMENTS OF PARTNERS CAP (2)Cash Flows (3)!15 PAGE 205 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCI (4)! NOTE 5 OIL AND GAS PRODUCI (5)! NOTE 6 RELATED PARTY TRANS (2)! NOTE 6 RELATED PARTY TRANS (3)! NOTE 7 OIL AND GAS INFORMA (6)! NOTE 7 OIL AND GAS INFORMA (7)! NOTE 7 OIL AND GAS INFORMA (8)! NOTE 7 OIL AND GAS INFORMA (9)! NOTE 7 OIL AND GAS INFORM (10)! 18 PAGE 208 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECUTIVEBeneficial OwnershipPARKER PARSLEY 82I LTDINDEX TO EXHIBITSSELECTED FINANCIAL DATA (2) SUPPLEMENTAL INFORMATION T (3) ITEM 6 SELECTED FINANCIAL (1)INDEX TO FINANCIAL STATEM (1)Balance Sheet (3)Income Statement (5) STATEMENTS OF PARTNERS CAP (3)Cash Flows (4)NOTE 4 INCOME TAXES (2)! NOTE 5 OIL AND GAS PRODUCI (6)! NOTE 5 OIL AND GAS PRODUCI (7)! 16 PAGE 236 NOTE 6 RELATED PAR! 16 PAGE 236 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (11)! NOTE 7 OIL AND GAS INFORM (12)! NOTE 7 OIL AND GAS INFORM (13)!18 PAGE 238 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (1)Beneficial Ownership (1)PARKER PARSLEY 82II LTDINDEX TO EXHIBITS (1)SELECTED FINANCIAL DATA (3) SUPPLEMENTAL INFORMATION T (4)Balance Sheet (4)Income Statement (6) STATEMENTS OF PARTNERS CAP (4)Cash Flows (5)NOTE 4 INCOME TAXES (3)! NOTE 5 OIL AND GAS PRODUCI (8)! NOTE 5 OIL AND GAS PRODUCI (9)! 9 PAGE 259 NOTE 6 RELATED PART! 9 PAGE 259 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (14)! NOTE 7 OIL AND GAS INFORM (15)! NOTE 7 OIL AND GAS INFORM (16)!11 PAGE 261 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (4) SUPPLEMENTAL INFORMATION T (5)PARKER PARSLEY 83A LTD ITEM 6 SELECTED FINANCIAL (2)INDEX TO FINANCIAL STATEM (2)Balance Sheet (5)Income Statement (7) STATEMENTS OF PARTNERS CAP (5)Cash Flows (6)NOTE 4 INCOME TAXES (4)! NOTE 5 OIL AND GAS PRODUC (10)! NOTE 5 OIL AND GAS PRODUC (11)! 16 PAGE 285 NOTE 6 RELATED PAR! 16 PAGE 285 NOTE 6 RELATED (1)!NOTE 7 OIL AND GAS INFORMATION  NOTE 7 OIL AND GAS INFORMA (1) NOTE 7 OIL AND GAS INFORMA (2)! 18 PAGE 287 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECU (2)Beneficial Ownership (2)PARKER PARSLEY 83A LTD (1)INDEX TO EXHIBITS (2)SELECTED FINANCIAL DATA (5) SUPPLEMENTAL INFORMATION T (6)PARKER PARSLEY 83B LTD ITEM 6 SELECTED FINANCIAL (3)INDEX TO FINANCIAL STATEM (3)Balance Sheet (6)Income Statement (8) STATEMENTS OF PARTNERS CAP (6)Cash Flows (7)NOTE 4 INCOME TAXES (5)! NOTE 5 OIL AND GAS PRODUC (12)! NOTE 5 OIL AND GAS PRODUC (13)! 16 PAGE 315 NOTE 6 RELATED PAR! 16 PAGE 315 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (3) NOTE 7 OIL AND GAS INFORMA (4) NOTE 7 OIL AND GAS INFORMA (5)!18 PAGE 317 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (3)Beneficial Ownership (3)PARKER PARSLEY 83B LTD (1)INDEX TO EXHIBITS (3)SELECTED FINANCIAL DATA (6) SUPPLEMENTAL INFORMATION T (7)PARKER PARSLEY 84A LTD ITEM 6 SELECTED FINANCIAL (4)INDEX TO FINANCIAL STATEM (4)Balance Sheet (7)Income Statement (9) STATEMENTS OF PARTNERS CAP (7)Cash Flows (8)!15 PAGE 344 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (14)! NOTE 5 OIL AND GAS PRODUC (15)! 16 PAGE 345 NOTE 6 RELATED PAR! 16 PAGE 345 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (6) NOTE 7 OIL AND GAS INFORMA (7) NOTE 7 OIL AND GAS INFORMA (8)!18 PAGE 347 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (4)Beneficial Ownership (4)PARKER PARSLEY 84A LTD (1)INDEX TO EXHIBITS (4)SELECTED FINANCIAL DATA (7) SUPPLEMENTAL INFORMATION T (8)PARKER PARSLEY 85A LTD ITEM 6 SELECTED FINANCIAL (5)INDEX TO FINANCIAL STATEM (5)Balance Sheet (8)Income Statement (10) STATEMENTS OF PARTNERS CAP (8)Cash Flows (9)NOTE 4 INCOME TAXES (6)! NOTE 5 OIL AND GAS PRODUC (16)! NOTE 5 OIL AND GAS PRODUC (17)! 16 PAGE 375 NOTE 6 RELATED PAR! 16 PAGE 375 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (9) NOTE 7 OIL AND GAS INFORM (10) NOTE 7 OIL AND GAS INFORM (11)!18 PAGE 377 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (5)Beneficial Ownership (5)PARKER PARSLEY 85A LTD (1)INDEX TO EXHIBITS (5)SELECTED FINANCIAL DATA (8) SUPPLEMENTAL INFORMATION T (9)PARKER PARSLEY 85B LTD ITEM 6 SELECTED FINANCIAL (6)!7 PAGE 396 ITEM 8 FINANCIAL STABalance Sheet (9) STATEMENTS OF PARTNERS CAP (9)Cash Flows (10)!15 PAGE 404 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (18)! NOTE 5 OIL AND GAS PRODUC (19)! 16 PAGE 405 NOTE 6 RELATED PAR! 16 PAGE 405 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (12) NOTE 7 OIL AND GAS INFORM (13) NOTE 7 OIL AND GAS INFORM (14)!18 PAGE 407 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (6)Beneficial Ownership (6)PARKER PARSLEY 85B LTD (1)INDEX TO EXHIBITS (6)SELECTED FINANCIAL DATA (9) SUPPLEMENTAL INFORMATION (10)Balance Sheet (10)Income Statement (11) STATEMENTS OF PARTNERS CA (10)Cash Flows (11)NOTE 4 INCOME TAXES (7)! NOTE 5 OIL AND GAS PRODUC (20)! NOTE 5 OIL AND GAS PRODUC (21)! 9 PAGE 428 NOTE 6 RELATED PART! 9 PAGE 428 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (15) NOTE 7 OIL AND GAS INFORM (16) NOTE 7 OIL AND GAS INFORM (17)! 11 PAGE 430 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (10) SUPPLEMENTAL INFORMATION (11)Balance Sheet (11)Income Statement (12) STATEMENTS OF PARTNERS CA (11)Cash Flows (12) 8 PAGE 446 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (22)! NOTE 5 OIL AND GAS PRODUC (23)! 9 PAGE 447 NOTE 6 RELATED PART! 9 PAGE 447 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (18) NOTE 7 OIL AND GAS INFORM (19) NOTE 7 OIL AND GAS INFORM (20)! 11 PAGE 449 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (11) SUPPLEMENTAL INFORMATION (12)PARKER PARSLEY 86A LTD ITEM 6 SELECTED FINANCIAL (7)INDEX TO FINANCIAL STATEM (6)Balance Sheet (12)Income Statement (13) STATEMENTS OF PARTNERS CA (12)Cash Flows (13)NOTE 4 INCOME TAXES (8)! NOTE 5 OIL AND GAS PRODUC (24)! NOTE 5 OIL AND GAS PRODUC (25)! 16 PAGE 473 NOTE 6 RELATED PAR! 16 PAGE 473 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (21) NOTE 7 OIL AND GAS INFORM (22) NOTE 7 OIL AND GAS INFORM (23)!18 PAGE 475 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (7)Beneficial Ownership (7)PARKER PARSLEY 86A LTD (1)INDEX TO EXHIBITS (7)SELECTED FINANCIAL DATA (12) SUPPLEMENTAL INFORMATION (13)PARKER PARSLEY 86B LTD ITEM 6 SELECTED FINANCIAL (8)INDEX TO FINANCIAL STATEM (7)Balance Sheet (13)Income Statement (14) STATEMENTS OF PARTNERS CA (13)Cash Flows (14)!16 PAGE 503 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (26)! NOTE 5 OIL AND GAS PRODUC (27)! NOTE 6 RELATED PARTY TRANS (4)! NOTE 6 RELATED PARTY TRANS (5) NOTE 7 OIL AND GAS INFORM (24) NOTE 7 OIL AND GAS INFORM (25) NOTE 7 OIL AND GAS INFORM (26)!19 PAGE 506 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (8)Beneficial Ownership (8)PARKER PARSLEY 86B LTD (1)INDEX TO EXHIBITS (8)SELECTED FINANCIAL DATA (13) SUPPLEMENTAL INFORMATION (14) ITEM 6 SELECTED FINANCIAL (9)!7 PAGE 525 ITEM 8 FINANCIAL STABalance Sheet (14)Income Statement (15) STATEMENTS OF PARTNERS CA (14)Cash Flows (15)NOTE 4 INCOME TAXES (9)! NOTE 5 OIL AND GAS PRODUC (28)! NOTE 5 OIL AND GAS PRODUC (29)! 16 PAGE 534 NOTE 6 RELATED PAR! 16 PAGE 534 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (27) NOTE 7 OIL AND GAS INFORM (28) NOTE 7 OIL AND GAS INFORM (29)!18 PAGE 536 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (9)Beneficial Ownership (9)PARKER PARSLEY 86C LTDSELECTED FINANCIAL DATA (14) SUPPLEMENTAL INFORMATION (15)Balance Sheet (15)Income Statement (16) STATEMENTS OF PARTNERS CA (15)Cash Flows (16) 8 PAGE 556 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (30)! NOTE 5 OIL AND GAS PRODUC (31)! NOTE 6 RELATED PARTY TRANS (6)! NOTE 6 RELATED PARTY TRANS (7) NOTE 7 OIL AND GAS INFORM (30) NOTE 7 OIL AND GAS INFORM (31) NOTE 7 OIL AND GAS INFORM (32)! 11 PAGE 559 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (15) SUPPLEMENTAL INFORMATION (16)Balance Sheet (16)Income Statement (17) STATEMENTS OF PARTNERS CA (16)Cash Flows (17)NOTE 4 INCOME TAXES (10)! NOTE 5 OIL AND GAS PRODUC (32)! NOTE 5 OIL AND GAS PRODUC (33)! 9 PAGE 576 NOTE 6 RELATED PART! 9 PAGE 576 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (33) NOTE 7 OIL AND GAS INFORM (34) NOTE 7 OIL AND GAS INFORM (35)!11 PAGE 578 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (16) SUPPLEMENTAL INFORMATION (17) ITEM 6 SELECTED FINANCIAL (10)!8 PAGE 594 ITEM 8 FINANCIAL STABalance Sheet (17)Income Statement (18) STATEMENTS OF PARTNERS CA (17)Cash Flows (18)NOTE 4 INCOME TAXES (11)! NOTE 5 OIL AND GAS PRODUC (34)! NOTE 5 OIL AND GAS PRODUC (35)! 17 PAGE 603 NOTE 6 RELATED PAR! 17 PAGE 603 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (36) NOTE 7 OIL AND GAS INFORM (37) NOTE 7 OIL AND GAS INFORM (38)! 19 PAGE 605 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (10)Beneficial Ownership (10)PARKER PARSLEY 87A LTDSELECTED FINANCIAL DATA (17) SUPPLEMENTAL INFORMATION (18)Balance Sheet (18)Income Statement (19) STATEMENTS OF PARTNERS CA (18)Cash Flows (19) 8 PAGE 625 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (36)! NOTE 5 OIL AND GAS PRODUC (37)! 9 PAGE 626 NOTE 6 RELATED PART! 9 PAGE 626 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (39) NOTE 7 OIL AND GAS INFORM (40) NOTE 7 OIL AND GAS INFORM (41)! 11 PAGE 628 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (18) SUPPLEMENTAL INFORMATION (19) ITEM 6 SELECTED FINANCIAL (11)INDEX TO FINANCIAL STATEM (8)Balance Sheet (19)Income Statement (20) STATEMENTS OF PARTNERS CA (19)Cash Flows (20)NOTE 4 INCOME TAXES (12)! NOTE 5 OIL AND GAS PRODUC (38)! NOTE 5 OIL AND GAS PRODUC (39)! 17 PAGE 653 NOTE 6 RELATED PAR! 17 PAGE 653 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (42) NOTE 7 OIL AND GAS INFORM (43) NOTE 7 OIL AND GAS INFORM (44)! 19 PAGE 655 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (11)Beneficial Ownership (11)PARKER PARSLEY 87B LTDINDEX TO EXHIBITS (9)SELECTED FINANCIAL DATA (19) SUPPLEMENTAL INFORMATION (20) ITEM 6 SELECTED FINANCIAL (12)INDEX TO FINANCIAL STATEM (9)Balance Sheet (20)Income Statement (21) STATEMENTS OF PARTNERS CA (20)Cash Flows (21)!16 PAGE 683 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (40)! NOTE 5 OIL AND GAS PRODUC (41)! NOTE 6 RELATED PARTY TRANS (8)! NOTE 6 RELATED PARTY TRANS (9) NOTE 7 OIL AND GAS INFORM (45) NOTE 7 OIL AND GAS INFORM (46) NOTE 7 OIL AND GAS INFORM (47)!19 PAGE 686 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (12)Beneficial Ownership (12)PROPERTIES 87A LTDINDEX TO EXHIBITS (10)SELECTED FINANCIAL DATA (20) SUPPLEMENTAL INFORMATION (21) ITEM 6 SELECTED FINANCIAL (13)INDEX TO FINANCIAL STATE (10)Balance Sheet (21)Income Statement (22) STATEMENTS OF PARTNERS CA (21)Cash Flows (22)!16 PAGE 714 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (42)! NOTE 5 OIL AND GAS PRODUC (43)! 17 PAGE 715 NOTE 6 RELATED PAR! 17 PAGE 715 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (48) NOTE 7 OIL AND GAS INFORM (49) NOTE 7 OIL AND GAS INFORM (50)! 19 PAGE 717 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (13)Beneficial Ownership (13)PROPERTIES 87B LTDINDEX TO EXHIBITS (11)SELECTED FINANCIAL DATA (21) SUPPLEMENTAL INFORMATION (22)Balance Sheet (22)Income Statement (23) STATEMENTS OF PARTNERS CA (22)Cash Flows (23) 8 PAGE 737 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (44)! NOTE 5 OIL AND GAS PRODUC (45)! 9 PAGE 738 NOTE 6 RELATED PART! 9 PAGE 738 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (51) NOTE 7 OIL AND GAS INFORM (52) NOTE 7 OIL AND GAS INFORM (53)! 11 PAGE 740 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (22) SUPPLEMENTAL INFORMATION (23)Balance Sheet (23)Income Statement (24) STATEMENTS OF PARTNERS CA (23)Cash Flows (24) 8 PAGE 756 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (46)! NOTE 5 OIL AND GAS PRODUC (47)! 9 PAGE 757 NOTE 6 RELATED PART! 9 PAGE 757 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (54) NOTE 7 OIL AND GAS INFORM (55) NOTE 7 OIL AND GAS INFORM (56)! 11 PAGE 759 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (23)!31 2000 1 PAGE 766 PARKER PARSLPARKER PARSLEY 88A LP ITEM 6 SELECTED FINANCIAL (14)INDEX TO FINANCIAL STATE (11)Balance Sheet (24)Income Statement (25) STATEMENTS OF PARTNERS CA (24)Cash Flows (25)NOTE 4 INCOME TAXES (13)! NOTE 5 OIL AND GAS PRODUC (48)! NOTE 5 OIL AND GAS PRODUC (49)! 16 PAGE 783 NOTE 6 RELATED PAR! 16 PAGE 783 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (57) NOTE 7 OIL AND GAS INFORM (58) NOTE 7 OIL AND GAS INFORM (59)! 18 PAGE 785 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (14)Beneficial Ownership (14)PARKER PARSLEY 88A LP (1)INDEX TO EXHIBITS (12)SELECTED FINANCIAL DATA (24) SUPPLEMENTAL INFORMATION (24)Balance Sheet (25)Income Statement (26) STATEMENTS OF PARTNERS CA (25)Cash Flows (26) 8 PAGE 805 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (50)! NOTE 5 OIL AND GAS PRODUC (51)! 9 PAGE 806 NOTE 6 RELATED PART! 9 PAGE 806 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (60) NOTE 7 OIL AND GAS INFORM (61) NOTE 7 OIL AND GAS INFORM (62)! 11 PAGE 808 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (25)!31 2000 1 PAGE 815 PARKER PARSLPARKER PARSLEY 88B LP ITEM 6 SELECTED FINANCIAL (15)INDEX TO FINANCIAL STATE (12)Balance Sheet (26)Income Statement (27) STATEMENTS OF PARTNERS CA (26)Cash Flows (27)!16 PAGE 832 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (52)! NOTE 5 OIL AND GAS PRODUC (53)! 17 PAGE 833 NOTE 6 RELATED PAR! 17 PAGE 833 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (63) NOTE 7 OIL AND GAS INFORM (64) NOTE 7 OIL AND GAS INFORM (65)! 19 PAGE 835 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (15)Beneficial Ownership (15)PARKER PARSLEY 88B LP (1)INDEX TO EXHIBITS (13)SELECTED FINANCIAL DATA (26) SUPPLEMENTAL INFORMATION (25)Balance Sheet (27)Income Statement (28) STATEMENTS OF PARTNERS CA (27)Cash Flows (28) 8 PAGE 855 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (54)! NOTE 5 OIL AND GAS PRODUC (55)! 9 PAGE 856 NOTE 6 RELATED PART! 9 PAGE 856 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (66) NOTE 7 OIL AND GAS INFORM (67) NOTE 7 OIL AND GAS INFORM (68)! 11 PAGE 858 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (27)!31 2000 1 PAGE 865 PARKER PARSLBalance Sheet (28)Income Statement (29) STATEMENTS OF PARTNERS CA (28)Cash Flows (29) 8 PAGE 874 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (56)! NOTE 5 OIL AND GAS PRODUC (57)! 9 PAGE 875 NOTE 6 RELATED PART! 9 PAGE 875 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (69) NOTE 7 OIL AND GAS INFORM (70) NOTE 7 OIL AND GAS INFORM (71)! 11 PAGE 877 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (28) SUPPLEMENTAL INFORMATION (26)!PARKER PARSLEY PRODUCING PROPER ITEM 6 SELECTED FINANCIAL (16)INDEX TO FINANCIAL STATE (13)Balance Sheet (29)Income Statement (30) STATEMENTS OF PARTNERS CA (29)Cash Flows (30)NOTE 4 INCOME TAXES (14)! NOTE 5 OIL AND GAS PRODUC (58)! NOTE 5 OIL AND GAS PRODUC (59)! 16 PAGE 901 NOTE 6 RELATED PAR! 16 PAGE 901 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (72) NOTE 7 OIL AND GAS INFORM (73)!18 PAGE 903 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (16)Beneficial Ownership (16)PROPERTIES 88A LPINDEX TO EXHIBITS (14)SELECTED FINANCIAL DATA (29) SUPPLEMENTAL INFORMATION (27)Balance Sheet (30)Income Statement (31) STATEMENTS OF PARTNERS CA (30)Cash Flows (31)NOTE 4 INCOME TAXES (15)! NOTE 5 OIL AND GAS PRODUC (60)! NOTE 5 OIL AND GAS PRODUC (61)! 9 PAGE 924 NOTE 6 RELATED PART! 9 PAGE 924 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (74) NOTE 7 OIL AND GAS INFORM (75) NOTE 7 OIL AND GAS INFORM (76)! 11 PAGE 926 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (30) SUPPLEMENTAL INFORMATION (28)Balance Sheet (31)Income Statement (32) STATEMENTS OF PARTNERS CA (31)Cash Flows (32)NOTE 4 INCOME TAXES (16)! NOTE 5 OIL AND GAS PRODUC (62)! NOTE 5 OIL AND GAS PRODUC (63)! 9 PAGE 943 NOTE 6 RELATED PART! 9 PAGE 943 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (77) NOTE 7 OIL AND GAS INFORM (78) NOTE 7 OIL AND GAS INFORM (79)!11 PAGE 945 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (31)!31 2000 1 PAGE 952 PARKER PARSLPARKER PARSLEY 89A LP ITEM 6 SELECTED FINANCIAL (17)INDEX TO FINANCIAL STATE (14)Balance Sheet (32)Income Statement (33) STATEMENTS OF PARTNERS CA (32)Cash Flows (33)NOTE 4 INCOME TAXES (17)! NOTE 5 OIL AND GAS PRODUC (64)! NOTE 5 OIL AND GAS PRODUC (65)! 16 PAGE 969 NOTE 6 RELATED PAR! 16 PAGE 969 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (80) NOTE 7 OIL AND GAS INFORM (81) NOTE 7 OIL AND GAS INFORM (82) NOTE 7 OIL AND GAS INFORM (83)! 18 PAGE 971 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (17)Beneficial Ownership (17)PARKER PARSLEY 89A LP (1)INDEX TO EXHIBITS (15)SELECTED FINANCIAL DATA (32) SUPPLEMENTAL INFORMATION (29)Balance Sheet (33)Income Statement (34) STATEMENTS OF PARTNERS CA (33)Cash Flows (34) 8 PAGE 991 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (66)! NOTE 5 OIL AND GAS PRODUC (67)! 9 PAGE 992 NOTE 6 RELATED PART! 9 PAGE 992 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (84) NOTE 7 OIL AND GAS INFORM (85) NOTE 7 OIL AND GAS INFORM (86)! 11 PAGE 994 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (33)!31 2000 1 PAGE 1001 PARKER PARSBalance Sheet (34)Income Statement (35) STATEMENTS OF PARTNERS CA (34)Cash Flows (35)!8 PAGE 1010 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (68)! NOTE 5 OIL AND GAS PRODUC (69)! 9 PAGE 1011 NOTE 6 RELATED PAR! 9 PAGE 1011 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (87) NOTE 7 OIL AND GAS INFORM (88) NOTE 7 OIL AND GAS INFORM (89)!11 PAGE 1013 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (34) SUPPLEMENTAL INFORMATION (30)Balance Sheet (35)Income Statement (36) STATEMENTS OF PARTNERS CA (35)Cash Flows (36)!8 PAGE 1029 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (70)! NOTE 5 OIL AND GAS PRODUC (71)! 9 PAGE 1030 NOTE 6 RELATED PAR! 9 PAGE 1030 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (90) NOTE 7 OIL AND GAS INFORM (91) NOTE 7 OIL AND GAS INFORM (92)! 11 PAGE 1032 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (35) SUPPLEMENTAL INFORMATION (31)Balance Sheet (36)Income Statement (37) STATEMENTS OF PARTNERS CA (36)Cash Flows (37)!8 PAGE 1048 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (72)! NOTE 5 OIL AND GAS PRODUC (73)! 9 PAGE 1049 NOTE 6 RELATED PAR! 9 PAGE 1049 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (93) NOTE 7 OIL AND GAS INFORM (94) NOTE 7 OIL AND GAS INFORM (95)! 11 PAGE 1051 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (36)!31 2000 1 PAGE 1058 PARKER PARSPARKER PARSLEY 90A LP ITEM 6 SELECTED FINANCIAL (18)INDEX TO FINANCIAL STATE (15)Balance Sheet (37)Income Statement (38) STATEMENTS OF PARTNERS CA (37)Cash Flows (38)!15 PAGE 1074 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (74)! NOTE 5 OIL AND GAS PRODUC (75)! NOTE 6 RELATED PARTY TRAN (10)! NOTE 6 RELATED PARTY TRAN (11) NOTE 7 OIL AND GAS INFORM (96) NOTE 7 OIL AND GAS INFORM (97)! 18 PAGE 1077 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (18)Beneficial Ownership (18)PARKER PARSLEY 90A LP (1)INDEX TO EXHIBITS (16)SELECTED FINANCIAL DATA (37) SUPPLEMENTAL INFORMATION (32)PARKER PARSLEY 90B CONV LP ITEM 6 SELECTED FINANCIAL (19)INDEX TO FINANCIAL STATE (16)Balance Sheet (38)Income Statement (39) STATEMENTS OF PARTNERS CA (38)Cash Flows (39)!16 PAGE 1105 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (76)! NOTE 5 OIL AND GAS PRODUC (77)! NOTE 6 RELATED PARTY TRAN (12)! NOTE 6 RELATED PARTY TRAN (13) NOTE 7 OIL AND GAS INFORM (98) NOTE 7 OIL AND GAS INFORM (99) NOTE 7 OIL AND GAS INFOR (100)! 19 PAGE 1108 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (19)Beneficial Ownership (19) PARKER PARSLEY 90B CONV LP (1)INDEX TO EXHIBITS (17)SELECTED FINANCIAL DATA (38)!31 2000 1 PAGE 1119 PARKER PARSPARKER PARSLEY 90B LP ITEM 6 SELECTED FINANCIAL (20)INDEX TO FINANCIAL STATE (17)Balance Sheet (39)Income Statement (40) STATEMENTS OF PARTNERS CA (39)Cash Flows (40)!16 PAGE 1136 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (78)! NOTE 5 OIL AND GAS PRODUC (79)! NOTE 6 RELATED PARTY TRAN (14)! NOTE 6 RELATED PARTY TRAN (15) NOTE 7 OIL AND GAS INFOR (101) NOTE 7 OIL AND GAS INFOR (102) NOTE 7 OIL AND GAS INFOR (103)! 19 PAGE 1139 NOTE 8 MAJOR CUS!ITEM 10 DIRECTORS AND EXEC (20)Beneficial Ownership (20)PARKER PARSLEY 90B LP (1)INDEX TO EXHIBITS (18)SELECTED FINANCIAL DATA (39) SUPPLEMENTAL INFORMATION (33)PARKER PARSLEY 90C CONV LP ITEM 6 SELECTED FINANCIAL (21)INDEX TO FINANCIAL STATE (18)Balance Sheet (40)Income Statement (41) STATEMENTS OF PARTNERS CA (40)Cash Flows (41)!15 PAGE 1166 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (80)! NOTE 5 OIL AND GAS PRODUC (81)! NOTE 6 RELATED PARTY TRAN (16)! NOTE 6 RELATED PARTY TRAN (17) NOTE 7 OIL AND GAS INFOR (104) NOTE 7 OIL AND GAS INFOR (105) NOTE 7 OIL AND GAS INFOR (106)! 18 PAGE 1169 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (21)Beneficial Ownership (21) PARKER PARSLEY 90C CONV LP (1)INDEX TO EXHIBITS (19)SELECTED FINANCIAL DATA (40)!31 2000 1 PAGE 1180 PARKER PARSPARKER PARSLEY 90C LP ITEM 6 SELECTED FINANCIAL (22)INDEX TO FINANCIAL STATE (19)Balance Sheet (41)Income Statement (42) STATEMENTS OF PARTNERS CA (41)Cash Flows (42)!15 PAGE 1196 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (82)! NOTE 5 OIL AND GAS PRODUC (83)! NOTE 6 RELATED PARTY TRAN (18)! NOTE 6 RELATED PARTY TRAN (19) NOTE 7 OIL AND GAS INFOR (107) NOTE 7 OIL AND GAS INFOR (108) NOTE 7 OIL AND GAS INFOR (109)! 18 PAGE 1199 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (22)Beneficial Ownership (22)PARKER PARSLEY 90C LP (1)INDEX TO EXHIBITS (20)SELECTED FINANCIAL DATA (41) SUPPLEMENTAL INFORMATION (34)Balance Sheet (42)Income Statement (43) STATEMENTS OF PARTNERS CA (42)Cash Flows (43)!8 PAGE 1219 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (84)! NOTE 5 OIL AND GAS PRODUC (85)! 9 PAGE 1220 NOTE 6 RELATED PAR! 9 PAGE 1220 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (110) NOTE 7 OIL AND GAS INFOR (111) NOTE 7 OIL AND GAS INFOR (112)! 11 PAGE 1222 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (42) SUPPLEMENTAL INFORMATION (35)Balance Sheet (43)Income Statement (44) STATEMENTS OF PARTNERS CA (43)Cash Flows (44)!8 PAGE 1238 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (86)! NOTE 5 OIL AND GAS PRODUC (87)! 9 PAGE 1239 NOTE 6 RELATED PAR! 9 PAGE 1239 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (113) NOTE 7 OIL AND GAS INFOR (114) NOTE 7 OIL AND GAS INFOR (115)! 11 PAGE 1241 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (43)!31 2000 1 PAGE 1248 PARKER PARSPARKER PARSLEY 91A LP ITEM 6 SELECTED FINANCIAL (23)INDEX TO FINANCIAL STATE (20)Balance Sheet (44)Income Statement (45) STATEMENTS OF PARTNERS CA (44)Cash Flows (45)!15 PAGE 1264 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (88)! NOTE 5 OIL AND GAS PRODUC (89)! NOTE 6 RELATED PARTY TRAN (20)! NOTE 6 RELATED PARTY TRAN (21) NOTE 7 OIL AND GAS INFOR (116) NOTE 7 OIL AND GAS INFOR (117) NOTE 7 OIL AND GAS INFOR (118)! 18 PAGE 1267 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (23)Beneficial Ownership (23)PARKER PARSLEY 91A LP (1)INDEX TO EXHIBITS (21)SELECTED FINANCIAL DATA (44)!31 2000 1 PAGE 1278 PARKER PARSPARKER PARSLEY 91B LP ITEM 6 SELECTED FINANCIAL (24)INDEX TO FINANCIAL STATE (21)Balance Sheet (45)Income Statement (46) STATEMENTS OF PARTNERS CA (45)Cash Flows (46)!15 PAGE 1294 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (90)! NOTE 5 OIL AND GAS PRODUC (91)! NOTE 6 RELATED PARTY TRAN (22)! NOTE 6 RELATED PARTY TRAN (23) NOTE 7 OIL AND GAS INFOR (119) NOTE 7 OIL AND GAS INFOR (120) NOTE 7 OIL AND GAS INFOR (121)! 18 PAGE 1297 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (24)Beneficial Ownership (24)PARKER PARSLEY 91B LP (1)INDEX TO EXHIBITS (22)SELECTED FINANCIAL DATA (45)POWER OF ATTORNEYPOWER OF ATTORNEY (1)POWER OF ATTORNEY (2)POWER OF ATTORNEY (3)POWER OF ATTORNEY (4)POWER OF ATTORNEY (5)POWER OF ATTORNEY (6)POWER OF ATTORNEY (7)!2001 THE BOARD OF DIRECTORS REC!2001 THE BOARD OF DIRECTORS (1)!2001 THE BOARD OF DIRECTORS (2)PAGE 2U } a} <}      $PIONEER NATURAL RESOURCES CO S-4 04/17/2001*"-5- 15 NYMEX FUTURES PRICES DATE  OILS ($/Bbl) GAS ($/Mcf)(1)    Apr - Dec 2001Q+:@Q@~ J\(\8@q= ףp@~ NGz6@p= ף@~ R(\O6@\(\@~ VQ5@{Gz@ ThereafterQ5@{Gz@$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/4ymaUIo= Y=PF0*8X> @ l  GG)J+ dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/?? SECURITIES AND EXC!CALCULATION OF REGISTRATION FEETO BE HELD ON 2001TABLE OF CONTENTSPAGE 7 LIST OF APPENDICES!LIMITED PARTNER INVESTMENT REPA!LIMITED PARTNER INVESTMENT (1) 5 PAGE 15 NYMEX FUTURES PRICESIncome StatementIncome Statement (1)AT DECEMBER 31 2000!15 PAGE 25 COMPARATIVE PER SHAR!25 PAGE 35 REASONS FOR THE MERGFAIRNESS OPINIONFAIRNESS OPINION (1)!LEGAL OPINION FOR LIMITED PARTN!LEGAL OPINION FOR LIMITED P (1)!NONMANAGING GENERAL PARTNERS OF!49 PAGE 59 PAYMENT OF EXPENSES !58 PAGE 68 COMPARATIVE PER SHAR!60 PAGE 70 OWNERSHIP OF PARTNER PIONEER PIONEER USATHE DRILLING PARTNERSHIPSTHE DRILLING PARTNERSHIPS (1)THE INCOME PARTNERSHIPS INTERESTSINTERESTS (1)INTERESTS (2)INTERESTS (3)INTERESTS (4)INTERESTS (5)!WHERE YOU CAN FIND MORE INFORMAAS OF DECEMBER 31 2000YEAR ENDED DECEMBER 31 2000!QUANTITIES OF OIL AND GAS RESER!STANDARDIZED MEASURE OF DISCOUN CASH FLOWSAS OF MARCH 31 2001AS OF MARCH 31 2001 (1)AS OF MARCH 31 2001 (2)AS OF MARCH 31 2001 (3)AS OF MARCH 31 2001 (4)AS OF MARCH 31 2001 (5)!FROM INCEPTION THROUGH MARCH 31!ANNUAL REPURCHASE PRICES AND AGOF EACH PARTNERSHIP!FOR THE THREE MONTHS ENDED MARCAS OF DECEMBER 31 2000 (1)AS OF MARCH 31 2001 (6)!THE YEARS ENDED DECEMBER 31 200AS OF DECEMBER 31 2000 (2)DECEMBER 31 2000 AND 1999EFFECTIVE DECEMBER 31 2000 EFFECTIVE DECEMBER 31 2000 (1) RECITALS RECITALS (1) SUPPLEMENTAL INFORMATION TABLEBalance SheetIncome Statement (2) STATEMENTS OF PARTNERS CAPITALCash Flows (1)NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCING A! NOTE 5 OIL AND GAS PRODUCI (1)! NOTE 6 RELATED PARTY TRANSACTI! NOTE 6 RELATED PARTY TRANS (1)! NOTE 7 OIL AND GAS INFORMATION! NOTE 7 OIL AND GAS INFORMA (1)! NOTE 7 OIL AND GAS INFORMA (2)!11 PAGE 163 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA SUPPLEMENTAL INFORMATION T (1)Balance Sheet (1)Income Statement (3) STATEMENTS OF PARTNERS CAP (1)Cash Flows (2)NOTE 4 INCOME TAXES (1)! NOTE 5 OIL AND GAS PRODUCI (2)! NOTE 5 OIL AND GAS PRODUCI (3)! 9 PAGE 180 NOTE 6 RELATED PAR! 9 PAGE 180 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORMA (3)! NOTE 7 OIL AND GAS INFORMA (4)! NOTE 7 OIL AND GAS INFORMA (5)!11 PAGE 182 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (1) SUPPLEMENTAL INFORMATION T (2) ITEM 6 SELECTED FINANCIAL DATAINDEX TO FINANCIAL STATEMENTSBalance Sheet (2)Income Statement (4) STATEMENTS OF PARTNERS CAP (2)Cash Flows (3)!15 PAGE 205 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCI (4)! NOTE 5 OIL AND GAS PRODUCI (5)! NOTE 6 RELATED PARTY TRANS (2)! NOTE 6 RELATED PARTY TRANS (3)! NOTE 7 OIL AND GAS INFORMA (6)! NOTE 7 OIL AND GAS INFORMA (7)! NOTE 7 OIL AND GAS INFORMA (8)! NOTE 7 OIL AND GAS INFORMA (9)! NOTE 7 OIL AND GAS INFORM (10)! 18 PAGE 208 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECUTIVEBeneficial OwnershipPARKER PARSLEY 82I LTDINDEX TO EXHIBITSSELECTED FINANCIAL DATA (2) SUPPLEMENTAL INFORMATION T (3) ITEM 6 SELECTED FINANCIAL (1)INDEX TO FINANCIAL STATEM (1)Balance Sheet (3)Income Statement (5) STATEMENTS OF PARTNERS CAP (3)Cash Flows (4)NOTE 4 INCOME TAXES (2)! NOTE 5 OIL AND GAS PRODUCI (6)! NOTE 5 OIL AND GAS PRODUCI (7)! 16 PAGE 236 NOTE 6 RELATED PAR! 16 PAGE 236 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (11)! NOTE 7 OIL AND GAS INFORM (12)! NOTE 7 OIL AND GAS INFORM (13)!18 PAGE 238 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (1)Beneficial Ownership (1)PARKER PARSLEY 82II LTDINDEX TO EXHIBITS (1)SELECTED FINANCIAL DATA (3) SUPPLEMENTAL INFORMATION T (4)Balance Sheet (4)Income Statement (6) STATEMENTS OF PARTNERS CAP (4)Cash Flows (5)NOTE 4 INCOME TAXES (3)! NOTE 5 OIL AND GAS PRODUCI (8)! NOTE 5 OIL AND GAS PRODUCI (9)! 9 PAGE 259 NOTE 6 RELATED PART! 9 PAGE 259 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (14)! NOTE 7 OIL AND GAS INFORM (15)! NOTE 7 OIL AND GAS INFORM (16)!11 PAGE 261 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (4) SUPPLEMENTAL INFORMATION T (5)PARKER PARSLEY 83A LTD ITEM 6 SELECTED FINANCIAL (2)INDEX TO FINANCIAL STATEM (2)Balance Sheet (5)Income Statement (7) STATEMENTS OF PARTNERS CAP (5)Cash Flows (6)NOTE 4 INCOME TAXES (4)! NOTE 5 OIL AND GAS PRODUC (10)! NOTE 5 OIL AND GAS PRODUC (11)! 16 PAGE 285 NOTE 6 RELATED PAR! 16 PAGE 285 NOTE 6 RELATED (1)!NOTE 7 OIL AND GAS INFORMATION  NOTE 7 OIL AND GAS INFORMA (1) NOTE 7 OIL AND GAS INFORMA (2)! 18 PAGE 287 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECU (2)Beneficial Ownership (2)PARKER PARSLEY 83A LTD (1)INDEX TO EXHIBITS (2)SELECTED FINANCIAL DATA (5) SUPPLEMENTAL INFORMATION T (6)PARKER PARSLEY 83B LTD ITEM 6 SELECTED FINANCIAL (3)INDEX TO FINANCIAL STATEM (3)Balance Sheet (6)Income Statement (8) STATEMENTS OF PARTNERS CAP (6)Cash Flows (7)NOTE 4 INCOME TAXES (5)! NOTE 5 OIL AND GAS PRODUC (12)! NOTE 5 OIL AND GAS PRODUC (13)! 16 PAGE 315 NOTE 6 RELATED PAR! 16 PAGE 315 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (3) NOTE 7 OIL AND GAS INFORMA (4) NOTE 7 OIL AND GAS INFORMA (5)!18 PAGE 317 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (3)Beneficial Ownership (3)PARKER PARSLEY 83B LTD (1)INDEX TO EXHIBITS (3)SELECTED FINANCIAL DATA (6) SUPPLEMENTAL INFORMATION T (7)PARKER PARSLEY 84A LTD ITEM 6 SELECTED FINANCIAL (4)INDEX TO FINANCIAL STATEM (4)Balance Sheet (7)Income Statement (9) STATEMENTS OF PARTNERS CAP (7)Cash Flows (8)!15 PAGE 344 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (14)! NOTE 5 OIL AND GAS PRODUC (15)! 16 PAGE 345 NOTE 6 RELATED PAR! 16 PAGE 345 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (6) NOTE 7 OIL AND GAS INFORMA (7) NOTE 7 OIL AND GAS INFORMA (8)!18 PAGE 347 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (4)Beneficial Ownership (4)PARKER PARSLEY 84A LTD (1)INDEX TO EXHIBITS (4)SELECTED FINANCIAL DATA (7) SUPPLEMENTAL INFORMATION T (8)PARKER PARSLEY 85A LTD ITEM 6 SELECTED FINANCIAL (5)INDEX TO FINANCIAL STATEM (5)Balance Sheet (8)Income Statement (10) STATEMENTS OF PARTNERS CAP (8)Cash Flows (9)NOTE 4 INCOME TAXES (6)! NOTE 5 OIL AND GAS PRODUC (16)! NOTE 5 OIL AND GAS PRODUC (17)! 16 PAGE 375 NOTE 6 RELATED PAR! 16 PAGE 375 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (9) NOTE 7 OIL AND GAS INFORM (10) NOTE 7 OIL AND GAS INFORM (11)!18 PAGE 377 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (5)Beneficial Ownership (5)PARKER PARSLEY 85A LTD (1)INDEX TO EXHIBITS (5)SELECTED FINANCIAL DATA (8) SUPPLEMENTAL INFORMATION T (9)PARKER PARSLEY 85B LTD ITEM 6 SELECTED FINANCIAL (6)!7 PAGE 396 ITEM 8 FINANCIAL STABalance Sheet (9) STATEMENTS OF PARTNERS CAP (9)Cash Flows (10)!15 PAGE 404 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (18)! NOTE 5 OIL AND GAS PRODUC (19)! 16 PAGE 405 NOTE 6 RELATED PAR! 16 PAGE 405 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (12) NOTE 7 OIL AND GAS INFORM (13) NOTE 7 OIL AND GAS INFORM (14)!18 PAGE 407 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (6)Beneficial Ownership (6)PARKER PARSLEY 85B LTD (1)INDEX TO EXHIBITS (6)SELECTED FINANCIAL DATA (9) SUPPLEMENTAL INFORMATION (10)Balance Sheet (10)Income Statement (11) STATEMENTS OF PARTNERS CA (10)Cash Flows (11)NOTE 4 INCOME TAXES (7)! NOTE 5 OIL AND GAS PRODUC (20)! NOTE 5 OIL AND GAS PRODUC (21)! 9 PAGE 428 NOTE 6 RELATED PART! 9 PAGE 428 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (15) NOTE 7 OIL AND GAS INFORM (16) NOTE 7 OIL AND GAS INFORM (17)! 11 PAGE 430 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (10) SUPPLEMENTAL INFORMATION (11)Balance Sheet (11)Income Statement (12) STATEMENTS OF PARTNERS CA (11)Cash Flows (12) 8 PAGE 446 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (22)! NOTE 5 OIL AND GAS PRODUC (23)! 9 PAGE 447 NOTE 6 RELATED PART! 9 PAGE 447 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (18) NOTE 7 OIL AND GAS INFORM (19) NOTE 7 OIL AND GAS INFORM (20)! 11 PAGE 449 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (11) SUPPLEMENTAL INFORMATION (12)PARKER PARSLEY 86A LTD ITEM 6 SELECTED FINANCIAL (7)INDEX TO FINANCIAL STATEM (6)Balance Sheet (12)Income Statement (13) STATEMENTS OF PARTNERS CA (12)Cash Flows (13)NOTE 4 INCOME TAXES (8)! NOTE 5 OIL AND GAS PRODUC (24)! NOTE 5 OIL AND GAS PRODUC (25)! 16 PAGE 473 NOTE 6 RELATED PAR! 16 PAGE 473 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (21) NOTE 7 OIL AND GAS INFORM (22) NOTE 7 OIL AND GAS INFORM (23)!18 PAGE 475 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (7)Beneficial Ownership (7)PARKER PARSLEY 86A LTD (1)INDEX TO EXHIBITS (7)SELECTED FINANCIAL DATA (12) SUPPLEMENTAL INFORMATION (13)PARKER PARSLEY 86B LTD ITEM 6 SELECTED FINANCIAL (8)INDEX TO FINANCIAL STATEM (7)Balance Sheet (13)Income Statement (14) STATEMENTS OF PARTNERS CA (13)Cash Flows (14)!16 PAGE 503 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (26)! NOTE 5 OIL AND GAS PRODUC (27)! NOTE 6 RELATED PARTY TRANS (4)! NOTE 6 RELATED PARTY TRANS (5) NOTE 7 OIL AND GAS INFORM (24) NOTE 7 OIL AND GAS INFORM (25) NOTE 7 OIL AND GAS INFORM (26)!19 PAGE 506 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (8)Beneficial Ownership (8)PARKER PARSLEY 86B LTD (1)INDEX TO EXHIBITS (8)SELECTED FINANCIAL DATA (13) SUPPLEMENTAL INFORMATION (14) ITEM 6 SELECTED FINANCIAL (9)!7 PAGE 525 ITEM 8 FINANCIAL STABalance Sheet (14)Income Statement (15) STATEMENTS OF PARTNERS CA (14)Cash Flows (15)NOTE 4 INCOME TAXES (9)! NOTE 5 OIL AND GAS PRODUC (28)! NOTE 5 OIL AND GAS PRODUC (29)! 16 PAGE 534 NOTE 6 RELATED PAR! 16 PAGE 534 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (27) NOTE 7 OIL AND GAS INFORM (28) NOTE 7 OIL AND GAS INFORM (29)!18 PAGE 536 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (9)Beneficial Ownership (9)PARKER PARSLEY 86C LTDSELECTED FINANCIAL DATA (14) SUPPLEMENTAL INFORMATION (15)Balance Sheet (15)Income Statement (16) STATEMENTS OF PARTNERS CA (15)Cash Flows (16) 8 PAGE 556 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (30)! NOTE 5 OIL AND GAS PRODUC (31)! NOTE 6 RELATED PARTY TRANS (6)! NOTE 6 RELATED PARTY TRANS (7) NOTE 7 OIL AND GAS INFORM (30) NOTE 7 OIL AND GAS INFORM (31) NOTE 7 OIL AND GAS INFORM (32)! 11 PAGE 559 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (15) SUPPLEMENTAL INFORMATION (16)Balance Sheet (16)Income Statement (17) STATEMENTS OF PARTNERS CA (16)Cash Flows (17)NOTE 4 INCOME TAXES (10)! NOTE 5 OIL AND GAS PRODUC (32)! NOTE 5 OIL AND GAS PRODUC (33)! 9 PAGE 576 NOTE 6 RELATED PART! 9 PAGE 576 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (33) NOTE 7 OIL AND GAS INFORM (34) NOTE 7 OIL AND GAS INFORM (35)!11 PAGE 578 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (16) SUPPLEMENTAL INFORMATION (17) ITEM 6 SELECTED FINANCIAL (10)!8 PAGE 594 ITEM 8 FINANCIAL STABalance Sheet (17)Income Statement (18) STATEMENTS OF PARTNERS CA (17)Cash Flows (18)NOTE 4 INCOME TAXES (11)! NOTE 5 OIL AND GAS PRODUC (34)! NOTE 5 OIL AND GAS PRODUC (35)! 17 PAGE 603 NOTE 6 RELATED PAR! 17 PAGE 603 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (36) NOTE 7 OIL AND GAS INFORM (37) NOTE 7 OIL AND GAS INFORM (38)! 19 PAGE 605 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (10)Beneficial Ownership (10)PARKER PARSLEY 87A LTDSELECTED FINANCIAL DATA (17) SUPPLEMENTAL INFORMATION (18)Balance Sheet (18)Income Statement (19) STATEMENTS OF PARTNERS CA (18)Cash Flows (19) 8 PAGE 625 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (36)! NOTE 5 OIL AND GAS PRODUC (37)! 9 PAGE 626 NOTE 6 RELATED PART! 9 PAGE 626 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (39) NOTE 7 OIL AND GAS INFORM (40) NOTE 7 OIL AND GAS INFORM (41)! 11 PAGE 628 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (18) SUPPLEMENTAL INFORMATION (19) ITEM 6 SELECTED FINANCIAL (11)INDEX TO FINANCIAL STATEM (8)Balance Sheet (19)Income Statement (20) STATEMENTS OF PARTNERS CA (19)Cash Flows (20)NOTE 4 INCOME TAXES (12)! NOTE 5 OIL AND GAS PRODUC (38)! NOTE 5 OIL AND GAS PRODUC (39)! 17 PAGE 653 NOTE 6 RELATED PAR! 17 PAGE 653 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (42) NOTE 7 OIL AND GAS INFORM (43) NOTE 7 OIL AND GAS INFORM (44)! 19 PAGE 655 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (11)Beneficial Ownership (11)PARKER PARSLEY 87B LTDINDEX TO EXHIBITS (9)SELECTED FINANCIAL DATA (19) SUPPLEMENTAL INFORMATION (20) ITEM 6 SELECTED FINANCIAL (12)INDEX TO FINANCIAL STATEM (9)Balance Sheet (20)Income Statement (21) STATEMENTS OF PARTNERS CA (20)Cash Flows (21)!16 PAGE 683 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (40)! NOTE 5 OIL AND GAS PRODUC (41)! NOTE 6 RELATED PARTY TRANS (8)! NOTE 6 RELATED PARTY TRANS (9) NOTE 7 OIL AND GAS INFORM (45) NOTE 7 OIL AND GAS INFORM (46) NOTE 7 OIL AND GAS INFORM (47)!19 PAGE 686 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (12)Beneficial Ownership (12)PROPERTIES 87A LTDINDEX TO EXHIBITS (10)SELECTED FINANCIAL DATA (20) SUPPLEMENTAL INFORMATION (21) ITEM 6 SELECTED FINANCIAL (13)INDEX TO FINANCIAL STATE (10)Balance Sheet (21)Income Statement (22) STATEMENTS OF PARTNERS CA (21)Cash Flows (22)!16 PAGE 714 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (42)! NOTE 5 OIL AND GAS PRODUC (43)! 17 PAGE 715 NOTE 6 RELATED PAR! 17 PAGE 715 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (48) NOTE 7 OIL AND GAS INFORM (49) NOTE 7 OIL AND GAS INFORM (50)! 19 PAGE 717 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (13)Beneficial Ownership (13)PROPERTIES 87B LTDINDEX TO EXHIBITS (11)SELECTED FINANCIAL DATA (21) SUPPLEMENTAL INFORMATION (22)Balance Sheet (22)Income Statement (23) STATEMENTS OF PARTNERS CA (22)Cash Flows (23) 8 PAGE 737 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (44)! NOTE 5 OIL AND GAS PRODUC (45)! 9 PAGE 738 NOTE 6 RELATED PART! 9 PAGE 738 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (51) NOTE 7 OIL AND GAS INFORM (52) NOTE 7 OIL AND GAS INFORM (53)! 11 PAGE 740 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (22) SUPPLEMENTAL INFORMATION (23)Balance Sheet (23)Income Statement (24) STATEMENTS OF PARTNERS CA (23)Cash Flows (24) 8 PAGE 756 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (46)! NOTE 5 OIL AND GAS PRODUC (47)! 9 PAGE 757 NOTE 6 RELATED PART! 9 PAGE 757 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (54) NOTE 7 OIL AND GAS INFORM (55) NOTE 7 OIL AND GAS INFORM (56)! 11 PAGE 759 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (23)!31 2000 1 PAGE 766 PARKER PARSLPARKER PARSLEY 88A LP ITEM 6 SELECTED FINANCIAL (14)INDEX TO FINANCIAL STATE (11)Balance Sheet (24)Income Statement (25) STATEMENTS OF PARTNERS CA (24)Cash Flows (25)NOTE 4 INCOME TAXES (13)! NOTE 5 OIL AND GAS PRODUC (48)! NOTE 5 OIL AND GAS PRODUC (49)! 16 PAGE 783 NOTE 6 RELATED PAR! 16 PAGE 783 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (57) NOTE 7 OIL AND GAS INFORM (58) NOTE 7 OIL AND GAS INFORM (59)! 18 PAGE 785 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (14)Beneficial Ownership (14)PARKER PARSLEY 88A LP (1)INDEX TO EXHIBITS (12)SELECTED FINANCIAL DATA (24) SUPPLEMENTAL INFORMATION (24)Balance Sheet (25)Income Statement (26) STATEMENTS OF PARTNERS CA (25)Cash Flows (26) 8 PAGE 805 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (50)! NOTE 5 OIL AND GAS PRODUC (51)! 9 PAGE 806 NOTE 6 RELATED PART! 9 PAGE 806 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (60) NOTE 7 OIL AND GAS INFORM (61) NOTE 7 OIL AND GAS INFORM (62)! 11 PAGE 808 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (25)!31 2000 1 PAGE 815 PARKER PARSLPARKER PARSLEY 88B LP ITEM 6 SELECTED FINANCIAL (15)INDEX TO FINANCIAL STATE (12)Balance Sheet (26)Income Statement (27) STATEMENTS OF PARTNERS CA (26)Cash Flows (27)!16 PAGE 832 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (52)! NOTE 5 OIL AND GAS PRODUC (53)! 17 PAGE 833 NOTE 6 RELATED PAR! 17 PAGE 833 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (63) NOTE 7 OIL AND GAS INFORM (64) NOTE 7 OIL AND GAS INFORM (65)! 19 PAGE 835 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (15)Beneficial Ownership (15)PARKER PARSLEY 88B LP (1)INDEX TO EXHIBITS (13)SELECTED FINANCIAL DATA (26) SUPPLEMENTAL INFORMATION (25)Balance Sheet (27)Income Statement (28) STATEMENTS OF PARTNERS CA (27)Cash Flows (28) 8 PAGE 855 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (54)! NOTE 5 OIL AND GAS PRODUC (55)! 9 PAGE 856 NOTE 6 RELATED PART! 9 PAGE 856 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (66) NOTE 7 OIL AND GAS INFORM (67) NOTE 7 OIL AND GAS INFORM (68)! 11 PAGE 858 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (27)!31 2000 1 PAGE 865 PARKER PARSLBalance Sheet (28)Income Statement (29) STATEMENTS OF PARTNERS CA (28)Cash Flows (29) 8 PAGE 874 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (56)! NOTE 5 OIL AND GAS PRODUC (57)! 9 PAGE 875 NOTE 6 RELATED PART! 9 PAGE 875 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (69) NOTE 7 OIL AND GAS INFORM (70) NOTE 7 OIL AND GAS INFORM (71)! 11 PAGE 877 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (28) SUPPLEMENTAL INFORMATION (26)!PARKER PARSLEY PRODUCING PROPER ITEM 6 SELECTED FINANCIAL (16)INDEX TO FINANCIAL STATE (13)Balance Sheet (29)Income Statement (30) STATEMENTS OF PARTNERS CA (29)Cash Flows (30)NOTE 4 INCOME TAXES (14)! NOTE 5 OIL AND GAS PRODUC (58)! NOTE 5 OIL AND GAS PRODUC (59)! 16 PAGE 901 NOTE 6 RELATED PAR! 16 PAGE 901 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (72) NOTE 7 OIL AND GAS INFORM (73)!18 PAGE 903 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (16)Beneficial Ownership (16)PROPERTIES 88A LPINDEX TO EXHIBITS (14)SELECTED FINANCIAL DATA (29) SUPPLEMENTAL INFORMATION (27)Balance Sheet (30)Income Statement (31) STATEMENTS OF PARTNERS CA (30)Cash Flows (31)NOTE 4 INCOME TAXES (15)! NOTE 5 OIL AND GAS PRODUC (60)! NOTE 5 OIL AND GAS PRODUC (61)! 9 PAGE 924 NOTE 6 RELATED PART! 9 PAGE 924 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (74) NOTE 7 OIL AND GAS INFORM (75) NOTE 7 OIL AND GAS INFORM (76)! 11 PAGE 926 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (30) SUPPLEMENTAL INFORMATION (28)Balance Sheet (31)Income Statement (32) STATEMENTS OF PARTNERS CA (31)Cash Flows (32)NOTE 4 INCOME TAXES (16)! NOTE 5 OIL AND GAS PRODUC (62)! NOTE 5 OIL AND GAS PRODUC (63)! 9 PAGE 943 NOTE 6 RELATED PART! 9 PAGE 943 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (77) NOTE 7 OIL AND GAS INFORM (78) NOTE 7 OIL AND GAS INFORM (79)!11 PAGE 945 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (31)!31 2000 1 PAGE 952 PARKER PARSLPARKER PARSLEY 89A LP ITEM 6 SELECTED FINANCIAL (17)INDEX TO FINANCIAL STATE (14)Balance Sheet (32)Income Statement (33) STATEMENTS OF PARTNERS CA (32)Cash Flows (33)NOTE 4 INCOME TAXES (17)! NOTE 5 OIL AND GAS PRODUC (64)! NOTE 5 OIL AND GAS PRODUC (65)! 16 PAGE 969 NOTE 6 RELATED PAR! 16 PAGE 969 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (80) NOTE 7 OIL AND GAS INFORM (81) NOTE 7 OIL AND GAS INFORM (82) NOTE 7 OIL AND GAS INFORM (83)! 18 PAGE 971 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (17)Beneficial Ownership (17)PARKER PARSLEY 89A LP (1)INDEX TO EXHIBITS (15)SELECTED FINANCIAL DATA (32) SUPPLEMENTAL INFORMATION (29)Balance Sheet (33)Income Statement (34) STATEMENTS OF PARTNERS CA (33)Cash Flows (34) 8 PAGE 991 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (66)! NOTE 5 OIL AND GAS PRODUC (67)! 9 PAGE 992 NOTE 6 RELATED PART! 9 PAGE 992 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (84) NOTE 7 OIL AND GAS INFORM (85) NOTE 7 OIL AND GAS INFORM (86)! 11 PAGE 994 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (33)!31 2000 1 PAGE 1001 PARKER PARSBalance Sheet (34)Income Statement (35) STATEMENTS OF PARTNERS CA (34)Cash Flows (35)!8 PAGE 1010 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (68)! NOTE 5 OIL AND GAS PRODUC (69)! 9 PAGE 1011 NOTE 6 RELATED PAR! 9 PAGE 1011 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (87) NOTE 7 OIL AND GAS INFORM (88) NOTE 7 OIL AND GAS INFORM (89)!11 PAGE 1013 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (34) SUPPLEMENTAL INFORMATION (30)Balance Sheet (35)Income Statement (36) STATEMENTS OF PARTNERS CA (35)Cash Flows (36)!8 PAGE 1029 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (70)! NOTE 5 OIL AND GAS PRODUC (71)! 9 PAGE 1030 NOTE 6 RELATED PAR! 9 PAGE 1030 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (90) NOTE 7 OIL AND GAS INFORM (91) NOTE 7 OIL AND GAS INFORM (92)! 11 PAGE 1032 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (35) SUPPLEMENTAL INFORMATION (31)Balance Sheet (36)Income Statement (37) STATEMENTS OF PARTNERS CA (36)Cash Flows (37)!8 PAGE 1048 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (72)! NOTE 5 OIL AND GAS PRODUC (73)! 9 PAGE 1049 NOTE 6 RELATED PAR! 9 PAGE 1049 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (93) NOTE 7 OIL AND GAS INFORM (94) NOTE 7 OIL AND GAS INFORM (95)! 11 PAGE 1051 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (36)!31 2000 1 PAGE 1058 PARKER PARSPARKER PARSLEY 90A LP ITEM 6 SELECTED FINANCIAL (18)INDEX TO FINANCIAL STATE (15)Balance Sheet (37)Income Statement (38) STATEMENTS OF PARTNERS CA (37)Cash Flows (38)!15 PAGE 1074 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (74)! NOTE 5 OIL AND GAS PRODUC (75)! NOTE 6 RELATED PARTY TRAN (10)! NOTE 6 RELATED PARTY TRAN (11) NOTE 7 OIL AND GAS INFORM (96) NOTE 7 OIL AND GAS INFORM (97)! 18 PAGE 1077 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (18)Beneficial Ownership (18)PARKER PARSLEY 90A LP (1)INDEX TO EXHIBITS (16)SELECTED FINANCIAL DATA (37) SUPPLEMENTAL INFORMATION (32)PARKER PARSLEY 90B CONV LP ITEM 6 SELECTED FINANCIAL (19)INDEX TO FINANCIAL STATE (16)Balance Sheet (38)Income Statement (39) STATEMENTS OF PARTNERS CA (38)Cash Flows (39)!16 PAGE 1105 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (76)! NOTE 5 OIL AND GAS PRODUC (77)! NOTE 6 RELATED PARTY TRAN (12)! NOTE 6 RELATED PARTY TRAN (13) NOTE 7 OIL AND GAS INFORM (98) NOTE 7 OIL AND GAS INFORM (99) NOTE 7 OIL AND GAS INFOR (100)! 19 PAGE 1108 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (19)Beneficial Ownership (19) PARKER PARSLEY 90B CONV LP (1)INDEX TO EXHIBITS (17)SELECTED FINANCIAL DATA (38)!31 2000 1 PAGE 1119 PARKER PARSPARKER PARSLEY 90B LP ITEM 6 SELECTED FINANCIAL (20)INDEX TO FINANCIAL STATE (17)Balance Sheet (39)Income Statement (40) STATEMENTS OF PARTNERS CA (39)Cash Flows (40)!16 PAGE 1136 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (78)! NOTE 5 OIL AND GAS PRODUC (79)! NOTE 6 RELATED PARTY TRAN (14)! NOTE 6 RELATED PARTY TRAN (15) NOTE 7 OIL AND GAS INFOR (101) NOTE 7 OIL AND GAS INFOR (102) NOTE 7 OIL AND GAS INFOR (103)! 19 PAGE 1139 NOTE 8 MAJOR CUS!ITEM 10 DIRECTORS AND EXEC (20)Beneficial Ownership (20)PARKER PARSLEY 90B LP (1)INDEX TO EXHIBITS (18)SELECTED FINANCIAL DATA (39) SUPPLEMENTAL INFORMATION (33)PARKER PARSLEY 90C CONV LP ITEM 6 SELECTED FINANCIAL (21)INDEX TO FINANCIAL STATE (18)Balance Sheet (40)Income Statement (41) STATEMENTS OF PARTNERS CA (40)Cash Flows (41)!15 PAGE 1166 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (80)! NOTE 5 OIL AND GAS PRODUC (81)! NOTE 6 RELATED PARTY TRAN (16)! NOTE 6 RELATED PARTY TRAN (17) NOTE 7 OIL AND GAS INFOR (104) NOTE 7 OIL AND GAS INFOR (105) NOTE 7 OIL AND GAS INFOR (106)! 18 PAGE 1169 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (21)Beneficial Ownership (21) PARKER PARSLEY 90C CONV LP (1)INDEX TO EXHIBITS (19)SELECTED FINANCIAL DATA (40)!31 2000 1 PAGE 1180 PARKER PARSPARKER PARSLEY 90C LP ITEM 6 SELECTED FINANCIAL (22)INDEX TO FINANCIAL STATE (19)Balance Sheet (41)Income Statement (42) STATEMENTS OF PARTNERS CA (41)Cash Flows (42)!15 PAGE 1196 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (82)! NOTE 5 OIL AND GAS PRODUC (83)! NOTE 6 RELATED PARTY TRAN (18)! NOTE 6 RELATED PARTY TRAN (19) NOTE 7 OIL AND GAS INFOR (107) NOTE 7 OIL AND GAS INFOR (108) NOTE 7 OIL AND GAS INFOR (109)! 18 PAGE 1199 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (22)Beneficial Ownership (22)PARKER PARSLEY 90C LP (1)INDEX TO EXHIBITS (20)SELECTED FINANCIAL DATA (41) SUPPLEMENTAL INFORMATION (34)Balance Sheet (42)Income Statement (43) STATEMENTS OF PARTNERS CA (42)Cash Flows (43)!8 PAGE 1219 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (84)! NOTE 5 OIL AND GAS PRODUC (85)! 9 PAGE 1220 NOTE 6 RELATED PAR! 9 PAGE 1220 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (110) NOTE 7 OIL AND GAS INFOR (111) NOTE 7 OIL AND GAS INFOR (112)! 11 PAGE 1222 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (42) SUPPLEMENTAL INFORMATION (35)Balance Sheet (43)Income Statement (44) STATEMENTS OF PARTNERS CA (43)Cash Flows (44)!8 PAGE 1238 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (86)! NOTE 5 OIL AND GAS PRODUC (87)! 9 PAGE 1239 NOTE 6 RELATED PAR! 9 PAGE 1239 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (113) NOTE 7 OIL AND GAS INFOR (114) NOTE 7 OIL AND GAS INFOR (115)! 11 PAGE 1241 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (43)!31 2000 1 PAGE 1248 PARKER PARSPARKER PARSLEY 91A LP ITEM 6 SELECTED FINANCIAL (23)INDEX TO FINANCIAL STATE (20)Balance Sheet (44)Income Statement (45) STATEMENTS OF PARTNERS CA (44)Cash Flows (45)!15 PAGE 1264 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (88)! NOTE 5 OIL AND GAS PRODUC (89)! NOTE 6 RELATED PARTY TRAN (20)! NOTE 6 RELATED PARTY TRAN (21) NOTE 7 OIL AND GAS INFOR (116) NOTE 7 OIL AND GAS INFOR (117) NOTE 7 OIL AND GAS INFOR (118)! 18 PAGE 1267 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (23)Beneficial Ownership (23)PARKER PARSLEY 91A LP (1)INDEX TO EXHIBITS (21)SELECTED FINANCIAL DATA (44)!31 2000 1 PAGE 1278 PARKER PARSPARKER PARSLEY 91B LP ITEM 6 SELECTED FINANCIAL (24)INDEX TO FINANCIAL STATE (21)Balance Sheet (45)Income Statement (46) STATEMENTS OF PARTNERS CA (45)Cash Flows (46)!15 PAGE 1294 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (90)! NOTE 5 OIL AND GAS PRODUC (91)! NOTE 6 RELATED PARTY TRAN (22)! NOTE 6 RELATED PARTY TRAN (23) NOTE 7 OIL AND GAS INFOR (119) NOTE 7 OIL AND GAS INFOR (120) NOTE 7 OIL AND GAS INFOR (121)! 18 PAGE 1297 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (24)Beneficial Ownership (24)PARKER PARSLEY 91B LP (1)INDEX TO EXHIBITS (22)SELECTED FINANCIAL DATA (45)POWER OF ATTORNEYPOWER OF ATTORNEY (1)POWER OF ATTORNEY (2)POWER OF ATTORNEY (3)POWER OF ATTORNEY (4)POWER OF ATTORNEY (5)POWER OF ATTORNEY (6)POWER OF ATTORNEY (7)!2001 THE BOARD OF DIRECTORS REC!2001 THE BOARD OF DIRECTORS (1)!2001 THE BOARD OF DIRECTORS (2)PAGE 2U } J} U}  } U G    $PIONEER NATURAL RESOURCES CO S-4 04/17/2001KCEXAMPLE CALCULATION OF MERGER VALUE FOR PARKER & PARSLEY 81-I, LTD. @ 8Aggregate merger value for limited partners as set forth2 *in Table 2 of Appendix A to this document:  Reserve value~  552,609' Plus working capital value~ 71,931 Merger value~ 624,540>6Initial investment as set forth in Table 1 and Table 6'of Appendix A to this document:3+ Initial investment by limited partners 7,410,0003+ Less initial investment by Pioneer USA433,0003+ Initial investment without Pioneer USA 6,977,00080Number of per 1,000 limited partner investments:~ 6,977<4Per 1,000 limited partner investment as set forth in/'Table 3 of Appendix A to this document: Reserve valueS@(1) divided by (4)DlXL@4(cDkGd@4 !"#$%&'()*+,-./0123456789:;<=>?"  Working capital value  Q$@ (2) divided by (4)!!!" Merger value""q= ף`V@"(3) divided by (4)###$?%7Allocation between cash and Pioneer common stock before)&!adjustment for fractional shares:2'*Aggregate cash payment to limited partners~ '~ ' '(3) multiplied by 25%C(;Aggregate value of Pioneer common stock to limited partners)~ )~ )֖)(3) multiplied by 75%***+++624,540,,,-E.=Aggregate number of shares of Pioneer common stock offered to+/#limited partners of the partnership//i@/(6) divided by 18.000001E2=Aggregate number of shares of Pioneer common stock offered toE3=limited partners of the partnership rounded up to the nearest4 whole share~ 4426,0235556@78Adjustment to cash for rounding up of fractional shares:8 Merger value88624,540D9< Less: Aggregate value of Pioneer common stock to limited: partners:~ ::(7) multiplied by 18.00;;;6<. Aggregate cash payment to limited partners<<156,126===>B?:Number of shares of Pioneer common stock offered per 1,000Do lz!~Z/ I%P, Yc@ABCDEF"@limited partner investment@@ףp= @@(7) divided by (4)AAABC$D____________________________1E)Created by Morningstar Document Research.0F(http://documentresearch.morningstar.com/xznb:=PF0*8X> @FFEEDD l  YJM dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/?? SECURITIES AND EXC!CALCULATION OF REGISTRATION FEETO BE HELD ON 2001TABLE OF CONTENTSPAGE 7 LIST OF APPENDICES!LIMITED PARTNER INVESTMENT REPA!LIMITED PARTNER INVESTMENT (1) 5 PAGE 15 NYMEX FUTURES PRICES!EXAMPLE CALCULATION OF MERGER VIncome Statement (1)AT DECEMBER 31 2000!15 PAGE 25 COMPARATIVE PER SHAR!25 PAGE 35 REASONS FOR THE MERGFAIRNESS OPINIONFAIRNESS OPINION (1)!LEGAL OPINION FOR LIMITED PARTN!LEGAL OPINION FOR LIMITED P (1)!NONMANAGING GENERAL PARTNERS OF!49 PAGE 59 PAYMENT OF EXPENSES !58 PAGE 68 COMPARATIVE PER SHAR!60 PAGE 70 OWNERSHIP OF PARTNER PIONEER PIONEER USATHE DRILLING PARTNERSHIPSTHE DRILLING PARTNERSHIPS (1)THE INCOME PARTNERSHIPS INTERESTSINTERESTS (1)INTERESTS (2)INTERESTS (3)INTERESTS (4)INTERESTS (5)!WHERE YOU CAN FIND MORE INFORMAAS OF DECEMBER 31 2000YEAR ENDED DECEMBER 31 2000!QUANTITIES OF OIL AND GAS RESER!STANDARDIZED MEASURE OF DISCOUN CASH FLOWSAS OF MARCH 31 2001AS OF MARCH 31 2001 (1)AS OF MARCH 31 2001 (2)AS OF MARCH 31 2001 (3)AS OF MARCH 31 2001 (4)AS OF MARCH 31 2001 (5)!FROM INCEPTION THROUGH MARCH 31!ANNUAL REPURCHASE PRICES AND AGOF EACH PARTNERSHIP!FOR THE THREE MONTHS ENDED MARCAS OF DECEMBER 31 2000 (1)AS OF MARCH 31 2001 (6)!THE YEARS ENDED DECEMBER 31 200AS OF DECEMBER 31 2000 (2)DECEMBER 31 2000 AND 1999EFFECTIVE DECEMBER 31 2000 EFFECTIVE DECEMBER 31 2000 (1) RECITALS RECITALS (1) SUPPLEMENTAL INFORMATION TABLEBalance SheetIncome Statement (2) STATEMENTS OF PARTNERS CAPITALCash Flows (1)NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCING A! NOTE 5 OIL AND GAS PRODUCI (1)! NOTE 6 RELATED PARTY TRANSACTI! NOTE 6 RELATED PARTY TRANS (1)! NOTE 7 OIL AND GAS INFORMATION! NOTE 7 OIL AND GAS INFORMA (1)! NOTE 7 OIL AND GAS INFORMA (2)!11 PAGE 163 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA SUPPLEMENTAL INFORMATION T (1)Balance Sheet (1)Income Statement (3) STATEMENTS OF PARTNERS CAP (1)Cash Flows (2)NOTE 4 INCOME TAXES (1)! NOTE 5 OIL AND GAS PRODUCI (2)! NOTE 5 OIL AND GAS PRODUCI (3)! 9 PAGE 180 NOTE 6 RELATED PAR! 9 PAGE 180 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORMA (3)! NOTE 7 OIL AND GAS INFORMA (4)! NOTE 7 OIL AND GAS INFORMA (5)!11 PAGE 182 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (1) SUPPLEMENTAL INFORMATION T (2) ITEM 6 SELECTED FINANCIAL DATAINDEX TO FINANCIAL STATEMENTSBalance Sheet (2)Income Statement (4) STATEMENTS OF PARTNERS CAP (2)Cash Flows (3)!15 PAGE 205 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCI (4)! NOTE 5 OIL AND GAS PRODUCI (5)! NOTE 6 RELATED PARTY TRANS (2)! NOTE 6 RELATED PARTY TRANS (3)! NOTE 7 OIL AND GAS INFORMA (6)! NOTE 7 OIL AND GAS INFORMA (7)! NOTE 7 OIL AND GAS INFORMA (8)! NOTE 7 OIL AND GAS INFORMA (9)! NOTE 7 OIL AND GAS INFORM (10)! 18 PAGE 208 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECUTIVEBeneficial OwnershipPARKER PARSLEY 82I LTDINDEX TO EXHIBITSSELECTED FINANCIAL DATA (2) SUPPLEMENTAL INFORMATION T (3) ITEM 6 SELECTED FINANCIAL (1)INDEX TO FINANCIAL STATEM (1)Balance Sheet (3)Income Statement (5) STATEMENTS OF PARTNERS CAP (3)Cash Flows (4)NOTE 4 INCOME TAXES (2)! NOTE 5 OIL AND GAS PRODUCI (6)! NOTE 5 OIL AND GAS PRODUCI (7)! 16 PAGE 236 NOTE 6 RELATED PAR! 16 PAGE 236 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (11)! NOTE 7 OIL AND GAS INFORM (12)! NOTE 7 OIL AND GAS INFORM (13)!18 PAGE 238 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (1)Beneficial Ownership (1)PARKER PARSLEY 82II LTDINDEX TO EXHIBITS (1)SELECTED FINANCIAL DATA (3) SUPPLEMENTAL INFORMATION T (4)Balance Sheet (4)Income Statement (6) STATEMENTS OF PARTNERS CAP (4)Cash Flows (5)NOTE 4 INCOME TAXES (3)! NOTE 5 OIL AND GAS PRODUCI (8)! NOTE 5 OIL AND GAS PRODUCI (9)! 9 PAGE 259 NOTE 6 RELATED PART! 9 PAGE 259 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (14)! NOTE 7 OIL AND GAS INFORM (15)! NOTE 7 OIL AND GAS INFORM (16)!11 PAGE 261 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (4) SUPPLEMENTAL INFORMATION T (5)PARKER PARSLEY 83A LTD ITEM 6 SELECTED FINANCIAL (2)INDEX TO FINANCIAL STATEM (2)Balance Sheet (5)Income Statement (7) STATEMENTS OF PARTNERS CAP (5)Cash Flows (6)NOTE 4 INCOME TAXES (4)! NOTE 5 OIL AND GAS PRODUC (10)! NOTE 5 OIL AND GAS PRODUC (11)! 16 PAGE 285 NOTE 6 RELATED PAR! 16 PAGE 285 NOTE 6 RELATED (1)!NOTE 7 OIL AND GAS INFORMATION  NOTE 7 OIL AND GAS INFORMA (1) NOTE 7 OIL AND GAS INFORMA (2)! 18 PAGE 287 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECU (2)Beneficial Ownership (2)PARKER PARSLEY 83A LTD (1)INDEX TO EXHIBITS (2)SELECTED FINANCIAL DATA (5) SUPPLEMENTAL INFORMATION T (6)PARKER PARSLEY 83B LTD ITEM 6 SELECTED FINANCIAL (3)INDEX TO FINANCIAL STATEM (3)Balance Sheet (6)Income Statement (8) STATEMENTS OF PARTNERS CAP (6)Cash Flows (7)NOTE 4 INCOME TAXES (5)! NOTE 5 OIL AND GAS PRODUC (12)! NOTE 5 OIL AND GAS PRODUC (13)! 16 PAGE 315 NOTE 6 RELATED PAR! 16 PAGE 315 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (3) NOTE 7 OIL AND GAS INFORMA (4) NOTE 7 OIL AND GAS INFORMA (5)!18 PAGE 317 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (3)Beneficial Ownership (3)PARKER PARSLEY 83B LTD (1)INDEX TO EXHIBITS (3)SELECTED FINANCIAL DATA (6) SUPPLEMENTAL INFORMATION T (7)PARKER PARSLEY 84A LTD ITEM 6 SELECTED FINANCIAL (4)INDEX TO FINANCIAL STATEM (4)Balance Sheet (7)Income Statement (9) STATEMENTS OF PARTNERS CAP (7)Cash Flows (8)!15 PAGE 344 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (14)! NOTE 5 OIL AND GAS PRODUC (15)! 16 PAGE 345 NOTE 6 RELATED PAR! 16 PAGE 345 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (6) NOTE 7 OIL AND GAS INFORMA (7) NOTE 7 OIL AND GAS INFORMA (8)!18 PAGE 347 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (4)Beneficial Ownership (4)PARKER PARSLEY 84A LTD (1)INDEX TO EXHIBITS (4)SELECTED FINANCIAL DATA (7) SUPPLEMENTAL INFORMATION T (8)PARKER PARSLEY 85A LTD ITEM 6 SELECTED FINANCIAL (5)INDEX TO FINANCIAL STATEM (5)Balance Sheet (8)Income Statement (10) STATEMENTS OF PARTNERS CAP (8)Cash Flows (9)NOTE 4 INCOME TAXES (6)! NOTE 5 OIL AND GAS PRODUC (16)! NOTE 5 OIL AND GAS PRODUC (17)! 16 PAGE 375 NOTE 6 RELATED PAR! 16 PAGE 375 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (9) NOTE 7 OIL AND GAS INFORM (10) NOTE 7 OIL AND GAS INFORM (11)!18 PAGE 377 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (5)Beneficial Ownership (5)PARKER PARSLEY 85A LTD (1)INDEX TO EXHIBITS (5)SELECTED FINANCIAL DATA (8) SUPPLEMENTAL INFORMATION T (9)PARKER PARSLEY 85B LTD ITEM 6 SELECTED FINANCIAL (6)!7 PAGE 396 ITEM 8 FINANCIAL STABalance Sheet (9) STATEMENTS OF PARTNERS CAP (9)Cash Flows (10)!15 PAGE 404 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (18)! NOTE 5 OIL AND GAS PRODUC (19)! 16 PAGE 405 NOTE 6 RELATED PAR! 16 PAGE 405 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (12) NOTE 7 OIL AND GAS INFORM (13) NOTE 7 OIL AND GAS INFORM (14)!18 PAGE 407 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (6)Beneficial Ownership (6)PARKER PARSLEY 85B LTD (1)INDEX TO EXHIBITS (6)SELECTED FINANCIAL DATA (9) SUPPLEMENTAL INFORMATION (10)Balance Sheet (10)Income Statement (11) STATEMENTS OF PARTNERS CA (10)Cash Flows (11)NOTE 4 INCOME TAXES (7)! NOTE 5 OIL AND GAS PRODUC (20)! NOTE 5 OIL AND GAS PRODUC (21)! 9 PAGE 428 NOTE 6 RELATED PART! 9 PAGE 428 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (15) NOTE 7 OIL AND GAS INFORM (16) NOTE 7 OIL AND GAS INFORM (17)! 11 PAGE 430 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (10) SUPPLEMENTAL INFORMATION (11)Balance Sheet (11)Income Statement (12) STATEMENTS OF PARTNERS CA (11)Cash Flows (12) 8 PAGE 446 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (22)! NOTE 5 OIL AND GAS PRODUC (23)! 9 PAGE 447 NOTE 6 RELATED PART! 9 PAGE 447 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (18) NOTE 7 OIL AND GAS INFORM (19) NOTE 7 OIL AND GAS INFORM (20)! 11 PAGE 449 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (11) SUPPLEMENTAL INFORMATION (12)PARKER PARSLEY 86A LTD ITEM 6 SELECTED FINANCIAL (7)INDEX TO FINANCIAL STATEM (6)Balance Sheet (12)Income Statement (13) STATEMENTS OF PARTNERS CA (12)Cash Flows (13)NOTE 4 INCOME TAXES (8)! NOTE 5 OIL AND GAS PRODUC (24)! NOTE 5 OIL AND GAS PRODUC (25)! 16 PAGE 473 NOTE 6 RELATED PAR! 16 PAGE 473 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (21) NOTE 7 OIL AND GAS INFORM (22) NOTE 7 OIL AND GAS INFORM (23)!18 PAGE 475 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (7)Beneficial Ownership (7)PARKER PARSLEY 86A LTD (1)INDEX TO EXHIBITS (7)SELECTED FINANCIAL DATA (12) SUPPLEMENTAL INFORMATION (13)PARKER PARSLEY 86B LTD ITEM 6 SELECTED FINANCIAL (8)INDEX TO FINANCIAL STATEM (7)Balance Sheet (13)Income Statement (14) STATEMENTS OF PARTNERS CA (13)Cash Flows (14)!16 PAGE 503 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (26)! NOTE 5 OIL AND GAS PRODUC (27)! NOTE 6 RELATED PARTY TRANS (4)! NOTE 6 RELATED PARTY TRANS (5) NOTE 7 OIL AND GAS INFORM (24) NOTE 7 OIL AND GAS INFORM (25) NOTE 7 OIL AND GAS INFORM (26)!19 PAGE 506 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (8)Beneficial Ownership (8)PARKER PARSLEY 86B LTD (1)INDEX TO EXHIBITS (8)SELECTED FINANCIAL DATA (13) SUPPLEMENTAL INFORMATION (14) ITEM 6 SELECTED FINANCIAL (9)!7 PAGE 525 ITEM 8 FINANCIAL STABalance Sheet (14)Income Statement (15) STATEMENTS OF PARTNERS CA (14)Cash Flows (15)NOTE 4 INCOME TAXES (9)! NOTE 5 OIL AND GAS PRODUC (28)! NOTE 5 OIL AND GAS PRODUC (29)! 16 PAGE 534 NOTE 6 RELATED PAR! 16 PAGE 534 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (27) NOTE 7 OIL AND GAS INFORM (28) NOTE 7 OIL AND GAS INFORM (29)!18 PAGE 536 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (9)Beneficial Ownership (9)PARKER PARSLEY 86C LTDSELECTED FINANCIAL DATA (14) SUPPLEMENTAL INFORMATION (15)Balance Sheet (15)Income Statement (16) STATEMENTS OF PARTNERS CA (15)Cash Flows (16) 8 PAGE 556 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (30)! NOTE 5 OIL AND GAS PRODUC (31)! NOTE 6 RELATED PARTY TRANS (6)! NOTE 6 RELATED PARTY TRANS (7) NOTE 7 OIL AND GAS INFORM (30) NOTE 7 OIL AND GAS INFORM (31) NOTE 7 OIL AND GAS INFORM (32)! 11 PAGE 559 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (15) SUPPLEMENTAL INFORMATION (16)Balance Sheet (16)Income Statement (17) STATEMENTS OF PARTNERS CA (16)Cash Flows (17)NOTE 4 INCOME TAXES (10)! NOTE 5 OIL AND GAS PRODUC (32)! NOTE 5 OIL AND GAS PRODUC (33)! 9 PAGE 576 NOTE 6 RELATED PART! 9 PAGE 576 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (33) NOTE 7 OIL AND GAS INFORM (34) NOTE 7 OIL AND GAS INFORM (35)!11 PAGE 578 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (16) SUPPLEMENTAL INFORMATION (17) ITEM 6 SELECTED FINANCIAL (10)!8 PAGE 594 ITEM 8 FINANCIAL STABalance Sheet (17)Income Statement (18) STATEMENTS OF PARTNERS CA (17)Cash Flows (18)NOTE 4 INCOME TAXES (11)! NOTE 5 OIL AND GAS PRODUC (34)! NOTE 5 OIL AND GAS PRODUC (35)! 17 PAGE 603 NOTE 6 RELATED PAR! 17 PAGE 603 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (36) NOTE 7 OIL AND GAS INFORM (37) NOTE 7 OIL AND GAS INFORM (38)! 19 PAGE 605 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (10)Beneficial Ownership (10)PARKER PARSLEY 87A LTDSELECTED FINANCIAL DATA (17) SUPPLEMENTAL INFORMATION (18)Balance Sheet (18)Income Statement (19) STATEMENTS OF PARTNERS CA (18)Cash Flows (19) 8 PAGE 625 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (36)! NOTE 5 OIL AND GAS PRODUC (37)! 9 PAGE 626 NOTE 6 RELATED PART! 9 PAGE 626 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (39) NOTE 7 OIL AND GAS INFORM (40) NOTE 7 OIL AND GAS INFORM (41)! 11 PAGE 628 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (18) SUPPLEMENTAL INFORMATION (19) ITEM 6 SELECTED FINANCIAL (11)INDEX TO FINANCIAL STATEM (8)Balance Sheet (19)Income Statement (20) STATEMENTS OF PARTNERS CA (19)Cash Flows (20)NOTE 4 INCOME TAXES (12)! NOTE 5 OIL AND GAS PRODUC (38)! NOTE 5 OIL AND GAS PRODUC (39)! 17 PAGE 653 NOTE 6 RELATED PAR! 17 PAGE 653 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (42) NOTE 7 OIL AND GAS INFORM (43) NOTE 7 OIL AND GAS INFORM (44)! 19 PAGE 655 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (11)Beneficial Ownership (11)PARKER PARSLEY 87B LTDINDEX TO EXHIBITS (9)SELECTED FINANCIAL DATA (19) SUPPLEMENTAL INFORMATION (20) ITEM 6 SELECTED FINANCIAL (12)INDEX TO FINANCIAL STATEM (9)Balance Sheet (20)Income Statement (21) STATEMENTS OF PARTNERS CA (20)Cash Flows (21)!16 PAGE 683 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (40)! NOTE 5 OIL AND GAS PRODUC (41)! NOTE 6 RELATED PARTY TRANS (8)! NOTE 6 RELATED PARTY TRANS (9) NOTE 7 OIL AND GAS INFORM (45) NOTE 7 OIL AND GAS INFORM (46) NOTE 7 OIL AND GAS INFORM (47)!19 PAGE 686 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (12)Beneficial Ownership (12)PROPERTIES 87A LTDINDEX TO EXHIBITS (10)SELECTED FINANCIAL DATA (20) SUPPLEMENTAL INFORMATION (21) ITEM 6 SELECTED FINANCIAL (13)INDEX TO FINANCIAL STATE (10)Balance Sheet (21)Income Statement (22) STATEMENTS OF PARTNERS CA (21)Cash Flows (22)!16 PAGE 714 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (42)! NOTE 5 OIL AND GAS PRODUC (43)! 17 PAGE 715 NOTE 6 RELATED PAR! 17 PAGE 715 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (48) NOTE 7 OIL AND GAS INFORM (49) NOTE 7 OIL AND GAS INFORM (50)! 19 PAGE 717 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (13)Beneficial Ownership (13)PROPERTIES 87B LTDINDEX TO EXHIBITS (11)SELECTED FINANCIAL DATA (21) SUPPLEMENTAL INFORMATION (22)Balance Sheet (22)Income Statement (23) STATEMENTS OF PARTNERS CA (22)Cash Flows (23) 8 PAGE 737 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (44)! NOTE 5 OIL AND GAS PRODUC (45)! 9 PAGE 738 NOTE 6 RELATED PART! 9 PAGE 738 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (51) NOTE 7 OIL AND GAS INFORM (52) NOTE 7 OIL AND GAS INFORM (53)! 11 PAGE 740 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (22) SUPPLEMENTAL INFORMATION (23)Balance Sheet (23)Income Statement (24) STATEMENTS OF PARTNERS CA (23)Cash Flows (24) 8 PAGE 756 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (46)! NOTE 5 OIL AND GAS PRODUC (47)! 9 PAGE 757 NOTE 6 RELATED PART! 9 PAGE 757 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (54) NOTE 7 OIL AND GAS INFORM (55) NOTE 7 OIL AND GAS INFORM (56)! 11 PAGE 759 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (23)!31 2000 1 PAGE 766 PARKER PARSLPARKER PARSLEY 88A LP ITEM 6 SELECTED FINANCIAL (14)INDEX TO FINANCIAL STATE (11)Balance Sheet (24)Income Statement (25) STATEMENTS OF PARTNERS CA (24)Cash Flows (25)NOTE 4 INCOME TAXES (13)! NOTE 5 OIL AND GAS PRODUC (48)! NOTE 5 OIL AND GAS PRODUC (49)! 16 PAGE 783 NOTE 6 RELATED PAR! 16 PAGE 783 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (57) NOTE 7 OIL AND GAS INFORM (58) NOTE 7 OIL AND GAS INFORM (59)! 18 PAGE 785 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (14)Beneficial Ownership (14)PARKER PARSLEY 88A LP (1)INDEX TO EXHIBITS (12)SELECTED FINANCIAL DATA (24) SUPPLEMENTAL INFORMATION (24)Balance Sheet (25)Income Statement (26) STATEMENTS OF PARTNERS CA (25)Cash Flows (26) 8 PAGE 805 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (50)! NOTE 5 OIL AND GAS PRODUC (51)! 9 PAGE 806 NOTE 6 RELATED PART! 9 PAGE 806 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (60) NOTE 7 OIL AND GAS INFORM (61) NOTE 7 OIL AND GAS INFORM (62)! 11 PAGE 808 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (25)!31 2000 1 PAGE 815 PARKER PARSLPARKER PARSLEY 88B LP ITEM 6 SELECTED FINANCIAL (15)INDEX TO FINANCIAL STATE (12)Balance Sheet (26)Income Statement (27) STATEMENTS OF PARTNERS CA (26)Cash Flows (27)!16 PAGE 832 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (52)! NOTE 5 OIL AND GAS PRODUC (53)! 17 PAGE 833 NOTE 6 RELATED PAR! 17 PAGE 833 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (63) NOTE 7 OIL AND GAS INFORM (64) NOTE 7 OIL AND GAS INFORM (65)! 19 PAGE 835 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (15)Beneficial Ownership (15)PARKER PARSLEY 88B LP (1)INDEX TO EXHIBITS (13)SELECTED FINANCIAL DATA (26) SUPPLEMENTAL INFORMATION (25)Balance Sheet (27)Income Statement (28) STATEMENTS OF PARTNERS CA (27)Cash Flows (28) 8 PAGE 855 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (54)! NOTE 5 OIL AND GAS PRODUC (55)! 9 PAGE 856 NOTE 6 RELATED PART! 9 PAGE 856 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (66) NOTE 7 OIL AND GAS INFORM (67) NOTE 7 OIL AND GAS INFORM (68)! 11 PAGE 858 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (27)!31 2000 1 PAGE 865 PARKER PARSLBalance Sheet (28)Income Statement (29) STATEMENTS OF PARTNERS CA (28)Cash Flows (29) 8 PAGE 874 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (56)! NOTE 5 OIL AND GAS PRODUC (57)! 9 PAGE 875 NOTE 6 RELATED PART! 9 PAGE 875 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (69) NOTE 7 OIL AND GAS INFORM (70) NOTE 7 OIL AND GAS INFORM (71)! 11 PAGE 877 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (28) SUPPLEMENTAL INFORMATION (26)!PARKER PARSLEY PRODUCING PROPER ITEM 6 SELECTED FINANCIAL (16)INDEX TO FINANCIAL STATE (13)Balance Sheet (29)Income Statement (30) STATEMENTS OF PARTNERS CA (29)Cash Flows (30)NOTE 4 INCOME TAXES (14)! NOTE 5 OIL AND GAS PRODUC (58)! NOTE 5 OIL AND GAS PRODUC (59)! 16 PAGE 901 NOTE 6 RELATED PAR! 16 PAGE 901 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (72) NOTE 7 OIL AND GAS INFORM (73)!18 PAGE 903 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (16)Beneficial Ownership (16)PROPERTIES 88A LPINDEX TO EXHIBITS (14)SELECTED FINANCIAL DATA (29) SUPPLEMENTAL INFORMATION (27)Balance Sheet (30)Income Statement (31) STATEMENTS OF PARTNERS CA (30)Cash Flows (31)NOTE 4 INCOME TAXES (15)! NOTE 5 OIL AND GAS PRODUC (60)! NOTE 5 OIL AND GAS PRODUC (61)! 9 PAGE 924 NOTE 6 RELATED PART! 9 PAGE 924 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (74) NOTE 7 OIL AND GAS INFORM (75) NOTE 7 OIL AND GAS INFORM (76)! 11 PAGE 926 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (30) SUPPLEMENTAL INFORMATION (28)Balance Sheet (31)Income Statement (32) STATEMENTS OF PARTNERS CA (31)Cash Flows (32)NOTE 4 INCOME TAXES (16)! NOTE 5 OIL AND GAS PRODUC (62)! NOTE 5 OIL AND GAS PRODUC (63)! 9 PAGE 943 NOTE 6 RELATED PART! 9 PAGE 943 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (77) NOTE 7 OIL AND GAS INFORM (78) NOTE 7 OIL AND GAS INFORM (79)!11 PAGE 945 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (31)!31 2000 1 PAGE 952 PARKER PARSLPARKER PARSLEY 89A LP ITEM 6 SELECTED FINANCIAL (17)INDEX TO FINANCIAL STATE (14)Balance Sheet (32)Income Statement (33) STATEMENTS OF PARTNERS CA (32)Cash Flows (33)NOTE 4 INCOME TAXES (17)! NOTE 5 OIL AND GAS PRODUC (64)! NOTE 5 OIL AND GAS PRODUC (65)! 16 PAGE 969 NOTE 6 RELATED PAR! 16 PAGE 969 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (80) NOTE 7 OIL AND GAS INFORM (81) NOTE 7 OIL AND GAS INFORM (82) NOTE 7 OIL AND GAS INFORM (83)! 18 PAGE 971 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (17)Beneficial Ownership (17)PARKER PARSLEY 89A LP (1)INDEX TO EXHIBITS (15)SELECTED FINANCIAL DATA (32) SUPPLEMENTAL INFORMATION (29)Balance Sheet (33)Income Statement (34) STATEMENTS OF PARTNERS CA (33)Cash Flows (34) 8 PAGE 991 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (66)! NOTE 5 OIL AND GAS PRODUC (67)! 9 PAGE 992 NOTE 6 RELATED PART! 9 PAGE 992 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (84) NOTE 7 OIL AND GAS INFORM (85) NOTE 7 OIL AND GAS INFORM (86)! 11 PAGE 994 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (33)!31 2000 1 PAGE 1001 PARKER PARSBalance Sheet (34)Income Statement (35) STATEMENTS OF PARTNERS CA (34)Cash Flows (35)!8 PAGE 1010 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (68)! NOTE 5 OIL AND GAS PRODUC (69)! 9 PAGE 1011 NOTE 6 RELATED PAR! 9 PAGE 1011 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (87) NOTE 7 OIL AND GAS INFORM (88) NOTE 7 OIL AND GAS INFORM (89)!11 PAGE 1013 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (34) SUPPLEMENTAL INFORMATION (30)Balance Sheet (35)Income Statement (36) STATEMENTS OF PARTNERS CA (35)Cash Flows (36)!8 PAGE 1029 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (70)! NOTE 5 OIL AND GAS PRODUC (71)! 9 PAGE 1030 NOTE 6 RELATED PAR! 9 PAGE 1030 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (90) NOTE 7 OIL AND GAS INFORM (91) NOTE 7 OIL AND GAS INFORM (92)! 11 PAGE 1032 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (35) SUPPLEMENTAL INFORMATION (31)Balance Sheet (36)Income Statement (37) STATEMENTS OF PARTNERS CA (36)Cash Flows (37)!8 PAGE 1048 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (72)! NOTE 5 OIL AND GAS PRODUC (73)! 9 PAGE 1049 NOTE 6 RELATED PAR! 9 PAGE 1049 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (93) NOTE 7 OIL AND GAS INFORM (94) NOTE 7 OIL AND GAS INFORM (95)! 11 PAGE 1051 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (36)!31 2000 1 PAGE 1058 PARKER PARSPARKER PARSLEY 90A LP ITEM 6 SELECTED FINANCIAL (18)INDEX TO FINANCIAL STATE (15)Balance Sheet (37)Income Statement (38) STATEMENTS OF PARTNERS CA (37)Cash Flows (38)!15 PAGE 1074 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (74)! NOTE 5 OIL AND GAS PRODUC (75)! NOTE 6 RELATED PARTY TRAN (10)! NOTE 6 RELATED PARTY TRAN (11) NOTE 7 OIL AND GAS INFORM (96) NOTE 7 OIL AND GAS INFORM (97)! 18 PAGE 1077 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (18)Beneficial Ownership (18)PARKER PARSLEY 90A LP (1)INDEX TO EXHIBITS (16)SELECTED FINANCIAL DATA (37) SUPPLEMENTAL INFORMATION (32)PARKER PARSLEY 90B CONV LP ITEM 6 SELECTED FINANCIAL (19)INDEX TO FINANCIAL STATE (16)Balance Sheet (38)Income Statement (39) STATEMENTS OF PARTNERS CA (38)Cash Flows (39)!16 PAGE 1105 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (76)! NOTE 5 OIL AND GAS PRODUC (77)! NOTE 6 RELATED PARTY TRAN (12)! NOTE 6 RELATED PARTY TRAN (13) NOTE 7 OIL AND GAS INFORM (98) NOTE 7 OIL AND GAS INFORM (99) NOTE 7 OIL AND GAS INFOR (100)! 19 PAGE 1108 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (19)Beneficial Ownership (19) PARKER PARSLEY 90B CONV LP (1)INDEX TO EXHIBITS (17)SELECTED FINANCIAL DATA (38)!31 2000 1 PAGE 1119 PARKER PARSPARKER PARSLEY 90B LP ITEM 6 SELECTED FINANCIAL (20)INDEX TO FINANCIAL STATE (17)Balance Sheet (39)Income Statement (40) STATEMENTS OF PARTNERS CA (39)Cash Flows (40)!16 PAGE 1136 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (78)! NOTE 5 OIL AND GAS PRODUC (79)! NOTE 6 RELATED PARTY TRAN (14)! NOTE 6 RELATED PARTY TRAN (15) NOTE 7 OIL AND GAS INFOR (101) NOTE 7 OIL AND GAS INFOR (102) NOTE 7 OIL AND GAS INFOR (103)! 19 PAGE 1139 NOTE 8 MAJOR CUS!ITEM 10 DIRECTORS AND EXEC (20)Beneficial Ownership (20)PARKER PARSLEY 90B LP (1)INDEX TO EXHIBITS (18)SELECTED FINANCIAL DATA (39) SUPPLEMENTAL INFORMATION (33)PARKER PARSLEY 90C CONV LP ITEM 6 SELECTED FINANCIAL (21)INDEX TO FINANCIAL STATE (18)Balance Sheet (40)Income Statement (41) STATEMENTS OF PARTNERS CA (40)Cash Flows (41)!15 PAGE 1166 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (80)! NOTE 5 OIL AND GAS PRODUC (81)! NOTE 6 RELATED PARTY TRAN (16)! NOTE 6 RELATED PARTY TRAN (17) NOTE 7 OIL AND GAS INFOR (104) NOTE 7 OIL AND GAS INFOR (105) NOTE 7 OIL AND GAS INFOR (106)! 18 PAGE 1169 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (21)Beneficial Ownership (21) PARKER PARSLEY 90C CONV LP (1)INDEX TO EXHIBITS (19)SELECTED FINANCIAL DATA (40)!31 2000 1 PAGE 1180 PARKER PARSPARKER PARSLEY 90C LP ITEM 6 SELECTED FINANCIAL (22)INDEX TO FINANCIAL STATE (19)Balance Sheet (41)Income Statement (42) STATEMENTS OF PARTNERS CA (41)Cash Flows (42)!15 PAGE 1196 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (82)! NOTE 5 OIL AND GAS PRODUC (83)! NOTE 6 RELATED PARTY TRAN (18)! NOTE 6 RELATED PARTY TRAN (19) NOTE 7 OIL AND GAS INFOR (107) NOTE 7 OIL AND GAS INFOR (108) NOTE 7 OIL AND GAS INFOR (109)! 18 PAGE 1199 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (22)Beneficial Ownership (22)PARKER PARSLEY 90C LP (1)INDEX TO EXHIBITS (20)SELECTED FINANCIAL DATA (41) SUPPLEMENTAL INFORMATION (34)Balance Sheet (42)Income Statement (43) STATEMENTS OF PARTNERS CA (42)Cash Flows (43)!8 PAGE 1219 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (84)! NOTE 5 OIL AND GAS PRODUC (85)! 9 PAGE 1220 NOTE 6 RELATED PAR! 9 PAGE 1220 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (110) NOTE 7 OIL AND GAS INFOR (111) NOTE 7 OIL AND GAS INFOR (112)! 11 PAGE 1222 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (42) SUPPLEMENTAL INFORMATION (35)Balance Sheet (43)Income Statement (44) STATEMENTS OF PARTNERS CA (43)Cash Flows (44)!8 PAGE 1238 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (86)! NOTE 5 OIL AND GAS PRODUC (87)! 9 PAGE 1239 NOTE 6 RELATED PAR! 9 PAGE 1239 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (113) NOTE 7 OIL AND GAS INFOR (114) NOTE 7 OIL AND GAS INFOR (115)! 11 PAGE 1241 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (43)!31 2000 1 PAGE 1248 PARKER PARSPARKER PARSLEY 91A LP ITEM 6 SELECTED FINANCIAL (23)INDEX TO FINANCIAL STATE (20)Balance Sheet (44)Income Statement (45) STATEMENTS OF PARTNERS CA (44)Cash Flows (45)!15 PAGE 1264 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (88)! NOTE 5 OIL AND GAS PRODUC (89)! NOTE 6 RELATED PARTY TRAN (20)! NOTE 6 RELATED PARTY TRAN (21) NOTE 7 OIL AND GAS INFOR (116) NOTE 7 OIL AND GAS INFOR (117) NOTE 7 OIL AND GAS INFOR (118)! 18 PAGE 1267 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (23)Beneficial Ownership (23)PARKER PARSLEY 91A LP (1)INDEX TO EXHIBITS (21)SELECTED FINANCIAL DATA (44)!31 2000 1 PAGE 1278 PARKER PARSPARKER PARSLEY 91B LP ITEM 6 SELECTED FINANCIAL (24)INDEX TO FINANCIAL STATE (21)Balance Sheet (45)Income Statement (46) STATEMENTS OF PARTNERS CA (45)Cash Flows (46)!15 PAGE 1294 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (90)! NOTE 5 OIL AND GAS PRODUC (91)! NOTE 6 RELATED PARTY TRAN (22)! 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Diluted??333333??{Gz??)\(̿?ףp= ?p= #1?(\ @D"lB_Wh] %.SdM@ABCDEFGHIJKLMNOPQRSTUVWX@@@@@@@@A Dividends per shareAAAAA?A?A?BBBBBBBB'C Weighted average basic sharesD outstandingDD Y@DX@D33333Y@DfffffY@~ DDA@E%FSTATEMENT OF CASH FLOWS DATA:.G& Cash flows from operating activitiesGGG@Gz@Gfffffo@Gs@Gfffffl@G33333l@-H% Cash flows from (used in) investingI activitiesII33333CIPh~ I~ II33333SuIffffff+@-J% Cash flows from (used in) financingK activitiesKK!K33333nK}Kg@~ KK̬nL/M'BALANCE SHEET DATA (AS OF DECEMBER 31):&N Working capital (deficit)(d)NN@N9Nffffff+NLtNLG@N:@,O$ Property, plant and equipment, netOO@~ ON'~ O'O33333@Ow@OA@P Total assetsPP3@P@P@P2@~ P@P@Q Long-term obligationsQQ33333@Q2@Q@Qfffffj@~ Q2!~ Q&'R Preferred stock of subsidiaryRRRRRRRg@$S Total stockholders' equitySS̄@S33333G@S4@S̨@S333333@Sfffff@TU$V____________________________1W)Created by Morningstar Document Research.0X(http://documentresearch.morningstar.com/6 !g6j(=PF0*8X> @XXWWVV l  36JxO dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/?? SECURITIES AND EXC!CALCULATION OF REGISTRATION FEETO BE HELD ON 2001TABLE OF CONTENTSPAGE 7 LIST OF APPENDICES!LIMITED PARTNER INVESTMENT REPA!LIMITED PARTNER INVESTMENT (1) 5 PAGE 15 NYMEX FUTURES PRICES!EXAMPLE CALCULATION OF MERGER VIncome StatementAT DECEMBER 31 2000!15 PAGE 25 COMPARATIVE PER SHAR!25 PAGE 35 REASONS FOR THE MERGFAIRNESS OPINIONFAIRNESS OPINION (1)!LEGAL OPINION FOR LIMITED PARTN!LEGAL OPINION FOR LIMITED P (1)!NONMANAGING GENERAL PARTNERS OF!49 PAGE 59 PAYMENT OF EXPENSES !58 PAGE 68 COMPARATIVE PER SHAR!60 PAGE 70 OWNERSHIP OF PARTNER PIONEER PIONEER USATHE DRILLING PARTNERSHIPSTHE DRILLING PARTNERSHIPS (1)THE INCOME PARTNERSHIPS INTERESTSINTERESTS (1)INTERESTS (2)INTERESTS (3)INTERESTS (4)INTERESTS (5)!WHERE YOU CAN FIND MORE INFORMAAS OF DECEMBER 31 2000YEAR ENDED DECEMBER 31 2000!QUANTITIES OF OIL AND GAS RESER!STANDARDIZED MEASURE OF DISCOUN CASH FLOWSAS OF MARCH 31 2001AS OF MARCH 31 2001 (1)AS OF MARCH 31 2001 (2)AS OF MARCH 31 2001 (3)AS OF MARCH 31 2001 (4)AS OF MARCH 31 2001 (5)!FROM INCEPTION THROUGH MARCH 31!ANNUAL REPURCHASE PRICES AND AGOF EACH PARTNERSHIP!FOR THE THREE MONTHS ENDED MARCAS OF DECEMBER 31 2000 (1)AS OF MARCH 31 2001 (6)!THE YEARS ENDED DECEMBER 31 200AS OF DECEMBER 31 2000 (2)DECEMBER 31 2000 AND 1999EFFECTIVE DECEMBER 31 2000 EFFECTIVE DECEMBER 31 2000 (1) RECITALS RECITALS (1) SUPPLEMENTAL INFORMATION TABLEBalance SheetIncome Statement (2) STATEMENTS OF PARTNERS CAPITALCash Flows (1)NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCING A! NOTE 5 OIL AND GAS PRODUCI (1)! NOTE 6 RELATED PARTY TRANSACTI! NOTE 6 RELATED PARTY TRANS (1)! NOTE 7 OIL AND GAS INFORMATION! NOTE 7 OIL AND GAS INFORMA (1)! NOTE 7 OIL AND GAS INFORMA (2)!11 PAGE 163 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA SUPPLEMENTAL INFORMATION T (1)Balance Sheet (1)Income Statement (3) STATEMENTS OF PARTNERS CAP (1)Cash Flows (2)NOTE 4 INCOME TAXES (1)! NOTE 5 OIL AND GAS PRODUCI (2)! NOTE 5 OIL AND GAS PRODUCI (3)! 9 PAGE 180 NOTE 6 RELATED PAR! 9 PAGE 180 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORMA (3)! NOTE 7 OIL AND GAS INFORMA (4)! NOTE 7 OIL AND GAS INFORMA (5)!11 PAGE 182 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (1) SUPPLEMENTAL INFORMATION T (2) ITEM 6 SELECTED FINANCIAL DATAINDEX TO FINANCIAL STATEMENTSBalance Sheet (2)Income Statement (4) STATEMENTS OF PARTNERS CAP (2)Cash Flows (3)!15 PAGE 205 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCI (4)! NOTE 5 OIL AND GAS PRODUCI (5)! NOTE 6 RELATED PARTY TRANS (2)! NOTE 6 RELATED PARTY TRANS (3)! NOTE 7 OIL AND GAS INFORMA (6)! NOTE 7 OIL AND GAS INFORMA (7)! NOTE 7 OIL AND GAS INFORMA (8)! NOTE 7 OIL AND GAS INFORMA (9)! NOTE 7 OIL AND GAS INFORM (10)! 18 PAGE 208 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECUTIVEBeneficial OwnershipPARKER PARSLEY 82I LTDINDEX TO EXHIBITSSELECTED FINANCIAL DATA (2) SUPPLEMENTAL INFORMATION T (3) ITEM 6 SELECTED FINANCIAL (1)INDEX TO FINANCIAL STATEM (1)Balance Sheet (3)Income Statement (5) STATEMENTS OF PARTNERS CAP (3)Cash Flows (4)NOTE 4 INCOME TAXES (2)! NOTE 5 OIL AND GAS PRODUCI (6)! NOTE 5 OIL AND GAS PRODUCI (7)! 16 PAGE 236 NOTE 6 RELATED PAR! 16 PAGE 236 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (11)! NOTE 7 OIL AND GAS INFORM (12)! NOTE 7 OIL AND GAS INFORM (13)!18 PAGE 238 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (1)Beneficial Ownership (1)PARKER PARSLEY 82II LTDINDEX TO EXHIBITS (1)SELECTED FINANCIAL DATA (3) SUPPLEMENTAL INFORMATION T (4)Balance Sheet (4)Income Statement (6) STATEMENTS OF PARTNERS CAP (4)Cash Flows (5)NOTE 4 INCOME TAXES (3)! NOTE 5 OIL AND GAS PRODUCI (8)! NOTE 5 OIL AND GAS PRODUCI (9)! 9 PAGE 259 NOTE 6 RELATED PART! 9 PAGE 259 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (14)! NOTE 7 OIL AND GAS INFORM (15)! NOTE 7 OIL AND GAS INFORM (16)!11 PAGE 261 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (4) SUPPLEMENTAL INFORMATION T (5)PARKER PARSLEY 83A LTD ITEM 6 SELECTED FINANCIAL (2)INDEX TO FINANCIAL STATEM (2)Balance Sheet (5)Income Statement (7) STATEMENTS OF PARTNERS CAP (5)Cash Flows (6)NOTE 4 INCOME TAXES (4)! NOTE 5 OIL AND GAS PRODUC (10)! NOTE 5 OIL AND GAS PRODUC (11)! 16 PAGE 285 NOTE 6 RELATED PAR! 16 PAGE 285 NOTE 6 RELATED (1)!NOTE 7 OIL AND GAS INFORMATION  NOTE 7 OIL AND GAS INFORMA (1) NOTE 7 OIL AND GAS INFORMA (2)! 18 PAGE 287 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECU (2)Beneficial Ownership (2)PARKER PARSLEY 83A LTD (1)INDEX TO EXHIBITS (2)SELECTED FINANCIAL DATA (5) SUPPLEMENTAL INFORMATION T (6)PARKER PARSLEY 83B LTD ITEM 6 SELECTED FINANCIAL (3)INDEX TO FINANCIAL STATEM (3)Balance Sheet (6)Income Statement (8) STATEMENTS OF PARTNERS CAP (6)Cash Flows (7)NOTE 4 INCOME TAXES (5)! NOTE 5 OIL AND GAS PRODUC (12)! NOTE 5 OIL AND GAS PRODUC (13)! 16 PAGE 315 NOTE 6 RELATED PAR! 16 PAGE 315 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (3) NOTE 7 OIL AND GAS INFORMA (4) NOTE 7 OIL AND GAS INFORMA (5)!18 PAGE 317 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (3)Beneficial Ownership (3)PARKER PARSLEY 83B LTD (1)INDEX TO EXHIBITS (3)SELECTED FINANCIAL DATA (6) SUPPLEMENTAL INFORMATION T (7)PARKER PARSLEY 84A LTD ITEM 6 SELECTED FINANCIAL (4)INDEX TO FINANCIAL STATEM (4)Balance Sheet (7)Income Statement (9) STATEMENTS OF PARTNERS CAP (7)Cash Flows (8)!15 PAGE 344 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (14)! NOTE 5 OIL AND GAS PRODUC (15)! 16 PAGE 345 NOTE 6 RELATED PAR! 16 PAGE 345 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (6) NOTE 7 OIL AND GAS INFORMA (7) NOTE 7 OIL AND GAS INFORMA (8)!18 PAGE 347 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (4)Beneficial Ownership (4)PARKER PARSLEY 84A LTD (1)INDEX TO EXHIBITS (4)SELECTED FINANCIAL DATA (7) SUPPLEMENTAL INFORMATION T (8)PARKER PARSLEY 85A LTD ITEM 6 SELECTED FINANCIAL (5)INDEX TO FINANCIAL STATEM (5)Balance Sheet (8)Income Statement (10) STATEMENTS OF PARTNERS CAP (8)Cash Flows (9)NOTE 4 INCOME TAXES (6)! NOTE 5 OIL AND GAS PRODUC (16)! NOTE 5 OIL AND GAS PRODUC (17)! 16 PAGE 375 NOTE 6 RELATED PAR! 16 PAGE 375 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (9) NOTE 7 OIL AND GAS INFORM (10) NOTE 7 OIL AND GAS INFORM (11)!18 PAGE 377 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (5)Beneficial Ownership (5)PARKER PARSLEY 85A LTD (1)INDEX TO EXHIBITS (5)SELECTED FINANCIAL DATA (8) SUPPLEMENTAL INFORMATION T (9)PARKER PARSLEY 85B LTD ITEM 6 SELECTED FINANCIAL (6)!7 PAGE 396 ITEM 8 FINANCIAL STABalance Sheet (9) STATEMENTS OF PARTNERS CAP (9)Cash Flows (10)!15 PAGE 404 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (18)! NOTE 5 OIL AND GAS PRODUC (19)! 16 PAGE 405 NOTE 6 RELATED PAR! 16 PAGE 405 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (12) NOTE 7 OIL AND GAS INFORM (13) NOTE 7 OIL AND GAS INFORM (14)!18 PAGE 407 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (6)Beneficial Ownership (6)PARKER PARSLEY 85B LTD (1)INDEX TO EXHIBITS (6)SELECTED FINANCIAL DATA (9) SUPPLEMENTAL INFORMATION (10)Balance Sheet (10)Income Statement (11) STATEMENTS OF PARTNERS CA (10)Cash Flows (11)NOTE 4 INCOME TAXES (7)! NOTE 5 OIL AND GAS PRODUC (20)! NOTE 5 OIL AND GAS PRODUC (21)! 9 PAGE 428 NOTE 6 RELATED PART! 9 PAGE 428 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (15) NOTE 7 OIL AND GAS INFORM (16) NOTE 7 OIL AND GAS INFORM (17)! 11 PAGE 430 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (10) SUPPLEMENTAL INFORMATION (11)Balance Sheet (11)Income Statement (12) STATEMENTS OF PARTNERS CA (11)Cash Flows (12) 8 PAGE 446 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (22)! NOTE 5 OIL AND GAS PRODUC (23)! 9 PAGE 447 NOTE 6 RELATED PART! 9 PAGE 447 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (18) NOTE 7 OIL AND GAS INFORM (19) NOTE 7 OIL AND GAS INFORM (20)! 11 PAGE 449 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (11) SUPPLEMENTAL INFORMATION (12)PARKER PARSLEY 86A LTD ITEM 6 SELECTED FINANCIAL (7)INDEX TO FINANCIAL STATEM (6)Balance Sheet (12)Income Statement (13) STATEMENTS OF PARTNERS CA (12)Cash Flows (13)NOTE 4 INCOME TAXES (8)! NOTE 5 OIL AND GAS PRODUC (24)! NOTE 5 OIL AND GAS PRODUC (25)! 16 PAGE 473 NOTE 6 RELATED PAR! 16 PAGE 473 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (21) NOTE 7 OIL AND GAS INFORM (22) NOTE 7 OIL AND GAS INFORM (23)!18 PAGE 475 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (7)Beneficial Ownership (7)PARKER PARSLEY 86A LTD (1)INDEX TO EXHIBITS (7)SELECTED FINANCIAL DATA (12) SUPPLEMENTAL INFORMATION (13)PARKER PARSLEY 86B LTD ITEM 6 SELECTED FINANCIAL (8)INDEX TO FINANCIAL STATEM (7)Balance Sheet (13)Income Statement (14) STATEMENTS OF PARTNERS CA (13)Cash Flows (14)!16 PAGE 503 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (26)! NOTE 5 OIL AND GAS PRODUC (27)! NOTE 6 RELATED PARTY TRANS (4)! NOTE 6 RELATED PARTY TRANS (5) NOTE 7 OIL AND GAS INFORM (24) NOTE 7 OIL AND GAS INFORM (25) NOTE 7 OIL AND GAS INFORM (26)!19 PAGE 506 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (8)Beneficial Ownership (8)PARKER PARSLEY 86B LTD (1)INDEX TO EXHIBITS (8)SELECTED FINANCIAL DATA (13) SUPPLEMENTAL INFORMATION (14) ITEM 6 SELECTED FINANCIAL (9)!7 PAGE 525 ITEM 8 FINANCIAL STABalance Sheet (14)Income Statement (15) STATEMENTS OF PARTNERS CA (14)Cash Flows (15)NOTE 4 INCOME TAXES (9)! NOTE 5 OIL AND GAS PRODUC (28)! NOTE 5 OIL AND GAS PRODUC (29)! 16 PAGE 534 NOTE 6 RELATED PAR! 16 PAGE 534 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (27) NOTE 7 OIL AND GAS INFORM (28) NOTE 7 OIL AND GAS INFORM (29)!18 PAGE 536 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (9)Beneficial Ownership (9)PARKER PARSLEY 86C LTDSELECTED FINANCIAL DATA (14) SUPPLEMENTAL INFORMATION (15)Balance Sheet (15)Income Statement (16) STATEMENTS OF PARTNERS CA (15)Cash Flows (16) 8 PAGE 556 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (30)! NOTE 5 OIL AND GAS PRODUC (31)! NOTE 6 RELATED PARTY TRANS (6)! NOTE 6 RELATED PARTY TRANS (7) NOTE 7 OIL AND GAS INFORM (30) NOTE 7 OIL AND GAS INFORM (31) NOTE 7 OIL AND GAS INFORM (32)! 11 PAGE 559 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (15) SUPPLEMENTAL INFORMATION (16)Balance Sheet (16)Income Statement (17) STATEMENTS OF PARTNERS CA (16)Cash Flows (17)NOTE 4 INCOME TAXES (10)! NOTE 5 OIL AND GAS PRODUC (32)! NOTE 5 OIL AND GAS PRODUC (33)! 9 PAGE 576 NOTE 6 RELATED PART! 9 PAGE 576 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (33) NOTE 7 OIL AND GAS INFORM (34) NOTE 7 OIL AND GAS INFORM (35)!11 PAGE 578 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (16) SUPPLEMENTAL INFORMATION (17) ITEM 6 SELECTED FINANCIAL (10)!8 PAGE 594 ITEM 8 FINANCIAL STABalance Sheet (17)Income Statement (18) STATEMENTS OF PARTNERS CA (17)Cash Flows (18)NOTE 4 INCOME TAXES (11)! NOTE 5 OIL AND GAS PRODUC (34)! NOTE 5 OIL AND GAS PRODUC (35)! 17 PAGE 603 NOTE 6 RELATED PAR! 17 PAGE 603 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (36) NOTE 7 OIL AND GAS INFORM (37) NOTE 7 OIL AND GAS INFORM (38)! 19 PAGE 605 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (10)Beneficial Ownership (10)PARKER PARSLEY 87A LTDSELECTED FINANCIAL DATA (17) SUPPLEMENTAL INFORMATION (18)Balance Sheet (18)Income Statement (19) STATEMENTS OF PARTNERS CA (18)Cash Flows (19) 8 PAGE 625 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (36)! NOTE 5 OIL AND GAS PRODUC (37)! 9 PAGE 626 NOTE 6 RELATED PART! 9 PAGE 626 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (39) NOTE 7 OIL AND GAS INFORM (40) NOTE 7 OIL AND GAS INFORM (41)! 11 PAGE 628 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (18) SUPPLEMENTAL INFORMATION (19) ITEM 6 SELECTED FINANCIAL (11)INDEX TO FINANCIAL STATEM (8)Balance Sheet (19)Income Statement (20) STATEMENTS OF PARTNERS CA (19)Cash Flows (20)NOTE 4 INCOME TAXES (12)! NOTE 5 OIL AND GAS PRODUC (38)! NOTE 5 OIL AND GAS PRODUC (39)! 17 PAGE 653 NOTE 6 RELATED PAR! 17 PAGE 653 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (42) NOTE 7 OIL AND GAS INFORM (43) NOTE 7 OIL AND GAS INFORM (44)! 19 PAGE 655 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (11)Beneficial Ownership (11)PARKER PARSLEY 87B LTDINDEX TO EXHIBITS (9)SELECTED FINANCIAL DATA (19) SUPPLEMENTAL INFORMATION (20) ITEM 6 SELECTED FINANCIAL (12)INDEX TO FINANCIAL STATEM (9)Balance Sheet (20)Income Statement (21) STATEMENTS OF PARTNERS CA (20)Cash Flows (21)!16 PAGE 683 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (40)! NOTE 5 OIL AND GAS PRODUC (41)! NOTE 6 RELATED PARTY TRANS (8)! NOTE 6 RELATED PARTY TRANS (9) NOTE 7 OIL AND GAS INFORM (45) NOTE 7 OIL AND GAS INFORM (46) NOTE 7 OIL AND GAS INFORM (47)!19 PAGE 686 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (12)Beneficial Ownership (12)PROPERTIES 87A LTDINDEX TO EXHIBITS (10)SELECTED FINANCIAL DATA (20) SUPPLEMENTAL INFORMATION (21) ITEM 6 SELECTED FINANCIAL (13)INDEX TO FINANCIAL STATE (10)Balance Sheet (21)Income Statement (22) STATEMENTS OF PARTNERS CA (21)Cash Flows (22)!16 PAGE 714 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (42)! NOTE 5 OIL AND GAS PRODUC (43)! 17 PAGE 715 NOTE 6 RELATED PAR! 17 PAGE 715 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (48) NOTE 7 OIL AND GAS INFORM (49) NOTE 7 OIL AND GAS INFORM (50)! 19 PAGE 717 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (13)Beneficial Ownership (13)PROPERTIES 87B LTDINDEX TO EXHIBITS (11)SELECTED FINANCIAL DATA (21) SUPPLEMENTAL INFORMATION (22)Balance Sheet (22)Income Statement (23) STATEMENTS OF PARTNERS CA (22)Cash Flows (23) 8 PAGE 737 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (44)! NOTE 5 OIL AND GAS PRODUC (45)! 9 PAGE 738 NOTE 6 RELATED PART! 9 PAGE 738 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (51) NOTE 7 OIL AND GAS INFORM (52) NOTE 7 OIL AND GAS INFORM (53)! 11 PAGE 740 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (22) SUPPLEMENTAL INFORMATION (23)Balance Sheet (23)Income Statement (24) STATEMENTS OF PARTNERS CA (23)Cash Flows (24) 8 PAGE 756 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (46)! NOTE 5 OIL AND GAS PRODUC (47)! 9 PAGE 757 NOTE 6 RELATED PART! 9 PAGE 757 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (54) NOTE 7 OIL AND GAS INFORM (55) NOTE 7 OIL AND GAS INFORM (56)! 11 PAGE 759 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (23)!31 2000 1 PAGE 766 PARKER PARSLPARKER PARSLEY 88A LP ITEM 6 SELECTED FINANCIAL (14)INDEX TO FINANCIAL STATE (11)Balance Sheet (24)Income Statement (25) STATEMENTS OF PARTNERS CA (24)Cash Flows (25)NOTE 4 INCOME TAXES (13)! NOTE 5 OIL AND GAS PRODUC (48)! NOTE 5 OIL AND GAS PRODUC (49)! 16 PAGE 783 NOTE 6 RELATED PAR! 16 PAGE 783 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (57) NOTE 7 OIL AND GAS INFORM (58) NOTE 7 OIL AND GAS INFORM (59)! 18 PAGE 785 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (14)Beneficial Ownership (14)PARKER PARSLEY 88A LP (1)INDEX TO EXHIBITS (12)SELECTED FINANCIAL DATA (24) SUPPLEMENTAL INFORMATION (24)Balance Sheet (25)Income Statement (26) STATEMENTS OF PARTNERS CA (25)Cash Flows (26) 8 PAGE 805 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (50)! NOTE 5 OIL AND GAS PRODUC (51)! 9 PAGE 806 NOTE 6 RELATED PART! 9 PAGE 806 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (60) NOTE 7 OIL AND GAS INFORM (61) NOTE 7 OIL AND GAS INFORM (62)! 11 PAGE 808 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (25)!31 2000 1 PAGE 815 PARKER PARSLPARKER PARSLEY 88B LP ITEM 6 SELECTED FINANCIAL (15)INDEX TO FINANCIAL STATE (12)Balance Sheet (26)Income Statement (27) STATEMENTS OF PARTNERS CA (26)Cash Flows (27)!16 PAGE 832 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (52)! NOTE 5 OIL AND GAS PRODUC (53)! 17 PAGE 833 NOTE 6 RELATED PAR! 17 PAGE 833 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (63) NOTE 7 OIL AND GAS INFORM (64) NOTE 7 OIL AND GAS INFORM (65)! 19 PAGE 835 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (15)Beneficial Ownership (15)PARKER PARSLEY 88B LP (1)INDEX TO EXHIBITS (13)SELECTED FINANCIAL DATA (26) SUPPLEMENTAL INFORMATION (25)Balance Sheet (27)Income Statement (28) STATEMENTS OF PARTNERS CA (27)Cash Flows (28) 8 PAGE 855 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (54)! NOTE 5 OIL AND GAS PRODUC (55)! 9 PAGE 856 NOTE 6 RELATED PART! 9 PAGE 856 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (66) NOTE 7 OIL AND GAS INFORM (67) NOTE 7 OIL AND GAS INFORM (68)! 11 PAGE 858 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (27)!31 2000 1 PAGE 865 PARKER PARSLBalance Sheet (28)Income Statement (29) STATEMENTS OF PARTNERS CA (28)Cash Flows (29) 8 PAGE 874 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (56)! NOTE 5 OIL AND GAS PRODUC (57)! 9 PAGE 875 NOTE 6 RELATED PART! 9 PAGE 875 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (69) NOTE 7 OIL AND GAS INFORM (70) NOTE 7 OIL AND GAS INFORM (71)! 11 PAGE 877 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (28) SUPPLEMENTAL INFORMATION (26)!PARKER PARSLEY PRODUCING PROPER ITEM 6 SELECTED FINANCIAL (16)INDEX TO FINANCIAL STATE (13)Balance Sheet (29)Income Statement (30) STATEMENTS OF PARTNERS CA (29)Cash Flows (30)NOTE 4 INCOME TAXES (14)! NOTE 5 OIL AND GAS PRODUC (58)! NOTE 5 OIL AND GAS PRODUC (59)! 16 PAGE 901 NOTE 6 RELATED PAR! 16 PAGE 901 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (72) NOTE 7 OIL AND GAS INFORM (73)!18 PAGE 903 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (16)Beneficial Ownership (16)PROPERTIES 88A LPINDEX TO EXHIBITS (14)SELECTED FINANCIAL DATA (29) SUPPLEMENTAL INFORMATION (27)Balance Sheet (30)Income Statement (31) STATEMENTS OF PARTNERS CA (30)Cash Flows (31)NOTE 4 INCOME TAXES (15)! NOTE 5 OIL AND GAS PRODUC (60)! NOTE 5 OIL AND GAS PRODUC (61)! 9 PAGE 924 NOTE 6 RELATED PART! 9 PAGE 924 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (74) NOTE 7 OIL AND GAS INFORM (75) NOTE 7 OIL AND GAS INFORM (76)! 11 PAGE 926 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (30) SUPPLEMENTAL INFORMATION (28)Balance Sheet (31)Income Statement (32) STATEMENTS OF PARTNERS CA (31)Cash Flows (32)NOTE 4 INCOME TAXES (16)! NOTE 5 OIL AND GAS PRODUC (62)! NOTE 5 OIL AND GAS PRODUC (63)! 9 PAGE 943 NOTE 6 RELATED PART! 9 PAGE 943 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (77) NOTE 7 OIL AND GAS INFORM (78) NOTE 7 OIL AND GAS INFORM (79)!11 PAGE 945 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (31)!31 2000 1 PAGE 952 PARKER PARSLPARKER PARSLEY 89A LP ITEM 6 SELECTED FINANCIAL (17)INDEX TO FINANCIAL STATE (14)Balance Sheet (32)Income Statement (33) STATEMENTS OF PARTNERS CA (32)Cash Flows (33)NOTE 4 INCOME TAXES (17)! NOTE 5 OIL AND GAS PRODUC (64)! NOTE 5 OIL AND GAS PRODUC (65)! 16 PAGE 969 NOTE 6 RELATED PAR! 16 PAGE 969 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (80) NOTE 7 OIL AND GAS INFORM (81) NOTE 7 OIL AND GAS INFORM (82) NOTE 7 OIL AND GAS INFORM (83)! 18 PAGE 971 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (17)Beneficial Ownership (17)PARKER PARSLEY 89A LP (1)INDEX TO EXHIBITS (15)SELECTED FINANCIAL DATA (32) SUPPLEMENTAL INFORMATION (29)Balance Sheet (33)Income Statement (34) STATEMENTS OF PARTNERS CA (33)Cash Flows (34) 8 PAGE 991 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (66)! NOTE 5 OIL AND GAS PRODUC (67)! 9 PAGE 992 NOTE 6 RELATED PART! 9 PAGE 992 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (84) NOTE 7 OIL AND GAS INFORM (85) NOTE 7 OIL AND GAS INFORM (86)! 11 PAGE 994 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (33)!31 2000 1 PAGE 1001 PARKER PARSBalance Sheet (34)Income Statement (35) STATEMENTS OF PARTNERS CA (34)Cash Flows (35)!8 PAGE 1010 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (68)! NOTE 5 OIL AND GAS PRODUC (69)! 9 PAGE 1011 NOTE 6 RELATED PAR! 9 PAGE 1011 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (87) NOTE 7 OIL AND GAS INFORM (88) NOTE 7 OIL AND GAS INFORM (89)!11 PAGE 1013 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (34) SUPPLEMENTAL INFORMATION (30)Balance Sheet (35)Income Statement (36) STATEMENTS OF PARTNERS CA (35)Cash Flows (36)!8 PAGE 1029 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (70)! NOTE 5 OIL AND GAS PRODUC (71)! 9 PAGE 1030 NOTE 6 RELATED PAR! 9 PAGE 1030 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (90) NOTE 7 OIL AND GAS INFORM (91) NOTE 7 OIL AND GAS INFORM (92)! 11 PAGE 1032 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (35) SUPPLEMENTAL INFORMATION (31)Balance Sheet (36)Income Statement (37) STATEMENTS OF PARTNERS CA (36)Cash Flows (37)!8 PAGE 1048 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (72)! NOTE 5 OIL AND GAS PRODUC (73)! 9 PAGE 1049 NOTE 6 RELATED PAR! 9 PAGE 1049 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (93) NOTE 7 OIL AND GAS INFORM (94) NOTE 7 OIL AND GAS INFORM (95)! 11 PAGE 1051 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (36)!31 2000 1 PAGE 1058 PARKER PARSPARKER PARSLEY 90A LP ITEM 6 SELECTED FINANCIAL (18)INDEX TO FINANCIAL STATE (15)Balance Sheet (37)Income Statement (38) STATEMENTS OF PARTNERS CA (37)Cash Flows (38)!15 PAGE 1074 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (74)! NOTE 5 OIL AND GAS PRODUC (75)! NOTE 6 RELATED PARTY TRAN (10)! NOTE 6 RELATED PARTY TRAN (11) NOTE 7 OIL AND GAS INFORM (96) NOTE 7 OIL AND GAS INFORM (97)! 18 PAGE 1077 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (18)Beneficial Ownership (18)PARKER PARSLEY 90A LP (1)INDEX TO EXHIBITS (16)SELECTED FINANCIAL DATA (37) SUPPLEMENTAL INFORMATION (32)PARKER PARSLEY 90B CONV LP ITEM 6 SELECTED FINANCIAL (19)INDEX TO FINANCIAL STATE (16)Balance Sheet (38)Income Statement (39) STATEMENTS OF PARTNERS CA (38)Cash Flows (39)!16 PAGE 1105 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (76)! NOTE 5 OIL AND GAS PRODUC (77)! NOTE 6 RELATED PARTY TRAN (12)! NOTE 6 RELATED PARTY TRAN (13) NOTE 7 OIL AND GAS INFORM (98) NOTE 7 OIL AND GAS INFORM (99) NOTE 7 OIL AND GAS INFOR (100)! 19 PAGE 1108 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (19)Beneficial Ownership (19) PARKER PARSLEY 90B CONV LP (1)INDEX TO EXHIBITS (17)SELECTED FINANCIAL DATA (38)!31 2000 1 PAGE 1119 PARKER PARSPARKER PARSLEY 90B LP ITEM 6 SELECTED FINANCIAL (20)INDEX TO FINANCIAL STATE (17)Balance Sheet (39)Income Statement (40) STATEMENTS OF PARTNERS CA (39)Cash Flows (40)!16 PAGE 1136 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (78)! NOTE 5 OIL AND GAS PRODUC (79)! NOTE 6 RELATED PARTY TRAN (14)! NOTE 6 RELATED PARTY TRAN (15) NOTE 7 OIL AND GAS INFOR (101) NOTE 7 OIL AND GAS INFOR (102) NOTE 7 OIL AND GAS INFOR (103)! 19 PAGE 1139 NOTE 8 MAJOR CUS!ITEM 10 DIRECTORS AND EXEC (20)Beneficial Ownership (20)PARKER PARSLEY 90B LP (1)INDEX TO EXHIBITS (18)SELECTED FINANCIAL DATA (39) SUPPLEMENTAL INFORMATION (33)PARKER PARSLEY 90C CONV LP ITEM 6 SELECTED FINANCIAL (21)INDEX TO FINANCIAL STATE (18)Balance Sheet (40)Income Statement (41) STATEMENTS OF PARTNERS CA (40)Cash Flows (41)!15 PAGE 1166 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (80)! NOTE 5 OIL AND GAS PRODUC (81)! NOTE 6 RELATED PARTY TRAN (16)! NOTE 6 RELATED PARTY TRAN (17) NOTE 7 OIL AND GAS INFOR (104) NOTE 7 OIL AND GAS INFOR (105) NOTE 7 OIL AND GAS INFOR (106)! 18 PAGE 1169 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (21)Beneficial Ownership (21) PARKER PARSLEY 90C CONV LP (1)INDEX TO EXHIBITS (19)SELECTED FINANCIAL DATA (40)!31 2000 1 PAGE 1180 PARKER PARSPARKER PARSLEY 90C LP ITEM 6 SELECTED FINANCIAL (22)INDEX TO FINANCIAL STATE (19)Balance Sheet (41)Income Statement (42) STATEMENTS OF PARTNERS CA (41)Cash Flows (42)!15 PAGE 1196 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (82)! NOTE 5 OIL AND GAS PRODUC (83)! NOTE 6 RELATED PARTY TRAN (18)! NOTE 6 RELATED PARTY TRAN (19) NOTE 7 OIL AND GAS INFOR (107) NOTE 7 OIL AND GAS INFOR (108) NOTE 7 OIL AND GAS INFOR (109)! 18 PAGE 1199 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (22)Beneficial Ownership (22)PARKER PARSLEY 90C LP (1)INDEX TO EXHIBITS (20)SELECTED FINANCIAL DATA (41) SUPPLEMENTAL INFORMATION (34)Balance Sheet (42)Income Statement (43) STATEMENTS OF PARTNERS CA (42)Cash Flows (43)!8 PAGE 1219 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (84)! NOTE 5 OIL AND GAS PRODUC (85)! 9 PAGE 1220 NOTE 6 RELATED PAR! 9 PAGE 1220 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (110) NOTE 7 OIL AND GAS INFOR (111) NOTE 7 OIL AND GAS INFOR (112)! 11 PAGE 1222 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (42) SUPPLEMENTAL INFORMATION (35)Balance Sheet (43)Income Statement (44) STATEMENTS OF PARTNERS CA (43)Cash Flows (44)!8 PAGE 1238 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (86)! NOTE 5 OIL AND GAS PRODUC (87)! 9 PAGE 1239 NOTE 6 RELATED PAR! 9 PAGE 1239 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (113) NOTE 7 OIL AND GAS INFOR (114) NOTE 7 OIL AND GAS INFOR (115)! 11 PAGE 1241 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (43)!31 2000 1 PAGE 1248 PARKER PARSPARKER PARSLEY 91A LP ITEM 6 SELECTED FINANCIAL (23)INDEX TO FINANCIAL STATE (20)Balance Sheet (44)Income Statement (45) STATEMENTS OF PARTNERS CA (44)Cash Flows (45)!15 PAGE 1264 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (88)! NOTE 5 OIL AND GAS PRODUC (89)! NOTE 6 RELATED PARTY TRAN (20)! NOTE 6 RELATED PARTY TRAN (21) NOTE 7 OIL AND GAS INFOR (116) NOTE 7 OIL AND GAS INFOR (117) NOTE 7 OIL AND GAS INFOR (118)! 18 PAGE 1267 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (23)Beneficial Ownership (23)PARKER PARSLEY 91A LP (1)INDEX TO EXHIBITS (21)SELECTED FINANCIAL DATA (44)!31 2000 1 PAGE 1278 PARKER PARSPARKER PARSLEY 91B LP ITEM 6 SELECTED FINANCIAL (24)INDEX TO FINANCIAL STATE (21)Balance Sheet (45)Income Statement (46) STATEMENTS OF PARTNERS CA (45)Cash Flows (46)!15 PAGE 1294 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (90)! NOTE 5 OIL AND GAS PRODUC (91)! NOTE 6 RELATED PARTY TRAN (22)! NOTE 6 RELATED PARTY TRAN (23) NOTE 7 OIL AND GAS INFOR (119) NOTE 7 OIL AND GAS INFOR (120) NOTE 7 OIL AND GAS INFOR (121)! 18 PAGE 1297 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (24)Beneficial Ownership (24)PARKER PARSLEY 91B LP (1)INDEX TO EXHIBITS (22)SELECTED FINANCIAL DATA (45)POWER OF ATTORNEYPOWER OF ATTORNEY (1)POWER OF ATTORNEY (2)POWER OF ATTORNEY (3)POWER OF ATTORNEY (4)POWER OF ATTORNEY (5)POWER OF ATTORNEY (6)POWER OF ATTORNEY (7)!2001 THE BOARD OF DIRECTORS REC!2001 THE BOARD OF DIRECTORS (1)!2001 THE BOARD OF DIRECTORS (2)PAGE 2U } Y}  3    $PIONEER NATURAL RESOURCES CO S-4 04/17/2001Income Statement   PRO FORMA   YEAR ENDED  DECEMBER 31, 2000 (IN THOUSANDS EXCEPTPER SHARE DATA)!STATEMENTS OF OPERATIONS: Revenues: Oil and gas~ 7# Interest and other~ ޙ3+ Gain on disposition of assets, net~ ~ ڷ:  Costs and Expenses:' Oil and gas production~ W 91 Depletion, depreciation and amortization~ ڋ-% Exploration and abandonments~ Y+# General and administrative~ Zw Interest~   Other~ ~Dlsg[:xS9 y_;x; !"#$%&'()*+,-./012 ~ /!!B": Income from continuing operations before income taxes~ " # Income tax benefit~ #]$$.%& Income from continuing operations~ %H &&R'J Income from continuing operations per common share, basic and diluted'{Gz?:(2 Weighted average number of shares outstanding~ (zS*)"BALANCE SHEET DATA (AT PERIOD END)/*' Property, plant and equipment, net~ *>+ Total assets~ +걺, Long-term debt~ , b!- Stockholders' equity~ -;./$0____________________________11)Created by Morningstar Document Research.02(http://documentresearch.morningstar.com/*hzI1q%^+=PF0*8X> @221100 l  0 dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/?? SECURITIES AND EXC!CALCULATION OF REGISTRATION FEETO BE HELD ON 2001TABLE OF CONTENTSPAGE 7 LIST OF APPENDICES!LIMITED PARTNER INVESTMENT REPA!LIMITED PARTNER INVESTMENT (1) 5 PAGE 15 NYMEX FUTURES PRICES!EXAMPLE CALCULATION OF MERGER VIncome StatementIncome Statement (1)!15 PAGE 25 COMPARATIVE PER SHAR!25 PAGE 35 REASONS FOR THE MERGFAIRNESS OPINIONFAIRNESS OPINION (1)!LEGAL OPINION FOR LIMITED PARTN!LEGAL OPINION FOR LIMITED P (1)!NONMANAGING GENERAL PARTNERS OF!49 PAGE 59 PAYMENT OF EXPENSES !58 PAGE 68 COMPARATIVE PER SHAR!60 PAGE 70 OWNERSHIP OF PARTNER PIONEER PIONEER USATHE DRILLING PARTNERSHIPSTHE DRILLING PARTNERSHIPS (1)THE INCOME PARTNERSHIPS INTERESTSINTERESTS (1)INTERESTS (2)INTERESTS (3)INTERESTS (4)INTERESTS (5)!WHERE YOU CAN FIND MORE INFORMAAS OF DECEMBER 31 2000YEAR ENDED DECEMBER 31 2000!QUANTITIES OF OIL AND GAS RESER!STANDARDIZED MEASURE OF DISCOUN CASH FLOWSAS OF MARCH 31 2001AS OF MARCH 31 2001 (1)AS OF MARCH 31 2001 (2)AS OF MARCH 31 2001 (3)AS OF MARCH 31 2001 (4)AS OF MARCH 31 2001 (5)!FROM INCEPTION THROUGH MARCH 31!ANNUAL REPURCHASE PRICES AND AGOF EACH PARTNERSHIP!FOR THE THREE MONTHS ENDED MARCAS OF DECEMBER 31 2000 (1)AS OF MARCH 31 2001 (6)!THE YEARS ENDED DECEMBER 31 200AS OF DECEMBER 31 2000 (2)DECEMBER 31 2000 AND 1999EFFECTIVE DECEMBER 31 2000 EFFECTIVE DECEMBER 31 2000 (1) RECITALS RECITALS (1) SUPPLEMENTAL INFORMATION TABLEBalance SheetIncome Statement (2) STATEMENTS OF PARTNERS CAPITALCash Flows (1)NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCING A! NOTE 5 OIL AND GAS PRODUCI (1)! NOTE 6 RELATED PARTY TRANSACTI! NOTE 6 RELATED PARTY TRANS (1)! NOTE 7 OIL AND GAS INFORMATION! NOTE 7 OIL AND GAS INFORMA (1)! NOTE 7 OIL AND GAS INFORMA (2)!11 PAGE 163 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA SUPPLEMENTAL INFORMATION T (1)Balance Sheet (1)Income Statement (3) STATEMENTS OF PARTNERS CAP (1)Cash Flows (2)NOTE 4 INCOME TAXES (1)! NOTE 5 OIL AND GAS PRODUCI (2)! NOTE 5 OIL AND GAS PRODUCI (3)! 9 PAGE 180 NOTE 6 RELATED PAR! 9 PAGE 180 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORMA (3)! NOTE 7 OIL AND GAS INFORMA (4)! NOTE 7 OIL AND GAS INFORMA (5)!11 PAGE 182 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (1) SUPPLEMENTAL INFORMATION T (2) ITEM 6 SELECTED FINANCIAL DATAINDEX TO FINANCIAL STATEMENTSBalance Sheet (2)Income Statement (4) STATEMENTS OF PARTNERS CAP (2)Cash Flows (3)!15 PAGE 205 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCI (4)! NOTE 5 OIL AND GAS PRODUCI (5)! NOTE 6 RELATED PARTY TRANS (2)! NOTE 6 RELATED PARTY TRANS (3)! NOTE 7 OIL AND GAS INFORMA (6)! NOTE 7 OIL AND GAS INFORMA (7)! NOTE 7 OIL AND GAS INFORMA (8)! NOTE 7 OIL AND GAS INFORMA (9)! NOTE 7 OIL AND GAS INFORM (10)! 18 PAGE 208 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECUTIVEBeneficial OwnershipPARKER PARSLEY 82I LTDINDEX TO EXHIBITSSELECTED FINANCIAL DATA (2) SUPPLEMENTAL INFORMATION T (3) ITEM 6 SELECTED FINANCIAL (1)INDEX TO FINANCIAL STATEM (1)Balance Sheet (3)Income Statement (5) STATEMENTS OF PARTNERS CAP (3)Cash Flows (4)NOTE 4 INCOME TAXES (2)! NOTE 5 OIL AND GAS PRODUCI (6)! NOTE 5 OIL AND GAS PRODUCI (7)! 16 PAGE 236 NOTE 6 RELATED PAR! 16 PAGE 236 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (11)! NOTE 7 OIL AND GAS INFORM (12)! NOTE 7 OIL AND GAS INFORM (13)!18 PAGE 238 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (1)Beneficial Ownership (1)PARKER PARSLEY 82II LTDINDEX TO EXHIBITS (1)SELECTED FINANCIAL DATA (3) SUPPLEMENTAL INFORMATION T (4)Balance Sheet (4)Income Statement (6) STATEMENTS OF PARTNERS CAP (4)Cash Flows (5)NOTE 4 INCOME TAXES (3)! NOTE 5 OIL AND GAS PRODUCI (8)! NOTE 5 OIL AND GAS PRODUCI (9)! 9 PAGE 259 NOTE 6 RELATED PART! 9 PAGE 259 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (14)! NOTE 7 OIL AND GAS INFORM (15)! NOTE 7 OIL AND GAS INFORM (16)!11 PAGE 261 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (4) SUPPLEMENTAL INFORMATION T (5)PARKER PARSLEY 83A LTD ITEM 6 SELECTED FINANCIAL (2)INDEX TO FINANCIAL STATEM (2)Balance Sheet (5)Income Statement (7) STATEMENTS OF PARTNERS CAP (5)Cash Flows (6)NOTE 4 INCOME TAXES (4)! NOTE 5 OIL AND GAS PRODUC (10)! NOTE 5 OIL AND GAS PRODUC (11)! 16 PAGE 285 NOTE 6 RELATED PAR! 16 PAGE 285 NOTE 6 RELATED (1)!NOTE 7 OIL AND GAS INFORMATION  NOTE 7 OIL AND GAS INFORMA (1) NOTE 7 OIL AND GAS INFORMA (2)! 18 PAGE 287 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECU (2)Beneficial Ownership (2)PARKER PARSLEY 83A LTD (1)INDEX TO EXHIBITS (2)SELECTED FINANCIAL DATA (5) SUPPLEMENTAL INFORMATION T (6)PARKER PARSLEY 83B LTD ITEM 6 SELECTED FINANCIAL (3)INDEX TO FINANCIAL STATEM (3)Balance Sheet (6)Income Statement (8) STATEMENTS OF PARTNERS CAP (6)Cash Flows (7)NOTE 4 INCOME TAXES (5)! NOTE 5 OIL AND GAS PRODUC (12)! NOTE 5 OIL AND GAS PRODUC (13)! 16 PAGE 315 NOTE 6 RELATED PAR! 16 PAGE 315 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (3) NOTE 7 OIL AND GAS INFORMA (4) NOTE 7 OIL AND GAS INFORMA (5)!18 PAGE 317 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (3)Beneficial Ownership (3)PARKER PARSLEY 83B LTD (1)INDEX TO EXHIBITS (3)SELECTED FINANCIAL DATA (6) SUPPLEMENTAL INFORMATION T (7)PARKER PARSLEY 84A LTD ITEM 6 SELECTED FINANCIAL (4)INDEX TO FINANCIAL STATEM (4)Balance Sheet (7)Income Statement (9) STATEMENTS OF PARTNERS CAP (7)Cash Flows (8)!15 PAGE 344 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (14)! NOTE 5 OIL AND GAS PRODUC (15)! 16 PAGE 345 NOTE 6 RELATED PAR! 16 PAGE 345 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (6) NOTE 7 OIL AND GAS INFORMA (7) NOTE 7 OIL AND GAS INFORMA (8)!18 PAGE 347 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (4)Beneficial Ownership (4)PARKER PARSLEY 84A LTD (1)INDEX TO EXHIBITS (4)SELECTED FINANCIAL DATA (7) SUPPLEMENTAL INFORMATION T (8)PARKER PARSLEY 85A LTD ITEM 6 SELECTED FINANCIAL (5)INDEX TO FINANCIAL STATEM (5)Balance Sheet (8)Income Statement (10) STATEMENTS OF PARTNERS CAP (8)Cash Flows (9)NOTE 4 INCOME TAXES (6)! NOTE 5 OIL AND GAS PRODUC (16)! NOTE 5 OIL AND GAS PRODUC (17)! 16 PAGE 375 NOTE 6 RELATED PAR! 16 PAGE 375 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (9) NOTE 7 OIL AND GAS INFORM (10) NOTE 7 OIL AND GAS INFORM (11)!18 PAGE 377 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (5)Beneficial Ownership (5)PARKER PARSLEY 85A LTD (1)INDEX TO EXHIBITS (5)SELECTED FINANCIAL DATA (8) SUPPLEMENTAL INFORMATION T (9)PARKER PARSLEY 85B LTD ITEM 6 SELECTED FINANCIAL (6)!7 PAGE 396 ITEM 8 FINANCIAL STABalance Sheet (9) STATEMENTS OF PARTNERS CAP (9)Cash Flows (10)!15 PAGE 404 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (18)! NOTE 5 OIL AND GAS PRODUC (19)! 16 PAGE 405 NOTE 6 RELATED PAR! 16 PAGE 405 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (12) NOTE 7 OIL AND GAS INFORM (13) NOTE 7 OIL AND GAS INFORM (14)!18 PAGE 407 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (6)Beneficial Ownership (6)PARKER PARSLEY 85B LTD (1)INDEX TO EXHIBITS (6)SELECTED FINANCIAL DATA (9) SUPPLEMENTAL INFORMATION (10)Balance Sheet (10)Income Statement (11) STATEMENTS OF PARTNERS CA (10)Cash Flows (11)NOTE 4 INCOME TAXES (7)! NOTE 5 OIL AND GAS PRODUC (20)! NOTE 5 OIL AND GAS PRODUC (21)! 9 PAGE 428 NOTE 6 RELATED PART! 9 PAGE 428 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (15) NOTE 7 OIL AND GAS INFORM (16) NOTE 7 OIL AND GAS INFORM (17)! 11 PAGE 430 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (10) SUPPLEMENTAL INFORMATION (11)Balance Sheet (11)Income Statement (12) STATEMENTS OF PARTNERS CA (11)Cash Flows (12) 8 PAGE 446 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (22)! NOTE 5 OIL AND GAS PRODUC (23)! 9 PAGE 447 NOTE 6 RELATED PART! 9 PAGE 447 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (18) NOTE 7 OIL AND GAS INFORM (19) NOTE 7 OIL AND GAS INFORM (20)! 11 PAGE 449 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (11) SUPPLEMENTAL INFORMATION (12)PARKER PARSLEY 86A LTD ITEM 6 SELECTED FINANCIAL (7)INDEX TO FINANCIAL STATEM (6)Balance Sheet (12)Income Statement (13) STATEMENTS OF PARTNERS CA (12)Cash Flows (13)NOTE 4 INCOME TAXES (8)! NOTE 5 OIL AND GAS PRODUC (24)! NOTE 5 OIL AND GAS PRODUC (25)! 16 PAGE 473 NOTE 6 RELATED PAR! 16 PAGE 473 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (21) NOTE 7 OIL AND GAS INFORM (22) NOTE 7 OIL AND GAS INFORM (23)!18 PAGE 475 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (7)Beneficial Ownership (7)PARKER PARSLEY 86A LTD (1)INDEX TO EXHIBITS (7)SELECTED FINANCIAL DATA (12) SUPPLEMENTAL INFORMATION (13)PARKER PARSLEY 86B LTD ITEM 6 SELECTED FINANCIAL (8)INDEX TO FINANCIAL STATEM (7)Balance Sheet (13)Income Statement (14) STATEMENTS OF PARTNERS CA (13)Cash Flows (14)!16 PAGE 503 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (26)! NOTE 5 OIL AND GAS PRODUC (27)! NOTE 6 RELATED PARTY TRANS (4)! NOTE 6 RELATED PARTY TRANS (5) NOTE 7 OIL AND GAS INFORM (24) NOTE 7 OIL AND GAS INFORM (25) NOTE 7 OIL AND GAS INFORM (26)!19 PAGE 506 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (8)Beneficial Ownership (8)PARKER PARSLEY 86B LTD (1)INDEX TO EXHIBITS (8)SELECTED FINANCIAL DATA (13) SUPPLEMENTAL INFORMATION (14) ITEM 6 SELECTED FINANCIAL (9)!7 PAGE 525 ITEM 8 FINANCIAL STABalance Sheet (14)Income Statement (15) STATEMENTS OF PARTNERS CA (14)Cash Flows (15)NOTE 4 INCOME TAXES (9)! NOTE 5 OIL AND GAS PRODUC (28)! NOTE 5 OIL AND GAS PRODUC (29)! 16 PAGE 534 NOTE 6 RELATED PAR! 16 PAGE 534 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (27) NOTE 7 OIL AND GAS INFORM (28) NOTE 7 OIL AND GAS INFORM (29)!18 PAGE 536 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (9)Beneficial Ownership (9)PARKER PARSLEY 86C LTDSELECTED FINANCIAL DATA (14) SUPPLEMENTAL INFORMATION (15)Balance Sheet (15)Income Statement (16) STATEMENTS OF PARTNERS CA (15)Cash Flows (16) 8 PAGE 556 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (30)! NOTE 5 OIL AND GAS PRODUC (31)! NOTE 6 RELATED PARTY TRANS (6)! NOTE 6 RELATED PARTY TRANS (7) NOTE 7 OIL AND GAS INFORM (30) NOTE 7 OIL AND GAS INFORM (31) NOTE 7 OIL AND GAS INFORM (32)! 11 PAGE 559 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (15) SUPPLEMENTAL INFORMATION (16)Balance Sheet (16)Income Statement (17) STATEMENTS OF PARTNERS CA (16)Cash Flows (17)NOTE 4 INCOME TAXES (10)! NOTE 5 OIL AND GAS PRODUC (32)! NOTE 5 OIL AND GAS PRODUC (33)! 9 PAGE 576 NOTE 6 RELATED PART! 9 PAGE 576 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (33) NOTE 7 OIL AND GAS INFORM (34) NOTE 7 OIL AND GAS INFORM (35)!11 PAGE 578 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (16) SUPPLEMENTAL INFORMATION (17) ITEM 6 SELECTED FINANCIAL (10)!8 PAGE 594 ITEM 8 FINANCIAL STABalance Sheet (17)Income Statement (18) STATEMENTS OF PARTNERS CA (17)Cash Flows (18)NOTE 4 INCOME TAXES (11)! NOTE 5 OIL AND GAS PRODUC (34)! NOTE 5 OIL AND GAS PRODUC (35)! 17 PAGE 603 NOTE 6 RELATED PAR! 17 PAGE 603 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (36) NOTE 7 OIL AND GAS INFORM (37) NOTE 7 OIL AND GAS INFORM (38)! 19 PAGE 605 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (10)Beneficial Ownership (10)PARKER PARSLEY 87A LTDSELECTED FINANCIAL DATA (17) SUPPLEMENTAL INFORMATION (18)Balance Sheet (18)Income Statement (19) STATEMENTS OF PARTNERS CA (18)Cash Flows (19) 8 PAGE 625 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (36)! NOTE 5 OIL AND GAS PRODUC (37)! 9 PAGE 626 NOTE 6 RELATED PART! 9 PAGE 626 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (39) NOTE 7 OIL AND GAS INFORM (40) NOTE 7 OIL AND GAS INFORM (41)! 11 PAGE 628 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (18) SUPPLEMENTAL INFORMATION (19) ITEM 6 SELECTED FINANCIAL (11)INDEX TO FINANCIAL STATEM (8)Balance Sheet (19)Income Statement (20) STATEMENTS OF PARTNERS CA (19)Cash Flows (20)NOTE 4 INCOME TAXES (12)! NOTE 5 OIL AND GAS PRODUC (38)! NOTE 5 OIL AND GAS PRODUC (39)! 17 PAGE 653 NOTE 6 RELATED PAR! 17 PAGE 653 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (42) NOTE 7 OIL AND GAS INFORM (43) NOTE 7 OIL AND GAS INFORM (44)! 19 PAGE 655 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (11)Beneficial Ownership (11)PARKER PARSLEY 87B LTDINDEX TO EXHIBITS (9)SELECTED FINANCIAL DATA (19) SUPPLEMENTAL INFORMATION (20) ITEM 6 SELECTED FINANCIAL (12)INDEX TO FINANCIAL STATEM (9)Balance Sheet (20)Income Statement (21) STATEMENTS OF PARTNERS CA (20)Cash Flows (21)!16 PAGE 683 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (40)! NOTE 5 OIL AND GAS PRODUC (41)! NOTE 6 RELATED PARTY TRANS (8)! NOTE 6 RELATED PARTY TRANS (9) NOTE 7 OIL AND GAS INFORM (45) NOTE 7 OIL AND GAS INFORM (46) NOTE 7 OIL AND GAS INFORM (47)!19 PAGE 686 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (12)Beneficial Ownership (12)PROPERTIES 87A LTDINDEX TO EXHIBITS (10)SELECTED FINANCIAL DATA (20) SUPPLEMENTAL INFORMATION (21) ITEM 6 SELECTED FINANCIAL (13)INDEX TO FINANCIAL STATE (10)Balance Sheet (21)Income Statement (22) STATEMENTS OF PARTNERS CA (21)Cash Flows (22)!16 PAGE 714 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (42)! NOTE 5 OIL AND GAS PRODUC (43)! 17 PAGE 715 NOTE 6 RELATED PAR! 17 PAGE 715 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (48) NOTE 7 OIL AND GAS INFORM (49) NOTE 7 OIL AND GAS INFORM (50)! 19 PAGE 717 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (13)Beneficial Ownership (13)PROPERTIES 87B LTDINDEX TO EXHIBITS (11)SELECTED FINANCIAL DATA (21) SUPPLEMENTAL INFORMATION (22)Balance Sheet (22)Income Statement (23) STATEMENTS OF PARTNERS CA (22)Cash Flows (23) 8 PAGE 737 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (44)! NOTE 5 OIL AND GAS PRODUC (45)! 9 PAGE 738 NOTE 6 RELATED PART! 9 PAGE 738 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (51) NOTE 7 OIL AND GAS INFORM (52) NOTE 7 OIL AND GAS INFORM (53)! 11 PAGE 740 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (22) SUPPLEMENTAL INFORMATION (23)Balance Sheet (23)Income Statement (24) STATEMENTS OF PARTNERS CA (23)Cash Flows (24) 8 PAGE 756 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (46)! NOTE 5 OIL AND GAS PRODUC (47)! 9 PAGE 757 NOTE 6 RELATED PART! 9 PAGE 757 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (54) NOTE 7 OIL AND GAS INFORM (55) NOTE 7 OIL AND GAS INFORM (56)! 11 PAGE 759 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (23)!31 2000 1 PAGE 766 PARKER PARSLPARKER PARSLEY 88A LP ITEM 6 SELECTED FINANCIAL (14)INDEX TO FINANCIAL STATE (11)Balance Sheet (24)Income Statement (25) STATEMENTS OF PARTNERS CA (24)Cash Flows (25)NOTE 4 INCOME TAXES (13)! NOTE 5 OIL AND GAS PRODUC (48)! NOTE 5 OIL AND GAS PRODUC (49)! 16 PAGE 783 NOTE 6 RELATED PAR! 16 PAGE 783 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (57) NOTE 7 OIL AND GAS INFORM (58) NOTE 7 OIL AND GAS INFORM (59)! 18 PAGE 785 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (14)Beneficial Ownership (14)PARKER PARSLEY 88A LP (1)INDEX TO EXHIBITS (12)SELECTED FINANCIAL DATA (24) SUPPLEMENTAL INFORMATION (24)Balance Sheet (25)Income Statement (26) STATEMENTS OF PARTNERS CA (25)Cash Flows (26) 8 PAGE 805 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (50)! NOTE 5 OIL AND GAS PRODUC (51)! 9 PAGE 806 NOTE 6 RELATED PART! 9 PAGE 806 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (60) NOTE 7 OIL AND GAS INFORM (61) NOTE 7 OIL AND GAS INFORM (62)! 11 PAGE 808 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (25)!31 2000 1 PAGE 815 PARKER PARSLPARKER PARSLEY 88B LP ITEM 6 SELECTED FINANCIAL (15)INDEX TO FINANCIAL STATE (12)Balance Sheet (26)Income Statement (27) STATEMENTS OF PARTNERS CA (26)Cash Flows (27)!16 PAGE 832 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (52)! NOTE 5 OIL AND GAS PRODUC (53)! 17 PAGE 833 NOTE 6 RELATED PAR! 17 PAGE 833 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (63) NOTE 7 OIL AND GAS INFORM (64) NOTE 7 OIL AND GAS INFORM (65)! 19 PAGE 835 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (15)Beneficial Ownership (15)PARKER PARSLEY 88B LP (1)INDEX TO EXHIBITS (13)SELECTED FINANCIAL DATA (26) SUPPLEMENTAL INFORMATION (25)Balance Sheet (27)Income Statement (28) STATEMENTS OF PARTNERS CA (27)Cash Flows (28) 8 PAGE 855 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (54)! NOTE 5 OIL AND GAS PRODUC (55)! 9 PAGE 856 NOTE 6 RELATED PART! 9 PAGE 856 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (66) NOTE 7 OIL AND GAS INFORM (67) NOTE 7 OIL AND GAS INFORM (68)! 11 PAGE 858 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (27)!31 2000 1 PAGE 865 PARKER PARSLBalance Sheet (28)Income Statement (29) STATEMENTS OF PARTNERS CA (28)Cash Flows (29) 8 PAGE 874 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (56)! NOTE 5 OIL AND GAS PRODUC (57)! 9 PAGE 875 NOTE 6 RELATED PART! 9 PAGE 875 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (69) NOTE 7 OIL AND GAS INFORM (70) NOTE 7 OIL AND GAS INFORM (71)! 11 PAGE 877 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (28) SUPPLEMENTAL INFORMATION (26)!PARKER PARSLEY PRODUCING PROPER ITEM 6 SELECTED FINANCIAL (16)INDEX TO FINANCIAL STATE (13)Balance Sheet (29)Income Statement (30) STATEMENTS OF PARTNERS CA (29)Cash Flows (30)NOTE 4 INCOME TAXES (14)! NOTE 5 OIL AND GAS PRODUC (58)! NOTE 5 OIL AND GAS PRODUC (59)! 16 PAGE 901 NOTE 6 RELATED PAR! 16 PAGE 901 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (72) NOTE 7 OIL AND GAS INFORM (73)!18 PAGE 903 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (16)Beneficial Ownership (16)PROPERTIES 88A LPINDEX TO EXHIBITS (14)SELECTED FINANCIAL DATA (29) SUPPLEMENTAL INFORMATION (27)Balance Sheet (30)Income Statement (31) STATEMENTS OF PARTNERS CA (30)Cash Flows (31)NOTE 4 INCOME TAXES (15)! NOTE 5 OIL AND GAS PRODUC (60)! NOTE 5 OIL AND GAS PRODUC (61)! 9 PAGE 924 NOTE 6 RELATED PART! 9 PAGE 924 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (74) NOTE 7 OIL AND GAS INFORM (75) NOTE 7 OIL AND GAS INFORM (76)! 11 PAGE 926 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (30) SUPPLEMENTAL INFORMATION (28)Balance Sheet (31)Income Statement (32) STATEMENTS OF PARTNERS CA (31)Cash Flows (32)NOTE 4 INCOME TAXES (16)! NOTE 5 OIL AND GAS PRODUC (62)! NOTE 5 OIL AND GAS PRODUC (63)! 9 PAGE 943 NOTE 6 RELATED PART! 9 PAGE 943 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (77) NOTE 7 OIL AND GAS INFORM (78) NOTE 7 OIL AND GAS INFORM (79)!11 PAGE 945 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (31)!31 2000 1 PAGE 952 PARKER PARSLPARKER PARSLEY 89A LP ITEM 6 SELECTED FINANCIAL (17)INDEX TO FINANCIAL STATE (14)Balance Sheet (32)Income Statement (33) STATEMENTS OF PARTNERS CA (32)Cash Flows (33)NOTE 4 INCOME TAXES (17)! NOTE 5 OIL AND GAS PRODUC (64)! NOTE 5 OIL AND GAS PRODUC (65)! 16 PAGE 969 NOTE 6 RELATED PAR! 16 PAGE 969 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (80) NOTE 7 OIL AND GAS INFORM (81) NOTE 7 OIL AND GAS INFORM (82) NOTE 7 OIL AND GAS INFORM (83)! 18 PAGE 971 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (17)Beneficial Ownership (17)PARKER PARSLEY 89A LP (1)INDEX TO EXHIBITS (15)SELECTED FINANCIAL DATA (32) SUPPLEMENTAL INFORMATION (29)Balance Sheet (33)Income Statement (34) STATEMENTS OF PARTNERS CA (33)Cash Flows (34) 8 PAGE 991 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (66)! NOTE 5 OIL AND GAS PRODUC (67)! 9 PAGE 992 NOTE 6 RELATED PART! 9 PAGE 992 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (84) NOTE 7 OIL AND GAS INFORM (85) NOTE 7 OIL AND GAS INFORM (86)! 11 PAGE 994 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (33)!31 2000 1 PAGE 1001 PARKER PARSBalance Sheet (34)Income Statement (35) STATEMENTS OF PARTNERS CA (34)Cash Flows (35)!8 PAGE 1010 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (68)! NOTE 5 OIL AND GAS PRODUC (69)! 9 PAGE 1011 NOTE 6 RELATED PAR! 9 PAGE 1011 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (87) NOTE 7 OIL AND GAS INFORM (88) NOTE 7 OIL AND GAS INFORM (89)!11 PAGE 1013 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (34) SUPPLEMENTAL INFORMATION (30)Balance Sheet (35)Income Statement (36) STATEMENTS OF PARTNERS CA (35)Cash Flows (36)!8 PAGE 1029 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (70)! NOTE 5 OIL AND GAS PRODUC (71)! 9 PAGE 1030 NOTE 6 RELATED PAR! 9 PAGE 1030 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (90) NOTE 7 OIL AND GAS INFORM (91) NOTE 7 OIL AND GAS INFORM (92)! 11 PAGE 1032 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (35) SUPPLEMENTAL INFORMATION (31)Balance Sheet (36)Income Statement (37) STATEMENTS OF PARTNERS CA (36)Cash Flows (37)!8 PAGE 1048 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (72)! NOTE 5 OIL AND GAS PRODUC (73)! 9 PAGE 1049 NOTE 6 RELATED PAR! 9 PAGE 1049 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (93) NOTE 7 OIL AND GAS INFORM (94) NOTE 7 OIL AND GAS INFORM (95)! 11 PAGE 1051 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (36)!31 2000 1 PAGE 1058 PARKER PARSPARKER PARSLEY 90A LP ITEM 6 SELECTED FINANCIAL (18)INDEX TO FINANCIAL STATE (15)Balance Sheet (37)Income Statement (38) STATEMENTS OF PARTNERS CA (37)Cash Flows (38)!15 PAGE 1074 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (74)! NOTE 5 OIL AND GAS PRODUC (75)! NOTE 6 RELATED PARTY TRAN (10)! NOTE 6 RELATED PARTY TRAN (11) NOTE 7 OIL AND GAS INFORM (96) NOTE 7 OIL AND GAS INFORM (97)! 18 PAGE 1077 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (18)Beneficial Ownership (18)PARKER PARSLEY 90A LP (1)INDEX TO EXHIBITS (16)SELECTED FINANCIAL DATA (37) SUPPLEMENTAL INFORMATION (32)PARKER PARSLEY 90B CONV LP ITEM 6 SELECTED FINANCIAL (19)INDEX TO FINANCIAL STATE (16)Balance Sheet (38)Income Statement (39) STATEMENTS OF PARTNERS CA (38)Cash Flows (39)!16 PAGE 1105 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (76)! NOTE 5 OIL AND GAS PRODUC (77)! NOTE 6 RELATED PARTY TRAN (12)! NOTE 6 RELATED PARTY TRAN (13) NOTE 7 OIL AND GAS INFORM (98) NOTE 7 OIL AND GAS INFORM (99) NOTE 7 OIL AND GAS INFOR (100)! 19 PAGE 1108 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (19)Beneficial Ownership (19) PARKER PARSLEY 90B CONV LP (1)INDEX TO EXHIBITS (17)SELECTED FINANCIAL DATA (38)!31 2000 1 PAGE 1119 PARKER PARSPARKER PARSLEY 90B LP ITEM 6 SELECTED FINANCIAL (20)INDEX TO FINANCIAL STATE (17)Balance Sheet (39)Income Statement (40) STATEMENTS OF PARTNERS CA (39)Cash Flows (40)!16 PAGE 1136 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (78)! NOTE 5 OIL AND GAS PRODUC (79)! NOTE 6 RELATED PARTY TRAN (14)! NOTE 6 RELATED PARTY TRAN (15) NOTE 7 OIL AND GAS INFOR (101) NOTE 7 OIL AND GAS INFOR (102) NOTE 7 OIL AND GAS INFOR (103)! 19 PAGE 1139 NOTE 8 MAJOR CUS!ITEM 10 DIRECTORS AND EXEC (20)Beneficial Ownership (20)PARKER PARSLEY 90B LP (1)INDEX TO EXHIBITS (18)SELECTED FINANCIAL DATA (39) SUPPLEMENTAL INFORMATION (33)PARKER PARSLEY 90C CONV LP ITEM 6 SELECTED FINANCIAL (21)INDEX TO FINANCIAL STATE (18)Balance Sheet (40)Income Statement (41) STATEMENTS OF PARTNERS CA (40)Cash Flows (41)!15 PAGE 1166 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (80)! NOTE 5 OIL AND GAS PRODUC (81)! NOTE 6 RELATED PARTY TRAN (16)! NOTE 6 RELATED PARTY TRAN (17) NOTE 7 OIL AND GAS INFOR (104) NOTE 7 OIL AND GAS INFOR (105) NOTE 7 OIL AND GAS INFOR (106)! 18 PAGE 1169 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (21)Beneficial Ownership (21) PARKER PARSLEY 90C CONV LP (1)INDEX TO EXHIBITS (19)SELECTED FINANCIAL DATA (40)!31 2000 1 PAGE 1180 PARKER PARSPARKER PARSLEY 90C LP ITEM 6 SELECTED FINANCIAL (22)INDEX TO FINANCIAL STATE (19)Balance Sheet (41)Income Statement (42) STATEMENTS OF PARTNERS CA (41)Cash Flows (42)!15 PAGE 1196 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (82)! NOTE 5 OIL AND GAS PRODUC (83)! NOTE 6 RELATED PARTY TRAN (18)! NOTE 6 RELATED PARTY TRAN (19) NOTE 7 OIL AND GAS INFOR (107) NOTE 7 OIL AND GAS INFOR (108) NOTE 7 OIL AND GAS INFOR (109)! 18 PAGE 1199 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (22)Beneficial Ownership (22)PARKER PARSLEY 90C LP (1)INDEX TO EXHIBITS (20)SELECTED FINANCIAL DATA (41) SUPPLEMENTAL INFORMATION (34)Balance Sheet (42)Income Statement (43) STATEMENTS OF PARTNERS CA (42)Cash Flows (43)!8 PAGE 1219 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (84)! NOTE 5 OIL AND GAS PRODUC (85)! 9 PAGE 1220 NOTE 6 RELATED PAR! 9 PAGE 1220 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (110) NOTE 7 OIL AND GAS INFOR (111) NOTE 7 OIL AND GAS INFOR (112)! 11 PAGE 1222 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (42) SUPPLEMENTAL INFORMATION (35)Balance Sheet (43)Income Statement (44) STATEMENTS OF PARTNERS CA (43)Cash Flows (44)!8 PAGE 1238 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (86)! NOTE 5 OIL AND GAS PRODUC (87)! 9 PAGE 1239 NOTE 6 RELATED PAR! 9 PAGE 1239 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (113) NOTE 7 OIL AND GAS INFOR (114) NOTE 7 OIL AND GAS INFOR (115)! 11 PAGE 1241 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (43)!31 2000 1 PAGE 1248 PARKER PARSPARKER PARSLEY 91A LP ITEM 6 SELECTED FINANCIAL (23)INDEX TO FINANCIAL STATE (20)Balance Sheet (44)Income Statement (45) STATEMENTS OF PARTNERS CA (44)Cash Flows (45)!15 PAGE 1264 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (88)! NOTE 5 OIL AND GAS PRODUC (89)! NOTE 6 RELATED PARTY TRAN (20)! NOTE 6 RELATED PARTY TRAN (21) NOTE 7 OIL AND GAS INFOR (116) NOTE 7 OIL AND GAS INFOR (117) NOTE 7 OIL AND GAS INFOR (118)! 18 PAGE 1267 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (23)Beneficial Ownership (23)PARKER PARSLEY 91A LP (1)INDEX TO EXHIBITS (21)SELECTED FINANCIAL DATA (44)!31 2000 1 PAGE 1278 PARKER PARSPARKER PARSLEY 91B LP ITEM 6 SELECTED FINANCIAL (24)INDEX TO FINANCIAL STATE (21)Balance Sheet (45)Income Statement (46) STATEMENTS OF PARTNERS CA (45)Cash Flows (46)!15 PAGE 1294 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (90)! NOTE 5 OIL AND GAS PRODUC (91)! NOTE 6 RELATED PARTY TRAN (22)! NOTE 6 RELATED PARTY TRAN (23) NOTE 7 OIL AND GAS INFOR (119) NOTE 7 OIL AND GAS INFOR (120) NOTE 7 OIL AND GAS INFOR (121)! 18 PAGE 1297 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (24)Beneficial Ownership (24)PARKER PARSLEY 91B LP (1)INDEX TO EXHIBITS (22)SELECTED FINANCIAL DATA (45)POWER OF ATTORNEYPOWER OF ATTORNEY (1)POWER OF ATTORNEY (2)POWER OF ATTORNEY (3)POWER OF ATTORNEY (4)POWER OF ATTORNEY (5)POWER OF ATTORNEY (6)POWER OF ATTORNEY (7)!2001 THE BOARD OF DIRECTORS REC!2001 THE BOARD OF DIRECTORS (1)!2001 THE BOARD OF DIRECTORS (2)PAGE 2U } J} y } I }   0    $PIONEER NATURAL RESOURCES CO S-4 04/17/2001AT DECEMBER 31, 2000  OIL AND NATURAL  BARRELS OF  NGLS GAS  EQUIVALENTS  (MMBBLS) (BCF) (MMBOE) )!NET PROVED RESERVES (HISTORICAL):PIONEER: Developedm@33333@<~@ Undeveloped33333S@33333;x@ b@ Total̄s@@@COMBINED PARTNERSHIPS: DevelopedL;@B@@@1)NET PROVED RESERVES (PRO FORMA COMBINED): Developed\p@33333+@<@ Undeveloped33333S@33333;x@ b@ TotalYu@:@~ b Dl{ocW}qe8$V j:.[+ !"#$%&'()*+,-./ 4!,RESERVE VALUATION INFORMATION (IN MILLIONS):"PIONEER:*#" Estimated future net cash flows##~ #©C$; Standardized measure of discounted future net cash flows$$~ $:X%COMBINED PARTNERSHIPS:*&" Estimated future net cash flows&&~ &F'> Standardized measure of discounted future net cash flows(1)''~ '>(PRO FORMA COMBINED:*)" Estimated future net cash flows))~ )C*; Standardized measure of discounted future net cash flows**~ *:[+,$-____________________________1.)Created by Morningstar Document Research.0/(http://documentresearch.morningstar.com/$,Tq! =PF0*8X> @//..-- l  $W5X dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/?? SECURITIES AND EXC!CALCULATION OF REGISTRATION FEETO BE HELD ON 2001TABLE OF CONTENTSPAGE 7 LIST OF APPENDICES!LIMITED PARTNER INVESTMENT REPA!LIMITED PARTNER INVESTMENT (1) 5 PAGE 15 NYMEX FUTURES PRICES!EXAMPLE CALCULATION OF MERGER VIncome StatementIncome Statement (1)AT DECEMBER 31 2000!25 PAGE 35 REASONS FOR THE MERGFAIRNESS OPINIONFAIRNESS OPINION (1)!LEGAL OPINION FOR LIMITED PARTN!LEGAL OPINION FOR LIMITED P (1)!NONMANAGING GENERAL PARTNERS OF!49 PAGE 59 PAYMENT OF EXPENSES !58 PAGE 68 COMPARATIVE PER SHAR!60 PAGE 70 OWNERSHIP OF PARTNER PIONEER PIONEER USATHE DRILLING PARTNERSHIPSTHE DRILLING PARTNERSHIPS (1)THE INCOME PARTNERSHIPS INTERESTSINTERESTS (1)INTERESTS (2)INTERESTS (3)INTERESTS (4)INTERESTS (5)!WHERE YOU CAN FIND MORE INFORMAAS OF DECEMBER 31 2000YEAR ENDED DECEMBER 31 2000!QUANTITIES OF OIL AND GAS RESER!STANDARDIZED MEASURE OF DISCOUN CASH FLOWSAS OF MARCH 31 2001AS OF MARCH 31 2001 (1)AS OF MARCH 31 2001 (2)AS OF MARCH 31 2001 (3)AS OF MARCH 31 2001 (4)AS OF MARCH 31 2001 (5)!FROM INCEPTION THROUGH MARCH 31!ANNUAL REPURCHASE PRICES AND AGOF EACH PARTNERSHIP!FOR THE THREE MONTHS ENDED MARCAS OF DECEMBER 31 2000 (1)AS OF MARCH 31 2001 (6)!THE YEARS ENDED DECEMBER 31 200AS OF DECEMBER 31 2000 (2)DECEMBER 31 2000 AND 1999EFFECTIVE DECEMBER 31 2000 EFFECTIVE DECEMBER 31 2000 (1) RECITALS RECITALS (1) SUPPLEMENTAL INFORMATION TABLEBalance SheetIncome Statement (2) STATEMENTS OF PARTNERS CAPITALCash Flows (1)NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCING A! NOTE 5 OIL AND GAS PRODUCI (1)! NOTE 6 RELATED PARTY TRANSACTI! NOTE 6 RELATED PARTY TRANS (1)! NOTE 7 OIL AND GAS INFORMATION! NOTE 7 OIL AND GAS INFORMA (1)! NOTE 7 OIL AND GAS INFORMA (2)!11 PAGE 163 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA SUPPLEMENTAL INFORMATION T (1)Balance Sheet (1)Income Statement (3) STATEMENTS OF PARTNERS CAP (1)Cash Flows (2)NOTE 4 INCOME TAXES (1)! NOTE 5 OIL AND GAS PRODUCI (2)! NOTE 5 OIL AND GAS PRODUCI (3)! 9 PAGE 180 NOTE 6 RELATED PAR! 9 PAGE 180 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORMA (3)! NOTE 7 OIL AND GAS INFORMA (4)! NOTE 7 OIL AND GAS INFORMA (5)!11 PAGE 182 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (1) SUPPLEMENTAL INFORMATION T (2) ITEM 6 SELECTED FINANCIAL DATAINDEX TO FINANCIAL STATEMENTSBalance Sheet (2)Income Statement (4) STATEMENTS OF PARTNERS CAP (2)Cash Flows (3)!15 PAGE 205 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCI (4)! NOTE 5 OIL AND GAS PRODUCI (5)! NOTE 6 RELATED PARTY TRANS (2)! NOTE 6 RELATED PARTY TRANS (3)! NOTE 7 OIL AND GAS INFORMA (6)! NOTE 7 OIL AND GAS INFORMA (7)! NOTE 7 OIL AND GAS INFORMA (8)! NOTE 7 OIL AND GAS INFORMA (9)! NOTE 7 OIL AND GAS INFORM (10)! 18 PAGE 208 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECUTIVEBeneficial OwnershipPARKER PARSLEY 82I LTDINDEX TO EXHIBITSSELECTED FINANCIAL DATA (2) SUPPLEMENTAL INFORMATION T (3) ITEM 6 SELECTED FINANCIAL (1)INDEX TO FINANCIAL STATEM (1)Balance Sheet (3)Income Statement (5) STATEMENTS OF PARTNERS CAP (3)Cash Flows (4)NOTE 4 INCOME TAXES (2)! NOTE 5 OIL AND GAS PRODUCI (6)! NOTE 5 OIL AND GAS PRODUCI (7)! 16 PAGE 236 NOTE 6 RELATED PAR! 16 PAGE 236 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (11)! NOTE 7 OIL AND GAS INFORM (12)! NOTE 7 OIL AND GAS INFORM (13)!18 PAGE 238 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (1)Beneficial Ownership (1)PARKER PARSLEY 82II LTDINDEX TO EXHIBITS (1)SELECTED FINANCIAL DATA (3) SUPPLEMENTAL INFORMATION T (4)Balance Sheet (4)Income Statement (6) STATEMENTS OF PARTNERS CAP (4)Cash Flows (5)NOTE 4 INCOME TAXES (3)! NOTE 5 OIL AND GAS PRODUCI (8)! NOTE 5 OIL AND GAS PRODUCI (9)! 9 PAGE 259 NOTE 6 RELATED PART! 9 PAGE 259 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (14)! NOTE 7 OIL AND GAS INFORM (15)! NOTE 7 OIL AND GAS INFORM (16)!11 PAGE 261 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (4) SUPPLEMENTAL INFORMATION T (5)PARKER PARSLEY 83A LTD ITEM 6 SELECTED FINANCIAL (2)INDEX TO FINANCIAL STATEM (2)Balance Sheet (5)Income Statement (7) STATEMENTS OF PARTNERS CAP (5)Cash Flows (6)NOTE 4 INCOME TAXES (4)! NOTE 5 OIL AND GAS PRODUC (10)! NOTE 5 OIL AND GAS PRODUC (11)! 16 PAGE 285 NOTE 6 RELATED PAR! 16 PAGE 285 NOTE 6 RELATED (1)!NOTE 7 OIL AND GAS INFORMATION  NOTE 7 OIL AND GAS INFORMA (1) NOTE 7 OIL AND GAS INFORMA (2)! 18 PAGE 287 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECU (2)Beneficial Ownership (2)PARKER PARSLEY 83A LTD (1)INDEX TO EXHIBITS (2)SELECTED FINANCIAL DATA (5) SUPPLEMENTAL INFORMATION T (6)PARKER PARSLEY 83B LTD ITEM 6 SELECTED FINANCIAL (3)INDEX TO FINANCIAL STATEM (3)Balance Sheet (6)Income Statement (8) STATEMENTS OF PARTNERS CAP (6)Cash Flows (7)NOTE 4 INCOME TAXES (5)! NOTE 5 OIL AND GAS PRODUC (12)! NOTE 5 OIL AND GAS PRODUC (13)! 16 PAGE 315 NOTE 6 RELATED PAR! 16 PAGE 315 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (3) NOTE 7 OIL AND GAS INFORMA (4) NOTE 7 OIL AND GAS INFORMA (5)!18 PAGE 317 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (3)Beneficial Ownership (3)PARKER PARSLEY 83B LTD (1)INDEX TO EXHIBITS (3)SELECTED FINANCIAL DATA (6) SUPPLEMENTAL INFORMATION T (7)PARKER PARSLEY 84A LTD ITEM 6 SELECTED FINANCIAL (4)INDEX TO FINANCIAL STATEM (4)Balance Sheet (7)Income Statement (9) STATEMENTS OF PARTNERS CAP (7)Cash Flows (8)!15 PAGE 344 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (14)! NOTE 5 OIL AND GAS PRODUC (15)! 16 PAGE 345 NOTE 6 RELATED PAR! 16 PAGE 345 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (6) NOTE 7 OIL AND GAS INFORMA (7) NOTE 7 OIL AND GAS INFORMA (8)!18 PAGE 347 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (4)Beneficial Ownership (4)PARKER PARSLEY 84A LTD (1)INDEX TO EXHIBITS (4)SELECTED FINANCIAL DATA (7) SUPPLEMENTAL INFORMATION T (8)PARKER PARSLEY 85A LTD ITEM 6 SELECTED FINANCIAL (5)INDEX TO FINANCIAL STATEM (5)Balance Sheet (8)Income Statement (10) STATEMENTS OF PARTNERS CAP (8)Cash Flows (9)NOTE 4 INCOME TAXES (6)! NOTE 5 OIL AND GAS PRODUC (16)! NOTE 5 OIL AND GAS PRODUC (17)! 16 PAGE 375 NOTE 6 RELATED PAR! 16 PAGE 375 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (9) NOTE 7 OIL AND GAS INFORM (10) NOTE 7 OIL AND GAS INFORM (11)!18 PAGE 377 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (5)Beneficial Ownership (5)PARKER PARSLEY 85A LTD (1)INDEX TO EXHIBITS (5)SELECTED FINANCIAL DATA (8) SUPPLEMENTAL INFORMATION T (9)PARKER PARSLEY 85B LTD ITEM 6 SELECTED FINANCIAL (6)!7 PAGE 396 ITEM 8 FINANCIAL STABalance Sheet (9) STATEMENTS OF PARTNERS CAP (9)Cash Flows (10)!15 PAGE 404 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (18)! NOTE 5 OIL AND GAS PRODUC (19)! 16 PAGE 405 NOTE 6 RELATED PAR! 16 PAGE 405 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (12) NOTE 7 OIL AND GAS INFORM (13) NOTE 7 OIL AND GAS INFORM (14)!18 PAGE 407 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (6)Beneficial Ownership (6)PARKER PARSLEY 85B LTD (1)INDEX TO EXHIBITS (6)SELECTED FINANCIAL DATA (9) SUPPLEMENTAL INFORMATION (10)Balance Sheet (10)Income Statement (11) STATEMENTS OF PARTNERS CA (10)Cash Flows (11)NOTE 4 INCOME TAXES (7)! NOTE 5 OIL AND GAS PRODUC (20)! NOTE 5 OIL AND GAS PRODUC (21)! 9 PAGE 428 NOTE 6 RELATED PART! 9 PAGE 428 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (15) NOTE 7 OIL AND GAS INFORM (16) NOTE 7 OIL AND GAS INFORM (17)! 11 PAGE 430 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (10) SUPPLEMENTAL INFORMATION (11)Balance Sheet (11)Income Statement (12) STATEMENTS OF PARTNERS CA (11)Cash Flows (12) 8 PAGE 446 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (22)! NOTE 5 OIL AND GAS PRODUC (23)! 9 PAGE 447 NOTE 6 RELATED PART! 9 PAGE 447 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (18) NOTE 7 OIL AND GAS INFORM (19) NOTE 7 OIL AND GAS INFORM (20)! 11 PAGE 449 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (11) SUPPLEMENTAL INFORMATION (12)PARKER PARSLEY 86A LTD ITEM 6 SELECTED FINANCIAL (7)INDEX TO FINANCIAL STATEM (6)Balance Sheet (12)Income Statement (13) STATEMENTS OF PARTNERS CA (12)Cash Flows (13)NOTE 4 INCOME TAXES (8)! NOTE 5 OIL AND GAS PRODUC (24)! NOTE 5 OIL AND GAS PRODUC (25)! 16 PAGE 473 NOTE 6 RELATED PAR! 16 PAGE 473 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (21) NOTE 7 OIL AND GAS INFORM (22) NOTE 7 OIL AND GAS INFORM (23)!18 PAGE 475 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (7)Beneficial Ownership (7)PARKER PARSLEY 86A LTD (1)INDEX TO EXHIBITS (7)SELECTED FINANCIAL DATA (12) SUPPLEMENTAL INFORMATION (13)PARKER PARSLEY 86B LTD ITEM 6 SELECTED FINANCIAL (8)INDEX TO FINANCIAL STATEM (7)Balance Sheet (13)Income Statement (14) STATEMENTS OF PARTNERS CA (13)Cash Flows (14)!16 PAGE 503 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (26)! NOTE 5 OIL AND GAS PRODUC (27)! NOTE 6 RELATED PARTY TRANS (4)! NOTE 6 RELATED PARTY TRANS (5) NOTE 7 OIL AND GAS INFORM (24) NOTE 7 OIL AND GAS INFORM (25) NOTE 7 OIL AND GAS INFORM (26)!19 PAGE 506 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (8)Beneficial Ownership (8)PARKER PARSLEY 86B LTD (1)INDEX TO EXHIBITS (8)SELECTED FINANCIAL DATA (13) SUPPLEMENTAL INFORMATION (14) ITEM 6 SELECTED FINANCIAL (9)!7 PAGE 525 ITEM 8 FINANCIAL STABalance Sheet (14)Income Statement (15) STATEMENTS OF PARTNERS CA (14)Cash Flows (15)NOTE 4 INCOME TAXES (9)! NOTE 5 OIL AND GAS PRODUC (28)! NOTE 5 OIL AND GAS PRODUC (29)! 16 PAGE 534 NOTE 6 RELATED PAR! 16 PAGE 534 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (27) NOTE 7 OIL AND GAS INFORM (28) NOTE 7 OIL AND GAS INFORM (29)!18 PAGE 536 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (9)Beneficial Ownership (9)PARKER PARSLEY 86C LTDSELECTED FINANCIAL DATA (14) SUPPLEMENTAL INFORMATION (15)Balance Sheet (15)Income Statement (16) STATEMENTS OF PARTNERS CA (15)Cash Flows (16) 8 PAGE 556 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (30)! NOTE 5 OIL AND GAS PRODUC (31)! NOTE 6 RELATED PARTY TRANS (6)! NOTE 6 RELATED PARTY TRANS (7) NOTE 7 OIL AND GAS INFORM (30) NOTE 7 OIL AND GAS INFORM (31) NOTE 7 OIL AND GAS INFORM (32)! 11 PAGE 559 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (15) SUPPLEMENTAL INFORMATION (16)Balance Sheet (16)Income Statement (17) STATEMENTS OF PARTNERS CA (16)Cash Flows (17)NOTE 4 INCOME TAXES (10)! NOTE 5 OIL AND GAS PRODUC (32)! NOTE 5 OIL AND GAS PRODUC (33)! 9 PAGE 576 NOTE 6 RELATED PART! 9 PAGE 576 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (33) NOTE 7 OIL AND GAS INFORM (34) NOTE 7 OIL AND GAS INFORM (35)!11 PAGE 578 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (16) SUPPLEMENTAL INFORMATION (17) ITEM 6 SELECTED FINANCIAL (10)!8 PAGE 594 ITEM 8 FINANCIAL STABalance Sheet (17)Income Statement (18) STATEMENTS OF PARTNERS CA (17)Cash Flows (18)NOTE 4 INCOME TAXES (11)! NOTE 5 OIL AND GAS PRODUC (34)! NOTE 5 OIL AND GAS PRODUC (35)! 17 PAGE 603 NOTE 6 RELATED PAR! 17 PAGE 603 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (36) NOTE 7 OIL AND GAS INFORM (37) NOTE 7 OIL AND GAS INFORM (38)! 19 PAGE 605 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (10)Beneficial Ownership (10)PARKER PARSLEY 87A LTDSELECTED FINANCIAL DATA (17) SUPPLEMENTAL INFORMATION (18)Balance Sheet (18)Income Statement (19) STATEMENTS OF PARTNERS CA (18)Cash Flows (19) 8 PAGE 625 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (36)! NOTE 5 OIL AND GAS PRODUC (37)! 9 PAGE 626 NOTE 6 RELATED PART! 9 PAGE 626 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (39) NOTE 7 OIL AND GAS INFORM (40) NOTE 7 OIL AND GAS INFORM (41)! 11 PAGE 628 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (18) SUPPLEMENTAL INFORMATION (19) ITEM 6 SELECTED FINANCIAL (11)INDEX TO FINANCIAL STATEM (8)Balance Sheet (19)Income Statement (20) STATEMENTS OF PARTNERS CA (19)Cash Flows (20)NOTE 4 INCOME TAXES (12)! NOTE 5 OIL AND GAS PRODUC (38)! NOTE 5 OIL AND GAS PRODUC (39)! 17 PAGE 653 NOTE 6 RELATED PAR! 17 PAGE 653 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (42) NOTE 7 OIL AND GAS INFORM (43) NOTE 7 OIL AND GAS INFORM (44)! 19 PAGE 655 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (11)Beneficial Ownership (11)PARKER PARSLEY 87B LTDINDEX TO EXHIBITS (9)SELECTED FINANCIAL DATA (19) SUPPLEMENTAL INFORMATION (20) ITEM 6 SELECTED FINANCIAL (12)INDEX TO FINANCIAL STATEM (9)Balance Sheet (20)Income Statement (21) STATEMENTS OF PARTNERS CA (20)Cash Flows (21)!16 PAGE 683 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (40)! NOTE 5 OIL AND GAS PRODUC (41)! NOTE 6 RELATED PARTY TRANS (8)! NOTE 6 RELATED PARTY TRANS (9) NOTE 7 OIL AND GAS INFORM (45) NOTE 7 OIL AND GAS INFORM (46) NOTE 7 OIL AND GAS INFORM (47)!19 PAGE 686 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (12)Beneficial Ownership (12)PROPERTIES 87A LTDINDEX TO EXHIBITS (10)SELECTED FINANCIAL DATA (20) SUPPLEMENTAL INFORMATION (21) ITEM 6 SELECTED FINANCIAL (13)INDEX TO FINANCIAL STATE (10)Balance Sheet (21)Income Statement (22) STATEMENTS OF PARTNERS CA (21)Cash Flows (22)!16 PAGE 714 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (42)! NOTE 5 OIL AND GAS PRODUC (43)! 17 PAGE 715 NOTE 6 RELATED PAR! 17 PAGE 715 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (48) NOTE 7 OIL AND GAS INFORM (49) NOTE 7 OIL AND GAS INFORM (50)! 19 PAGE 717 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (13)Beneficial Ownership (13)PROPERTIES 87B LTDINDEX TO EXHIBITS (11)SELECTED FINANCIAL DATA (21) SUPPLEMENTAL INFORMATION (22)Balance Sheet (22)Income Statement (23) STATEMENTS OF PARTNERS CA (22)Cash Flows (23) 8 PAGE 737 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (44)! NOTE 5 OIL AND GAS PRODUC (45)! 9 PAGE 738 NOTE 6 RELATED PART! 9 PAGE 738 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (51) NOTE 7 OIL AND GAS INFORM (52) NOTE 7 OIL AND GAS INFORM (53)! 11 PAGE 740 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (22) SUPPLEMENTAL INFORMATION (23)Balance Sheet (23)Income Statement (24) STATEMENTS OF PARTNERS CA (23)Cash Flows (24) 8 PAGE 756 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (46)! NOTE 5 OIL AND GAS PRODUC (47)! 9 PAGE 757 NOTE 6 RELATED PART! 9 PAGE 757 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (54) NOTE 7 OIL AND GAS INFORM (55) NOTE 7 OIL AND GAS INFORM (56)! 11 PAGE 759 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (23)!31 2000 1 PAGE 766 PARKER PARSLPARKER PARSLEY 88A LP ITEM 6 SELECTED FINANCIAL (14)INDEX TO FINANCIAL STATE (11)Balance Sheet (24)Income Statement (25) STATEMENTS OF PARTNERS CA (24)Cash Flows (25)NOTE 4 INCOME TAXES (13)! NOTE 5 OIL AND GAS PRODUC (48)! NOTE 5 OIL AND GAS PRODUC (49)! 16 PAGE 783 NOTE 6 RELATED PAR! 16 PAGE 783 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (57) NOTE 7 OIL AND GAS INFORM (58) NOTE 7 OIL AND GAS INFORM (59)! 18 PAGE 785 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (14)Beneficial Ownership (14)PARKER PARSLEY 88A LP (1)INDEX TO EXHIBITS (12)SELECTED FINANCIAL DATA (24) SUPPLEMENTAL INFORMATION (24)Balance Sheet (25)Income Statement (26) STATEMENTS OF PARTNERS CA (25)Cash Flows (26) 8 PAGE 805 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (50)! NOTE 5 OIL AND GAS PRODUC (51)! 9 PAGE 806 NOTE 6 RELATED PART! 9 PAGE 806 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (60) NOTE 7 OIL AND GAS INFORM (61) NOTE 7 OIL AND GAS INFORM (62)! 11 PAGE 808 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (25)!31 2000 1 PAGE 815 PARKER PARSLPARKER PARSLEY 88B LP ITEM 6 SELECTED FINANCIAL (15)INDEX TO FINANCIAL STATE (12)Balance Sheet (26)Income Statement (27) STATEMENTS OF PARTNERS CA (26)Cash Flows (27)!16 PAGE 832 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (52)! NOTE 5 OIL AND GAS PRODUC (53)! 17 PAGE 833 NOTE 6 RELATED PAR! 17 PAGE 833 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (63) NOTE 7 OIL AND GAS INFORM (64) NOTE 7 OIL AND GAS INFORM (65)! 19 PAGE 835 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (15)Beneficial Ownership (15)PARKER PARSLEY 88B LP (1)INDEX TO EXHIBITS (13)SELECTED FINANCIAL DATA (26) SUPPLEMENTAL INFORMATION (25)Balance Sheet (27)Income Statement (28) STATEMENTS OF PARTNERS CA (27)Cash Flows (28) 8 PAGE 855 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (54)! NOTE 5 OIL AND GAS PRODUC (55)! 9 PAGE 856 NOTE 6 RELATED PART! 9 PAGE 856 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (66) NOTE 7 OIL AND GAS INFORM (67) NOTE 7 OIL AND GAS INFORM (68)! 11 PAGE 858 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (27)!31 2000 1 PAGE 865 PARKER PARSLBalance Sheet (28)Income Statement (29) STATEMENTS OF PARTNERS CA (28)Cash Flows (29) 8 PAGE 874 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (56)! NOTE 5 OIL AND GAS PRODUC (57)! 9 PAGE 875 NOTE 6 RELATED PART! 9 PAGE 875 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (69) NOTE 7 OIL AND GAS INFORM (70) NOTE 7 OIL AND GAS INFORM (71)! 11 PAGE 877 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (28) SUPPLEMENTAL INFORMATION (26)!PARKER PARSLEY PRODUCING PROPER ITEM 6 SELECTED FINANCIAL (16)INDEX TO FINANCIAL STATE (13)Balance Sheet (29)Income Statement (30) STATEMENTS OF PARTNERS CA (29)Cash Flows (30)NOTE 4 INCOME TAXES (14)! NOTE 5 OIL AND GAS PRODUC (58)! NOTE 5 OIL AND GAS PRODUC (59)! 16 PAGE 901 NOTE 6 RELATED PAR! 16 PAGE 901 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (72) NOTE 7 OIL AND GAS INFORM (73)!18 PAGE 903 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (16)Beneficial Ownership (16)PROPERTIES 88A LPINDEX TO EXHIBITS (14)SELECTED FINANCIAL DATA (29) SUPPLEMENTAL INFORMATION (27)Balance Sheet (30)Income Statement (31) STATEMENTS OF PARTNERS CA (30)Cash Flows (31)NOTE 4 INCOME TAXES (15)! NOTE 5 OIL AND GAS PRODUC (60)! NOTE 5 OIL AND GAS PRODUC (61)! 9 PAGE 924 NOTE 6 RELATED PART! 9 PAGE 924 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (74) NOTE 7 OIL AND GAS INFORM (75) NOTE 7 OIL AND GAS INFORM (76)! 11 PAGE 926 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (30) SUPPLEMENTAL INFORMATION (28)Balance Sheet (31)Income Statement (32) STATEMENTS OF PARTNERS CA (31)Cash Flows (32)NOTE 4 INCOME TAXES (16)! NOTE 5 OIL AND GAS PRODUC (62)! NOTE 5 OIL AND GAS PRODUC (63)! 9 PAGE 943 NOTE 6 RELATED PART! 9 PAGE 943 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (77) NOTE 7 OIL AND GAS INFORM (78) NOTE 7 OIL AND GAS INFORM (79)!11 PAGE 945 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (31)!31 2000 1 PAGE 952 PARKER PARSLPARKER PARSLEY 89A LP ITEM 6 SELECTED FINANCIAL (17)INDEX TO FINANCIAL STATE (14)Balance Sheet (32)Income Statement (33) STATEMENTS OF PARTNERS CA (32)Cash Flows (33)NOTE 4 INCOME TAXES (17)! NOTE 5 OIL AND GAS PRODUC (64)! NOTE 5 OIL AND GAS PRODUC (65)! 16 PAGE 969 NOTE 6 RELATED PAR! 16 PAGE 969 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (80) NOTE 7 OIL AND GAS INFORM (81) NOTE 7 OIL AND GAS INFORM (82) NOTE 7 OIL AND GAS INFORM (83)! 18 PAGE 971 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (17)Beneficial Ownership (17)PARKER PARSLEY 89A LP (1)INDEX TO EXHIBITS (15)SELECTED FINANCIAL DATA (32) SUPPLEMENTAL INFORMATION (29)Balance Sheet (33)Income Statement (34) STATEMENTS OF PARTNERS CA (33)Cash Flows (34) 8 PAGE 991 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (66)! NOTE 5 OIL AND GAS PRODUC (67)! 9 PAGE 992 NOTE 6 RELATED PART! 9 PAGE 992 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (84) NOTE 7 OIL AND GAS INFORM (85) NOTE 7 OIL AND GAS INFORM (86)! 11 PAGE 994 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (33)!31 2000 1 PAGE 1001 PARKER PARSBalance Sheet (34)Income Statement (35) STATEMENTS OF PARTNERS CA (34)Cash Flows (35)!8 PAGE 1010 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (68)! NOTE 5 OIL AND GAS PRODUC (69)! 9 PAGE 1011 NOTE 6 RELATED PAR! 9 PAGE 1011 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (87) NOTE 7 OIL AND GAS INFORM (88) NOTE 7 OIL AND GAS INFORM (89)!11 PAGE 1013 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (34) SUPPLEMENTAL INFORMATION (30)Balance Sheet (35)Income Statement (36) STATEMENTS OF PARTNERS CA (35)Cash Flows (36)!8 PAGE 1029 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (70)! NOTE 5 OIL AND GAS PRODUC (71)! 9 PAGE 1030 NOTE 6 RELATED PAR! 9 PAGE 1030 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (90) NOTE 7 OIL AND GAS INFORM (91) NOTE 7 OIL AND GAS INFORM (92)! 11 PAGE 1032 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (35) SUPPLEMENTAL INFORMATION (31)Balance Sheet (36)Income Statement (37) STATEMENTS OF PARTNERS CA (36)Cash Flows (37)!8 PAGE 1048 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (72)! NOTE 5 OIL AND GAS PRODUC (73)! 9 PAGE 1049 NOTE 6 RELATED PAR! 9 PAGE 1049 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (93) NOTE 7 OIL AND GAS INFORM (94) NOTE 7 OIL AND GAS INFORM (95)! 11 PAGE 1051 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (36)!31 2000 1 PAGE 1058 PARKER PARSPARKER PARSLEY 90A LP ITEM 6 SELECTED FINANCIAL (18)INDEX TO FINANCIAL STATE (15)Balance Sheet (37)Income Statement (38) STATEMENTS OF PARTNERS CA (37)Cash Flows (38)!15 PAGE 1074 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (74)! NOTE 5 OIL AND GAS PRODUC (75)! NOTE 6 RELATED PARTY TRAN (10)! NOTE 6 RELATED PARTY TRAN (11) NOTE 7 OIL AND GAS INFORM (96) NOTE 7 OIL AND GAS INFORM (97)! 18 PAGE 1077 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (18)Beneficial Ownership (18)PARKER PARSLEY 90A LP (1)INDEX TO EXHIBITS (16)SELECTED FINANCIAL DATA (37) SUPPLEMENTAL INFORMATION (32)PARKER PARSLEY 90B CONV LP ITEM 6 SELECTED FINANCIAL (19)INDEX TO FINANCIAL STATE (16)Balance Sheet (38)Income Statement (39) STATEMENTS OF PARTNERS CA (38)Cash Flows (39)!16 PAGE 1105 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (76)! NOTE 5 OIL AND GAS PRODUC (77)! NOTE 6 RELATED PARTY TRAN (12)! NOTE 6 RELATED PARTY TRAN (13) NOTE 7 OIL AND GAS INFORM (98) NOTE 7 OIL AND GAS INFORM (99) NOTE 7 OIL AND GAS INFOR (100)! 19 PAGE 1108 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (19)Beneficial Ownership (19) PARKER PARSLEY 90B CONV LP (1)INDEX TO EXHIBITS (17)SELECTED FINANCIAL DATA (38)!31 2000 1 PAGE 1119 PARKER PARSPARKER PARSLEY 90B LP ITEM 6 SELECTED FINANCIAL (20)INDEX TO FINANCIAL STATE (17)Balance Sheet (39)Income Statement (40) STATEMENTS OF PARTNERS CA (39)Cash Flows (40)!16 PAGE 1136 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (78)! NOTE 5 OIL AND GAS PRODUC (79)! NOTE 6 RELATED PARTY TRAN (14)! NOTE 6 RELATED PARTY TRAN (15) NOTE 7 OIL AND GAS INFOR (101) NOTE 7 OIL AND GAS INFOR (102) NOTE 7 OIL AND GAS INFOR (103)! 19 PAGE 1139 NOTE 8 MAJOR CUS!ITEM 10 DIRECTORS AND EXEC (20)Beneficial Ownership (20)PARKER PARSLEY 90B LP (1)INDEX TO EXHIBITS (18)SELECTED FINANCIAL DATA (39) SUPPLEMENTAL INFORMATION (33)PARKER PARSLEY 90C CONV LP ITEM 6 SELECTED FINANCIAL (21)INDEX TO FINANCIAL STATE (18)Balance Sheet (40)Income Statement (41) STATEMENTS OF PARTNERS CA (40)Cash Flows (41)!15 PAGE 1166 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (80)! NOTE 5 OIL AND GAS PRODUC (81)! NOTE 6 RELATED PARTY TRAN (16)! NOTE 6 RELATED PARTY TRAN (17) NOTE 7 OIL AND GAS INFOR (104) NOTE 7 OIL AND GAS INFOR (105) NOTE 7 OIL AND GAS INFOR (106)! 18 PAGE 1169 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (21)Beneficial Ownership (21) PARKER PARSLEY 90C CONV LP (1)INDEX TO EXHIBITS (19)SELECTED FINANCIAL DATA (40)!31 2000 1 PAGE 1180 PARKER PARSPARKER PARSLEY 90C LP ITEM 6 SELECTED FINANCIAL (22)INDEX TO FINANCIAL STATE (19)Balance Sheet (41)Income Statement (42) STATEMENTS OF PARTNERS CA (41)Cash Flows (42)!15 PAGE 1196 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (82)! NOTE 5 OIL AND GAS PRODUC (83)! NOTE 6 RELATED PARTY TRAN (18)! NOTE 6 RELATED PARTY TRAN (19) NOTE 7 OIL AND GAS INFOR (107) NOTE 7 OIL AND GAS INFOR (108) NOTE 7 OIL AND GAS INFOR (109)! 18 PAGE 1199 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (22)Beneficial Ownership (22)PARKER PARSLEY 90C LP (1)INDEX TO EXHIBITS (20)SELECTED FINANCIAL DATA (41) SUPPLEMENTAL INFORMATION (34)Balance Sheet (42)Income Statement (43) STATEMENTS OF PARTNERS CA (42)Cash Flows (43)!8 PAGE 1219 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (84)! NOTE 5 OIL AND GAS PRODUC (85)! 9 PAGE 1220 NOTE 6 RELATED PAR! 9 PAGE 1220 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (110) NOTE 7 OIL AND GAS INFOR (111) NOTE 7 OIL AND GAS INFOR (112)! 11 PAGE 1222 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (42) SUPPLEMENTAL INFORMATION (35)Balance Sheet (43)Income Statement (44) STATEMENTS OF PARTNERS CA (43)Cash Flows (44)!8 PAGE 1238 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (86)! NOTE 5 OIL AND GAS PRODUC (87)! 9 PAGE 1239 NOTE 6 RELATED PAR! 9 PAGE 1239 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (113) NOTE 7 OIL AND GAS INFOR (114) NOTE 7 OIL AND GAS INFOR (115)! 11 PAGE 1241 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (43)!31 2000 1 PAGE 1248 PARKER PARSPARKER PARSLEY 91A LP ITEM 6 SELECTED FINANCIAL (23)INDEX TO FINANCIAL STATE (20)Balance Sheet (44)Income Statement (45) STATEMENTS OF PARTNERS CA (44)Cash Flows (45)!15 PAGE 1264 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (88)! NOTE 5 OIL AND GAS PRODUC (89)! NOTE 6 RELATED PARTY TRAN (20)! NOTE 6 RELATED PARTY TRAN (21) NOTE 7 OIL AND GAS INFOR (116) NOTE 7 OIL AND GAS INFOR (117) NOTE 7 OIL AND GAS INFOR (118)! 18 PAGE 1267 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (23)Beneficial Ownership (23)PARKER PARSLEY 91A LP (1)INDEX TO EXHIBITS (21)SELECTED FINANCIAL DATA (44)!31 2000 1 PAGE 1278 PARKER PARSPARKER PARSLEY 91B LP ITEM 6 SELECTED FINANCIAL (24)INDEX TO FINANCIAL STATE (21)Balance Sheet (45)Income Statement (46) STATEMENTS OF PARTNERS CA (45)Cash Flows (46)!15 PAGE 1294 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (90)! NOTE 5 OIL AND GAS PRODUC (91)! NOTE 6 RELATED PARTY TRAN (22)! NOTE 6 RELATED PARTY TRAN (23) NOTE 7 OIL AND GAS INFOR (119) NOTE 7 OIL AND GAS INFOR (120) NOTE 7 OIL AND GAS INFOR (121)! 18 PAGE 1297 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (24)Beneficial Ownership (24)PARKER PARSLEY 91B LP (1)INDEX TO EXHIBITS (22)SELECTED FINANCIAL DATA (45)POWER OF ATTORNEYPOWER OF ATTORNEY (1)POWER OF ATTORNEY (2)POWER OF ATTORNEY (3)POWER OF ATTORNEY (4)POWER OF ATTORNEY (5)POWER OF ATTORNEY (6)POWER OF ATTORNEY (7)!2001 THE BOARD OF DIRECTORS REC!2001 THE BOARD OF DIRECTORS (1)!2001 THE BOARD OF DIRECTORS (2)PAGE 2U } 0`} 0 $    $PIONEER NATURAL RESOURCES CO S-4 04/17/20011)-15- 25 COMPARATIVE PER SHARE DATA   YEAR ENDED  DECEMBER 31, 2000  HISTORICAL -- PIONEER:KC Income from continuing operations per share, basic and dilutedffffff?! 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SECURITIES AND EXC!CALCULATION OF REGISTRATION FEETO BE HELD ON 2001TABLE OF CONTENTSPAGE 7 LIST OF APPENDICES!LIMITED PARTNER INVESTMENT REPA!LIMITED PARTNER INVESTMENT (1) 5 PAGE 15 NYMEX FUTURES PRICES!EXAMPLE CALCULATION OF MERGER VIncome StatementIncome Statement (1)AT DECEMBER 31 2000!15 PAGE 25 COMPARATIVE PER SHARFAIRNESS OPINIONFAIRNESS OPINION (1)!LEGAL OPINION FOR LIMITED PARTN!LEGAL OPINION FOR LIMITED P (1)!NONMANAGING GENERAL PARTNERS OF!49 PAGE 59 PAYMENT OF EXPENSES !58 PAGE 68 COMPARATIVE PER SHAR!60 PAGE 70 OWNERSHIP OF PARTNER PIONEER PIONEER USATHE DRILLING PARTNERSHIPSTHE DRILLING PARTNERSHIPS (1)THE INCOME PARTNERSHIPS INTERESTSINTERESTS (1)INTERESTS (2)INTERESTS (3)INTERESTS (4)INTERESTS (5)!WHERE YOU CAN FIND MORE INFORMAAS OF DECEMBER 31 2000YEAR ENDED DECEMBER 31 2000!QUANTITIES OF OIL AND GAS RESER!STANDARDIZED MEASURE OF DISCOUN CASH FLOWSAS OF MARCH 31 2001AS OF MARCH 31 2001 (1)AS OF MARCH 31 2001 (2)AS OF MARCH 31 2001 (3)AS OF MARCH 31 2001 (4)AS OF MARCH 31 2001 (5)!FROM INCEPTION THROUGH MARCH 31!ANNUAL REPURCHASE PRICES AND AGOF EACH PARTNERSHIP!FOR THE THREE MONTHS ENDED MARCAS OF DECEMBER 31 2000 (1)AS OF MARCH 31 2001 (6)!THE YEARS ENDED DECEMBER 31 200AS OF DECEMBER 31 2000 (2)DECEMBER 31 2000 AND 1999EFFECTIVE DECEMBER 31 2000 EFFECTIVE DECEMBER 31 2000 (1) RECITALS RECITALS (1) SUPPLEMENTAL INFORMATION TABLEBalance SheetIncome Statement (2) STATEMENTS OF PARTNERS CAPITALCash Flows (1)NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCING A! NOTE 5 OIL AND GAS PRODUCI (1)! NOTE 6 RELATED PARTY TRANSACTI! NOTE 6 RELATED PARTY TRANS (1)! NOTE 7 OIL AND GAS INFORMATION! NOTE 7 OIL AND GAS INFORMA (1)! NOTE 7 OIL AND GAS INFORMA (2)!11 PAGE 163 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA SUPPLEMENTAL INFORMATION T (1)Balance Sheet (1)Income Statement (3) STATEMENTS OF PARTNERS CAP (1)Cash Flows (2)NOTE 4 INCOME TAXES (1)! NOTE 5 OIL AND GAS PRODUCI (2)! NOTE 5 OIL AND GAS PRODUCI (3)! 9 PAGE 180 NOTE 6 RELATED PAR! 9 PAGE 180 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORMA (3)! NOTE 7 OIL AND GAS INFORMA (4)! NOTE 7 OIL AND GAS INFORMA (5)!11 PAGE 182 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (1) SUPPLEMENTAL INFORMATION T (2) ITEM 6 SELECTED FINANCIAL DATAINDEX TO FINANCIAL STATEMENTSBalance Sheet (2)Income Statement (4) STATEMENTS OF PARTNERS CAP (2)Cash Flows (3)!15 PAGE 205 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCI (4)! NOTE 5 OIL AND GAS PRODUCI (5)! NOTE 6 RELATED PARTY TRANS (2)! NOTE 6 RELATED PARTY TRANS (3)! NOTE 7 OIL AND GAS INFORMA (6)! NOTE 7 OIL AND GAS INFORMA (7)! NOTE 7 OIL AND GAS INFORMA (8)! NOTE 7 OIL AND GAS INFORMA (9)! NOTE 7 OIL AND GAS INFORM (10)! 18 PAGE 208 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECUTIVEBeneficial OwnershipPARKER PARSLEY 82I LTDINDEX TO EXHIBITSSELECTED FINANCIAL DATA (2) SUPPLEMENTAL INFORMATION T (3) ITEM 6 SELECTED FINANCIAL (1)INDEX TO FINANCIAL STATEM (1)Balance Sheet (3)Income Statement (5) STATEMENTS OF PARTNERS CAP (3)Cash Flows (4)NOTE 4 INCOME TAXES (2)! NOTE 5 OIL AND GAS PRODUCI (6)! NOTE 5 OIL AND GAS PRODUCI (7)! 16 PAGE 236 NOTE 6 RELATED PAR! 16 PAGE 236 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (11)! NOTE 7 OIL AND GAS INFORM (12)! NOTE 7 OIL AND GAS INFORM (13)!18 PAGE 238 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (1)Beneficial Ownership (1)PARKER PARSLEY 82II LTDINDEX TO EXHIBITS (1)SELECTED FINANCIAL DATA (3) SUPPLEMENTAL INFORMATION T (4)Balance Sheet (4)Income Statement (6) STATEMENTS OF PARTNERS CAP (4)Cash Flows (5)NOTE 4 INCOME TAXES (3)! NOTE 5 OIL AND GAS PRODUCI (8)! NOTE 5 OIL AND GAS PRODUCI (9)! 9 PAGE 259 NOTE 6 RELATED PART! 9 PAGE 259 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (14)! NOTE 7 OIL AND GAS INFORM (15)! NOTE 7 OIL AND GAS INFORM (16)!11 PAGE 261 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (4) SUPPLEMENTAL INFORMATION T (5)PARKER PARSLEY 83A LTD ITEM 6 SELECTED FINANCIAL (2)INDEX TO FINANCIAL STATEM (2)Balance Sheet (5)Income Statement (7) STATEMENTS OF PARTNERS CAP (5)Cash Flows (6)NOTE 4 INCOME TAXES (4)! NOTE 5 OIL AND GAS PRODUC (10)! NOTE 5 OIL AND GAS PRODUC (11)! 16 PAGE 285 NOTE 6 RELATED PAR! 16 PAGE 285 NOTE 6 RELATED (1)!NOTE 7 OIL AND GAS INFORMATION  NOTE 7 OIL AND GAS INFORMA (1) NOTE 7 OIL AND GAS INFORMA (2)! 18 PAGE 287 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECU (2)Beneficial Ownership (2)PARKER PARSLEY 83A LTD (1)INDEX TO EXHIBITS (2)SELECTED FINANCIAL DATA (5) SUPPLEMENTAL INFORMATION T (6)PARKER PARSLEY 83B LTD ITEM 6 SELECTED FINANCIAL (3)INDEX TO FINANCIAL STATEM (3)Balance Sheet (6)Income Statement (8) STATEMENTS OF PARTNERS CAP (6)Cash Flows (7)NOTE 4 INCOME TAXES (5)! NOTE 5 OIL AND GAS PRODUC (12)! NOTE 5 OIL AND GAS PRODUC (13)! 16 PAGE 315 NOTE 6 RELATED PAR! 16 PAGE 315 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (3) NOTE 7 OIL AND GAS INFORMA (4) NOTE 7 OIL AND GAS INFORMA (5)!18 PAGE 317 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (3)Beneficial Ownership (3)PARKER PARSLEY 83B LTD (1)INDEX TO EXHIBITS (3)SELECTED FINANCIAL DATA (6) SUPPLEMENTAL INFORMATION T (7)PARKER PARSLEY 84A LTD ITEM 6 SELECTED FINANCIAL (4)INDEX TO FINANCIAL STATEM (4)Balance Sheet (7)Income Statement (9) STATEMENTS OF PARTNERS CAP (7)Cash Flows (8)!15 PAGE 344 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (14)! NOTE 5 OIL AND GAS PRODUC (15)! 16 PAGE 345 NOTE 6 RELATED PAR! 16 PAGE 345 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (6) NOTE 7 OIL AND GAS INFORMA (7) NOTE 7 OIL AND GAS INFORMA (8)!18 PAGE 347 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (4)Beneficial Ownership (4)PARKER PARSLEY 84A LTD (1)INDEX TO EXHIBITS (4)SELECTED FINANCIAL DATA (7) SUPPLEMENTAL INFORMATION T (8)PARKER PARSLEY 85A LTD ITEM 6 SELECTED FINANCIAL (5)INDEX TO FINANCIAL STATEM (5)Balance Sheet (8)Income Statement (10) STATEMENTS OF PARTNERS CAP (8)Cash Flows (9)NOTE 4 INCOME TAXES (6)! NOTE 5 OIL AND GAS PRODUC (16)! NOTE 5 OIL AND GAS PRODUC (17)! 16 PAGE 375 NOTE 6 RELATED PAR! 16 PAGE 375 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (9) NOTE 7 OIL AND GAS INFORM (10) NOTE 7 OIL AND GAS INFORM (11)!18 PAGE 377 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (5)Beneficial Ownership (5)PARKER PARSLEY 85A LTD (1)INDEX TO EXHIBITS (5)SELECTED FINANCIAL DATA (8) SUPPLEMENTAL INFORMATION T (9)PARKER PARSLEY 85B LTD ITEM 6 SELECTED FINANCIAL (6)!7 PAGE 396 ITEM 8 FINANCIAL STABalance Sheet (9) STATEMENTS OF PARTNERS CAP (9)Cash Flows (10)!15 PAGE 404 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (18)! NOTE 5 OIL AND GAS PRODUC (19)! 16 PAGE 405 NOTE 6 RELATED PAR! 16 PAGE 405 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (12) NOTE 7 OIL AND GAS INFORM (13) NOTE 7 OIL AND GAS INFORM (14)!18 PAGE 407 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (6)Beneficial Ownership (6)PARKER PARSLEY 85B LTD (1)INDEX TO EXHIBITS (6)SELECTED FINANCIAL DATA (9) SUPPLEMENTAL INFORMATION (10)Balance Sheet (10)Income Statement (11) STATEMENTS OF PARTNERS CA (10)Cash Flows (11)NOTE 4 INCOME TAXES (7)! NOTE 5 OIL AND GAS PRODUC (20)! NOTE 5 OIL AND GAS PRODUC (21)! 9 PAGE 428 NOTE 6 RELATED PART! 9 PAGE 428 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (15) NOTE 7 OIL AND GAS INFORM (16) NOTE 7 OIL AND GAS INFORM (17)! 11 PAGE 430 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (10) SUPPLEMENTAL INFORMATION (11)Balance Sheet (11)Income Statement (12) STATEMENTS OF PARTNERS CA (11)Cash Flows (12) 8 PAGE 446 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (22)! NOTE 5 OIL AND GAS PRODUC (23)! 9 PAGE 447 NOTE 6 RELATED PART! 9 PAGE 447 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (18) NOTE 7 OIL AND GAS INFORM (19) NOTE 7 OIL AND GAS INFORM (20)! 11 PAGE 449 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (11) SUPPLEMENTAL INFORMATION (12)PARKER PARSLEY 86A LTD ITEM 6 SELECTED FINANCIAL (7)INDEX TO FINANCIAL STATEM (6)Balance Sheet (12)Income Statement (13) STATEMENTS OF PARTNERS CA (12)Cash Flows (13)NOTE 4 INCOME TAXES (8)! NOTE 5 OIL AND GAS PRODUC (24)! NOTE 5 OIL AND GAS PRODUC (25)! 16 PAGE 473 NOTE 6 RELATED PAR! 16 PAGE 473 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (21) NOTE 7 OIL AND GAS INFORM (22) NOTE 7 OIL AND GAS INFORM (23)!18 PAGE 475 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (7)Beneficial Ownership (7)PARKER PARSLEY 86A LTD (1)INDEX TO EXHIBITS (7)SELECTED FINANCIAL DATA (12) SUPPLEMENTAL INFORMATION (13)PARKER PARSLEY 86B LTD ITEM 6 SELECTED FINANCIAL (8)INDEX TO FINANCIAL STATEM (7)Balance Sheet (13)Income Statement (14) STATEMENTS OF PARTNERS CA (13)Cash Flows (14)!16 PAGE 503 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (26)! NOTE 5 OIL AND GAS PRODUC (27)! NOTE 6 RELATED PARTY TRANS (4)! NOTE 6 RELATED PARTY TRANS (5) NOTE 7 OIL AND GAS INFORM (24) NOTE 7 OIL AND GAS INFORM (25) NOTE 7 OIL AND GAS INFORM (26)!19 PAGE 506 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (8)Beneficial Ownership (8)PARKER PARSLEY 86B LTD (1)INDEX TO EXHIBITS (8)SELECTED FINANCIAL DATA (13) SUPPLEMENTAL INFORMATION (14) ITEM 6 SELECTED FINANCIAL (9)!7 PAGE 525 ITEM 8 FINANCIAL STABalance Sheet (14)Income Statement (15) STATEMENTS OF PARTNERS CA (14)Cash Flows (15)NOTE 4 INCOME TAXES (9)! NOTE 5 OIL AND GAS PRODUC (28)! NOTE 5 OIL AND GAS PRODUC (29)! 16 PAGE 534 NOTE 6 RELATED PAR! 16 PAGE 534 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (27) NOTE 7 OIL AND GAS INFORM (28) NOTE 7 OIL AND GAS INFORM (29)!18 PAGE 536 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (9)Beneficial Ownership (9)PARKER PARSLEY 86C LTDSELECTED FINANCIAL DATA (14) SUPPLEMENTAL INFORMATION (15)Balance Sheet (15)Income Statement (16) STATEMENTS OF PARTNERS CA (15)Cash Flows (16) 8 PAGE 556 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (30)! NOTE 5 OIL AND GAS PRODUC (31)! NOTE 6 RELATED PARTY TRANS (6)! NOTE 6 RELATED PARTY TRANS (7) NOTE 7 OIL AND GAS INFORM (30) NOTE 7 OIL AND GAS INFORM (31) NOTE 7 OIL AND GAS INFORM (32)! 11 PAGE 559 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (15) SUPPLEMENTAL INFORMATION (16)Balance Sheet (16)Income Statement (17) STATEMENTS OF PARTNERS CA (16)Cash Flows (17)NOTE 4 INCOME TAXES (10)! NOTE 5 OIL AND GAS PRODUC (32)! NOTE 5 OIL AND GAS PRODUC (33)! 9 PAGE 576 NOTE 6 RELATED PART! 9 PAGE 576 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (33) NOTE 7 OIL AND GAS INFORM (34) NOTE 7 OIL AND GAS INFORM (35)!11 PAGE 578 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (16) SUPPLEMENTAL INFORMATION (17) ITEM 6 SELECTED FINANCIAL (10)!8 PAGE 594 ITEM 8 FINANCIAL STABalance Sheet (17)Income Statement (18) STATEMENTS OF PARTNERS CA (17)Cash Flows (18)NOTE 4 INCOME TAXES (11)! NOTE 5 OIL AND GAS PRODUC (34)! NOTE 5 OIL AND GAS PRODUC (35)! 17 PAGE 603 NOTE 6 RELATED PAR! 17 PAGE 603 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (36) NOTE 7 OIL AND GAS INFORM (37) NOTE 7 OIL AND GAS INFORM (38)! 19 PAGE 605 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (10)Beneficial Ownership (10)PARKER PARSLEY 87A LTDSELECTED FINANCIAL DATA (17) SUPPLEMENTAL INFORMATION (18)Balance Sheet (18)Income Statement (19) STATEMENTS OF PARTNERS CA (18)Cash Flows (19) 8 PAGE 625 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (36)! NOTE 5 OIL AND GAS PRODUC (37)! 9 PAGE 626 NOTE 6 RELATED PART! 9 PAGE 626 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (39) NOTE 7 OIL AND GAS INFORM (40) NOTE 7 OIL AND GAS INFORM (41)! 11 PAGE 628 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (18) SUPPLEMENTAL INFORMATION (19) ITEM 6 SELECTED FINANCIAL (11)INDEX TO FINANCIAL STATEM (8)Balance Sheet (19)Income Statement (20) STATEMENTS OF PARTNERS CA (19)Cash Flows (20)NOTE 4 INCOME TAXES (12)! NOTE 5 OIL AND GAS PRODUC (38)! NOTE 5 OIL AND GAS PRODUC (39)! 17 PAGE 653 NOTE 6 RELATED PAR! 17 PAGE 653 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (42) NOTE 7 OIL AND GAS INFORM (43) NOTE 7 OIL AND GAS INFORM (44)! 19 PAGE 655 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (11)Beneficial Ownership (11)PARKER PARSLEY 87B LTDINDEX TO EXHIBITS (9)SELECTED FINANCIAL DATA (19) SUPPLEMENTAL INFORMATION (20) ITEM 6 SELECTED FINANCIAL (12)INDEX TO FINANCIAL STATEM (9)Balance Sheet (20)Income Statement (21) STATEMENTS OF PARTNERS CA (20)Cash Flows (21)!16 PAGE 683 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (40)! NOTE 5 OIL AND GAS PRODUC (41)! NOTE 6 RELATED PARTY TRANS (8)! NOTE 6 RELATED PARTY TRANS (9) NOTE 7 OIL AND GAS INFORM (45) NOTE 7 OIL AND GAS INFORM (46) NOTE 7 OIL AND GAS INFORM (47)!19 PAGE 686 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (12)Beneficial Ownership (12)PROPERTIES 87A LTDINDEX TO EXHIBITS (10)SELECTED FINANCIAL DATA (20) SUPPLEMENTAL INFORMATION (21) ITEM 6 SELECTED FINANCIAL (13)INDEX TO FINANCIAL STATE (10)Balance Sheet (21)Income Statement (22) STATEMENTS OF PARTNERS CA (21)Cash Flows (22)!16 PAGE 714 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (42)! NOTE 5 OIL AND GAS PRODUC (43)! 17 PAGE 715 NOTE 6 RELATED PAR! 17 PAGE 715 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (48) NOTE 7 OIL AND GAS INFORM (49) NOTE 7 OIL AND GAS INFORM (50)! 19 PAGE 717 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (13)Beneficial Ownership (13)PROPERTIES 87B LTDINDEX TO EXHIBITS (11)SELECTED FINANCIAL DATA (21) SUPPLEMENTAL INFORMATION (22)Balance Sheet (22)Income Statement (23) STATEMENTS OF PARTNERS CA (22)Cash Flows (23) 8 PAGE 737 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (44)! NOTE 5 OIL AND GAS PRODUC (45)! 9 PAGE 738 NOTE 6 RELATED PART! 9 PAGE 738 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (51) NOTE 7 OIL AND GAS INFORM (52) NOTE 7 OIL AND GAS INFORM (53)! 11 PAGE 740 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (22) SUPPLEMENTAL INFORMATION (23)Balance Sheet (23)Income Statement (24) STATEMENTS OF PARTNERS CA (23)Cash Flows (24) 8 PAGE 756 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (46)! NOTE 5 OIL AND GAS PRODUC (47)! 9 PAGE 757 NOTE 6 RELATED PART! 9 PAGE 757 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (54) NOTE 7 OIL AND GAS INFORM (55) NOTE 7 OIL AND GAS INFORM (56)! 11 PAGE 759 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (23)!31 2000 1 PAGE 766 PARKER PARSLPARKER PARSLEY 88A LP ITEM 6 SELECTED FINANCIAL (14)INDEX TO FINANCIAL STATE (11)Balance Sheet (24)Income Statement (25) STATEMENTS OF PARTNERS CA (24)Cash Flows (25)NOTE 4 INCOME TAXES (13)! NOTE 5 OIL AND GAS PRODUC (48)! NOTE 5 OIL AND GAS PRODUC (49)! 16 PAGE 783 NOTE 6 RELATED PAR! 16 PAGE 783 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (57) NOTE 7 OIL AND GAS INFORM (58) NOTE 7 OIL AND GAS INFORM (59)! 18 PAGE 785 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (14)Beneficial Ownership (14)PARKER PARSLEY 88A LP (1)INDEX TO EXHIBITS (12)SELECTED FINANCIAL DATA (24) SUPPLEMENTAL INFORMATION (24)Balance Sheet (25)Income Statement (26) STATEMENTS OF PARTNERS CA (25)Cash Flows (26) 8 PAGE 805 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (50)! NOTE 5 OIL AND GAS PRODUC (51)! 9 PAGE 806 NOTE 6 RELATED PART! 9 PAGE 806 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (60) NOTE 7 OIL AND GAS INFORM (61) NOTE 7 OIL AND GAS INFORM (62)! 11 PAGE 808 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (25)!31 2000 1 PAGE 815 PARKER PARSLPARKER PARSLEY 88B LP ITEM 6 SELECTED FINANCIAL (15)INDEX TO FINANCIAL STATE (12)Balance Sheet (26)Income Statement (27) STATEMENTS OF PARTNERS CA (26)Cash Flows (27)!16 PAGE 832 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (52)! NOTE 5 OIL AND GAS PRODUC (53)! 17 PAGE 833 NOTE 6 RELATED PAR! 17 PAGE 833 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (63) NOTE 7 OIL AND GAS INFORM (64) NOTE 7 OIL AND GAS INFORM (65)! 19 PAGE 835 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (15)Beneficial Ownership (15)PARKER PARSLEY 88B LP (1)INDEX TO EXHIBITS (13)SELECTED FINANCIAL DATA (26) SUPPLEMENTAL INFORMATION (25)Balance Sheet (27)Income Statement (28) STATEMENTS OF PARTNERS CA (27)Cash Flows (28) 8 PAGE 855 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (54)! NOTE 5 OIL AND GAS PRODUC (55)! 9 PAGE 856 NOTE 6 RELATED PART! 9 PAGE 856 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (66) NOTE 7 OIL AND GAS INFORM (67) NOTE 7 OIL AND GAS INFORM (68)! 11 PAGE 858 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (27)!31 2000 1 PAGE 865 PARKER PARSLBalance Sheet (28)Income Statement (29) STATEMENTS OF PARTNERS CA (28)Cash Flows (29) 8 PAGE 874 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (56)! NOTE 5 OIL AND GAS PRODUC (57)! 9 PAGE 875 NOTE 6 RELATED PART! 9 PAGE 875 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (69) NOTE 7 OIL AND GAS INFORM (70) NOTE 7 OIL AND GAS INFORM (71)! 11 PAGE 877 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (28) SUPPLEMENTAL INFORMATION (26)!PARKER PARSLEY PRODUCING PROPER ITEM 6 SELECTED FINANCIAL (16)INDEX TO FINANCIAL STATE (13)Balance Sheet (29)Income Statement (30) STATEMENTS OF PARTNERS CA (29)Cash Flows (30)NOTE 4 INCOME TAXES (14)! NOTE 5 OIL AND GAS PRODUC (58)! NOTE 5 OIL AND GAS PRODUC (59)! 16 PAGE 901 NOTE 6 RELATED PAR! 16 PAGE 901 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (72) NOTE 7 OIL AND GAS INFORM (73)!18 PAGE 903 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (16)Beneficial Ownership (16)PROPERTIES 88A LPINDEX TO EXHIBITS (14)SELECTED FINANCIAL DATA (29) SUPPLEMENTAL INFORMATION (27)Balance Sheet (30)Income Statement (31) STATEMENTS OF PARTNERS CA (30)Cash Flows (31)NOTE 4 INCOME TAXES (15)! NOTE 5 OIL AND GAS PRODUC (60)! NOTE 5 OIL AND GAS PRODUC (61)! 9 PAGE 924 NOTE 6 RELATED PART! 9 PAGE 924 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (74) NOTE 7 OIL AND GAS INFORM (75) NOTE 7 OIL AND GAS INFORM (76)! 11 PAGE 926 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (30) SUPPLEMENTAL INFORMATION (28)Balance Sheet (31)Income Statement (32) STATEMENTS OF PARTNERS CA (31)Cash Flows (32)NOTE 4 INCOME TAXES (16)! NOTE 5 OIL AND GAS PRODUC (62)! NOTE 5 OIL AND GAS PRODUC (63)! 9 PAGE 943 NOTE 6 RELATED PART! 9 PAGE 943 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (77) NOTE 7 OIL AND GAS INFORM (78) NOTE 7 OIL AND GAS INFORM (79)!11 PAGE 945 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (31)!31 2000 1 PAGE 952 PARKER PARSLPARKER PARSLEY 89A LP ITEM 6 SELECTED FINANCIAL (17)INDEX TO FINANCIAL STATE (14)Balance Sheet (32)Income Statement (33) STATEMENTS OF PARTNERS CA (32)Cash Flows (33)NOTE 4 INCOME TAXES (17)! NOTE 5 OIL AND GAS PRODUC (64)! NOTE 5 OIL AND GAS PRODUC (65)! 16 PAGE 969 NOTE 6 RELATED PAR! 16 PAGE 969 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (80) NOTE 7 OIL AND GAS INFORM (81) NOTE 7 OIL AND GAS INFORM (82) NOTE 7 OIL AND GAS INFORM (83)! 18 PAGE 971 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (17)Beneficial Ownership (17)PARKER PARSLEY 89A LP (1)INDEX TO EXHIBITS (15)SELECTED FINANCIAL DATA (32) SUPPLEMENTAL INFORMATION (29)Balance Sheet (33)Income Statement (34) STATEMENTS OF PARTNERS CA (33)Cash Flows (34) 8 PAGE 991 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (66)! NOTE 5 OIL AND GAS PRODUC (67)! 9 PAGE 992 NOTE 6 RELATED PART! 9 PAGE 992 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (84) NOTE 7 OIL AND GAS INFORM (85) NOTE 7 OIL AND GAS INFORM (86)! 11 PAGE 994 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (33)!31 2000 1 PAGE 1001 PARKER PARSBalance Sheet (34)Income Statement (35) STATEMENTS OF PARTNERS CA (34)Cash Flows (35)!8 PAGE 1010 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (68)! NOTE 5 OIL AND GAS PRODUC (69)! 9 PAGE 1011 NOTE 6 RELATED PAR! 9 PAGE 1011 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (87) NOTE 7 OIL AND GAS INFORM (88) NOTE 7 OIL AND GAS INFORM (89)!11 PAGE 1013 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (34) SUPPLEMENTAL INFORMATION (30)Balance Sheet (35)Income Statement (36) STATEMENTS OF PARTNERS CA (35)Cash Flows (36)!8 PAGE 1029 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (70)! NOTE 5 OIL AND GAS PRODUC (71)! 9 PAGE 1030 NOTE 6 RELATED PAR! 9 PAGE 1030 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (90) NOTE 7 OIL AND GAS INFORM (91) NOTE 7 OIL AND GAS INFORM (92)! 11 PAGE 1032 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (35) SUPPLEMENTAL INFORMATION (31)Balance Sheet (36)Income Statement (37) STATEMENTS OF PARTNERS CA (36)Cash Flows (37)!8 PAGE 1048 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (72)! NOTE 5 OIL AND GAS PRODUC (73)! 9 PAGE 1049 NOTE 6 RELATED PAR! 9 PAGE 1049 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (93) NOTE 7 OIL AND GAS INFORM (94) NOTE 7 OIL AND GAS INFORM (95)! 11 PAGE 1051 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (36)!31 2000 1 PAGE 1058 PARKER PARSPARKER PARSLEY 90A LP ITEM 6 SELECTED FINANCIAL (18)INDEX TO FINANCIAL STATE (15)Balance Sheet (37)Income Statement (38) STATEMENTS OF PARTNERS CA (37)Cash Flows (38)!15 PAGE 1074 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (74)! NOTE 5 OIL AND GAS PRODUC (75)! NOTE 6 RELATED PARTY TRAN (10)! NOTE 6 RELATED PARTY TRAN (11) NOTE 7 OIL AND GAS INFORM (96) NOTE 7 OIL AND GAS INFORM (97)! 18 PAGE 1077 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (18)Beneficial Ownership (18)PARKER PARSLEY 90A LP (1)INDEX TO EXHIBITS (16)SELECTED FINANCIAL DATA (37) SUPPLEMENTAL INFORMATION (32)PARKER PARSLEY 90B CONV LP ITEM 6 SELECTED FINANCIAL (19)INDEX TO FINANCIAL STATE (16)Balance Sheet (38)Income Statement (39) STATEMENTS OF PARTNERS CA (38)Cash Flows (39)!16 PAGE 1105 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (76)! NOTE 5 OIL AND GAS PRODUC (77)! NOTE 6 RELATED PARTY TRAN (12)! NOTE 6 RELATED PARTY TRAN (13) NOTE 7 OIL AND GAS INFORM (98) NOTE 7 OIL AND GAS INFORM (99) NOTE 7 OIL AND GAS INFOR (100)! 19 PAGE 1108 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (19)Beneficial Ownership (19) PARKER PARSLEY 90B CONV LP (1)INDEX TO EXHIBITS (17)SELECTED FINANCIAL DATA (38)!31 2000 1 PAGE 1119 PARKER PARSPARKER PARSLEY 90B LP ITEM 6 SELECTED FINANCIAL (20)INDEX TO FINANCIAL STATE (17)Balance Sheet (39)Income Statement (40) STATEMENTS OF PARTNERS CA (39)Cash Flows (40)!16 PAGE 1136 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (78)! NOTE 5 OIL AND GAS PRODUC (79)! NOTE 6 RELATED PARTY TRAN (14)! NOTE 6 RELATED PARTY TRAN (15) NOTE 7 OIL AND GAS INFOR (101) NOTE 7 OIL AND GAS INFOR (102) NOTE 7 OIL AND GAS INFOR (103)! 19 PAGE 1139 NOTE 8 MAJOR CUS!ITEM 10 DIRECTORS AND EXEC (20)Beneficial Ownership (20)PARKER PARSLEY 90B LP (1)INDEX TO EXHIBITS (18)SELECTED FINANCIAL DATA (39) SUPPLEMENTAL INFORMATION (33)PARKER PARSLEY 90C CONV LP ITEM 6 SELECTED FINANCIAL (21)INDEX TO FINANCIAL STATE (18)Balance Sheet (40)Income Statement (41) STATEMENTS OF PARTNERS CA (40)Cash Flows (41)!15 PAGE 1166 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (80)! NOTE 5 OIL AND GAS PRODUC (81)! NOTE 6 RELATED PARTY TRAN (16)! NOTE 6 RELATED PARTY TRAN (17) NOTE 7 OIL AND GAS INFOR (104) NOTE 7 OIL AND GAS INFOR (105) NOTE 7 OIL AND GAS INFOR (106)! 18 PAGE 1169 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (21)Beneficial Ownership (21) PARKER PARSLEY 90C CONV LP (1)INDEX TO EXHIBITS (19)SELECTED FINANCIAL DATA (40)!31 2000 1 PAGE 1180 PARKER PARSPARKER PARSLEY 90C LP ITEM 6 SELECTED FINANCIAL (22)INDEX TO FINANCIAL STATE (19)Balance Sheet (41)Income Statement (42) STATEMENTS OF PARTNERS CA (41)Cash Flows (42)!15 PAGE 1196 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (82)! NOTE 5 OIL AND GAS PRODUC (83)! NOTE 6 RELATED PARTY TRAN (18)! NOTE 6 RELATED PARTY TRAN (19) NOTE 7 OIL AND GAS INFOR (107) NOTE 7 OIL AND GAS INFOR (108) NOTE 7 OIL AND GAS INFOR (109)! 18 PAGE 1199 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (22)Beneficial Ownership (22)PARKER PARSLEY 90C LP (1)INDEX TO EXHIBITS (20)SELECTED FINANCIAL DATA (41) SUPPLEMENTAL INFORMATION (34)Balance Sheet (42)Income Statement (43) STATEMENTS OF PARTNERS CA (42)Cash Flows (43)!8 PAGE 1219 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (84)! NOTE 5 OIL AND GAS PRODUC (85)! 9 PAGE 1220 NOTE 6 RELATED PAR! 9 PAGE 1220 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (110) NOTE 7 OIL AND GAS INFOR (111) NOTE 7 OIL AND GAS INFOR (112)! 11 PAGE 1222 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (42) SUPPLEMENTAL INFORMATION (35)Balance Sheet (43)Income Statement (44) STATEMENTS OF PARTNERS CA (43)Cash Flows (44)!8 PAGE 1238 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (86)! NOTE 5 OIL AND GAS PRODUC (87)! 9 PAGE 1239 NOTE 6 RELATED PAR! 9 PAGE 1239 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (113) NOTE 7 OIL AND GAS INFOR (114) NOTE 7 OIL AND GAS INFOR (115)! 11 PAGE 1241 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (43)!31 2000 1 PAGE 1248 PARKER PARSPARKER PARSLEY 91A LP ITEM 6 SELECTED FINANCIAL (23)INDEX TO FINANCIAL STATE (20)Balance Sheet (44)Income Statement (45) STATEMENTS OF PARTNERS CA (44)Cash Flows (45)!15 PAGE 1264 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (88)! NOTE 5 OIL AND GAS PRODUC (89)! NOTE 6 RELATED PARTY TRAN (20)! NOTE 6 RELATED PARTY TRAN (21) NOTE 7 OIL AND GAS INFOR (116) NOTE 7 OIL AND GAS INFOR (117) NOTE 7 OIL AND GAS INFOR (118)! 18 PAGE 1267 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (23)Beneficial Ownership (23)PARKER PARSLEY 91A LP (1)INDEX TO EXHIBITS (21)SELECTED FINANCIAL DATA (44)!31 2000 1 PAGE 1278 PARKER PARSPARKER PARSLEY 91B LP ITEM 6 SELECTED FINANCIAL (24)INDEX TO FINANCIAL STATE (21)Balance Sheet (45)Income Statement (46) STATEMENTS OF PARTNERS CA (45)Cash Flows (46)!15 PAGE 1294 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (90)! NOTE 5 OIL AND GAS PRODUC (91)! NOTE 6 RELATED PARTY TRAN (22)! NOTE 6 RELATED PARTY TRAN (23) NOTE 7 OIL AND GAS INFOR (119) NOTE 7 OIL AND GAS INFOR (120) NOTE 7 OIL AND GAS INFOR (121)! 18 PAGE 1297 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (24)Beneficial Ownership (24)PARKER PARSLEY 91B LP (1)INDEX TO EXHIBITS (22)SELECTED FINANCIAL DATA (45)POWER OF ATTORNEYPOWER OF ATTORNEY (1)POWER OF ATTORNEY (2)POWER OF ATTORNEY (3)POWER OF ATTORNEY (4)POWER OF ATTORNEY (5)POWER OF ATTORNEY (6)POWER OF ATTORNEY (7)!2001 THE BOARD OF DIRECTORS REC!2001 THE BOARD OF DIRECTORS (1)!2001 THE BOARD OF DIRECTORS (2)PAGE 2U } =}      $PIONEER NATURAL RESOURCES CO S-4 04/17/2001A9-25- 35 REASONS FOR THE MERGER OF EACH PARTNERSHIP 9 1 Parker & Parsley 81-I, Ltd. 5.84%9 1 Parker & Parsley 82-1, Ltd. 10.73%; 3 Parker & Parsley 82-III, Ltd. 5.97%$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/(TbVJ>2&9-!=PF0*8X> @ l  $Y 8Z  dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/?? SECURITIES AND EXC!CALCULATION OF REGISTRATION FEETO BE HELD ON 2001TABLE OF CONTENTSPAGE 7 LIST OF APPENDICES!LIMITED PARTNER INVESTMENT REPA!LIMITED PARTNER INVESTMENT (1) 5 PAGE 15 NYMEX FUTURES PRICES!EXAMPLE CALCULATION OF MERGER VIncome StatementIncome Statement (1)AT DECEMBER 31 2000!15 PAGE 25 COMPARATIVE PER SHAR!25 PAGE 35 REASONS FOR THE MERGFAIRNESS OPINION (1)!LEGAL OPINION FOR LIMITED PARTN!LEGAL OPINION FOR LIMITED P (1)!NONMANAGING GENERAL PARTNERS OF!49 PAGE 59 PAYMENT OF EXPENSES !58 PAGE 68 COMPARATIVE PER SHAR!60 PAGE 70 OWNERSHIP OF PARTNER PIONEER PIONEER USATHE DRILLING PARTNERSHIPSTHE DRILLING PARTNERSHIPS (1)THE INCOME PARTNERSHIPS INTERESTSINTERESTS (1)INTERESTS (2)INTERESTS (3)INTERESTS (4)INTERESTS (5)!WHERE YOU CAN FIND MORE INFORMAAS OF DECEMBER 31 2000YEAR ENDED DECEMBER 31 2000!QUANTITIES OF OIL AND GAS RESER!STANDARDIZED MEASURE OF DISCOUN CASH FLOWSAS OF MARCH 31 2001AS OF MARCH 31 2001 (1)AS OF MARCH 31 2001 (2)AS OF MARCH 31 2001 (3)AS OF MARCH 31 2001 (4)AS OF MARCH 31 2001 (5)!FROM INCEPTION THROUGH MARCH 31!ANNUAL REPURCHASE PRICES AND AGOF EACH PARTNERSHIP!FOR THE THREE MONTHS ENDED MARCAS OF DECEMBER 31 2000 (1)AS OF MARCH 31 2001 (6)!THE YEARS ENDED DECEMBER 31 200AS OF DECEMBER 31 2000 (2)DECEMBER 31 2000 AND 1999EFFECTIVE DECEMBER 31 2000 EFFECTIVE DECEMBER 31 2000 (1) RECITALS RECITALS (1) SUPPLEMENTAL INFORMATION TABLEBalance SheetIncome Statement (2) STATEMENTS OF PARTNERS CAPITALCash Flows (1)NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCING A! NOTE 5 OIL AND GAS PRODUCI (1)! NOTE 6 RELATED PARTY TRANSACTI! NOTE 6 RELATED PARTY TRANS (1)! NOTE 7 OIL AND GAS INFORMATION! NOTE 7 OIL AND GAS INFORMA (1)! NOTE 7 OIL AND GAS INFORMA (2)!11 PAGE 163 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA SUPPLEMENTAL INFORMATION T (1)Balance Sheet (1)Income Statement (3) STATEMENTS OF PARTNERS CAP (1)Cash Flows (2)NOTE 4 INCOME TAXES (1)! NOTE 5 OIL AND GAS PRODUCI (2)! NOTE 5 OIL AND GAS PRODUCI (3)! 9 PAGE 180 NOTE 6 RELATED PAR! 9 PAGE 180 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORMA (3)! NOTE 7 OIL AND GAS INFORMA (4)! NOTE 7 OIL AND GAS INFORMA (5)!11 PAGE 182 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (1) SUPPLEMENTAL INFORMATION T (2) ITEM 6 SELECTED FINANCIAL DATAINDEX TO FINANCIAL STATEMENTSBalance Sheet (2)Income Statement (4) STATEMENTS OF PARTNERS CAP (2)Cash Flows (3)!15 PAGE 205 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCI (4)! NOTE 5 OIL AND GAS PRODUCI (5)! NOTE 6 RELATED PARTY TRANS (2)! NOTE 6 RELATED PARTY TRANS (3)! NOTE 7 OIL AND GAS INFORMA (6)! NOTE 7 OIL AND GAS INFORMA (7)! NOTE 7 OIL AND GAS INFORMA (8)! NOTE 7 OIL AND GAS INFORMA (9)! NOTE 7 OIL AND GAS INFORM (10)! 18 PAGE 208 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECUTIVEBeneficial OwnershipPARKER PARSLEY 82I LTDINDEX TO EXHIBITSSELECTED FINANCIAL DATA (2) SUPPLEMENTAL INFORMATION T (3) ITEM 6 SELECTED FINANCIAL (1)INDEX TO FINANCIAL STATEM (1)Balance Sheet (3)Income Statement (5) STATEMENTS OF PARTNERS CAP (3)Cash Flows (4)NOTE 4 INCOME TAXES (2)! NOTE 5 OIL AND GAS PRODUCI (6)! NOTE 5 OIL AND GAS PRODUCI (7)! 16 PAGE 236 NOTE 6 RELATED PAR! 16 PAGE 236 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (11)! NOTE 7 OIL AND GAS INFORM (12)! NOTE 7 OIL AND GAS INFORM (13)!18 PAGE 238 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (1)Beneficial Ownership (1)PARKER PARSLEY 82II LTDINDEX TO EXHIBITS (1)SELECTED FINANCIAL DATA (3) SUPPLEMENTAL INFORMATION T (4)Balance Sheet (4)Income Statement (6) STATEMENTS OF PARTNERS CAP (4)Cash Flows (5)NOTE 4 INCOME TAXES (3)! NOTE 5 OIL AND GAS PRODUCI (8)! NOTE 5 OIL AND GAS PRODUCI (9)! 9 PAGE 259 NOTE 6 RELATED PART! 9 PAGE 259 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (14)! NOTE 7 OIL AND GAS INFORM (15)! NOTE 7 OIL AND GAS INFORM (16)!11 PAGE 261 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (4) SUPPLEMENTAL INFORMATION T (5)PARKER PARSLEY 83A LTD ITEM 6 SELECTED FINANCIAL (2)INDEX TO FINANCIAL STATEM (2)Balance Sheet (5)Income Statement (7) STATEMENTS OF PARTNERS CAP (5)Cash Flows (6)NOTE 4 INCOME TAXES (4)! NOTE 5 OIL AND GAS PRODUC (10)! NOTE 5 OIL AND GAS PRODUC (11)! 16 PAGE 285 NOTE 6 RELATED PAR! 16 PAGE 285 NOTE 6 RELATED (1)!NOTE 7 OIL AND GAS INFORMATION  NOTE 7 OIL AND GAS INFORMA (1) NOTE 7 OIL AND GAS INFORMA (2)! 18 PAGE 287 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECU (2)Beneficial Ownership (2)PARKER PARSLEY 83A LTD (1)INDEX TO EXHIBITS (2)SELECTED FINANCIAL DATA (5) SUPPLEMENTAL INFORMATION T (6)PARKER PARSLEY 83B LTD ITEM 6 SELECTED FINANCIAL (3)INDEX TO FINANCIAL STATEM (3)Balance Sheet (6)Income Statement (8) STATEMENTS OF PARTNERS CAP (6)Cash Flows (7)NOTE 4 INCOME TAXES (5)! NOTE 5 OIL AND GAS PRODUC (12)! NOTE 5 OIL AND GAS PRODUC (13)! 16 PAGE 315 NOTE 6 RELATED PAR! 16 PAGE 315 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (3) NOTE 7 OIL AND GAS INFORMA (4) NOTE 7 OIL AND GAS INFORMA (5)!18 PAGE 317 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (3)Beneficial Ownership (3)PARKER PARSLEY 83B LTD (1)INDEX TO EXHIBITS (3)SELECTED FINANCIAL DATA (6) SUPPLEMENTAL INFORMATION T (7)PARKER PARSLEY 84A LTD ITEM 6 SELECTED FINANCIAL (4)INDEX TO FINANCIAL STATEM (4)Balance Sheet (7)Income Statement (9) STATEMENTS OF PARTNERS CAP (7)Cash Flows (8)!15 PAGE 344 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (14)! NOTE 5 OIL AND GAS PRODUC (15)! 16 PAGE 345 NOTE 6 RELATED PAR! 16 PAGE 345 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (6) NOTE 7 OIL AND GAS INFORMA (7) NOTE 7 OIL AND GAS INFORMA (8)!18 PAGE 347 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (4)Beneficial Ownership (4)PARKER PARSLEY 84A LTD (1)INDEX TO EXHIBITS (4)SELECTED FINANCIAL DATA (7) SUPPLEMENTAL INFORMATION T (8)PARKER PARSLEY 85A LTD ITEM 6 SELECTED FINANCIAL (5)INDEX TO FINANCIAL STATEM (5)Balance Sheet (8)Income Statement (10) STATEMENTS OF PARTNERS CAP (8)Cash Flows (9)NOTE 4 INCOME TAXES (6)! NOTE 5 OIL AND GAS PRODUC (16)! NOTE 5 OIL AND GAS PRODUC (17)! 16 PAGE 375 NOTE 6 RELATED PAR! 16 PAGE 375 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (9) NOTE 7 OIL AND GAS INFORM (10) NOTE 7 OIL AND GAS INFORM (11)!18 PAGE 377 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (5)Beneficial Ownership (5)PARKER PARSLEY 85A LTD (1)INDEX TO EXHIBITS (5)SELECTED FINANCIAL DATA (8) SUPPLEMENTAL INFORMATION T (9)PARKER PARSLEY 85B LTD ITEM 6 SELECTED FINANCIAL (6)!7 PAGE 396 ITEM 8 FINANCIAL STABalance Sheet (9) STATEMENTS OF PARTNERS CAP (9)Cash Flows (10)!15 PAGE 404 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (18)! NOTE 5 OIL AND GAS PRODUC (19)! 16 PAGE 405 NOTE 6 RELATED PAR! 16 PAGE 405 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (12) NOTE 7 OIL AND GAS INFORM (13) NOTE 7 OIL AND GAS INFORM (14)!18 PAGE 407 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (6)Beneficial Ownership (6)PARKER PARSLEY 85B LTD (1)INDEX TO EXHIBITS (6)SELECTED FINANCIAL DATA (9) SUPPLEMENTAL INFORMATION (10)Balance Sheet (10)Income Statement (11) STATEMENTS OF PARTNERS CA (10)Cash Flows (11)NOTE 4 INCOME TAXES (7)! NOTE 5 OIL AND GAS PRODUC (20)! NOTE 5 OIL AND GAS PRODUC (21)! 9 PAGE 428 NOTE 6 RELATED PART! 9 PAGE 428 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (15) NOTE 7 OIL AND GAS INFORM (16) NOTE 7 OIL AND GAS INFORM (17)! 11 PAGE 430 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (10) SUPPLEMENTAL INFORMATION (11)Balance Sheet (11)Income Statement (12) STATEMENTS OF PARTNERS CA (11)Cash Flows (12) 8 PAGE 446 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (22)! NOTE 5 OIL AND GAS PRODUC (23)! 9 PAGE 447 NOTE 6 RELATED PART! 9 PAGE 447 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (18) NOTE 7 OIL AND GAS INFORM (19) NOTE 7 OIL AND GAS INFORM (20)! 11 PAGE 449 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (11) SUPPLEMENTAL INFORMATION (12)PARKER PARSLEY 86A LTD ITEM 6 SELECTED FINANCIAL (7)INDEX TO FINANCIAL STATEM (6)Balance Sheet (12)Income Statement (13) STATEMENTS OF PARTNERS CA (12)Cash Flows (13)NOTE 4 INCOME TAXES (8)! NOTE 5 OIL AND GAS PRODUC (24)! NOTE 5 OIL AND GAS PRODUC (25)! 16 PAGE 473 NOTE 6 RELATED PAR! 16 PAGE 473 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (21) NOTE 7 OIL AND GAS INFORM (22) NOTE 7 OIL AND GAS INFORM (23)!18 PAGE 475 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (7)Beneficial Ownership (7)PARKER PARSLEY 86A LTD (1)INDEX TO EXHIBITS (7)SELECTED FINANCIAL DATA (12) SUPPLEMENTAL INFORMATION (13)PARKER PARSLEY 86B LTD ITEM 6 SELECTED FINANCIAL (8)INDEX TO FINANCIAL STATEM (7)Balance Sheet (13)Income Statement (14) STATEMENTS OF PARTNERS CA (13)Cash Flows (14)!16 PAGE 503 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (26)! NOTE 5 OIL AND GAS PRODUC (27)! NOTE 6 RELATED PARTY TRANS (4)! NOTE 6 RELATED PARTY TRANS (5) NOTE 7 OIL AND GAS INFORM (24) NOTE 7 OIL AND GAS INFORM (25) NOTE 7 OIL AND GAS INFORM (26)!19 PAGE 506 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (8)Beneficial Ownership (8)PARKER PARSLEY 86B LTD (1)INDEX TO EXHIBITS (8)SELECTED FINANCIAL DATA (13) SUPPLEMENTAL INFORMATION (14) ITEM 6 SELECTED FINANCIAL (9)!7 PAGE 525 ITEM 8 FINANCIAL STABalance Sheet (14)Income Statement (15) STATEMENTS OF PARTNERS CA (14)Cash Flows (15)NOTE 4 INCOME TAXES (9)! NOTE 5 OIL AND GAS PRODUC (28)! NOTE 5 OIL AND GAS PRODUC (29)! 16 PAGE 534 NOTE 6 RELATED PAR! 16 PAGE 534 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (27) NOTE 7 OIL AND GAS INFORM (28) NOTE 7 OIL AND GAS INFORM (29)!18 PAGE 536 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (9)Beneficial Ownership (9)PARKER PARSLEY 86C LTDSELECTED FINANCIAL DATA (14) SUPPLEMENTAL INFORMATION (15)Balance Sheet (15)Income Statement (16) STATEMENTS OF PARTNERS CA (15)Cash Flows (16) 8 PAGE 556 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (30)! NOTE 5 OIL AND GAS PRODUC (31)! NOTE 6 RELATED PARTY TRANS (6)! NOTE 6 RELATED PARTY TRANS (7) NOTE 7 OIL AND GAS INFORM (30) NOTE 7 OIL AND GAS INFORM (31) NOTE 7 OIL AND GAS INFORM (32)! 11 PAGE 559 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (15) SUPPLEMENTAL INFORMATION (16)Balance Sheet (16)Income Statement (17) STATEMENTS OF PARTNERS CA (16)Cash Flows (17)NOTE 4 INCOME TAXES (10)! NOTE 5 OIL AND GAS PRODUC (32)! NOTE 5 OIL AND GAS PRODUC (33)! 9 PAGE 576 NOTE 6 RELATED PART! 9 PAGE 576 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (33) NOTE 7 OIL AND GAS INFORM (34) NOTE 7 OIL AND GAS INFORM (35)!11 PAGE 578 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (16) SUPPLEMENTAL INFORMATION (17) ITEM 6 SELECTED FINANCIAL (10)!8 PAGE 594 ITEM 8 FINANCIAL STABalance Sheet (17)Income Statement (18) STATEMENTS OF PARTNERS CA (17)Cash Flows (18)NOTE 4 INCOME TAXES (11)! NOTE 5 OIL AND GAS PRODUC (34)! NOTE 5 OIL AND GAS PRODUC (35)! 17 PAGE 603 NOTE 6 RELATED PAR! 17 PAGE 603 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (36) NOTE 7 OIL AND GAS INFORM (37) NOTE 7 OIL AND GAS INFORM (38)! 19 PAGE 605 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (10)Beneficial Ownership (10)PARKER PARSLEY 87A LTDSELECTED FINANCIAL DATA (17) SUPPLEMENTAL INFORMATION (18)Balance Sheet (18)Income Statement (19) STATEMENTS OF PARTNERS CA (18)Cash Flows (19) 8 PAGE 625 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (36)! NOTE 5 OIL AND GAS PRODUC (37)! 9 PAGE 626 NOTE 6 RELATED PART! 9 PAGE 626 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (39) NOTE 7 OIL AND GAS INFORM (40) NOTE 7 OIL AND GAS INFORM (41)! 11 PAGE 628 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (18) SUPPLEMENTAL INFORMATION (19) ITEM 6 SELECTED FINANCIAL (11)INDEX TO FINANCIAL STATEM (8)Balance Sheet (19)Income Statement (20) STATEMENTS OF PARTNERS CA (19)Cash Flows (20)NOTE 4 INCOME TAXES (12)! NOTE 5 OIL AND GAS PRODUC (38)! NOTE 5 OIL AND GAS PRODUC (39)! 17 PAGE 653 NOTE 6 RELATED PAR! 17 PAGE 653 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (42) NOTE 7 OIL AND GAS INFORM (43) NOTE 7 OIL AND GAS INFORM (44)! 19 PAGE 655 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (11)Beneficial Ownership (11)PARKER PARSLEY 87B LTDINDEX TO EXHIBITS (9)SELECTED FINANCIAL DATA (19) SUPPLEMENTAL INFORMATION (20) ITEM 6 SELECTED FINANCIAL (12)INDEX TO FINANCIAL STATEM (9)Balance Sheet (20)Income Statement (21) STATEMENTS OF PARTNERS CA (20)Cash Flows (21)!16 PAGE 683 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (40)! NOTE 5 OIL AND GAS PRODUC (41)! NOTE 6 RELATED PARTY TRANS (8)! NOTE 6 RELATED PARTY TRANS (9) NOTE 7 OIL AND GAS INFORM (45) NOTE 7 OIL AND GAS INFORM (46) NOTE 7 OIL AND GAS INFORM (47)!19 PAGE 686 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (12)Beneficial Ownership (12)PROPERTIES 87A LTDINDEX TO EXHIBITS (10)SELECTED FINANCIAL DATA (20) SUPPLEMENTAL INFORMATION (21) ITEM 6 SELECTED FINANCIAL (13)INDEX TO FINANCIAL STATE (10)Balance Sheet (21)Income Statement (22) STATEMENTS OF PARTNERS CA (21)Cash Flows (22)!16 PAGE 714 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (42)! NOTE 5 OIL AND GAS PRODUC (43)! 17 PAGE 715 NOTE 6 RELATED PAR! 17 PAGE 715 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (48) NOTE 7 OIL AND GAS INFORM (49) NOTE 7 OIL AND GAS INFORM (50)! 19 PAGE 717 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (13)Beneficial Ownership (13)PROPERTIES 87B LTDINDEX TO EXHIBITS (11)SELECTED FINANCIAL DATA (21) SUPPLEMENTAL INFORMATION (22)Balance Sheet (22)Income Statement (23) STATEMENTS OF PARTNERS CA (22)Cash Flows (23) 8 PAGE 737 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (44)! NOTE 5 OIL AND GAS PRODUC (45)! 9 PAGE 738 NOTE 6 RELATED PART! 9 PAGE 738 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (51) NOTE 7 OIL AND GAS INFORM (52) NOTE 7 OIL AND GAS INFORM (53)! 11 PAGE 740 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (22) SUPPLEMENTAL INFORMATION (23)Balance Sheet (23)Income Statement (24) STATEMENTS OF PARTNERS CA (23)Cash Flows (24) 8 PAGE 756 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (46)! NOTE 5 OIL AND GAS PRODUC (47)! 9 PAGE 757 NOTE 6 RELATED PART! 9 PAGE 757 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (54) NOTE 7 OIL AND GAS INFORM (55) NOTE 7 OIL AND GAS INFORM (56)! 11 PAGE 759 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (23)!31 2000 1 PAGE 766 PARKER PARSLPARKER PARSLEY 88A LP ITEM 6 SELECTED FINANCIAL (14)INDEX TO FINANCIAL STATE (11)Balance Sheet (24)Income Statement (25) STATEMENTS OF PARTNERS CA (24)Cash Flows (25)NOTE 4 INCOME TAXES (13)! NOTE 5 OIL AND GAS PRODUC (48)! NOTE 5 OIL AND GAS PRODUC (49)! 16 PAGE 783 NOTE 6 RELATED PAR! 16 PAGE 783 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (57) NOTE 7 OIL AND GAS INFORM (58) NOTE 7 OIL AND GAS INFORM (59)! 18 PAGE 785 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (14)Beneficial Ownership (14)PARKER PARSLEY 88A LP (1)INDEX TO EXHIBITS (12)SELECTED FINANCIAL DATA (24) SUPPLEMENTAL INFORMATION (24)Balance Sheet (25)Income Statement (26) STATEMENTS OF PARTNERS CA (25)Cash Flows (26) 8 PAGE 805 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (50)! NOTE 5 OIL AND GAS PRODUC (51)! 9 PAGE 806 NOTE 6 RELATED PART! 9 PAGE 806 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (60) NOTE 7 OIL AND GAS INFORM (61) NOTE 7 OIL AND GAS INFORM (62)! 11 PAGE 808 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (25)!31 2000 1 PAGE 815 PARKER PARSLPARKER PARSLEY 88B LP ITEM 6 SELECTED FINANCIAL (15)INDEX TO FINANCIAL STATE (12)Balance Sheet (26)Income Statement (27) STATEMENTS OF PARTNERS CA (26)Cash Flows (27)!16 PAGE 832 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (52)! NOTE 5 OIL AND GAS PRODUC (53)! 17 PAGE 833 NOTE 6 RELATED PAR! 17 PAGE 833 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (63) NOTE 7 OIL AND GAS INFORM (64) NOTE 7 OIL AND GAS INFORM (65)! 19 PAGE 835 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (15)Beneficial Ownership (15)PARKER PARSLEY 88B LP (1)INDEX TO EXHIBITS (13)SELECTED FINANCIAL DATA (26) SUPPLEMENTAL INFORMATION (25)Balance Sheet (27)Income Statement (28) STATEMENTS OF PARTNERS CA (27)Cash Flows (28) 8 PAGE 855 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (54)! NOTE 5 OIL AND GAS PRODUC (55)! 9 PAGE 856 NOTE 6 RELATED PART! 9 PAGE 856 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (66) NOTE 7 OIL AND GAS INFORM (67) NOTE 7 OIL AND GAS INFORM (68)! 11 PAGE 858 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (27)!31 2000 1 PAGE 865 PARKER PARSLBalance Sheet (28)Income Statement (29) STATEMENTS OF PARTNERS CA (28)Cash Flows (29) 8 PAGE 874 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (56)! NOTE 5 OIL AND GAS PRODUC (57)! 9 PAGE 875 NOTE 6 RELATED PART! 9 PAGE 875 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (69) NOTE 7 OIL AND GAS INFORM (70) NOTE 7 OIL AND GAS INFORM (71)! 11 PAGE 877 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (28) SUPPLEMENTAL INFORMATION (26)!PARKER PARSLEY PRODUCING PROPER ITEM 6 SELECTED FINANCIAL (16)INDEX TO FINANCIAL STATE (13)Balance Sheet (29)Income Statement (30) STATEMENTS OF PARTNERS CA (29)Cash Flows (30)NOTE 4 INCOME TAXES (14)! NOTE 5 OIL AND GAS PRODUC (58)! NOTE 5 OIL AND GAS PRODUC (59)! 16 PAGE 901 NOTE 6 RELATED PAR! 16 PAGE 901 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (72) NOTE 7 OIL AND GAS INFORM (73)!18 PAGE 903 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (16)Beneficial Ownership (16)PROPERTIES 88A LPINDEX TO EXHIBITS (14)SELECTED FINANCIAL DATA (29) SUPPLEMENTAL INFORMATION (27)Balance Sheet (30)Income Statement (31) STATEMENTS OF PARTNERS CA (30)Cash Flows (31)NOTE 4 INCOME TAXES (15)! NOTE 5 OIL AND GAS PRODUC (60)! NOTE 5 OIL AND GAS PRODUC (61)! 9 PAGE 924 NOTE 6 RELATED PART! 9 PAGE 924 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (74) NOTE 7 OIL AND GAS INFORM (75) NOTE 7 OIL AND GAS INFORM (76)! 11 PAGE 926 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (30) SUPPLEMENTAL INFORMATION (28)Balance Sheet (31)Income Statement (32) STATEMENTS OF PARTNERS CA (31)Cash Flows (32)NOTE 4 INCOME TAXES (16)! NOTE 5 OIL AND GAS PRODUC (62)! NOTE 5 OIL AND GAS PRODUC (63)! 9 PAGE 943 NOTE 6 RELATED PART! 9 PAGE 943 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (77) NOTE 7 OIL AND GAS INFORM (78) NOTE 7 OIL AND GAS INFORM (79)!11 PAGE 945 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (31)!31 2000 1 PAGE 952 PARKER PARSLPARKER PARSLEY 89A LP ITEM 6 SELECTED FINANCIAL (17)INDEX TO FINANCIAL STATE (14)Balance Sheet (32)Income Statement (33) STATEMENTS OF PARTNERS CA (32)Cash Flows (33)NOTE 4 INCOME TAXES (17)! NOTE 5 OIL AND GAS PRODUC (64)! NOTE 5 OIL AND GAS PRODUC (65)! 16 PAGE 969 NOTE 6 RELATED PAR! 16 PAGE 969 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (80) NOTE 7 OIL AND GAS INFORM (81) NOTE 7 OIL AND GAS INFORM (82) NOTE 7 OIL AND GAS INFORM (83)! 18 PAGE 971 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (17)Beneficial Ownership (17)PARKER PARSLEY 89A LP (1)INDEX TO EXHIBITS (15)SELECTED FINANCIAL DATA (32) SUPPLEMENTAL INFORMATION (29)Balance Sheet (33)Income Statement (34) STATEMENTS OF PARTNERS CA (33)Cash Flows (34) 8 PAGE 991 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (66)! NOTE 5 OIL AND GAS PRODUC (67)! 9 PAGE 992 NOTE 6 RELATED PART! 9 PAGE 992 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (84) NOTE 7 OIL AND GAS INFORM (85) NOTE 7 OIL AND GAS INFORM (86)! 11 PAGE 994 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (33)!31 2000 1 PAGE 1001 PARKER PARSBalance Sheet (34)Income Statement (35) STATEMENTS OF PARTNERS CA (34)Cash Flows (35)!8 PAGE 1010 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (68)! NOTE 5 OIL AND GAS PRODUC (69)! 9 PAGE 1011 NOTE 6 RELATED PAR! 9 PAGE 1011 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (87) NOTE 7 OIL AND GAS INFORM (88) NOTE 7 OIL AND GAS INFORM (89)!11 PAGE 1013 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (34) SUPPLEMENTAL INFORMATION (30)Balance Sheet (35)Income Statement (36) STATEMENTS OF PARTNERS CA (35)Cash Flows (36)!8 PAGE 1029 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (70)! NOTE 5 OIL AND GAS PRODUC (71)! 9 PAGE 1030 NOTE 6 RELATED PAR! 9 PAGE 1030 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (90) NOTE 7 OIL AND GAS INFORM (91) NOTE 7 OIL AND GAS INFORM (92)! 11 PAGE 1032 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (35) SUPPLEMENTAL INFORMATION (31)Balance Sheet (36)Income Statement (37) STATEMENTS OF PARTNERS CA (36)Cash Flows (37)!8 PAGE 1048 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (72)! NOTE 5 OIL AND GAS PRODUC (73)! 9 PAGE 1049 NOTE 6 RELATED PAR! 9 PAGE 1049 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (93) NOTE 7 OIL AND GAS INFORM (94) NOTE 7 OIL AND GAS INFORM (95)! 11 PAGE 1051 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (36)!31 2000 1 PAGE 1058 PARKER PARSPARKER PARSLEY 90A LP ITEM 6 SELECTED FINANCIAL (18)INDEX TO FINANCIAL STATE (15)Balance Sheet (37)Income Statement (38) STATEMENTS OF PARTNERS CA (37)Cash Flows (38)!15 PAGE 1074 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (74)! NOTE 5 OIL AND GAS PRODUC (75)! NOTE 6 RELATED PARTY TRAN (10)! NOTE 6 RELATED PARTY TRAN (11) NOTE 7 OIL AND GAS INFORM (96) NOTE 7 OIL AND GAS INFORM (97)! 18 PAGE 1077 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (18)Beneficial Ownership (18)PARKER PARSLEY 90A LP (1)INDEX TO EXHIBITS (16)SELECTED FINANCIAL DATA (37) SUPPLEMENTAL INFORMATION (32)PARKER PARSLEY 90B CONV LP ITEM 6 SELECTED FINANCIAL (19)INDEX TO FINANCIAL STATE (16)Balance Sheet (38)Income Statement (39) STATEMENTS OF PARTNERS CA (38)Cash Flows (39)!16 PAGE 1105 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (76)! NOTE 5 OIL AND GAS PRODUC (77)! NOTE 6 RELATED PARTY TRAN (12)! NOTE 6 RELATED PARTY TRAN (13) NOTE 7 OIL AND GAS INFORM (98) NOTE 7 OIL AND GAS INFORM (99) NOTE 7 OIL AND GAS INFOR (100)! 19 PAGE 1108 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (19)Beneficial Ownership (19) PARKER PARSLEY 90B CONV LP (1)INDEX TO EXHIBITS (17)SELECTED FINANCIAL DATA (38)!31 2000 1 PAGE 1119 PARKER PARSPARKER PARSLEY 90B LP ITEM 6 SELECTED FINANCIAL (20)INDEX TO FINANCIAL STATE (17)Balance Sheet (39)Income Statement (40) STATEMENTS OF PARTNERS CA (39)Cash Flows (40)!16 PAGE 1136 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (78)! NOTE 5 OIL AND GAS PRODUC (79)! NOTE 6 RELATED PARTY TRAN (14)! NOTE 6 RELATED PARTY TRAN (15) NOTE 7 OIL AND GAS INFOR (101) NOTE 7 OIL AND GAS INFOR (102) NOTE 7 OIL AND GAS INFOR (103)! 19 PAGE 1139 NOTE 8 MAJOR CUS!ITEM 10 DIRECTORS AND EXEC (20)Beneficial Ownership (20)PARKER PARSLEY 90B LP (1)INDEX TO EXHIBITS (18)SELECTED FINANCIAL DATA (39) SUPPLEMENTAL INFORMATION (33)PARKER PARSLEY 90C CONV LP ITEM 6 SELECTED FINANCIAL (21)INDEX TO FINANCIAL STATE (18)Balance Sheet (40)Income Statement (41) STATEMENTS OF PARTNERS CA (40)Cash Flows (41)!15 PAGE 1166 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (80)! NOTE 5 OIL AND GAS PRODUC (81)! NOTE 6 RELATED PARTY TRAN (16)! NOTE 6 RELATED PARTY TRAN (17) NOTE 7 OIL AND GAS INFOR (104) NOTE 7 OIL AND GAS INFOR (105) NOTE 7 OIL AND GAS INFOR (106)! 18 PAGE 1169 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (21)Beneficial Ownership (21) PARKER PARSLEY 90C CONV LP (1)INDEX TO EXHIBITS (19)SELECTED FINANCIAL DATA (40)!31 2000 1 PAGE 1180 PARKER PARSPARKER PARSLEY 90C LP ITEM 6 SELECTED FINANCIAL (22)INDEX TO FINANCIAL STATE (19)Balance Sheet (41)Income Statement (42) STATEMENTS OF PARTNERS CA (41)Cash Flows (42)!15 PAGE 1196 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (82)! NOTE 5 OIL AND GAS PRODUC (83)! NOTE 6 RELATED PARTY TRAN (18)! NOTE 6 RELATED PARTY TRAN (19) NOTE 7 OIL AND GAS INFOR (107) NOTE 7 OIL AND GAS INFOR (108) NOTE 7 OIL AND GAS INFOR (109)! 18 PAGE 1199 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (22)Beneficial Ownership (22)PARKER PARSLEY 90C LP (1)INDEX TO EXHIBITS (20)SELECTED FINANCIAL DATA (41) SUPPLEMENTAL INFORMATION (34)Balance Sheet (42)Income Statement (43) STATEMENTS OF PARTNERS CA (42)Cash Flows (43)!8 PAGE 1219 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (84)! NOTE 5 OIL AND GAS PRODUC (85)! 9 PAGE 1220 NOTE 6 RELATED PAR! 9 PAGE 1220 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (110) NOTE 7 OIL AND GAS INFOR (111) NOTE 7 OIL AND GAS INFOR (112)! 11 PAGE 1222 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (42) SUPPLEMENTAL INFORMATION (35)Balance Sheet (43)Income Statement (44) STATEMENTS OF PARTNERS CA (43)Cash Flows (44)!8 PAGE 1238 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (86)! NOTE 5 OIL AND GAS PRODUC (87)! 9 PAGE 1239 NOTE 6 RELATED PAR! 9 PAGE 1239 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (113) NOTE 7 OIL AND GAS INFOR (114) NOTE 7 OIL AND GAS INFOR (115)! 11 PAGE 1241 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (43)!31 2000 1 PAGE 1248 PARKER PARSPARKER PARSLEY 91A LP ITEM 6 SELECTED FINANCIAL (23)INDEX TO FINANCIAL STATE (20)Balance Sheet (44)Income Statement (45) STATEMENTS OF PARTNERS CA (44)Cash Flows (45)!15 PAGE 1264 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (88)! NOTE 5 OIL AND GAS PRODUC (89)! NOTE 6 RELATED PARTY TRAN (20)! NOTE 6 RELATED PARTY TRAN (21) NOTE 7 OIL AND GAS INFOR (116) NOTE 7 OIL AND GAS INFOR (117) NOTE 7 OIL AND GAS INFOR (118)! 18 PAGE 1267 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (23)Beneficial Ownership (23)PARKER PARSLEY 91A LP (1)INDEX TO EXHIBITS (21)SELECTED FINANCIAL DATA (44)!31 2000 1 PAGE 1278 PARKER PARSPARKER PARSLEY 91B LP ITEM 6 SELECTED FINANCIAL (24)INDEX TO FINANCIAL STATE (21)Balance Sheet (45)Income Statement (46) STATEMENTS OF PARTNERS CA (45)Cash Flows (46)!15 PAGE 1294 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (90)! NOTE 5 OIL AND GAS PRODUC (91)! NOTE 6 RELATED PARTY TRAN (22)! NOTE 6 RELATED PARTY TRAN (23) NOTE 7 OIL AND GAS INFOR (119) NOTE 7 OIL AND GAS INFOR (120) NOTE 7 OIL AND GAS INFOR (121)! 18 PAGE 1297 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (24)Beneficial Ownership (24)PARKER PARSLEY 91B LP (1)INDEX TO EXHIBITS (22)SELECTED FINANCIAL DATA (45)POWER OF ATTORNEYPOWER OF ATTORNEY (1)POWER OF ATTORNEY (2)POWER OF ATTORNEY (3)POWER OF ATTORNEY (4)POWER OF ATTORNEY (5)POWER OF ATTORNEY (6)POWER OF ATTORNEY (7)!2001 THE BOARD OF DIRECTORS REC!2001 THE BOARD OF DIRECTORS (1)!2001 THE BOARD OF DIRECTORS (2)PAGE 2U } :} <}  $    $PIONEER NATURAL RESOURCES CO S-4 04/17/2001FAIRNESS OPINION   MERGER VALUE  TENDER OFFER   (PER $1,000  (PER $1,000  DISCOUNT TO  PARTNERSHIP  INVESTMENT)  INVESTMENT)  MERGER VALUE $Parker & Parsley 82-II, Ltd.(\X@+@(86.0)%%Parker & Parsley 82-III, Ltd.q= ף^@@:@fffffS&Parker & Parsley 83-A, Ltd.(a)= ףpUa@40.00 to 70.00(49.5) to (71.2)&Parker & Parsley 83-B, Ltd.(a)Qb@50.00 to 55.00(63.4) to (66.8)#Parker & Parsley 84-A, Ltd.8h@~ ~ #Parker & Parsley 86-A, Ltd.p= e@~  S#Parker & Parsley 86-B, Ltd.)\Hk@~ fffffG&Parker & Parsley 86-C, Ltd.(a)QPd@65.00 to 67.50(58.5) to (60.0)&Parker & Parsley 87-A, Ltd.(a){Grg@90.00 to 105.00(44.0) to (52.0)&Parker & Parsley 87-B, Ltd.(a)h@60.00 to 65.00(83.4) to (84.7)#Parker & Parsley 88-A, L.P.{Gm@~ BP#Parker & Parsley 88-B, L.P.Hz[s@~ 33333T4,Parker & Parsley Private Investment 89, L.P.ףp= ?p@Pd@@@&Parker & Parsley 90-B, L.P.(a){G*p@102.50 to 160.00(38.2) to (60.4)&Parker & Parsley 90-C, L.P.(a)= ףpm@30.00 to 40.00(83.2) to (87.4)80Parker & Parsley 90 Spraberry Private Dev., L.P.fffff"q@Pd@YDD lsg[qeYMV2M-G !"# $!____________________________1")Created by Morningstar Document Research.0#(http://documentresearch.morningstar.com/ <=PF0*8X> @##""!! l    dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/?? SECURITIES AND EXC!CALCULATION OF REGISTRATION FEETO BE HELD ON 2001TABLE OF CONTENTSPAGE 7 LIST OF APPENDICES!LIMITED PARTNER INVESTMENT REPA!LIMITED PARTNER INVESTMENT (1) 5 PAGE 15 NYMEX FUTURES PRICES!EXAMPLE CALCULATION OF MERGER VIncome StatementIncome Statement (1)AT DECEMBER 31 2000!15 PAGE 25 COMPARATIVE PER SHAR!25 PAGE 35 REASONS FOR THE MERGFAIRNESS OPINION!LEGAL OPINION FOR LIMITED PARTN!LEGAL OPINION FOR LIMITED P (1)!NONMANAGING GENERAL PARTNERS OF!49 PAGE 59 PAYMENT OF EXPENSES !58 PAGE 68 COMPARATIVE PER SHAR!60 PAGE 70 OWNERSHIP OF PARTNER PIONEER PIONEER USATHE DRILLING PARTNERSHIPSTHE DRILLING PARTNERSHIPS (1)THE INCOME PARTNERSHIPS INTERESTSINTERESTS (1)INTERESTS (2)INTERESTS (3)INTERESTS (4)INTERESTS (5)!WHERE YOU CAN FIND MORE INFORMAAS OF DECEMBER 31 2000YEAR ENDED DECEMBER 31 2000!QUANTITIES OF OIL AND GAS RESER!STANDARDIZED MEASURE OF DISCOUN CASH FLOWSAS OF MARCH 31 2001AS OF MARCH 31 2001 (1)AS OF MARCH 31 2001 (2)AS OF MARCH 31 2001 (3)AS OF MARCH 31 2001 (4)AS OF MARCH 31 2001 (5)!FROM INCEPTION THROUGH MARCH 31!ANNUAL REPURCHASE PRICES AND AGOF EACH PARTNERSHIP!FOR THE THREE MONTHS ENDED MARCAS OF DECEMBER 31 2000 (1)AS OF MARCH 31 2001 (6)!THE YEARS ENDED DECEMBER 31 200AS OF DECEMBER 31 2000 (2)DECEMBER 31 2000 AND 1999EFFECTIVE DECEMBER 31 2000 EFFECTIVE DECEMBER 31 2000 (1) RECITALS RECITALS (1) SUPPLEMENTAL INFORMATION TABLEBalance SheetIncome Statement (2) STATEMENTS OF PARTNERS CAPITALCash Flows (1)NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCING A! NOTE 5 OIL AND GAS PRODUCI (1)! NOTE 6 RELATED PARTY TRANSACTI! NOTE 6 RELATED PARTY TRANS (1)! NOTE 7 OIL AND GAS INFORMATION! NOTE 7 OIL AND GAS INFORMA (1)! NOTE 7 OIL AND GAS INFORMA (2)!11 PAGE 163 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA SUPPLEMENTAL INFORMATION T (1)Balance Sheet (1)Income Statement (3) STATEMENTS OF PARTNERS CAP (1)Cash Flows (2)NOTE 4 INCOME TAXES (1)! NOTE 5 OIL AND GAS PRODUCI (2)! NOTE 5 OIL AND GAS PRODUCI (3)! 9 PAGE 180 NOTE 6 RELATED PAR! 9 PAGE 180 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORMA (3)! NOTE 7 OIL AND GAS INFORMA (4)! NOTE 7 OIL AND GAS INFORMA (5)!11 PAGE 182 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (1) SUPPLEMENTAL INFORMATION T (2) ITEM 6 SELECTED FINANCIAL DATAINDEX TO FINANCIAL STATEMENTSBalance Sheet (2)Income Statement (4) STATEMENTS OF PARTNERS CAP (2)Cash Flows (3)!15 PAGE 205 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCI (4)! NOTE 5 OIL AND GAS PRODUCI (5)! NOTE 6 RELATED PARTY TRANS (2)! NOTE 6 RELATED PARTY TRANS (3)! NOTE 7 OIL AND GAS INFORMA (6)! NOTE 7 OIL AND GAS INFORMA (7)! NOTE 7 OIL AND GAS INFORMA (8)! NOTE 7 OIL AND GAS INFORMA (9)! NOTE 7 OIL AND GAS INFORM (10)! 18 PAGE 208 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECUTIVEBeneficial OwnershipPARKER PARSLEY 82I LTDINDEX TO EXHIBITSSELECTED FINANCIAL DATA (2) SUPPLEMENTAL INFORMATION T (3) ITEM 6 SELECTED FINANCIAL (1)INDEX TO FINANCIAL STATEM (1)Balance Sheet (3)Income Statement (5) STATEMENTS OF PARTNERS CAP (3)Cash Flows (4)NOTE 4 INCOME TAXES (2)! NOTE 5 OIL AND GAS PRODUCI (6)! NOTE 5 OIL AND GAS PRODUCI (7)! 16 PAGE 236 NOTE 6 RELATED PAR! 16 PAGE 236 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (11)! NOTE 7 OIL AND GAS INFORM (12)! NOTE 7 OIL AND GAS INFORM (13)!18 PAGE 238 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (1)Beneficial Ownership (1)PARKER PARSLEY 82II LTDINDEX TO EXHIBITS (1)SELECTED FINANCIAL DATA (3) SUPPLEMENTAL INFORMATION T (4)Balance Sheet (4)Income Statement (6) STATEMENTS OF PARTNERS CAP (4)Cash Flows (5)NOTE 4 INCOME TAXES (3)! NOTE 5 OIL AND GAS PRODUCI (8)! NOTE 5 OIL AND GAS PRODUCI (9)! 9 PAGE 259 NOTE 6 RELATED PART! 9 PAGE 259 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (14)! NOTE 7 OIL AND GAS INFORM (15)! NOTE 7 OIL AND GAS INFORM (16)!11 PAGE 261 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (4) SUPPLEMENTAL INFORMATION T (5)PARKER PARSLEY 83A LTD ITEM 6 SELECTED FINANCIAL (2)INDEX TO FINANCIAL STATEM (2)Balance Sheet (5)Income Statement (7) STATEMENTS OF PARTNERS CAP (5)Cash Flows (6)NOTE 4 INCOME TAXES (4)! NOTE 5 OIL AND GAS PRODUC (10)! NOTE 5 OIL AND GAS PRODUC (11)! 16 PAGE 285 NOTE 6 RELATED PAR! 16 PAGE 285 NOTE 6 RELATED (1)!NOTE 7 OIL AND GAS INFORMATION  NOTE 7 OIL AND GAS INFORMA (1) NOTE 7 OIL AND GAS INFORMA (2)! 18 PAGE 287 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECU (2)Beneficial Ownership (2)PARKER PARSLEY 83A LTD (1)INDEX TO EXHIBITS (2)SELECTED FINANCIAL DATA (5) SUPPLEMENTAL INFORMATION T (6)PARKER PARSLEY 83B LTD ITEM 6 SELECTED FINANCIAL (3)INDEX TO FINANCIAL STATEM (3)Balance Sheet (6)Income Statement (8) STATEMENTS OF PARTNERS CAP (6)Cash Flows (7)NOTE 4 INCOME TAXES (5)! NOTE 5 OIL AND GAS PRODUC (12)! NOTE 5 OIL AND GAS PRODUC (13)! 16 PAGE 315 NOTE 6 RELATED PAR! 16 PAGE 315 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (3) NOTE 7 OIL AND GAS INFORMA (4) NOTE 7 OIL AND GAS INFORMA (5)!18 PAGE 317 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (3)Beneficial Ownership (3)PARKER PARSLEY 83B LTD (1)INDEX TO EXHIBITS (3)SELECTED FINANCIAL DATA (6) SUPPLEMENTAL INFORMATION T (7)PARKER PARSLEY 84A LTD ITEM 6 SELECTED FINANCIAL (4)INDEX TO FINANCIAL STATEM (4)Balance Sheet (7)Income Statement (9) STATEMENTS OF PARTNERS CAP (7)Cash Flows (8)!15 PAGE 344 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (14)! NOTE 5 OIL AND GAS PRODUC (15)! 16 PAGE 345 NOTE 6 RELATED PAR! 16 PAGE 345 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (6) NOTE 7 OIL AND GAS INFORMA (7) NOTE 7 OIL AND GAS INFORMA (8)!18 PAGE 347 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (4)Beneficial Ownership (4)PARKER PARSLEY 84A LTD (1)INDEX TO EXHIBITS (4)SELECTED FINANCIAL DATA (7) SUPPLEMENTAL INFORMATION T (8)PARKER PARSLEY 85A LTD ITEM 6 SELECTED FINANCIAL (5)INDEX TO FINANCIAL STATEM (5)Balance Sheet (8)Income Statement (10) STATEMENTS OF PARTNERS CAP (8)Cash Flows (9)NOTE 4 INCOME TAXES (6)! NOTE 5 OIL AND GAS PRODUC (16)! NOTE 5 OIL AND GAS PRODUC (17)! 16 PAGE 375 NOTE 6 RELATED PAR! 16 PAGE 375 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (9) NOTE 7 OIL AND GAS INFORM (10) NOTE 7 OIL AND GAS INFORM (11)!18 PAGE 377 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (5)Beneficial Ownership (5)PARKER PARSLEY 85A LTD (1)INDEX TO EXHIBITS (5)SELECTED FINANCIAL DATA (8) SUPPLEMENTAL INFORMATION T (9)PARKER PARSLEY 85B LTD ITEM 6 SELECTED FINANCIAL (6)!7 PAGE 396 ITEM 8 FINANCIAL STABalance Sheet (9) STATEMENTS OF PARTNERS CAP (9)Cash Flows (10)!15 PAGE 404 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (18)! NOTE 5 OIL AND GAS PRODUC (19)! 16 PAGE 405 NOTE 6 RELATED PAR! 16 PAGE 405 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (12) NOTE 7 OIL AND GAS INFORM (13) NOTE 7 OIL AND GAS INFORM (14)!18 PAGE 407 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (6)Beneficial Ownership (6)PARKER PARSLEY 85B LTD (1)INDEX TO EXHIBITS (6)SELECTED FINANCIAL DATA (9) SUPPLEMENTAL INFORMATION (10)Balance Sheet (10)Income Statement (11) STATEMENTS OF PARTNERS CA (10)Cash Flows (11)NOTE 4 INCOME TAXES (7)! NOTE 5 OIL AND GAS PRODUC (20)! NOTE 5 OIL AND GAS PRODUC (21)! 9 PAGE 428 NOTE 6 RELATED PART! 9 PAGE 428 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (15) NOTE 7 OIL AND GAS INFORM (16) NOTE 7 OIL AND GAS INFORM (17)! 11 PAGE 430 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (10) SUPPLEMENTAL INFORMATION (11)Balance Sheet (11)Income Statement (12) STATEMENTS OF PARTNERS CA (11)Cash Flows (12) 8 PAGE 446 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (22)! NOTE 5 OIL AND GAS PRODUC (23)! 9 PAGE 447 NOTE 6 RELATED PART! 9 PAGE 447 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (18) NOTE 7 OIL AND GAS INFORM (19) NOTE 7 OIL AND GAS INFORM (20)! 11 PAGE 449 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (11) SUPPLEMENTAL INFORMATION (12)PARKER PARSLEY 86A LTD ITEM 6 SELECTED FINANCIAL (7)INDEX TO FINANCIAL STATEM (6)Balance Sheet (12)Income Statement (13) STATEMENTS OF PARTNERS CA (12)Cash Flows (13)NOTE 4 INCOME TAXES (8)! NOTE 5 OIL AND GAS PRODUC (24)! NOTE 5 OIL AND GAS PRODUC (25)! 16 PAGE 473 NOTE 6 RELATED PAR! 16 PAGE 473 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (21) NOTE 7 OIL AND GAS INFORM (22) NOTE 7 OIL AND GAS INFORM (23)!18 PAGE 475 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (7)Beneficial Ownership (7)PARKER PARSLEY 86A LTD (1)INDEX TO EXHIBITS (7)SELECTED FINANCIAL DATA (12) SUPPLEMENTAL INFORMATION (13)PARKER PARSLEY 86B LTD ITEM 6 SELECTED FINANCIAL (8)INDEX TO FINANCIAL STATEM (7)Balance Sheet (13)Income Statement (14) STATEMENTS OF PARTNERS CA (13)Cash Flows (14)!16 PAGE 503 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (26)! NOTE 5 OIL AND GAS PRODUC (27)! NOTE 6 RELATED PARTY TRANS (4)! NOTE 6 RELATED PARTY TRANS (5) NOTE 7 OIL AND GAS INFORM (24) NOTE 7 OIL AND GAS INFORM (25) NOTE 7 OIL AND GAS INFORM (26)!19 PAGE 506 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (8)Beneficial Ownership (8)PARKER PARSLEY 86B LTD (1)INDEX TO EXHIBITS (8)SELECTED FINANCIAL DATA (13) SUPPLEMENTAL INFORMATION (14) ITEM 6 SELECTED FINANCIAL (9)!7 PAGE 525 ITEM 8 FINANCIAL STABalance Sheet (14)Income Statement (15) STATEMENTS OF PARTNERS CA (14)Cash Flows (15)NOTE 4 INCOME TAXES (9)! NOTE 5 OIL AND GAS PRODUC (28)! NOTE 5 OIL AND GAS PRODUC (29)! 16 PAGE 534 NOTE 6 RELATED PAR! 16 PAGE 534 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (27) NOTE 7 OIL AND GAS INFORM (28) NOTE 7 OIL AND GAS INFORM (29)!18 PAGE 536 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (9)Beneficial Ownership (9)PARKER PARSLEY 86C LTDSELECTED FINANCIAL DATA (14) SUPPLEMENTAL INFORMATION (15)Balance Sheet (15)Income Statement (16) STATEMENTS OF PARTNERS CA (15)Cash Flows (16) 8 PAGE 556 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (30)! NOTE 5 OIL AND GAS PRODUC (31)! NOTE 6 RELATED PARTY TRANS (6)! NOTE 6 RELATED PARTY TRANS (7) NOTE 7 OIL AND GAS INFORM (30) NOTE 7 OIL AND GAS INFORM (31) NOTE 7 OIL AND GAS INFORM (32)! 11 PAGE 559 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (15) SUPPLEMENTAL INFORMATION (16)Balance Sheet (16)Income Statement (17) STATEMENTS OF PARTNERS CA (16)Cash Flows (17)NOTE 4 INCOME TAXES (10)! NOTE 5 OIL AND GAS PRODUC (32)! NOTE 5 OIL AND GAS PRODUC (33)! 9 PAGE 576 NOTE 6 RELATED PART! 9 PAGE 576 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (33) NOTE 7 OIL AND GAS INFORM (34) NOTE 7 OIL AND GAS INFORM (35)!11 PAGE 578 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (16) SUPPLEMENTAL INFORMATION (17) ITEM 6 SELECTED FINANCIAL (10)!8 PAGE 594 ITEM 8 FINANCIAL STABalance Sheet (17)Income Statement (18) STATEMENTS OF PARTNERS CA (17)Cash Flows (18)NOTE 4 INCOME TAXES (11)! NOTE 5 OIL AND GAS PRODUC (34)! NOTE 5 OIL AND GAS PRODUC (35)! 17 PAGE 603 NOTE 6 RELATED PAR! 17 PAGE 603 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (36) NOTE 7 OIL AND GAS INFORM (37) NOTE 7 OIL AND GAS INFORM (38)! 19 PAGE 605 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (10)Beneficial Ownership (10)PARKER PARSLEY 87A LTDSELECTED FINANCIAL DATA (17) SUPPLEMENTAL INFORMATION (18)Balance Sheet (18)Income Statement (19) STATEMENTS OF PARTNERS CA (18)Cash Flows (19) 8 PAGE 625 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (36)! NOTE 5 OIL AND GAS PRODUC (37)! 9 PAGE 626 NOTE 6 RELATED PART! 9 PAGE 626 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (39) NOTE 7 OIL AND GAS INFORM (40) NOTE 7 OIL AND GAS INFORM (41)! 11 PAGE 628 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (18) SUPPLEMENTAL INFORMATION (19) ITEM 6 SELECTED FINANCIAL (11)INDEX TO FINANCIAL STATEM (8)Balance Sheet (19)Income Statement (20) STATEMENTS OF PARTNERS CA (19)Cash Flows (20)NOTE 4 INCOME TAXES (12)! NOTE 5 OIL AND GAS PRODUC (38)! NOTE 5 OIL AND GAS PRODUC (39)! 17 PAGE 653 NOTE 6 RELATED PAR! 17 PAGE 653 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (42) NOTE 7 OIL AND GAS INFORM (43) NOTE 7 OIL AND GAS INFORM (44)! 19 PAGE 655 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (11)Beneficial Ownership (11)PARKER PARSLEY 87B LTDINDEX TO EXHIBITS (9)SELECTED FINANCIAL DATA (19) SUPPLEMENTAL INFORMATION (20) ITEM 6 SELECTED FINANCIAL (12)INDEX TO FINANCIAL STATEM (9)Balance Sheet (20)Income Statement (21) STATEMENTS OF PARTNERS CA (20)Cash Flows (21)!16 PAGE 683 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (40)! NOTE 5 OIL AND GAS PRODUC (41)! NOTE 6 RELATED PARTY TRANS (8)! NOTE 6 RELATED PARTY TRANS (9) NOTE 7 OIL AND GAS INFORM (45) NOTE 7 OIL AND GAS INFORM (46) NOTE 7 OIL AND GAS INFORM (47)!19 PAGE 686 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (12)Beneficial Ownership (12)PROPERTIES 87A LTDINDEX TO EXHIBITS (10)SELECTED FINANCIAL DATA (20) SUPPLEMENTAL INFORMATION (21) ITEM 6 SELECTED FINANCIAL (13)INDEX TO FINANCIAL STATE (10)Balance Sheet (21)Income Statement (22) STATEMENTS OF PARTNERS CA (21)Cash Flows (22)!16 PAGE 714 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (42)! NOTE 5 OIL AND GAS PRODUC (43)! 17 PAGE 715 NOTE 6 RELATED PAR! 17 PAGE 715 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (48) NOTE 7 OIL AND GAS INFORM (49) NOTE 7 OIL AND GAS INFORM (50)! 19 PAGE 717 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (13)Beneficial Ownership (13)PROPERTIES 87B LTDINDEX TO EXHIBITS (11)SELECTED FINANCIAL DATA (21) SUPPLEMENTAL INFORMATION (22)Balance Sheet (22)Income Statement (23) STATEMENTS OF PARTNERS CA (22)Cash Flows (23) 8 PAGE 737 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (44)! NOTE 5 OIL AND GAS PRODUC (45)! 9 PAGE 738 NOTE 6 RELATED PART! 9 PAGE 738 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (51) NOTE 7 OIL AND GAS INFORM (52) NOTE 7 OIL AND GAS INFORM (53)! 11 PAGE 740 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (22) SUPPLEMENTAL INFORMATION (23)Balance Sheet (23)Income Statement (24) STATEMENTS OF PARTNERS CA (23)Cash Flows (24) 8 PAGE 756 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (46)! NOTE 5 OIL AND GAS PRODUC (47)! 9 PAGE 757 NOTE 6 RELATED PART! 9 PAGE 757 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (54) NOTE 7 OIL AND GAS INFORM (55) NOTE 7 OIL AND GAS INFORM (56)! 11 PAGE 759 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (23)!31 2000 1 PAGE 766 PARKER PARSLPARKER PARSLEY 88A LP ITEM 6 SELECTED FINANCIAL (14)INDEX TO FINANCIAL STATE (11)Balance Sheet (24)Income Statement (25) STATEMENTS OF PARTNERS CA (24)Cash Flows (25)NOTE 4 INCOME TAXES (13)! NOTE 5 OIL AND GAS PRODUC (48)! NOTE 5 OIL AND GAS PRODUC (49)! 16 PAGE 783 NOTE 6 RELATED PAR! 16 PAGE 783 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (57) NOTE 7 OIL AND GAS INFORM (58) NOTE 7 OIL AND GAS INFORM (59)! 18 PAGE 785 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (14)Beneficial Ownership (14)PARKER PARSLEY 88A LP (1)INDEX TO EXHIBITS (12)SELECTED FINANCIAL DATA (24) SUPPLEMENTAL INFORMATION (24)Balance Sheet (25)Income Statement (26) STATEMENTS OF PARTNERS CA (25)Cash Flows (26) 8 PAGE 805 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (50)! NOTE 5 OIL AND GAS PRODUC (51)! 9 PAGE 806 NOTE 6 RELATED PART! 9 PAGE 806 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (60) NOTE 7 OIL AND GAS INFORM (61) NOTE 7 OIL AND GAS INFORM (62)! 11 PAGE 808 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (25)!31 2000 1 PAGE 815 PARKER PARSLPARKER PARSLEY 88B LP ITEM 6 SELECTED FINANCIAL (15)INDEX TO FINANCIAL STATE (12)Balance Sheet (26)Income Statement (27) STATEMENTS OF PARTNERS CA (26)Cash Flows (27)!16 PAGE 832 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (52)! NOTE 5 OIL AND GAS PRODUC (53)! 17 PAGE 833 NOTE 6 RELATED PAR! 17 PAGE 833 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (63) NOTE 7 OIL AND GAS INFORM (64) NOTE 7 OIL AND GAS INFORM (65)! 19 PAGE 835 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (15)Beneficial Ownership (15)PARKER PARSLEY 88B LP (1)INDEX TO EXHIBITS (13)SELECTED FINANCIAL DATA (26) SUPPLEMENTAL INFORMATION (25)Balance Sheet (27)Income Statement (28) STATEMENTS OF PARTNERS CA (27)Cash Flows (28) 8 PAGE 855 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (54)! NOTE 5 OIL AND GAS PRODUC (55)! 9 PAGE 856 NOTE 6 RELATED PART! 9 PAGE 856 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (66) NOTE 7 OIL AND GAS INFORM (67) NOTE 7 OIL AND GAS INFORM (68)! 11 PAGE 858 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (27)!31 2000 1 PAGE 865 PARKER PARSLBalance Sheet (28)Income Statement (29) STATEMENTS OF PARTNERS CA (28)Cash Flows (29) 8 PAGE 874 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (56)! NOTE 5 OIL AND GAS PRODUC (57)! 9 PAGE 875 NOTE 6 RELATED PART! 9 PAGE 875 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (69) NOTE 7 OIL AND GAS INFORM (70) NOTE 7 OIL AND GAS INFORM (71)! 11 PAGE 877 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (28) SUPPLEMENTAL INFORMATION (26)!PARKER PARSLEY PRODUCING PROPER ITEM 6 SELECTED FINANCIAL (16)INDEX TO FINANCIAL STATE (13)Balance Sheet (29)Income Statement (30) STATEMENTS OF PARTNERS CA (29)Cash Flows (30)NOTE 4 INCOME TAXES (14)! NOTE 5 OIL AND GAS PRODUC (58)! NOTE 5 OIL AND GAS PRODUC (59)! 16 PAGE 901 NOTE 6 RELATED PAR! 16 PAGE 901 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (72) NOTE 7 OIL AND GAS INFORM (73)!18 PAGE 903 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (16)Beneficial Ownership (16)PROPERTIES 88A LPINDEX TO EXHIBITS (14)SELECTED FINANCIAL DATA (29) SUPPLEMENTAL INFORMATION (27)Balance Sheet (30)Income Statement (31) STATEMENTS OF PARTNERS CA (30)Cash Flows (31)NOTE 4 INCOME TAXES (15)! NOTE 5 OIL AND GAS PRODUC (60)! NOTE 5 OIL AND GAS PRODUC (61)! 9 PAGE 924 NOTE 6 RELATED PART! 9 PAGE 924 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (74) NOTE 7 OIL AND GAS INFORM (75) NOTE 7 OIL AND GAS INFORM (76)! 11 PAGE 926 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (30) SUPPLEMENTAL INFORMATION (28)Balance Sheet (31)Income Statement (32) STATEMENTS OF PARTNERS CA (31)Cash Flows (32)NOTE 4 INCOME TAXES (16)! NOTE 5 OIL AND GAS PRODUC (62)! NOTE 5 OIL AND GAS PRODUC (63)! 9 PAGE 943 NOTE 6 RELATED PART! 9 PAGE 943 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (77) NOTE 7 OIL AND GAS INFORM (78) NOTE 7 OIL AND GAS INFORM (79)!11 PAGE 945 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (31)!31 2000 1 PAGE 952 PARKER PARSLPARKER PARSLEY 89A LP ITEM 6 SELECTED FINANCIAL (17)INDEX TO FINANCIAL STATE (14)Balance Sheet (32)Income Statement (33) STATEMENTS OF PARTNERS CA (32)Cash Flows (33)NOTE 4 INCOME TAXES (17)! NOTE 5 OIL AND GAS PRODUC (64)! NOTE 5 OIL AND GAS PRODUC (65)! 16 PAGE 969 NOTE 6 RELATED PAR! 16 PAGE 969 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (80) NOTE 7 OIL AND GAS INFORM (81) NOTE 7 OIL AND GAS INFORM (82) NOTE 7 OIL AND GAS INFORM (83)! 18 PAGE 971 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (17)Beneficial Ownership (17)PARKER PARSLEY 89A LP (1)INDEX TO EXHIBITS (15)SELECTED FINANCIAL DATA (32) SUPPLEMENTAL INFORMATION (29)Balance Sheet (33)Income Statement (34) STATEMENTS OF PARTNERS CA (33)Cash Flows (34) 8 PAGE 991 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (66)! NOTE 5 OIL AND GAS PRODUC (67)! 9 PAGE 992 NOTE 6 RELATED PART! 9 PAGE 992 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (84) NOTE 7 OIL AND GAS INFORM (85) NOTE 7 OIL AND GAS INFORM (86)! 11 PAGE 994 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (33)!31 2000 1 PAGE 1001 PARKER PARSBalance Sheet (34)Income Statement (35) STATEMENTS OF PARTNERS CA (34)Cash Flows (35)!8 PAGE 1010 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (68)! NOTE 5 OIL AND GAS PRODUC (69)! 9 PAGE 1011 NOTE 6 RELATED PAR! 9 PAGE 1011 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (87) NOTE 7 OIL AND GAS INFORM (88) NOTE 7 OIL AND GAS INFORM (89)!11 PAGE 1013 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (34) SUPPLEMENTAL INFORMATION (30)Balance Sheet (35)Income Statement (36) STATEMENTS OF PARTNERS CA (35)Cash Flows (36)!8 PAGE 1029 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (70)! NOTE 5 OIL AND GAS PRODUC (71)! 9 PAGE 1030 NOTE 6 RELATED PAR! 9 PAGE 1030 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (90) NOTE 7 OIL AND GAS INFORM (91) NOTE 7 OIL AND GAS INFORM (92)! 11 PAGE 1032 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (35) SUPPLEMENTAL INFORMATION (31)Balance Sheet (36)Income Statement (37) STATEMENTS OF PARTNERS CA (36)Cash Flows (37)!8 PAGE 1048 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (72)! NOTE 5 OIL AND GAS PRODUC (73)! 9 PAGE 1049 NOTE 6 RELATED PAR! 9 PAGE 1049 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (93) NOTE 7 OIL AND GAS INFORM (94) NOTE 7 OIL AND GAS INFORM (95)! 11 PAGE 1051 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (36)!31 2000 1 PAGE 1058 PARKER PARSPARKER PARSLEY 90A LP ITEM 6 SELECTED FINANCIAL (18)INDEX TO FINANCIAL STATE (15)Balance Sheet (37)Income Statement (38) STATEMENTS OF PARTNERS CA (37)Cash Flows (38)!15 PAGE 1074 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (74)! NOTE 5 OIL AND GAS PRODUC (75)! NOTE 6 RELATED PARTY TRAN (10)! NOTE 6 RELATED PARTY TRAN (11) NOTE 7 OIL AND GAS INFORM (96) NOTE 7 OIL AND GAS INFORM (97)! 18 PAGE 1077 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (18)Beneficial Ownership (18)PARKER PARSLEY 90A LP (1)INDEX TO EXHIBITS (16)SELECTED FINANCIAL DATA (37) SUPPLEMENTAL INFORMATION (32)PARKER PARSLEY 90B CONV LP ITEM 6 SELECTED FINANCIAL (19)INDEX TO FINANCIAL STATE (16)Balance Sheet (38)Income Statement (39) STATEMENTS OF PARTNERS CA (38)Cash Flows (39)!16 PAGE 1105 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (76)! NOTE 5 OIL AND GAS PRODUC (77)! NOTE 6 RELATED PARTY TRAN (12)! NOTE 6 RELATED PARTY TRAN (13) NOTE 7 OIL AND GAS INFORM (98) NOTE 7 OIL AND GAS INFORM (99) NOTE 7 OIL AND GAS INFOR (100)! 19 PAGE 1108 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (19)Beneficial Ownership (19) PARKER PARSLEY 90B CONV LP (1)INDEX TO EXHIBITS (17)SELECTED FINANCIAL DATA (38)!31 2000 1 PAGE 1119 PARKER PARSPARKER PARSLEY 90B LP ITEM 6 SELECTED FINANCIAL (20)INDEX TO FINANCIAL STATE (17)Balance Sheet (39)Income Statement (40) STATEMENTS OF PARTNERS CA (39)Cash Flows (40)!16 PAGE 1136 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (78)! NOTE 5 OIL AND GAS PRODUC (79)! NOTE 6 RELATED PARTY TRAN (14)! NOTE 6 RELATED PARTY TRAN (15) NOTE 7 OIL AND GAS INFOR (101) NOTE 7 OIL AND GAS INFOR (102) NOTE 7 OIL AND GAS INFOR (103)! 19 PAGE 1139 NOTE 8 MAJOR CUS!ITEM 10 DIRECTORS AND EXEC (20)Beneficial Ownership (20)PARKER PARSLEY 90B LP (1)INDEX TO EXHIBITS (18)SELECTED FINANCIAL DATA (39) SUPPLEMENTAL INFORMATION (33)PARKER PARSLEY 90C CONV LP ITEM 6 SELECTED FINANCIAL (21)INDEX TO FINANCIAL STATE (18)Balance Sheet (40)Income Statement (41) STATEMENTS OF PARTNERS CA (40)Cash Flows (41)!15 PAGE 1166 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (80)! NOTE 5 OIL AND GAS PRODUC (81)! NOTE 6 RELATED PARTY TRAN (16)! NOTE 6 RELATED PARTY TRAN (17) NOTE 7 OIL AND GAS INFOR (104) NOTE 7 OIL AND GAS INFOR (105) NOTE 7 OIL AND GAS INFOR (106)! 18 PAGE 1169 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (21)Beneficial Ownership (21) PARKER PARSLEY 90C CONV LP (1)INDEX TO EXHIBITS (19)SELECTED FINANCIAL DATA (40)!31 2000 1 PAGE 1180 PARKER PARSPARKER PARSLEY 90C LP ITEM 6 SELECTED FINANCIAL (22)INDEX TO FINANCIAL STATE (19)Balance Sheet (41)Income Statement (42) STATEMENTS OF PARTNERS CA (41)Cash Flows (42)!15 PAGE 1196 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (82)! NOTE 5 OIL AND GAS PRODUC (83)! NOTE 6 RELATED PARTY TRAN (18)! NOTE 6 RELATED PARTY TRAN (19) NOTE 7 OIL AND GAS INFOR (107) NOTE 7 OIL AND GAS INFOR (108) NOTE 7 OIL AND GAS INFOR (109)! 18 PAGE 1199 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (22)Beneficial Ownership (22)PARKER PARSLEY 90C LP (1)INDEX TO EXHIBITS (20)SELECTED FINANCIAL DATA (41) SUPPLEMENTAL INFORMATION (34)Balance Sheet (42)Income Statement (43) STATEMENTS OF PARTNERS CA (42)Cash Flows (43)!8 PAGE 1219 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (84)! NOTE 5 OIL AND GAS PRODUC (85)! 9 PAGE 1220 NOTE 6 RELATED PAR! 9 PAGE 1220 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (110) NOTE 7 OIL AND GAS INFOR (111) NOTE 7 OIL AND GAS INFOR (112)! 11 PAGE 1222 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (42) SUPPLEMENTAL INFORMATION (35)Balance Sheet (43)Income Statement (44) STATEMENTS OF PARTNERS CA (43)Cash Flows (44)!8 PAGE 1238 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (86)! NOTE 5 OIL AND GAS PRODUC (87)! 9 PAGE 1239 NOTE 6 RELATED PAR! 9 PAGE 1239 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (113) NOTE 7 OIL AND GAS INFOR (114) NOTE 7 OIL AND GAS INFOR (115)! 11 PAGE 1241 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (43)!31 2000 1 PAGE 1248 PARKER PARSPARKER PARSLEY 91A LP ITEM 6 SELECTED FINANCIAL (23)INDEX TO FINANCIAL STATE (20)Balance Sheet (44)Income Statement (45) STATEMENTS OF PARTNERS CA (44)Cash Flows (45)!15 PAGE 1264 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (88)! NOTE 5 OIL AND GAS PRODUC (89)! NOTE 6 RELATED PARTY TRAN (20)! NOTE 6 RELATED PARTY TRAN (21) NOTE 7 OIL AND GAS INFOR (116) NOTE 7 OIL AND GAS INFOR (117) NOTE 7 OIL AND GAS INFOR (118)! 18 PAGE 1267 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (23)Beneficial Ownership (23)PARKER PARSLEY 91A LP (1)INDEX TO EXHIBITS (21)SELECTED FINANCIAL DATA (44)!31 2000 1 PAGE 1278 PARKER PARSPARKER PARSLEY 91B LP ITEM 6 SELECTED FINANCIAL (24)INDEX TO FINANCIAL STATE (21)Balance Sheet (45)Income Statement (46) STATEMENTS OF PARTNERS CA (45)Cash Flows (46)!15 PAGE 1294 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (90)! NOTE 5 OIL AND GAS PRODUC (91)! NOTE 6 RELATED PARTY TRAN (22)! NOTE 6 RELATED PARTY TRAN (23) NOTE 7 OIL AND GAS INFOR (119) NOTE 7 OIL AND GAS INFOR (120) NOTE 7 OIL AND GAS INFOR (121)! 18 PAGE 1297 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (24)Beneficial Ownership (24)PARKER PARSLEY 91B LP (1)INDEX TO EXHIBITS (22)SELECTED FINANCIAL DATA (45)POWER OF ATTORNEYPOWER OF ATTORNEY (1)POWER OF ATTORNEY (2)POWER OF ATTORNEY (3)POWER OF ATTORNEY (4)POWER OF ATTORNEY (5)POWER OF ATTORNEY (6)POWER OF ATTORNEY (7)!2001 THE BOARD OF DIRECTORS REC!2001 THE BOARD OF DIRECTORS (1)!2001 THE BOARD OF DIRECTORS (2)PAGE 2U } y#} <} $} I     $PIONEER NATURAL RESOURCES CO S-4 04/17/2001FAIRNESS OPINION  & PER $1,000 ORIGINAL INVESTMENT    MERGER VALUE REPURCHASE OFFER PREMIUM #Parker & Parsley 82-I, Ltd.HzwT@ףp= ?a@68.5%$Parker & Parsley 82-II, Ltd.(\X@ףp= `@~ %Parker & Parsley 82-III, Ltd.q= ף^@{Gb@9@#Parker & Parsley 83-A, Ltd.= ףpUa@= ףph@fffffD@#Parker & Parsley 83-B, Ltd.Qb@Dj@C@#Parker & Parsley 84-A, Ltd.8h@Gzp@fffffB@$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/8Gsg[:$j^R*=PF0*8X> @ l  &Z  dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/?? SECURITIES AND EXC!CALCULATION OF REGISTRATION FEETO BE HELD ON 2001TABLE OF CONTENTSPAGE 7 LIST OF APPENDICES!LIMITED PARTNER INVESTMENT REPA!LIMITED PARTNER INVESTMENT (1) 5 PAGE 15 NYMEX FUTURES PRICES!EXAMPLE CALCULATION OF MERGER VIncome StatementIncome Statement (1)AT DECEMBER 31 2000!15 PAGE 25 COMPARATIVE PER SHAR!25 PAGE 35 REASONS FOR THE MERGFAIRNESS OPINIONFAIRNESS OPINION (1)!LEGAL OPINION FOR LIMITED P (1)!NONMANAGING GENERAL PARTNERS OF!49 PAGE 59 PAYMENT OF EXPENSES !58 PAGE 68 COMPARATIVE PER SHAR!60 PAGE 70 OWNERSHIP OF PARTNER PIONEER PIONEER USATHE DRILLING PARTNERSHIPSTHE DRILLING PARTNERSHIPS (1)THE INCOME PARTNERSHIPS INTERESTSINTERESTS (1)INTERESTS (2)INTERESTS (3)INTERESTS (4)INTERESTS (5)!WHERE YOU CAN FIND MORE INFORMAAS OF DECEMBER 31 2000YEAR ENDED DECEMBER 31 2000!QUANTITIES OF OIL AND GAS RESER!STANDARDIZED MEASURE OF DISCOUN CASH FLOWSAS OF MARCH 31 2001AS OF MARCH 31 2001 (1)AS OF MARCH 31 2001 (2)AS OF MARCH 31 2001 (3)AS OF MARCH 31 2001 (4)AS OF MARCH 31 2001 (5)!FROM INCEPTION THROUGH MARCH 31!ANNUAL REPURCHASE PRICES AND AGOF EACH PARTNERSHIP!FOR THE THREE MONTHS ENDED MARCAS OF DECEMBER 31 2000 (1)AS OF MARCH 31 2001 (6)!THE YEARS ENDED DECEMBER 31 200AS OF DECEMBER 31 2000 (2)DECEMBER 31 2000 AND 1999EFFECTIVE DECEMBER 31 2000 EFFECTIVE DECEMBER 31 2000 (1) RECITALS RECITALS (1) SUPPLEMENTAL INFORMATION TABLEBalance SheetIncome Statement (2) STATEMENTS OF PARTNERS CAPITALCash Flows (1)NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCING A! NOTE 5 OIL AND GAS PRODUCI (1)! NOTE 6 RELATED PARTY TRANSACTI! NOTE 6 RELATED PARTY TRANS (1)! NOTE 7 OIL AND GAS INFORMATION! NOTE 7 OIL AND GAS INFORMA (1)! NOTE 7 OIL AND GAS INFORMA (2)!11 PAGE 163 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA SUPPLEMENTAL INFORMATION T (1)Balance Sheet (1)Income Statement (3) STATEMENTS OF PARTNERS CAP (1)Cash Flows (2)NOTE 4 INCOME TAXES (1)! NOTE 5 OIL AND GAS PRODUCI (2)! NOTE 5 OIL AND GAS PRODUCI (3)! 9 PAGE 180 NOTE 6 RELATED PAR! 9 PAGE 180 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORMA (3)! NOTE 7 OIL AND GAS INFORMA (4)! NOTE 7 OIL AND GAS INFORMA (5)!11 PAGE 182 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (1) SUPPLEMENTAL INFORMATION T (2) ITEM 6 SELECTED FINANCIAL DATAINDEX TO FINANCIAL STATEMENTSBalance Sheet (2)Income Statement (4) STATEMENTS OF PARTNERS CAP (2)Cash Flows (3)!15 PAGE 205 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCI (4)! NOTE 5 OIL AND GAS PRODUCI (5)! NOTE 6 RELATED PARTY TRANS (2)! NOTE 6 RELATED PARTY TRANS (3)! NOTE 7 OIL AND GAS INFORMA (6)! NOTE 7 OIL AND GAS INFORMA (7)! NOTE 7 OIL AND GAS INFORMA (8)! NOTE 7 OIL AND GAS INFORMA (9)! NOTE 7 OIL AND GAS INFORM (10)! 18 PAGE 208 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECUTIVEBeneficial OwnershipPARKER PARSLEY 82I LTDINDEX TO EXHIBITSSELECTED FINANCIAL DATA (2) SUPPLEMENTAL INFORMATION T (3) ITEM 6 SELECTED FINANCIAL (1)INDEX TO FINANCIAL STATEM (1)Balance Sheet (3)Income Statement (5) STATEMENTS OF PARTNERS CAP (3)Cash Flows (4)NOTE 4 INCOME TAXES (2)! NOTE 5 OIL AND GAS PRODUCI (6)! NOTE 5 OIL AND GAS PRODUCI (7)! 16 PAGE 236 NOTE 6 RELATED PAR! 16 PAGE 236 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (11)! NOTE 7 OIL AND GAS INFORM (12)! NOTE 7 OIL AND GAS INFORM (13)!18 PAGE 238 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (1)Beneficial Ownership (1)PARKER PARSLEY 82II LTDINDEX TO EXHIBITS (1)SELECTED FINANCIAL DATA (3) SUPPLEMENTAL INFORMATION T (4)Balance Sheet (4)Income Statement (6) STATEMENTS OF PARTNERS CAP (4)Cash Flows (5)NOTE 4 INCOME TAXES (3)! NOTE 5 OIL AND GAS PRODUCI (8)! NOTE 5 OIL AND GAS PRODUCI (9)! 9 PAGE 259 NOTE 6 RELATED PART! 9 PAGE 259 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (14)! NOTE 7 OIL AND GAS INFORM (15)! NOTE 7 OIL AND GAS INFORM (16)!11 PAGE 261 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (4) SUPPLEMENTAL INFORMATION T (5)PARKER PARSLEY 83A LTD ITEM 6 SELECTED FINANCIAL (2)INDEX TO FINANCIAL STATEM (2)Balance Sheet (5)Income Statement (7) STATEMENTS OF PARTNERS CAP (5)Cash Flows (6)NOTE 4 INCOME TAXES (4)! NOTE 5 OIL AND GAS PRODUC (10)! NOTE 5 OIL AND GAS PRODUC (11)! 16 PAGE 285 NOTE 6 RELATED PAR! 16 PAGE 285 NOTE 6 RELATED (1)!NOTE 7 OIL AND GAS INFORMATION  NOTE 7 OIL AND GAS INFORMA (1) NOTE 7 OIL AND GAS INFORMA (2)! 18 PAGE 287 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECU (2)Beneficial Ownership (2)PARKER PARSLEY 83A LTD (1)INDEX TO EXHIBITS (2)SELECTED FINANCIAL DATA (5) SUPPLEMENTAL INFORMATION T (6)PARKER PARSLEY 83B LTD ITEM 6 SELECTED FINANCIAL (3)INDEX TO FINANCIAL STATEM (3)Balance Sheet (6)Income Statement (8) STATEMENTS OF PARTNERS CAP (6)Cash Flows (7)NOTE 4 INCOME TAXES (5)! NOTE 5 OIL AND GAS PRODUC (12)! NOTE 5 OIL AND GAS PRODUC (13)! 16 PAGE 315 NOTE 6 RELATED PAR! 16 PAGE 315 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (3) NOTE 7 OIL AND GAS INFORMA (4) NOTE 7 OIL AND GAS INFORMA (5)!18 PAGE 317 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (3)Beneficial Ownership (3)PARKER PARSLEY 83B LTD (1)INDEX TO EXHIBITS (3)SELECTED FINANCIAL DATA (6) SUPPLEMENTAL INFORMATION T (7)PARKER PARSLEY 84A LTD ITEM 6 SELECTED FINANCIAL (4)INDEX TO FINANCIAL STATEM (4)Balance Sheet (7)Income Statement (9) STATEMENTS OF PARTNERS CAP (7)Cash Flows (8)!15 PAGE 344 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (14)! NOTE 5 OIL AND GAS PRODUC (15)! 16 PAGE 345 NOTE 6 RELATED PAR! 16 PAGE 345 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (6) NOTE 7 OIL AND GAS INFORMA (7) NOTE 7 OIL AND GAS INFORMA (8)!18 PAGE 347 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (4)Beneficial Ownership (4)PARKER PARSLEY 84A LTD (1)INDEX TO EXHIBITS (4)SELECTED FINANCIAL DATA (7) SUPPLEMENTAL INFORMATION T (8)PARKER PARSLEY 85A LTD ITEM 6 SELECTED FINANCIAL (5)INDEX TO FINANCIAL STATEM (5)Balance Sheet (8)Income Statement (10) STATEMENTS OF PARTNERS CAP (8)Cash Flows (9)NOTE 4 INCOME TAXES (6)! NOTE 5 OIL AND GAS PRODUC (16)! NOTE 5 OIL AND GAS PRODUC (17)! 16 PAGE 375 NOTE 6 RELATED PAR! 16 PAGE 375 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (9) NOTE 7 OIL AND GAS INFORM (10) NOTE 7 OIL AND GAS INFORM (11)!18 PAGE 377 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (5)Beneficial Ownership (5)PARKER PARSLEY 85A LTD (1)INDEX TO EXHIBITS (5)SELECTED FINANCIAL DATA (8) SUPPLEMENTAL INFORMATION T (9)PARKER PARSLEY 85B LTD ITEM 6 SELECTED FINANCIAL (6)!7 PAGE 396 ITEM 8 FINANCIAL STABalance Sheet (9) STATEMENTS OF PARTNERS CAP (9)Cash Flows (10)!15 PAGE 404 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (18)! NOTE 5 OIL AND GAS PRODUC (19)! 16 PAGE 405 NOTE 6 RELATED PAR! 16 PAGE 405 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (12) NOTE 7 OIL AND GAS INFORM (13) NOTE 7 OIL AND GAS INFORM (14)!18 PAGE 407 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (6)Beneficial Ownership (6)PARKER PARSLEY 85B LTD (1)INDEX TO EXHIBITS (6)SELECTED FINANCIAL DATA (9) SUPPLEMENTAL INFORMATION (10)Balance Sheet (10)Income Statement (11) STATEMENTS OF PARTNERS CA (10)Cash Flows (11)NOTE 4 INCOME TAXES (7)! NOTE 5 OIL AND GAS PRODUC (20)! NOTE 5 OIL AND GAS PRODUC (21)! 9 PAGE 428 NOTE 6 RELATED PART! 9 PAGE 428 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (15) NOTE 7 OIL AND GAS INFORM (16) NOTE 7 OIL AND GAS INFORM (17)! 11 PAGE 430 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (10) SUPPLEMENTAL INFORMATION (11)Balance Sheet (11)Income Statement (12) STATEMENTS OF PARTNERS CA (11)Cash Flows (12) 8 PAGE 446 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (22)! NOTE 5 OIL AND GAS PRODUC (23)! 9 PAGE 447 NOTE 6 RELATED PART! 9 PAGE 447 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (18) NOTE 7 OIL AND GAS INFORM (19) NOTE 7 OIL AND GAS INFORM (20)! 11 PAGE 449 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (11) SUPPLEMENTAL INFORMATION (12)PARKER PARSLEY 86A LTD ITEM 6 SELECTED FINANCIAL (7)INDEX TO FINANCIAL STATEM (6)Balance Sheet (12)Income Statement (13) STATEMENTS OF PARTNERS CA (12)Cash Flows (13)NOTE 4 INCOME TAXES (8)! NOTE 5 OIL AND GAS PRODUC (24)! NOTE 5 OIL AND GAS PRODUC (25)! 16 PAGE 473 NOTE 6 RELATED PAR! 16 PAGE 473 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (21) NOTE 7 OIL AND GAS INFORM (22) NOTE 7 OIL AND GAS INFORM (23)!18 PAGE 475 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (7)Beneficial Ownership (7)PARKER PARSLEY 86A LTD (1)INDEX TO EXHIBITS (7)SELECTED FINANCIAL DATA (12) SUPPLEMENTAL INFORMATION (13)PARKER PARSLEY 86B LTD ITEM 6 SELECTED FINANCIAL (8)INDEX TO FINANCIAL STATEM (7)Balance Sheet (13)Income Statement (14) STATEMENTS OF PARTNERS CA (13)Cash Flows (14)!16 PAGE 503 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (26)! NOTE 5 OIL AND GAS PRODUC (27)! NOTE 6 RELATED PARTY TRANS (4)! NOTE 6 RELATED PARTY TRANS (5) NOTE 7 OIL AND GAS INFORM (24) NOTE 7 OIL AND GAS INFORM (25) NOTE 7 OIL AND GAS INFORM (26)!19 PAGE 506 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (8)Beneficial Ownership (8)PARKER PARSLEY 86B LTD (1)INDEX TO EXHIBITS (8)SELECTED FINANCIAL DATA (13) SUPPLEMENTAL INFORMATION (14) ITEM 6 SELECTED FINANCIAL (9)!7 PAGE 525 ITEM 8 FINANCIAL STABalance Sheet (14)Income Statement (15) STATEMENTS OF PARTNERS CA (14)Cash Flows (15)NOTE 4 INCOME TAXES (9)! NOTE 5 OIL AND GAS PRODUC (28)! NOTE 5 OIL AND GAS PRODUC (29)! 16 PAGE 534 NOTE 6 RELATED PAR! 16 PAGE 534 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (27) NOTE 7 OIL AND GAS INFORM (28) NOTE 7 OIL AND GAS INFORM (29)!18 PAGE 536 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (9)Beneficial Ownership (9)PARKER PARSLEY 86C LTDSELECTED FINANCIAL DATA (14) SUPPLEMENTAL INFORMATION (15)Balance Sheet (15)Income Statement (16) STATEMENTS OF PARTNERS CA (15)Cash Flows (16) 8 PAGE 556 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (30)! NOTE 5 OIL AND GAS PRODUC (31)! NOTE 6 RELATED PARTY TRANS (6)! NOTE 6 RELATED PARTY TRANS (7) NOTE 7 OIL AND GAS INFORM (30) NOTE 7 OIL AND GAS INFORM (31) NOTE 7 OIL AND GAS INFORM (32)! 11 PAGE 559 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (15) SUPPLEMENTAL INFORMATION (16)Balance Sheet (16)Income Statement (17) STATEMENTS OF PARTNERS CA (16)Cash Flows (17)NOTE 4 INCOME TAXES (10)! NOTE 5 OIL AND GAS PRODUC (32)! NOTE 5 OIL AND GAS PRODUC (33)! 9 PAGE 576 NOTE 6 RELATED PART! 9 PAGE 576 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (33) NOTE 7 OIL AND GAS INFORM (34) NOTE 7 OIL AND GAS INFORM (35)!11 PAGE 578 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (16) SUPPLEMENTAL INFORMATION (17) ITEM 6 SELECTED FINANCIAL (10)!8 PAGE 594 ITEM 8 FINANCIAL STABalance Sheet (17)Income Statement (18) STATEMENTS OF PARTNERS CA (17)Cash Flows (18)NOTE 4 INCOME TAXES (11)! NOTE 5 OIL AND GAS PRODUC (34)! NOTE 5 OIL AND GAS PRODUC (35)! 17 PAGE 603 NOTE 6 RELATED PAR! 17 PAGE 603 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (36) NOTE 7 OIL AND GAS INFORM (37) NOTE 7 OIL AND GAS INFORM (38)! 19 PAGE 605 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (10)Beneficial Ownership (10)PARKER PARSLEY 87A LTDSELECTED FINANCIAL DATA (17) SUPPLEMENTAL INFORMATION (18)Balance Sheet (18)Income Statement (19) STATEMENTS OF PARTNERS CA (18)Cash Flows (19) 8 PAGE 625 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (36)! NOTE 5 OIL AND GAS PRODUC (37)! 9 PAGE 626 NOTE 6 RELATED PART! 9 PAGE 626 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (39) NOTE 7 OIL AND GAS INFORM (40) NOTE 7 OIL AND GAS INFORM (41)! 11 PAGE 628 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (18) SUPPLEMENTAL INFORMATION (19) ITEM 6 SELECTED FINANCIAL (11)INDEX TO FINANCIAL STATEM (8)Balance Sheet (19)Income Statement (20) STATEMENTS OF PARTNERS CA (19)Cash Flows (20)NOTE 4 INCOME TAXES (12)! NOTE 5 OIL AND GAS PRODUC (38)! NOTE 5 OIL AND GAS PRODUC (39)! 17 PAGE 653 NOTE 6 RELATED PAR! 17 PAGE 653 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (42) NOTE 7 OIL AND GAS INFORM (43) NOTE 7 OIL AND GAS INFORM (44)! 19 PAGE 655 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (11)Beneficial Ownership (11)PARKER PARSLEY 87B LTDINDEX TO EXHIBITS (9)SELECTED FINANCIAL DATA (19) SUPPLEMENTAL INFORMATION (20) ITEM 6 SELECTED FINANCIAL (12)INDEX TO FINANCIAL STATEM (9)Balance Sheet (20)Income Statement (21) STATEMENTS OF PARTNERS CA (20)Cash Flows (21)!16 PAGE 683 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (40)! NOTE 5 OIL AND GAS PRODUC (41)! NOTE 6 RELATED PARTY TRANS (8)! NOTE 6 RELATED PARTY TRANS (9) NOTE 7 OIL AND GAS INFORM (45) NOTE 7 OIL AND GAS INFORM (46) NOTE 7 OIL AND GAS INFORM (47)!19 PAGE 686 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (12)Beneficial Ownership (12)PROPERTIES 87A LTDINDEX TO EXHIBITS (10)SELECTED FINANCIAL DATA (20) SUPPLEMENTAL INFORMATION (21) ITEM 6 SELECTED FINANCIAL (13)INDEX TO FINANCIAL STATE (10)Balance Sheet (21)Income Statement (22) STATEMENTS OF PARTNERS CA (21)Cash Flows (22)!16 PAGE 714 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (42)! NOTE 5 OIL AND GAS PRODUC (43)! 17 PAGE 715 NOTE 6 RELATED PAR! 17 PAGE 715 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (48) NOTE 7 OIL AND GAS INFORM (49) NOTE 7 OIL AND GAS INFORM (50)! 19 PAGE 717 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (13)Beneficial Ownership (13)PROPERTIES 87B LTDINDEX TO EXHIBITS (11)SELECTED FINANCIAL DATA (21) SUPPLEMENTAL INFORMATION (22)Balance Sheet (22)Income Statement (23) STATEMENTS OF PARTNERS CA (22)Cash Flows (23) 8 PAGE 737 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (44)! NOTE 5 OIL AND GAS PRODUC (45)! 9 PAGE 738 NOTE 6 RELATED PART! 9 PAGE 738 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (51) NOTE 7 OIL AND GAS INFORM (52) NOTE 7 OIL AND GAS INFORM (53)! 11 PAGE 740 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (22) SUPPLEMENTAL INFORMATION (23)Balance Sheet (23)Income Statement (24) STATEMENTS OF PARTNERS CA (23)Cash Flows (24) 8 PAGE 756 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (46)! NOTE 5 OIL AND GAS PRODUC (47)! 9 PAGE 757 NOTE 6 RELATED PART! 9 PAGE 757 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (54) NOTE 7 OIL AND GAS INFORM (55) NOTE 7 OIL AND GAS INFORM (56)! 11 PAGE 759 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (23)!31 2000 1 PAGE 766 PARKER PARSLPARKER PARSLEY 88A LP ITEM 6 SELECTED FINANCIAL (14)INDEX TO FINANCIAL STATE (11)Balance Sheet (24)Income Statement (25) STATEMENTS OF PARTNERS CA (24)Cash Flows (25)NOTE 4 INCOME TAXES (13)! NOTE 5 OIL AND GAS PRODUC (48)! NOTE 5 OIL AND GAS PRODUC (49)! 16 PAGE 783 NOTE 6 RELATED PAR! 16 PAGE 783 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (57) NOTE 7 OIL AND GAS INFORM (58) NOTE 7 OIL AND GAS INFORM (59)! 18 PAGE 785 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (14)Beneficial Ownership (14)PARKER PARSLEY 88A LP (1)INDEX TO EXHIBITS (12)SELECTED FINANCIAL DATA (24) SUPPLEMENTAL INFORMATION (24)Balance Sheet (25)Income Statement (26) STATEMENTS OF PARTNERS CA (25)Cash Flows (26) 8 PAGE 805 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (50)! NOTE 5 OIL AND GAS PRODUC (51)! 9 PAGE 806 NOTE 6 RELATED PART! 9 PAGE 806 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (60) NOTE 7 OIL AND GAS INFORM (61) NOTE 7 OIL AND GAS INFORM (62)! 11 PAGE 808 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (25)!31 2000 1 PAGE 815 PARKER PARSLPARKER PARSLEY 88B LP ITEM 6 SELECTED FINANCIAL (15)INDEX TO FINANCIAL STATE (12)Balance Sheet (26)Income Statement (27) STATEMENTS OF PARTNERS CA (26)Cash Flows (27)!16 PAGE 832 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (52)! NOTE 5 OIL AND GAS PRODUC (53)! 17 PAGE 833 NOTE 6 RELATED PAR! 17 PAGE 833 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (63) NOTE 7 OIL AND GAS INFORM (64) NOTE 7 OIL AND GAS INFORM (65)! 19 PAGE 835 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (15)Beneficial Ownership (15)PARKER PARSLEY 88B LP (1)INDEX TO EXHIBITS (13)SELECTED FINANCIAL DATA (26) SUPPLEMENTAL INFORMATION (25)Balance Sheet (27)Income Statement (28) STATEMENTS OF PARTNERS CA (27)Cash Flows (28) 8 PAGE 855 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (54)! NOTE 5 OIL AND GAS PRODUC (55)! 9 PAGE 856 NOTE 6 RELATED PART! 9 PAGE 856 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (66) NOTE 7 OIL AND GAS INFORM (67) NOTE 7 OIL AND GAS INFORM (68)! 11 PAGE 858 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (27)!31 2000 1 PAGE 865 PARKER PARSLBalance Sheet (28)Income Statement (29) STATEMENTS OF PARTNERS CA (28)Cash Flows (29) 8 PAGE 874 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (56)! NOTE 5 OIL AND GAS PRODUC (57)! 9 PAGE 875 NOTE 6 RELATED PART! 9 PAGE 875 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (69) NOTE 7 OIL AND GAS INFORM (70) NOTE 7 OIL AND GAS INFORM (71)! 11 PAGE 877 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (28) SUPPLEMENTAL INFORMATION (26)!PARKER PARSLEY PRODUCING PROPER ITEM 6 SELECTED FINANCIAL (16)INDEX TO FINANCIAL STATE (13)Balance Sheet (29)Income Statement (30) STATEMENTS OF PARTNERS CA (29)Cash Flows (30)NOTE 4 INCOME TAXES (14)! NOTE 5 OIL AND GAS PRODUC (58)! NOTE 5 OIL AND GAS PRODUC (59)! 16 PAGE 901 NOTE 6 RELATED PAR! 16 PAGE 901 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (72) NOTE 7 OIL AND GAS INFORM (73)!18 PAGE 903 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (16)Beneficial Ownership (16)PROPERTIES 88A LPINDEX TO EXHIBITS (14)SELECTED FINANCIAL DATA (29) SUPPLEMENTAL INFORMATION (27)Balance Sheet (30)Income Statement (31) STATEMENTS OF PARTNERS CA (30)Cash Flows (31)NOTE 4 INCOME TAXES (15)! NOTE 5 OIL AND GAS PRODUC (60)! NOTE 5 OIL AND GAS PRODUC (61)! 9 PAGE 924 NOTE 6 RELATED PART! 9 PAGE 924 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (74) NOTE 7 OIL AND GAS INFORM (75) NOTE 7 OIL AND GAS INFORM (76)! 11 PAGE 926 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (30) SUPPLEMENTAL INFORMATION (28)Balance Sheet (31)Income Statement (32) STATEMENTS OF PARTNERS CA (31)Cash Flows (32)NOTE 4 INCOME TAXES (16)! NOTE 5 OIL AND GAS PRODUC (62)! NOTE 5 OIL AND GAS PRODUC (63)! 9 PAGE 943 NOTE 6 RELATED PART! 9 PAGE 943 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (77) NOTE 7 OIL AND GAS INFORM (78) NOTE 7 OIL AND GAS INFORM (79)!11 PAGE 945 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (31)!31 2000 1 PAGE 952 PARKER PARSLPARKER PARSLEY 89A LP ITEM 6 SELECTED FINANCIAL (17)INDEX TO FINANCIAL STATE (14)Balance Sheet (32)Income Statement (33) STATEMENTS OF PARTNERS CA (32)Cash Flows (33)NOTE 4 INCOME TAXES (17)! NOTE 5 OIL AND GAS PRODUC (64)! NOTE 5 OIL AND GAS PRODUC (65)! 16 PAGE 969 NOTE 6 RELATED PAR! 16 PAGE 969 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (80) NOTE 7 OIL AND GAS INFORM (81) NOTE 7 OIL AND GAS INFORM (82) NOTE 7 OIL AND GAS INFORM (83)! 18 PAGE 971 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (17)Beneficial Ownership (17)PARKER PARSLEY 89A LP (1)INDEX TO EXHIBITS (15)SELECTED FINANCIAL DATA (32) SUPPLEMENTAL INFORMATION (29)Balance Sheet (33)Income Statement (34) STATEMENTS OF PARTNERS CA (33)Cash Flows (34) 8 PAGE 991 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (66)! NOTE 5 OIL AND GAS PRODUC (67)! 9 PAGE 992 NOTE 6 RELATED PART! 9 PAGE 992 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (84) NOTE 7 OIL AND GAS INFORM (85) NOTE 7 OIL AND GAS INFORM (86)! 11 PAGE 994 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (33)!31 2000 1 PAGE 1001 PARKER PARSBalance Sheet (34)Income Statement (35) STATEMENTS OF PARTNERS CA (34)Cash Flows (35)!8 PAGE 1010 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (68)! NOTE 5 OIL AND GAS PRODUC (69)! 9 PAGE 1011 NOTE 6 RELATED PAR! 9 PAGE 1011 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (87) NOTE 7 OIL AND GAS INFORM (88) NOTE 7 OIL AND GAS INFORM (89)!11 PAGE 1013 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (34) SUPPLEMENTAL INFORMATION (30)Balance Sheet (35)Income Statement (36) STATEMENTS OF PARTNERS CA (35)Cash Flows (36)!8 PAGE 1029 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (70)! NOTE 5 OIL AND GAS PRODUC (71)! 9 PAGE 1030 NOTE 6 RELATED PAR! 9 PAGE 1030 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (90) NOTE 7 OIL AND GAS INFORM (91) NOTE 7 OIL AND GAS INFORM (92)! 11 PAGE 1032 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (35) SUPPLEMENTAL INFORMATION (31)Balance Sheet (36)Income Statement (37) STATEMENTS OF PARTNERS CA (36)Cash Flows (37)!8 PAGE 1048 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (72)! NOTE 5 OIL AND GAS PRODUC (73)! 9 PAGE 1049 NOTE 6 RELATED PAR! 9 PAGE 1049 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (93) NOTE 7 OIL AND GAS INFORM (94) NOTE 7 OIL AND GAS INFORM (95)! 11 PAGE 1051 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (36)!31 2000 1 PAGE 1058 PARKER PARSPARKER PARSLEY 90A LP ITEM 6 SELECTED FINANCIAL (18)INDEX TO FINANCIAL STATE (15)Balance Sheet (37)Income Statement (38) STATEMENTS OF PARTNERS CA (37)Cash Flows (38)!15 PAGE 1074 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (74)! NOTE 5 OIL AND GAS PRODUC (75)! NOTE 6 RELATED PARTY TRAN (10)! NOTE 6 RELATED PARTY TRAN (11) NOTE 7 OIL AND GAS INFORM (96) NOTE 7 OIL AND GAS INFORM (97)! 18 PAGE 1077 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (18)Beneficial Ownership (18)PARKER PARSLEY 90A LP (1)INDEX TO EXHIBITS (16)SELECTED FINANCIAL DATA (37) SUPPLEMENTAL INFORMATION (32)PARKER PARSLEY 90B CONV LP ITEM 6 SELECTED FINANCIAL (19)INDEX TO FINANCIAL STATE (16)Balance Sheet (38)Income Statement (39) STATEMENTS OF PARTNERS CA (38)Cash Flows (39)!16 PAGE 1105 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (76)! NOTE 5 OIL AND GAS PRODUC (77)! NOTE 6 RELATED PARTY TRAN (12)! NOTE 6 RELATED PARTY TRAN (13) NOTE 7 OIL AND GAS INFORM (98) NOTE 7 OIL AND GAS INFORM (99) NOTE 7 OIL AND GAS INFOR (100)! 19 PAGE 1108 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (19)Beneficial Ownership (19) PARKER PARSLEY 90B CONV LP (1)INDEX TO EXHIBITS (17)SELECTED FINANCIAL DATA (38)!31 2000 1 PAGE 1119 PARKER PARSPARKER PARSLEY 90B LP ITEM 6 SELECTED FINANCIAL (20)INDEX TO FINANCIAL STATE (17)Balance Sheet (39)Income Statement (40) STATEMENTS OF PARTNERS CA (39)Cash Flows (40)!16 PAGE 1136 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (78)! NOTE 5 OIL AND GAS PRODUC (79)! NOTE 6 RELATED PARTY TRAN (14)! NOTE 6 RELATED PARTY TRAN (15) NOTE 7 OIL AND GAS INFOR (101) NOTE 7 OIL AND GAS INFOR (102) NOTE 7 OIL AND GAS INFOR (103)! 19 PAGE 1139 NOTE 8 MAJOR CUS!ITEM 10 DIRECTORS AND EXEC (20)Beneficial Ownership (20)PARKER PARSLEY 90B LP (1)INDEX TO EXHIBITS (18)SELECTED FINANCIAL DATA (39) SUPPLEMENTAL INFORMATION (33)PARKER PARSLEY 90C CONV LP ITEM 6 SELECTED FINANCIAL (21)INDEX TO FINANCIAL STATE (18)Balance Sheet (40)Income Statement (41) STATEMENTS OF PARTNERS CA (40)Cash Flows (41)!15 PAGE 1166 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (80)! NOTE 5 OIL AND GAS PRODUC (81)! NOTE 6 RELATED PARTY TRAN (16)! NOTE 6 RELATED PARTY TRAN (17) NOTE 7 OIL AND GAS INFOR (104) NOTE 7 OIL AND GAS INFOR (105) NOTE 7 OIL AND GAS INFOR (106)! 18 PAGE 1169 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (21)Beneficial Ownership (21) PARKER PARSLEY 90C CONV LP (1)INDEX TO EXHIBITS (19)SELECTED FINANCIAL DATA (40)!31 2000 1 PAGE 1180 PARKER PARSPARKER PARSLEY 90C LP ITEM 6 SELECTED FINANCIAL (22)INDEX TO FINANCIAL STATE (19)Balance Sheet (41)Income Statement (42) STATEMENTS OF PARTNERS CA (41)Cash Flows (42)!15 PAGE 1196 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (82)! NOTE 5 OIL AND GAS PRODUC (83)! NOTE 6 RELATED PARTY TRAN (18)! NOTE 6 RELATED PARTY TRAN (19) NOTE 7 OIL AND GAS INFOR (107) NOTE 7 OIL AND GAS INFOR (108) NOTE 7 OIL AND GAS INFOR (109)! 18 PAGE 1199 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (22)Beneficial Ownership (22)PARKER PARSLEY 90C LP (1)INDEX TO EXHIBITS (20)SELECTED FINANCIAL DATA (41) SUPPLEMENTAL INFORMATION (34)Balance Sheet (42)Income Statement (43) STATEMENTS OF PARTNERS CA (42)Cash Flows (43)!8 PAGE 1219 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (84)! NOTE 5 OIL AND GAS PRODUC (85)! 9 PAGE 1220 NOTE 6 RELATED PAR! 9 PAGE 1220 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (110) NOTE 7 OIL AND GAS INFOR (111) NOTE 7 OIL AND GAS INFOR (112)! 11 PAGE 1222 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (42) SUPPLEMENTAL INFORMATION (35)Balance Sheet (43)Income Statement (44) STATEMENTS OF PARTNERS CA (43)Cash Flows (44)!8 PAGE 1238 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (86)! NOTE 5 OIL AND GAS PRODUC (87)! 9 PAGE 1239 NOTE 6 RELATED PAR! 9 PAGE 1239 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (113) NOTE 7 OIL AND GAS INFOR (114) NOTE 7 OIL AND GAS INFOR (115)! 11 PAGE 1241 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (43)!31 2000 1 PAGE 1248 PARKER PARSPARKER PARSLEY 91A LP ITEM 6 SELECTED FINANCIAL (23)INDEX TO FINANCIAL STATE (20)Balance Sheet (44)Income Statement (45) STATEMENTS OF PARTNERS CA (44)Cash Flows (45)!15 PAGE 1264 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (88)! NOTE 5 OIL AND GAS PRODUC (89)! NOTE 6 RELATED PARTY TRAN (20)! NOTE 6 RELATED PARTY TRAN (21) NOTE 7 OIL AND GAS INFOR (116) NOTE 7 OIL AND GAS INFOR (117) NOTE 7 OIL AND GAS INFOR (118)! 18 PAGE 1267 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (23)Beneficial Ownership (23)PARKER PARSLEY 91A LP (1)INDEX TO EXHIBITS (21)SELECTED FINANCIAL DATA (44)!31 2000 1 PAGE 1278 PARKER PARSPARKER PARSLEY 91B LP ITEM 6 SELECTED FINANCIAL (24)INDEX TO FINANCIAL STATE (21)Balance Sheet (45)Income Statement (46) STATEMENTS OF PARTNERS CA (45)Cash Flows (46)!15 PAGE 1294 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (90)! NOTE 5 OIL AND GAS PRODUC (91)! NOTE 6 RELATED PARTY TRAN (22)! NOTE 6 RELATED PARTY TRAN (23) NOTE 7 OIL AND GAS INFOR (119) NOTE 7 OIL AND GAS INFOR (120) NOTE 7 OIL AND GAS INFOR (121)! 18 PAGE 1297 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (24)Beneficial Ownership (24)PARKER PARSLEY 91B LP (1)INDEX TO EXHIBITS (22)SELECTED FINANCIAL DATA (45)POWER OF ATTORNEYPOWER OF ATTORNEY (1)POWER OF ATTORNEY (2)POWER OF ATTORNEY (3)POWER OF ATTORNEY (4)POWER OF ATTORNEY (5)POWER OF ATTORNEY (6)POWER OF ATTORNEY (7)!2001 THE BOARD OF DIRECTORS REC!2001 THE BOARD OF DIRECTORS (1)!2001 THE BOARD OF DIRECTORS (2)PAGE 2U } >}  @     $PIONEER NATURAL RESOURCES CO S-4 04/17/2001*"LEGAL OPINION FOR LIMITED PARTNERS (  Parker & Parsley 81-1, Ltd.= 5Parker & Parsley Selected 85 Private Investment, Ltd.) ! Parker & Parsley 81-II, Ltd.# Parker & Parsley 86-A, Ltd.(  Parker & Parsley 82-I, Ltd.# Parker & Parsley 86-B, Ltd.)! Parker & Parsley 82-II, Ltd.#Parker & Parsley 86-C, Ltd.*" Parker & Parsley 82-III, Ltd.4,Parker & Parsley Private Investment 86, Ltd.( Parker & Parsley 83-A, Ltd.)!Parker & Parsley 87-A Conv., Ltd.( Parker & Parsley 83-B, Ltd.#Parker & Parsley 87-A, Ltd.( Parker & Parsley 84-A, Ltd.#Parker & Parsley 87-B, Ltd.( Parker & Parsley 85-A, Ltd.80Parker & Parsley Producing Properties 87-A, Ltd.( Parker & Parsley 85-B, Ltd.80Parker & Parsley Producing Properties 87-B, Ltd.;3 Parker & Parsley Private Investment 85-A, Ltd.$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/8PymaUI=|)opaUI!=PF0*8X> @ l    dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/?? SECURITIES AND EXC!CALCULATION OF REGISTRATION FEETO BE HELD ON 2001TABLE OF CONTENTSPAGE 7 LIST OF APPENDICES!LIMITED PARTNER INVESTMENT REPA!LIMITED PARTNER INVESTMENT (1) 5 PAGE 15 NYMEX FUTURES PRICES!EXAMPLE CALCULATION OF MERGER VIncome StatementIncome Statement (1)AT DECEMBER 31 2000!15 PAGE 25 COMPARATIVE PER SHAR!25 PAGE 35 REASONS FOR THE MERGFAIRNESS OPINIONFAIRNESS OPINION (1)!LEGAL OPINION FOR LIMITED PARTN!NONMANAGING GENERAL PARTNERS OF!49 PAGE 59 PAYMENT OF EXPENSES !58 PAGE 68 COMPARATIVE PER SHAR!60 PAGE 70 OWNERSHIP OF PARTNER PIONEER PIONEER USATHE DRILLING PARTNERSHIPSTHE DRILLING PARTNERSHIPS (1)THE INCOME PARTNERSHIPS INTERESTSINTERESTS (1)INTERESTS (2)INTERESTS (3)INTERESTS (4)INTERESTS (5)!WHERE YOU CAN FIND MORE INFORMAAS OF DECEMBER 31 2000YEAR ENDED DECEMBER 31 2000!QUANTITIES OF OIL AND GAS RESER!STANDARDIZED MEASURE OF DISCOUN CASH FLOWSAS OF MARCH 31 2001AS OF MARCH 31 2001 (1)AS OF MARCH 31 2001 (2)AS OF MARCH 31 2001 (3)AS OF MARCH 31 2001 (4)AS OF MARCH 31 2001 (5)!FROM INCEPTION THROUGH MARCH 31!ANNUAL REPURCHASE PRICES AND AGOF EACH PARTNERSHIP!FOR THE THREE MONTHS ENDED MARCAS OF DECEMBER 31 2000 (1)AS OF MARCH 31 2001 (6)!THE YEARS ENDED DECEMBER 31 200AS OF DECEMBER 31 2000 (2)DECEMBER 31 2000 AND 1999EFFECTIVE DECEMBER 31 2000 EFFECTIVE DECEMBER 31 2000 (1) RECITALS RECITALS (1) SUPPLEMENTAL INFORMATION TABLEBalance SheetIncome Statement (2) STATEMENTS OF PARTNERS CAPITALCash Flows (1)NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCING A! NOTE 5 OIL AND GAS PRODUCI (1)! NOTE 6 RELATED PARTY TRANSACTI! NOTE 6 RELATED PARTY TRANS (1)! NOTE 7 OIL AND GAS INFORMATION! NOTE 7 OIL AND GAS INFORMA (1)! NOTE 7 OIL AND GAS INFORMA (2)!11 PAGE 163 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA SUPPLEMENTAL INFORMATION T (1)Balance Sheet (1)Income Statement (3) STATEMENTS OF PARTNERS CAP (1)Cash Flows (2)NOTE 4 INCOME TAXES (1)! NOTE 5 OIL AND GAS PRODUCI (2)! NOTE 5 OIL AND GAS PRODUCI (3)! 9 PAGE 180 NOTE 6 RELATED PAR! 9 PAGE 180 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORMA (3)! NOTE 7 OIL AND GAS INFORMA (4)! NOTE 7 OIL AND GAS INFORMA (5)!11 PAGE 182 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (1) SUPPLEMENTAL INFORMATION T (2) ITEM 6 SELECTED FINANCIAL DATAINDEX TO FINANCIAL STATEMENTSBalance Sheet (2)Income Statement (4) STATEMENTS OF PARTNERS CAP (2)Cash Flows (3)!15 PAGE 205 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCI (4)! NOTE 5 OIL AND GAS PRODUCI (5)! NOTE 6 RELATED PARTY TRANS (2)! NOTE 6 RELATED PARTY TRANS (3)! NOTE 7 OIL AND GAS INFORMA (6)! NOTE 7 OIL AND GAS INFORMA (7)! NOTE 7 OIL AND GAS INFORMA (8)! NOTE 7 OIL AND GAS INFORMA (9)! NOTE 7 OIL AND GAS INFORM (10)! 18 PAGE 208 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECUTIVEBeneficial OwnershipPARKER PARSLEY 82I LTDINDEX TO EXHIBITSSELECTED FINANCIAL DATA (2) SUPPLEMENTAL INFORMATION T (3) ITEM 6 SELECTED FINANCIAL (1)INDEX TO FINANCIAL STATEM (1)Balance Sheet (3)Income Statement (5) STATEMENTS OF PARTNERS CAP (3)Cash Flows (4)NOTE 4 INCOME TAXES (2)! NOTE 5 OIL AND GAS PRODUCI (6)! NOTE 5 OIL AND GAS PRODUCI (7)! 16 PAGE 236 NOTE 6 RELATED PAR! 16 PAGE 236 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (11)! NOTE 7 OIL AND GAS INFORM (12)! NOTE 7 OIL AND GAS INFORM (13)!18 PAGE 238 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (1)Beneficial Ownership (1)PARKER PARSLEY 82II LTDINDEX TO EXHIBITS (1)SELECTED FINANCIAL DATA (3) SUPPLEMENTAL INFORMATION T (4)Balance Sheet (4)Income Statement (6) STATEMENTS OF PARTNERS CAP (4)Cash Flows (5)NOTE 4 INCOME TAXES (3)! NOTE 5 OIL AND GAS PRODUCI (8)! NOTE 5 OIL AND GAS PRODUCI (9)! 9 PAGE 259 NOTE 6 RELATED PART! 9 PAGE 259 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (14)! NOTE 7 OIL AND GAS INFORM (15)! NOTE 7 OIL AND GAS INFORM (16)!11 PAGE 261 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (4) SUPPLEMENTAL INFORMATION T (5)PARKER PARSLEY 83A LTD ITEM 6 SELECTED FINANCIAL (2)INDEX TO FINANCIAL STATEM (2)Balance Sheet (5)Income Statement (7) STATEMENTS OF PARTNERS CAP (5)Cash Flows (6)NOTE 4 INCOME TAXES (4)! NOTE 5 OIL AND GAS PRODUC (10)! NOTE 5 OIL AND GAS PRODUC (11)! 16 PAGE 285 NOTE 6 RELATED PAR! 16 PAGE 285 NOTE 6 RELATED (1)!NOTE 7 OIL AND GAS INFORMATION  NOTE 7 OIL AND GAS INFORMA (1) NOTE 7 OIL AND GAS INFORMA (2)! 18 PAGE 287 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECU (2)Beneficial Ownership (2)PARKER PARSLEY 83A LTD (1)INDEX TO EXHIBITS (2)SELECTED FINANCIAL DATA (5) SUPPLEMENTAL INFORMATION T (6)PARKER PARSLEY 83B LTD ITEM 6 SELECTED FINANCIAL (3)INDEX TO FINANCIAL STATEM (3)Balance Sheet (6)Income Statement (8) STATEMENTS OF PARTNERS CAP (6)Cash Flows (7)NOTE 4 INCOME TAXES (5)! NOTE 5 OIL AND GAS PRODUC (12)! NOTE 5 OIL AND GAS PRODUC (13)! 16 PAGE 315 NOTE 6 RELATED PAR! 16 PAGE 315 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (3) NOTE 7 OIL AND GAS INFORMA (4) NOTE 7 OIL AND GAS INFORMA (5)!18 PAGE 317 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (3)Beneficial Ownership (3)PARKER PARSLEY 83B LTD (1)INDEX TO EXHIBITS (3)SELECTED FINANCIAL DATA (6) SUPPLEMENTAL INFORMATION T (7)PARKER PARSLEY 84A LTD ITEM 6 SELECTED FINANCIAL (4)INDEX TO FINANCIAL STATEM (4)Balance Sheet (7)Income Statement (9) STATEMENTS OF PARTNERS CAP (7)Cash Flows (8)!15 PAGE 344 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (14)! NOTE 5 OIL AND GAS PRODUC (15)! 16 PAGE 345 NOTE 6 RELATED PAR! 16 PAGE 345 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (6) NOTE 7 OIL AND GAS INFORMA (7) NOTE 7 OIL AND GAS INFORMA (8)!18 PAGE 347 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (4)Beneficial Ownership (4)PARKER PARSLEY 84A LTD (1)INDEX TO EXHIBITS (4)SELECTED FINANCIAL DATA (7) SUPPLEMENTAL INFORMATION T (8)PARKER PARSLEY 85A LTD ITEM 6 SELECTED FINANCIAL (5)INDEX TO FINANCIAL STATEM (5)Balance Sheet (8)Income Statement (10) STATEMENTS OF PARTNERS CAP (8)Cash Flows (9)NOTE 4 INCOME TAXES (6)! NOTE 5 OIL AND GAS PRODUC (16)! NOTE 5 OIL AND GAS PRODUC (17)! 16 PAGE 375 NOTE 6 RELATED PAR! 16 PAGE 375 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (9) NOTE 7 OIL AND GAS INFORM (10) NOTE 7 OIL AND GAS INFORM (11)!18 PAGE 377 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (5)Beneficial Ownership (5)PARKER PARSLEY 85A LTD (1)INDEX TO EXHIBITS (5)SELECTED FINANCIAL DATA (8) SUPPLEMENTAL INFORMATION T (9)PARKER PARSLEY 85B LTD ITEM 6 SELECTED FINANCIAL (6)!7 PAGE 396 ITEM 8 FINANCIAL STABalance Sheet (9) STATEMENTS OF PARTNERS CAP (9)Cash Flows (10)!15 PAGE 404 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (18)! NOTE 5 OIL AND GAS PRODUC (19)! 16 PAGE 405 NOTE 6 RELATED PAR! 16 PAGE 405 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (12) NOTE 7 OIL AND GAS INFORM (13) NOTE 7 OIL AND GAS INFORM (14)!18 PAGE 407 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (6)Beneficial Ownership (6)PARKER PARSLEY 85B LTD (1)INDEX TO EXHIBITS (6)SELECTED FINANCIAL DATA (9) SUPPLEMENTAL INFORMATION (10)Balance Sheet (10)Income Statement (11) STATEMENTS OF PARTNERS CA (10)Cash Flows (11)NOTE 4 INCOME TAXES (7)! NOTE 5 OIL AND GAS PRODUC (20)! NOTE 5 OIL AND GAS PRODUC (21)! 9 PAGE 428 NOTE 6 RELATED PART! 9 PAGE 428 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (15) NOTE 7 OIL AND GAS INFORM (16) NOTE 7 OIL AND GAS INFORM (17)! 11 PAGE 430 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (10) SUPPLEMENTAL INFORMATION (11)Balance Sheet (11)Income Statement (12) STATEMENTS OF PARTNERS CA (11)Cash Flows (12) 8 PAGE 446 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (22)! NOTE 5 OIL AND GAS PRODUC (23)! 9 PAGE 447 NOTE 6 RELATED PART! 9 PAGE 447 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (18) NOTE 7 OIL AND GAS INFORM (19) NOTE 7 OIL AND GAS INFORM (20)! 11 PAGE 449 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (11) SUPPLEMENTAL INFORMATION (12)PARKER PARSLEY 86A LTD ITEM 6 SELECTED FINANCIAL (7)INDEX TO FINANCIAL STATEM (6)Balance Sheet (12)Income Statement (13) STATEMENTS OF PARTNERS CA (12)Cash Flows (13)NOTE 4 INCOME TAXES (8)! NOTE 5 OIL AND GAS PRODUC (24)! NOTE 5 OIL AND GAS PRODUC (25)! 16 PAGE 473 NOTE 6 RELATED PAR! 16 PAGE 473 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (21) NOTE 7 OIL AND GAS INFORM (22) NOTE 7 OIL AND GAS INFORM (23)!18 PAGE 475 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (7)Beneficial Ownership (7)PARKER PARSLEY 86A LTD (1)INDEX TO EXHIBITS (7)SELECTED FINANCIAL DATA (12) SUPPLEMENTAL INFORMATION (13)PARKER PARSLEY 86B LTD ITEM 6 SELECTED FINANCIAL (8)INDEX TO FINANCIAL STATEM (7)Balance Sheet (13)Income Statement (14) STATEMENTS OF PARTNERS CA (13)Cash Flows (14)!16 PAGE 503 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (26)! NOTE 5 OIL AND GAS PRODUC (27)! NOTE 6 RELATED PARTY TRANS (4)! NOTE 6 RELATED PARTY TRANS (5) NOTE 7 OIL AND GAS INFORM (24) NOTE 7 OIL AND GAS INFORM (25) NOTE 7 OIL AND GAS INFORM (26)!19 PAGE 506 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (8)Beneficial Ownership (8)PARKER PARSLEY 86B LTD (1)INDEX TO EXHIBITS (8)SELECTED FINANCIAL DATA (13) SUPPLEMENTAL INFORMATION (14) ITEM 6 SELECTED FINANCIAL (9)!7 PAGE 525 ITEM 8 FINANCIAL STABalance Sheet (14)Income Statement (15) STATEMENTS OF PARTNERS CA (14)Cash Flows (15)NOTE 4 INCOME TAXES (9)! NOTE 5 OIL AND GAS PRODUC (28)! NOTE 5 OIL AND GAS PRODUC (29)! 16 PAGE 534 NOTE 6 RELATED PAR! 16 PAGE 534 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (27) NOTE 7 OIL AND GAS INFORM (28) NOTE 7 OIL AND GAS INFORM (29)!18 PAGE 536 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (9)Beneficial Ownership (9)PARKER PARSLEY 86C LTDSELECTED FINANCIAL DATA (14) SUPPLEMENTAL INFORMATION (15)Balance Sheet (15)Income Statement (16) STATEMENTS OF PARTNERS CA (15)Cash Flows (16) 8 PAGE 556 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (30)! NOTE 5 OIL AND GAS PRODUC (31)! NOTE 6 RELATED PARTY TRANS (6)! NOTE 6 RELATED PARTY TRANS (7) NOTE 7 OIL AND GAS INFORM (30) NOTE 7 OIL AND GAS INFORM (31) NOTE 7 OIL AND GAS INFORM (32)! 11 PAGE 559 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (15) SUPPLEMENTAL INFORMATION (16)Balance Sheet (16)Income Statement (17) STATEMENTS OF PARTNERS CA (16)Cash Flows (17)NOTE 4 INCOME TAXES (10)! NOTE 5 OIL AND GAS PRODUC (32)! NOTE 5 OIL AND GAS PRODUC (33)! 9 PAGE 576 NOTE 6 RELATED PART! 9 PAGE 576 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (33) NOTE 7 OIL AND GAS INFORM (34) NOTE 7 OIL AND GAS INFORM (35)!11 PAGE 578 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (16) SUPPLEMENTAL INFORMATION (17) ITEM 6 SELECTED FINANCIAL (10)!8 PAGE 594 ITEM 8 FINANCIAL STABalance Sheet (17)Income Statement (18) STATEMENTS OF PARTNERS CA (17)Cash Flows (18)NOTE 4 INCOME TAXES (11)! NOTE 5 OIL AND GAS PRODUC (34)! NOTE 5 OIL AND GAS PRODUC (35)! 17 PAGE 603 NOTE 6 RELATED PAR! 17 PAGE 603 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (36) NOTE 7 OIL AND GAS INFORM (37) NOTE 7 OIL AND GAS INFORM (38)! 19 PAGE 605 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (10)Beneficial Ownership (10)PARKER PARSLEY 87A LTDSELECTED FINANCIAL DATA (17) SUPPLEMENTAL INFORMATION (18)Balance Sheet (18)Income Statement (19) STATEMENTS OF PARTNERS CA (18)Cash Flows (19) 8 PAGE 625 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (36)! NOTE 5 OIL AND GAS PRODUC (37)! 9 PAGE 626 NOTE 6 RELATED PART! 9 PAGE 626 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (39) NOTE 7 OIL AND GAS INFORM (40) NOTE 7 OIL AND GAS INFORM (41)! 11 PAGE 628 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (18) SUPPLEMENTAL INFORMATION (19) ITEM 6 SELECTED FINANCIAL (11)INDEX TO FINANCIAL STATEM (8)Balance Sheet (19)Income Statement (20) STATEMENTS OF PARTNERS CA (19)Cash Flows (20)NOTE 4 INCOME TAXES (12)! NOTE 5 OIL AND GAS PRODUC (38)! NOTE 5 OIL AND GAS PRODUC (39)! 17 PAGE 653 NOTE 6 RELATED PAR! 17 PAGE 653 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (42) NOTE 7 OIL AND GAS INFORM (43) NOTE 7 OIL AND GAS INFORM (44)! 19 PAGE 655 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (11)Beneficial Ownership (11)PARKER PARSLEY 87B LTDINDEX TO EXHIBITS (9)SELECTED FINANCIAL DATA (19) SUPPLEMENTAL INFORMATION (20) ITEM 6 SELECTED FINANCIAL (12)INDEX TO FINANCIAL STATEM (9)Balance Sheet (20)Income Statement (21) STATEMENTS OF PARTNERS CA (20)Cash Flows (21)!16 PAGE 683 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (40)! NOTE 5 OIL AND GAS PRODUC (41)! NOTE 6 RELATED PARTY TRANS (8)! NOTE 6 RELATED PARTY TRANS (9) NOTE 7 OIL AND GAS INFORM (45) NOTE 7 OIL AND GAS INFORM (46) NOTE 7 OIL AND GAS INFORM (47)!19 PAGE 686 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (12)Beneficial Ownership (12)PROPERTIES 87A LTDINDEX TO EXHIBITS (10)SELECTED FINANCIAL DATA (20) SUPPLEMENTAL INFORMATION (21) ITEM 6 SELECTED FINANCIAL (13)INDEX TO FINANCIAL STATE (10)Balance Sheet (21)Income Statement (22) STATEMENTS OF PARTNERS CA (21)Cash Flows (22)!16 PAGE 714 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (42)! NOTE 5 OIL AND GAS PRODUC (43)! 17 PAGE 715 NOTE 6 RELATED PAR! 17 PAGE 715 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (48) NOTE 7 OIL AND GAS INFORM (49) NOTE 7 OIL AND GAS INFORM (50)! 19 PAGE 717 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (13)Beneficial Ownership (13)PROPERTIES 87B LTDINDEX TO EXHIBITS (11)SELECTED FINANCIAL DATA (21) SUPPLEMENTAL INFORMATION (22)Balance Sheet (22)Income Statement (23) STATEMENTS OF PARTNERS CA (22)Cash Flows (23) 8 PAGE 737 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (44)! NOTE 5 OIL AND GAS PRODUC (45)! 9 PAGE 738 NOTE 6 RELATED PART! 9 PAGE 738 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (51) NOTE 7 OIL AND GAS INFORM (52) NOTE 7 OIL AND GAS INFORM (53)! 11 PAGE 740 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (22) SUPPLEMENTAL INFORMATION (23)Balance Sheet (23)Income Statement (24) STATEMENTS OF PARTNERS CA (23)Cash Flows (24) 8 PAGE 756 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (46)! NOTE 5 OIL AND GAS PRODUC (47)! 9 PAGE 757 NOTE 6 RELATED PART! 9 PAGE 757 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (54) NOTE 7 OIL AND GAS INFORM (55) NOTE 7 OIL AND GAS INFORM (56)! 11 PAGE 759 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (23)!31 2000 1 PAGE 766 PARKER PARSLPARKER PARSLEY 88A LP ITEM 6 SELECTED FINANCIAL (14)INDEX TO FINANCIAL STATE (11)Balance Sheet (24)Income Statement (25) STATEMENTS OF PARTNERS CA (24)Cash Flows (25)NOTE 4 INCOME TAXES (13)! NOTE 5 OIL AND GAS PRODUC (48)! NOTE 5 OIL AND GAS PRODUC (49)! 16 PAGE 783 NOTE 6 RELATED PAR! 16 PAGE 783 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (57) NOTE 7 OIL AND GAS INFORM (58) NOTE 7 OIL AND GAS INFORM (59)! 18 PAGE 785 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (14)Beneficial Ownership (14)PARKER PARSLEY 88A LP (1)INDEX TO EXHIBITS (12)SELECTED FINANCIAL DATA (24) SUPPLEMENTAL INFORMATION (24)Balance Sheet (25)Income Statement (26) STATEMENTS OF PARTNERS CA (25)Cash Flows (26) 8 PAGE 805 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (50)! NOTE 5 OIL AND GAS PRODUC (51)! 9 PAGE 806 NOTE 6 RELATED PART! 9 PAGE 806 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (60) NOTE 7 OIL AND GAS INFORM (61) NOTE 7 OIL AND GAS INFORM (62)! 11 PAGE 808 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (25)!31 2000 1 PAGE 815 PARKER PARSLPARKER PARSLEY 88B LP ITEM 6 SELECTED FINANCIAL (15)INDEX TO FINANCIAL STATE (12)Balance Sheet (26)Income Statement (27) STATEMENTS OF PARTNERS CA (26)Cash Flows (27)!16 PAGE 832 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (52)! NOTE 5 OIL AND GAS PRODUC (53)! 17 PAGE 833 NOTE 6 RELATED PAR! 17 PAGE 833 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (63) NOTE 7 OIL AND GAS INFORM (64) NOTE 7 OIL AND GAS INFORM (65)! 19 PAGE 835 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (15)Beneficial Ownership (15)PARKER PARSLEY 88B LP (1)INDEX TO EXHIBITS (13)SELECTED FINANCIAL DATA (26) SUPPLEMENTAL INFORMATION (25)Balance Sheet (27)Income Statement (28) STATEMENTS OF PARTNERS CA (27)Cash Flows (28) 8 PAGE 855 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (54)! NOTE 5 OIL AND GAS PRODUC (55)! 9 PAGE 856 NOTE 6 RELATED PART! 9 PAGE 856 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (66) NOTE 7 OIL AND GAS INFORM (67) NOTE 7 OIL AND GAS INFORM (68)! 11 PAGE 858 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (27)!31 2000 1 PAGE 865 PARKER PARSLBalance Sheet (28)Income Statement (29) STATEMENTS OF PARTNERS CA (28)Cash Flows (29) 8 PAGE 874 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (56)! NOTE 5 OIL AND GAS PRODUC (57)! 9 PAGE 875 NOTE 6 RELATED PART! 9 PAGE 875 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (69) NOTE 7 OIL AND GAS INFORM (70) NOTE 7 OIL AND GAS INFORM (71)! 11 PAGE 877 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (28) SUPPLEMENTAL INFORMATION (26)!PARKER PARSLEY PRODUCING PROPER ITEM 6 SELECTED FINANCIAL (16)INDEX TO FINANCIAL STATE (13)Balance Sheet (29)Income Statement (30) STATEMENTS OF PARTNERS CA (29)Cash Flows (30)NOTE 4 INCOME TAXES (14)! NOTE 5 OIL AND GAS PRODUC (58)! NOTE 5 OIL AND GAS PRODUC (59)! 16 PAGE 901 NOTE 6 RELATED PAR! 16 PAGE 901 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (72) NOTE 7 OIL AND GAS INFORM (73)!18 PAGE 903 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (16)Beneficial Ownership (16)PROPERTIES 88A LPINDEX TO EXHIBITS (14)SELECTED FINANCIAL DATA (29) SUPPLEMENTAL INFORMATION (27)Balance Sheet (30)Income Statement (31) STATEMENTS OF PARTNERS CA (30)Cash Flows (31)NOTE 4 INCOME TAXES (15)! NOTE 5 OIL AND GAS PRODUC (60)! NOTE 5 OIL AND GAS PRODUC (61)! 9 PAGE 924 NOTE 6 RELATED PART! 9 PAGE 924 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (74) NOTE 7 OIL AND GAS INFORM (75) NOTE 7 OIL AND GAS INFORM (76)! 11 PAGE 926 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (30) SUPPLEMENTAL INFORMATION (28)Balance Sheet (31)Income Statement (32) STATEMENTS OF PARTNERS CA (31)Cash Flows (32)NOTE 4 INCOME TAXES (16)! NOTE 5 OIL AND GAS PRODUC (62)! NOTE 5 OIL AND GAS PRODUC (63)! 9 PAGE 943 NOTE 6 RELATED PART! 9 PAGE 943 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (77) NOTE 7 OIL AND GAS INFORM (78) NOTE 7 OIL AND GAS INFORM (79)!11 PAGE 945 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (31)!31 2000 1 PAGE 952 PARKER PARSLPARKER PARSLEY 89A LP ITEM 6 SELECTED FINANCIAL (17)INDEX TO FINANCIAL STATE (14)Balance Sheet (32)Income Statement (33) STATEMENTS OF PARTNERS CA (32)Cash Flows (33)NOTE 4 INCOME TAXES (17)! NOTE 5 OIL AND GAS PRODUC (64)! NOTE 5 OIL AND GAS PRODUC (65)! 16 PAGE 969 NOTE 6 RELATED PAR! 16 PAGE 969 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (80) NOTE 7 OIL AND GAS INFORM (81) NOTE 7 OIL AND GAS INFORM (82) NOTE 7 OIL AND GAS INFORM (83)! 18 PAGE 971 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (17)Beneficial Ownership (17)PARKER PARSLEY 89A LP (1)INDEX TO EXHIBITS (15)SELECTED FINANCIAL DATA (32) SUPPLEMENTAL INFORMATION (29)Balance Sheet (33)Income Statement (34) STATEMENTS OF PARTNERS CA (33)Cash Flows (34) 8 PAGE 991 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (66)! NOTE 5 OIL AND GAS PRODUC (67)! 9 PAGE 992 NOTE 6 RELATED PART! 9 PAGE 992 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (84) NOTE 7 OIL AND GAS INFORM (85) NOTE 7 OIL AND GAS INFORM (86)! 11 PAGE 994 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (33)!31 2000 1 PAGE 1001 PARKER PARSBalance Sheet (34)Income Statement (35) STATEMENTS OF PARTNERS CA (34)Cash Flows (35)!8 PAGE 1010 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (68)! NOTE 5 OIL AND GAS PRODUC (69)! 9 PAGE 1011 NOTE 6 RELATED PAR! 9 PAGE 1011 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (87) NOTE 7 OIL AND GAS INFORM (88) NOTE 7 OIL AND GAS INFORM (89)!11 PAGE 1013 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (34) SUPPLEMENTAL INFORMATION (30)Balance Sheet (35)Income Statement (36) STATEMENTS OF PARTNERS CA (35)Cash Flows (36)!8 PAGE 1029 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (70)! NOTE 5 OIL AND GAS PRODUC (71)! 9 PAGE 1030 NOTE 6 RELATED PAR! 9 PAGE 1030 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (90) NOTE 7 OIL AND GAS INFORM (91) NOTE 7 OIL AND GAS INFORM (92)! 11 PAGE 1032 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (35) SUPPLEMENTAL INFORMATION (31)Balance Sheet (36)Income Statement (37) STATEMENTS OF PARTNERS CA (36)Cash Flows (37)!8 PAGE 1048 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (72)! NOTE 5 OIL AND GAS PRODUC (73)! 9 PAGE 1049 NOTE 6 RELATED PAR! 9 PAGE 1049 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (93) NOTE 7 OIL AND GAS INFORM (94) NOTE 7 OIL AND GAS INFORM (95)! 11 PAGE 1051 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (36)!31 2000 1 PAGE 1058 PARKER PARSPARKER PARSLEY 90A LP ITEM 6 SELECTED FINANCIAL (18)INDEX TO FINANCIAL STATE (15)Balance Sheet (37)Income Statement (38) STATEMENTS OF PARTNERS CA (37)Cash Flows (38)!15 PAGE 1074 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (74)! NOTE 5 OIL AND GAS PRODUC (75)! NOTE 6 RELATED PARTY TRAN (10)! NOTE 6 RELATED PARTY TRAN (11) NOTE 7 OIL AND GAS INFORM (96) NOTE 7 OIL AND GAS INFORM (97)! 18 PAGE 1077 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (18)Beneficial Ownership (18)PARKER PARSLEY 90A LP (1)INDEX TO EXHIBITS (16)SELECTED FINANCIAL DATA (37) SUPPLEMENTAL INFORMATION (32)PARKER PARSLEY 90B CONV LP ITEM 6 SELECTED FINANCIAL (19)INDEX TO FINANCIAL STATE (16)Balance Sheet (38)Income Statement (39) STATEMENTS OF PARTNERS CA (38)Cash Flows (39)!16 PAGE 1105 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (76)! NOTE 5 OIL AND GAS PRODUC (77)! NOTE 6 RELATED PARTY TRAN (12)! NOTE 6 RELATED PARTY TRAN (13) NOTE 7 OIL AND GAS INFORM (98) NOTE 7 OIL AND GAS INFORM (99) NOTE 7 OIL AND GAS INFOR (100)! 19 PAGE 1108 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (19)Beneficial Ownership (19) PARKER PARSLEY 90B CONV LP (1)INDEX TO EXHIBITS (17)SELECTED FINANCIAL DATA (38)!31 2000 1 PAGE 1119 PARKER PARSPARKER PARSLEY 90B LP ITEM 6 SELECTED FINANCIAL (20)INDEX TO FINANCIAL STATE (17)Balance Sheet (39)Income Statement (40) STATEMENTS OF PARTNERS CA (39)Cash Flows (40)!16 PAGE 1136 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (78)! NOTE 5 OIL AND GAS PRODUC (79)! NOTE 6 RELATED PARTY TRAN (14)! NOTE 6 RELATED PARTY TRAN (15) NOTE 7 OIL AND GAS INFOR (101) NOTE 7 OIL AND GAS INFOR (102) NOTE 7 OIL AND GAS INFOR (103)! 19 PAGE 1139 NOTE 8 MAJOR CUS!ITEM 10 DIRECTORS AND EXEC (20)Beneficial Ownership (20)PARKER PARSLEY 90B LP (1)INDEX TO EXHIBITS (18)SELECTED FINANCIAL DATA (39) SUPPLEMENTAL INFORMATION (33)PARKER PARSLEY 90C CONV LP ITEM 6 SELECTED FINANCIAL (21)INDEX TO FINANCIAL STATE (18)Balance Sheet (40)Income Statement (41) STATEMENTS OF PARTNERS CA (40)Cash Flows (41)!15 PAGE 1166 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (80)! NOTE 5 OIL AND GAS PRODUC (81)! NOTE 6 RELATED PARTY TRAN (16)! NOTE 6 RELATED PARTY TRAN (17) NOTE 7 OIL AND GAS INFOR (104) NOTE 7 OIL AND GAS INFOR (105) NOTE 7 OIL AND GAS INFOR (106)! 18 PAGE 1169 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (21)Beneficial Ownership (21) PARKER PARSLEY 90C CONV LP (1)INDEX TO EXHIBITS (19)SELECTED FINANCIAL DATA (40)!31 2000 1 PAGE 1180 PARKER PARSPARKER PARSLEY 90C LP ITEM 6 SELECTED FINANCIAL (22)INDEX TO FINANCIAL STATE (19)Balance Sheet (41)Income Statement (42) STATEMENTS OF PARTNERS CA (41)Cash Flows (42)!15 PAGE 1196 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (82)! NOTE 5 OIL AND GAS PRODUC (83)! NOTE 6 RELATED PARTY TRAN (18)! NOTE 6 RELATED PARTY TRAN (19) NOTE 7 OIL AND GAS INFOR (107) NOTE 7 OIL AND GAS INFOR (108) NOTE 7 OIL AND GAS INFOR (109)! 18 PAGE 1199 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (22)Beneficial Ownership (22)PARKER PARSLEY 90C LP (1)INDEX TO EXHIBITS (20)SELECTED FINANCIAL DATA (41) SUPPLEMENTAL INFORMATION (34)Balance Sheet (42)Income Statement (43) STATEMENTS OF PARTNERS CA (42)Cash Flows (43)!8 PAGE 1219 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (84)! NOTE 5 OIL AND GAS PRODUC (85)! 9 PAGE 1220 NOTE 6 RELATED PAR! 9 PAGE 1220 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (110) NOTE 7 OIL AND GAS INFOR (111) NOTE 7 OIL AND GAS INFOR (112)! 11 PAGE 1222 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (42) SUPPLEMENTAL INFORMATION (35)Balance Sheet (43)Income Statement (44) STATEMENTS OF PARTNERS CA (43)Cash Flows (44)!8 PAGE 1238 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (86)! NOTE 5 OIL AND GAS PRODUC (87)! 9 PAGE 1239 NOTE 6 RELATED PAR! 9 PAGE 1239 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (113) NOTE 7 OIL AND GAS INFOR (114) NOTE 7 OIL AND GAS INFOR (115)! 11 PAGE 1241 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (43)!31 2000 1 PAGE 1248 PARKER PARSPARKER PARSLEY 91A LP ITEM 6 SELECTED FINANCIAL (23)INDEX TO FINANCIAL STATE (20)Balance Sheet (44)Income Statement (45) STATEMENTS OF PARTNERS CA (44)Cash Flows (45)!15 PAGE 1264 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (88)! NOTE 5 OIL AND GAS PRODUC (89)! NOTE 6 RELATED PARTY TRAN (20)! NOTE 6 RELATED PARTY TRAN (21) NOTE 7 OIL AND GAS INFOR (116) NOTE 7 OIL AND GAS INFOR (117) NOTE 7 OIL AND GAS INFOR (118)! 18 PAGE 1267 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (23)Beneficial Ownership (23)PARKER PARSLEY 91A LP (1)INDEX TO EXHIBITS (21)SELECTED FINANCIAL DATA (44)!31 2000 1 PAGE 1278 PARKER PARSPARKER PARSLEY 91B LP ITEM 6 SELECTED FINANCIAL (24)INDEX TO FINANCIAL STATE (21)Balance Sheet (45)Income Statement (46) STATEMENTS OF PARTNERS CA (45)Cash Flows (46)!15 PAGE 1294 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (90)! NOTE 5 OIL AND GAS PRODUC (91)! NOTE 6 RELATED PARTY TRAN (22)! NOTE 6 RELATED PARTY TRAN (23) NOTE 7 OIL AND GAS INFOR (119) NOTE 7 OIL AND GAS INFOR (120) NOTE 7 OIL AND GAS INFOR (121)! 18 PAGE 1297 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (24)Beneficial Ownership (24)PARKER PARSLEY 91B LP (1)INDEX TO EXHIBITS (22)SELECTED FINANCIAL DATA (45)POWER OF ATTORNEYPOWER OF ATTORNEY (1)POWER OF ATTORNEY (2)POWER OF ATTORNEY (3)POWER OF ATTORNEY (4)POWER OF ATTORNEY (5)POWER OF ATTORNEY (6)POWER OF ATTORNEY (7)!2001 THE BOARD OF DIRECTORS REC!2001 THE BOARD OF DIRECTORS (1)!2001 THE BOARD OF DIRECTORS (2)PAGE 2U } y<} :     $PIONEER NATURAL RESOURCES CO S-4 04/17/2001*"LEGAL OPINION FOR LIMITED PARTNERS . & Parker & Parsley 88-A Conv., L.P.) !Parker & Parsley 90-A Conv., L.P.(  Parker & Parsley 88-A, L.P.# Parker & Parsley 90-A, L.P.. & Parker & Parsley 88-B Conv., L.P.) !Parker & Parsley 90-B Conv., L.P.( Parker & Parsley 88-B, L.P.#Parker & Parsley 90-B, L.P..& Parker & Parsley 88-C Conv., L.P.)!Parker & Parsley 90-C Conv., L.P.( Parker & Parsley 88-C, L.P.#Parker & Parsley 90-C, L.P.91 Parker & Parsley Private Investment 88, L.P.4,Parker & Parsley Private Investment 90, L.P..& Parker & Parsley 89-A Conv., L.P.80Parker & Parsley 90 Spraberry Private Dev., L.P.( Parker & Parsley 89-A, L.P.#Parker & Parsley 91-A, L.P..& Parker & Parsley 89-B Conv., L.P.#Parker & Parsley 91-B, L.P.( Parker & Parsley 89-B, L.P.91 Parker & Parsley Private Investment 89, L.P.$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/:ymaUI=,z'Dl/#=PF0*8X> @ l  Z  dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/?? SECURITIES AND EXC!CALCULATION OF REGISTRATION FEETO BE HELD ON 2001TABLE OF CONTENTSPAGE 7 LIST OF APPENDICES!LIMITED PARTNER INVESTMENT REPA!LIMITED PARTNER INVESTMENT (1) 5 PAGE 15 NYMEX FUTURES PRICES!EXAMPLE CALCULATION OF MERGER VIncome StatementIncome Statement (1)AT DECEMBER 31 2000!15 PAGE 25 COMPARATIVE PER SHAR!25 PAGE 35 REASONS FOR THE MERGFAIRNESS OPINIONFAIRNESS OPINION (1)!LEGAL OPINION FOR LIMITED PARTN!LEGAL OPINION FOR LIMITED P (1)!49 PAGE 59 PAYMENT OF EXPENSES !58 PAGE 68 COMPARATIVE PER SHAR!60 PAGE 70 OWNERSHIP OF PARTNER PIONEER PIONEER USATHE DRILLING PARTNERSHIPSTHE DRILLING PARTNERSHIPS (1)THE INCOME PARTNERSHIPS INTERESTSINTERESTS (1)INTERESTS (2)INTERESTS (3)INTERESTS (4)INTERESTS (5)!WHERE YOU CAN FIND MORE INFORMAAS OF DECEMBER 31 2000YEAR ENDED DECEMBER 31 2000!QUANTITIES OF OIL AND GAS RESER!STANDARDIZED MEASURE OF DISCOUN CASH FLOWSAS OF MARCH 31 2001AS OF MARCH 31 2001 (1)AS OF MARCH 31 2001 (2)AS OF MARCH 31 2001 (3)AS OF MARCH 31 2001 (4)AS OF MARCH 31 2001 (5)!FROM INCEPTION THROUGH MARCH 31!ANNUAL REPURCHASE PRICES AND AGOF EACH PARTNERSHIP!FOR THE THREE MONTHS ENDED MARCAS OF DECEMBER 31 2000 (1)AS OF MARCH 31 2001 (6)!THE YEARS ENDED DECEMBER 31 200AS OF DECEMBER 31 2000 (2)DECEMBER 31 2000 AND 1999EFFECTIVE DECEMBER 31 2000 EFFECTIVE DECEMBER 31 2000 (1) RECITALS RECITALS (1) SUPPLEMENTAL INFORMATION TABLEBalance SheetIncome Statement (2) STATEMENTS OF PARTNERS CAPITALCash Flows (1)NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCING A! NOTE 5 OIL AND GAS PRODUCI (1)! NOTE 6 RELATED PARTY TRANSACTI! NOTE 6 RELATED PARTY TRANS (1)! NOTE 7 OIL AND GAS INFORMATION! NOTE 7 OIL AND GAS INFORMA (1)! NOTE 7 OIL AND GAS INFORMA (2)!11 PAGE 163 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA SUPPLEMENTAL INFORMATION T (1)Balance Sheet (1)Income Statement (3) STATEMENTS OF PARTNERS CAP (1)Cash Flows (2)NOTE 4 INCOME TAXES (1)! NOTE 5 OIL AND GAS PRODUCI (2)! NOTE 5 OIL AND GAS PRODUCI (3)! 9 PAGE 180 NOTE 6 RELATED PAR! 9 PAGE 180 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORMA (3)! NOTE 7 OIL AND GAS INFORMA (4)! NOTE 7 OIL AND GAS INFORMA (5)!11 PAGE 182 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (1) SUPPLEMENTAL INFORMATION T (2) ITEM 6 SELECTED FINANCIAL DATAINDEX TO FINANCIAL STATEMENTSBalance Sheet (2)Income Statement (4) STATEMENTS OF PARTNERS CAP (2)Cash Flows (3)!15 PAGE 205 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCI (4)! NOTE 5 OIL AND GAS PRODUCI (5)! NOTE 6 RELATED PARTY TRANS (2)! NOTE 6 RELATED PARTY TRANS (3)! NOTE 7 OIL AND GAS INFORMA (6)! NOTE 7 OIL AND GAS INFORMA (7)! NOTE 7 OIL AND GAS INFORMA (8)! NOTE 7 OIL AND GAS INFORMA (9)! NOTE 7 OIL AND GAS INFORM (10)! 18 PAGE 208 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECUTIVEBeneficial OwnershipPARKER PARSLEY 82I LTDINDEX TO EXHIBITSSELECTED FINANCIAL DATA (2) SUPPLEMENTAL INFORMATION T (3) ITEM 6 SELECTED FINANCIAL (1)INDEX TO FINANCIAL STATEM (1)Balance Sheet (3)Income Statement (5) STATEMENTS OF PARTNERS CAP (3)Cash Flows (4)NOTE 4 INCOME TAXES (2)! NOTE 5 OIL AND GAS PRODUCI (6)! NOTE 5 OIL AND GAS PRODUCI (7)! 16 PAGE 236 NOTE 6 RELATED PAR! 16 PAGE 236 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (11)! NOTE 7 OIL AND GAS INFORM (12)! NOTE 7 OIL AND GAS INFORM (13)!18 PAGE 238 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (1)Beneficial Ownership (1)PARKER PARSLEY 82II LTDINDEX TO EXHIBITS (1)SELECTED FINANCIAL DATA (3) SUPPLEMENTAL INFORMATION T (4)Balance Sheet (4)Income Statement (6) STATEMENTS OF PARTNERS CAP (4)Cash Flows (5)NOTE 4 INCOME TAXES (3)! NOTE 5 OIL AND GAS PRODUCI (8)! NOTE 5 OIL AND GAS PRODUCI (9)! 9 PAGE 259 NOTE 6 RELATED PART! 9 PAGE 259 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (14)! NOTE 7 OIL AND GAS INFORM (15)! NOTE 7 OIL AND GAS INFORM (16)!11 PAGE 261 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (4) SUPPLEMENTAL INFORMATION T (5)PARKER PARSLEY 83A LTD ITEM 6 SELECTED FINANCIAL (2)INDEX TO FINANCIAL STATEM (2)Balance Sheet (5)Income Statement (7) STATEMENTS OF PARTNERS CAP (5)Cash Flows (6)NOTE 4 INCOME TAXES (4)! NOTE 5 OIL AND GAS PRODUC (10)! NOTE 5 OIL AND GAS PRODUC (11)! 16 PAGE 285 NOTE 6 RELATED PAR! 16 PAGE 285 NOTE 6 RELATED (1)!NOTE 7 OIL AND GAS INFORMATION  NOTE 7 OIL AND GAS INFORMA (1) NOTE 7 OIL AND GAS INFORMA (2)! 18 PAGE 287 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECU (2)Beneficial Ownership (2)PARKER PARSLEY 83A LTD (1)INDEX TO EXHIBITS (2)SELECTED FINANCIAL DATA (5) SUPPLEMENTAL INFORMATION T (6)PARKER PARSLEY 83B LTD ITEM 6 SELECTED FINANCIAL (3)INDEX TO FINANCIAL STATEM (3)Balance Sheet (6)Income Statement (8) STATEMENTS OF PARTNERS CAP (6)Cash Flows (7)NOTE 4 INCOME TAXES (5)! NOTE 5 OIL AND GAS PRODUC (12)! NOTE 5 OIL AND GAS PRODUC (13)! 16 PAGE 315 NOTE 6 RELATED PAR! 16 PAGE 315 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (3) NOTE 7 OIL AND GAS INFORMA (4) NOTE 7 OIL AND GAS INFORMA (5)!18 PAGE 317 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (3)Beneficial Ownership (3)PARKER PARSLEY 83B LTD (1)INDEX TO EXHIBITS (3)SELECTED FINANCIAL DATA (6) SUPPLEMENTAL INFORMATION T (7)PARKER PARSLEY 84A LTD ITEM 6 SELECTED FINANCIAL (4)INDEX TO FINANCIAL STATEM (4)Balance Sheet (7)Income Statement (9) STATEMENTS OF PARTNERS CAP (7)Cash Flows (8)!15 PAGE 344 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (14)! NOTE 5 OIL AND GAS PRODUC (15)! 16 PAGE 345 NOTE 6 RELATED PAR! 16 PAGE 345 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (6) NOTE 7 OIL AND GAS INFORMA (7) NOTE 7 OIL AND GAS INFORMA (8)!18 PAGE 347 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (4)Beneficial Ownership (4)PARKER PARSLEY 84A LTD (1)INDEX TO EXHIBITS (4)SELECTED FINANCIAL DATA (7) SUPPLEMENTAL INFORMATION T (8)PARKER PARSLEY 85A LTD ITEM 6 SELECTED FINANCIAL (5)INDEX TO FINANCIAL STATEM (5)Balance Sheet (8)Income Statement (10) STATEMENTS OF PARTNERS CAP (8)Cash Flows (9)NOTE 4 INCOME TAXES (6)! NOTE 5 OIL AND GAS PRODUC (16)! NOTE 5 OIL AND GAS PRODUC (17)! 16 PAGE 375 NOTE 6 RELATED PAR! 16 PAGE 375 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (9) NOTE 7 OIL AND GAS INFORM (10) NOTE 7 OIL AND GAS INFORM (11)!18 PAGE 377 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (5)Beneficial Ownership (5)PARKER PARSLEY 85A LTD (1)INDEX TO EXHIBITS (5)SELECTED FINANCIAL DATA (8) SUPPLEMENTAL INFORMATION T (9)PARKER PARSLEY 85B LTD ITEM 6 SELECTED FINANCIAL (6)!7 PAGE 396 ITEM 8 FINANCIAL STABalance Sheet (9) STATEMENTS OF PARTNERS CAP (9)Cash Flows (10)!15 PAGE 404 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (18)! NOTE 5 OIL AND GAS PRODUC (19)! 16 PAGE 405 NOTE 6 RELATED PAR! 16 PAGE 405 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (12) NOTE 7 OIL AND GAS INFORM (13) NOTE 7 OIL AND GAS INFORM (14)!18 PAGE 407 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (6)Beneficial Ownership (6)PARKER PARSLEY 85B LTD (1)INDEX TO EXHIBITS (6)SELECTED FINANCIAL DATA (9) SUPPLEMENTAL INFORMATION (10)Balance Sheet (10)Income Statement (11) STATEMENTS OF PARTNERS CA (10)Cash Flows (11)NOTE 4 INCOME TAXES (7)! NOTE 5 OIL AND GAS PRODUC (20)! NOTE 5 OIL AND GAS PRODUC (21)! 9 PAGE 428 NOTE 6 RELATED PART! 9 PAGE 428 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (15) NOTE 7 OIL AND GAS INFORM (16) NOTE 7 OIL AND GAS INFORM (17)! 11 PAGE 430 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (10) SUPPLEMENTAL INFORMATION (11)Balance Sheet (11)Income Statement (12) STATEMENTS OF PARTNERS CA (11)Cash Flows (12) 8 PAGE 446 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (22)! NOTE 5 OIL AND GAS PRODUC (23)! 9 PAGE 447 NOTE 6 RELATED PART! 9 PAGE 447 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (18) NOTE 7 OIL AND GAS INFORM (19) NOTE 7 OIL AND GAS INFORM (20)! 11 PAGE 449 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (11) SUPPLEMENTAL INFORMATION (12)PARKER PARSLEY 86A LTD ITEM 6 SELECTED FINANCIAL (7)INDEX TO FINANCIAL STATEM (6)Balance Sheet (12)Income Statement (13) STATEMENTS OF PARTNERS CA (12)Cash Flows (13)NOTE 4 INCOME TAXES (8)! NOTE 5 OIL AND GAS PRODUC (24)! NOTE 5 OIL AND GAS PRODUC (25)! 16 PAGE 473 NOTE 6 RELATED PAR! 16 PAGE 473 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (21) NOTE 7 OIL AND GAS INFORM (22) NOTE 7 OIL AND GAS INFORM (23)!18 PAGE 475 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (7)Beneficial Ownership (7)PARKER PARSLEY 86A LTD (1)INDEX TO EXHIBITS (7)SELECTED FINANCIAL DATA (12) SUPPLEMENTAL INFORMATION (13)PARKER PARSLEY 86B LTD ITEM 6 SELECTED FINANCIAL (8)INDEX TO FINANCIAL STATEM (7)Balance Sheet (13)Income Statement (14) STATEMENTS OF PARTNERS CA (13)Cash Flows (14)!16 PAGE 503 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (26)! NOTE 5 OIL AND GAS PRODUC (27)! NOTE 6 RELATED PARTY TRANS (4)! NOTE 6 RELATED PARTY TRANS (5) NOTE 7 OIL AND GAS INFORM (24) NOTE 7 OIL AND GAS INFORM (25) NOTE 7 OIL AND GAS INFORM (26)!19 PAGE 506 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (8)Beneficial Ownership (8)PARKER PARSLEY 86B LTD (1)INDEX TO EXHIBITS (8)SELECTED FINANCIAL DATA (13) SUPPLEMENTAL INFORMATION (14) ITEM 6 SELECTED FINANCIAL (9)!7 PAGE 525 ITEM 8 FINANCIAL STABalance Sheet (14)Income Statement (15) STATEMENTS OF PARTNERS CA (14)Cash Flows (15)NOTE 4 INCOME TAXES (9)! NOTE 5 OIL AND GAS PRODUC (28)! NOTE 5 OIL AND GAS PRODUC (29)! 16 PAGE 534 NOTE 6 RELATED PAR! 16 PAGE 534 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (27) NOTE 7 OIL AND GAS INFORM (28) NOTE 7 OIL AND GAS INFORM (29)!18 PAGE 536 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (9)Beneficial Ownership (9)PARKER PARSLEY 86C LTDSELECTED FINANCIAL DATA (14) SUPPLEMENTAL INFORMATION (15)Balance Sheet (15)Income Statement (16) STATEMENTS OF PARTNERS CA (15)Cash Flows (16) 8 PAGE 556 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (30)! NOTE 5 OIL AND GAS PRODUC (31)! NOTE 6 RELATED PARTY TRANS (6)! NOTE 6 RELATED PARTY TRANS (7) NOTE 7 OIL AND GAS INFORM (30) NOTE 7 OIL AND GAS INFORM (31) NOTE 7 OIL AND GAS INFORM (32)! 11 PAGE 559 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (15) SUPPLEMENTAL INFORMATION (16)Balance Sheet (16)Income Statement (17) STATEMENTS OF PARTNERS CA (16)Cash Flows (17)NOTE 4 INCOME TAXES (10)! NOTE 5 OIL AND GAS PRODUC (32)! NOTE 5 OIL AND GAS PRODUC (33)! 9 PAGE 576 NOTE 6 RELATED PART! 9 PAGE 576 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (33) NOTE 7 OIL AND GAS INFORM (34) NOTE 7 OIL AND GAS INFORM (35)!11 PAGE 578 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (16) SUPPLEMENTAL INFORMATION (17) ITEM 6 SELECTED FINANCIAL (10)!8 PAGE 594 ITEM 8 FINANCIAL STABalance Sheet (17)Income Statement (18) STATEMENTS OF PARTNERS CA (17)Cash Flows (18)NOTE 4 INCOME TAXES (11)! NOTE 5 OIL AND GAS PRODUC (34)! NOTE 5 OIL AND GAS PRODUC (35)! 17 PAGE 603 NOTE 6 RELATED PAR! 17 PAGE 603 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (36) NOTE 7 OIL AND GAS INFORM (37) NOTE 7 OIL AND GAS INFORM (38)! 19 PAGE 605 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (10)Beneficial Ownership (10)PARKER PARSLEY 87A LTDSELECTED FINANCIAL DATA (17) SUPPLEMENTAL INFORMATION (18)Balance Sheet (18)Income Statement (19) STATEMENTS OF PARTNERS CA (18)Cash Flows (19) 8 PAGE 625 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (36)! NOTE 5 OIL AND GAS PRODUC (37)! 9 PAGE 626 NOTE 6 RELATED PART! 9 PAGE 626 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (39) NOTE 7 OIL AND GAS INFORM (40) NOTE 7 OIL AND GAS INFORM (41)! 11 PAGE 628 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (18) SUPPLEMENTAL INFORMATION (19) ITEM 6 SELECTED FINANCIAL (11)INDEX TO FINANCIAL STATEM (8)Balance Sheet (19)Income Statement (20) STATEMENTS OF PARTNERS CA (19)Cash Flows (20)NOTE 4 INCOME TAXES (12)! NOTE 5 OIL AND GAS PRODUC (38)! NOTE 5 OIL AND GAS PRODUC (39)! 17 PAGE 653 NOTE 6 RELATED PAR! 17 PAGE 653 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (42) NOTE 7 OIL AND GAS INFORM (43) NOTE 7 OIL AND GAS INFORM (44)! 19 PAGE 655 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (11)Beneficial Ownership (11)PARKER PARSLEY 87B LTDINDEX TO EXHIBITS (9)SELECTED FINANCIAL DATA (19) SUPPLEMENTAL INFORMATION (20) ITEM 6 SELECTED FINANCIAL (12)INDEX TO FINANCIAL STATEM (9)Balance Sheet (20)Income Statement (21) STATEMENTS OF PARTNERS CA (20)Cash Flows (21)!16 PAGE 683 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (40)! NOTE 5 OIL AND GAS PRODUC (41)! NOTE 6 RELATED PARTY TRANS (8)! NOTE 6 RELATED PARTY TRANS (9) NOTE 7 OIL AND GAS INFORM (45) NOTE 7 OIL AND GAS INFORM (46) NOTE 7 OIL AND GAS INFORM (47)!19 PAGE 686 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (12)Beneficial Ownership (12)PROPERTIES 87A LTDINDEX TO EXHIBITS (10)SELECTED FINANCIAL DATA (20) SUPPLEMENTAL INFORMATION (21) ITEM 6 SELECTED FINANCIAL (13)INDEX TO FINANCIAL STATE (10)Balance Sheet (21)Income Statement (22) STATEMENTS OF PARTNERS CA (21)Cash Flows (22)!16 PAGE 714 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (42)! NOTE 5 OIL AND GAS PRODUC (43)! 17 PAGE 715 NOTE 6 RELATED PAR! 17 PAGE 715 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (48) NOTE 7 OIL AND GAS INFORM (49) NOTE 7 OIL AND GAS INFORM (50)! 19 PAGE 717 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (13)Beneficial Ownership (13)PROPERTIES 87B LTDINDEX TO EXHIBITS (11)SELECTED FINANCIAL DATA (21) SUPPLEMENTAL INFORMATION (22)Balance Sheet (22)Income Statement (23) STATEMENTS OF PARTNERS CA (22)Cash Flows (23) 8 PAGE 737 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (44)! NOTE 5 OIL AND GAS PRODUC (45)! 9 PAGE 738 NOTE 6 RELATED PART! 9 PAGE 738 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (51) NOTE 7 OIL AND GAS INFORM (52) NOTE 7 OIL AND GAS INFORM (53)! 11 PAGE 740 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (22) SUPPLEMENTAL INFORMATION (23)Balance Sheet (23)Income Statement (24) STATEMENTS OF PARTNERS CA (23)Cash Flows (24) 8 PAGE 756 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (46)! NOTE 5 OIL AND GAS PRODUC (47)! 9 PAGE 757 NOTE 6 RELATED PART! 9 PAGE 757 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (54) NOTE 7 OIL AND GAS INFORM (55) NOTE 7 OIL AND GAS INFORM (56)! 11 PAGE 759 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (23)!31 2000 1 PAGE 766 PARKER PARSLPARKER PARSLEY 88A LP ITEM 6 SELECTED FINANCIAL (14)INDEX TO FINANCIAL STATE (11)Balance Sheet (24)Income Statement (25) STATEMENTS OF PARTNERS CA (24)Cash Flows (25)NOTE 4 INCOME TAXES (13)! NOTE 5 OIL AND GAS PRODUC (48)! NOTE 5 OIL AND GAS PRODUC (49)! 16 PAGE 783 NOTE 6 RELATED PAR! 16 PAGE 783 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (57) NOTE 7 OIL AND GAS INFORM (58) NOTE 7 OIL AND GAS INFORM (59)! 18 PAGE 785 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (14)Beneficial Ownership (14)PARKER PARSLEY 88A LP (1)INDEX TO EXHIBITS (12)SELECTED FINANCIAL DATA (24) SUPPLEMENTAL INFORMATION (24)Balance Sheet (25)Income Statement (26) STATEMENTS OF PARTNERS CA (25)Cash Flows (26) 8 PAGE 805 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (50)! NOTE 5 OIL AND GAS PRODUC (51)! 9 PAGE 806 NOTE 6 RELATED PART! 9 PAGE 806 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (60) NOTE 7 OIL AND GAS INFORM (61) NOTE 7 OIL AND GAS INFORM (62)! 11 PAGE 808 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (25)!31 2000 1 PAGE 815 PARKER PARSLPARKER PARSLEY 88B LP ITEM 6 SELECTED FINANCIAL (15)INDEX TO FINANCIAL STATE (12)Balance Sheet (26)Income Statement (27) STATEMENTS OF PARTNERS CA (26)Cash Flows (27)!16 PAGE 832 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (52)! NOTE 5 OIL AND GAS PRODUC (53)! 17 PAGE 833 NOTE 6 RELATED PAR! 17 PAGE 833 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (63) NOTE 7 OIL AND GAS INFORM (64) NOTE 7 OIL AND GAS INFORM (65)! 19 PAGE 835 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (15)Beneficial Ownership (15)PARKER PARSLEY 88B LP (1)INDEX TO EXHIBITS (13)SELECTED FINANCIAL DATA (26) SUPPLEMENTAL INFORMATION (25)Balance Sheet (27)Income Statement (28) STATEMENTS OF PARTNERS CA (27)Cash Flows (28) 8 PAGE 855 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (54)! NOTE 5 OIL AND GAS PRODUC (55)! 9 PAGE 856 NOTE 6 RELATED PART! 9 PAGE 856 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (66) NOTE 7 OIL AND GAS INFORM (67) NOTE 7 OIL AND GAS INFORM (68)! 11 PAGE 858 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (27)!31 2000 1 PAGE 865 PARKER PARSLBalance Sheet (28)Income Statement (29) STATEMENTS OF PARTNERS CA (28)Cash Flows (29) 8 PAGE 874 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (56)! NOTE 5 OIL AND GAS PRODUC (57)! 9 PAGE 875 NOTE 6 RELATED PART! 9 PAGE 875 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (69) NOTE 7 OIL AND GAS INFORM (70) NOTE 7 OIL AND GAS INFORM (71)! 11 PAGE 877 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (28) SUPPLEMENTAL INFORMATION (26)!PARKER PARSLEY PRODUCING PROPER ITEM 6 SELECTED FINANCIAL (16)INDEX TO FINANCIAL STATE (13)Balance Sheet (29)Income Statement (30) STATEMENTS OF PARTNERS CA (29)Cash Flows (30)NOTE 4 INCOME TAXES (14)! NOTE 5 OIL AND GAS PRODUC (58)! NOTE 5 OIL AND GAS PRODUC (59)! 16 PAGE 901 NOTE 6 RELATED PAR! 16 PAGE 901 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (72) NOTE 7 OIL AND GAS INFORM (73)!18 PAGE 903 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (16)Beneficial Ownership (16)PROPERTIES 88A LPINDEX TO EXHIBITS (14)SELECTED FINANCIAL DATA (29) SUPPLEMENTAL INFORMATION (27)Balance Sheet (30)Income Statement (31) STATEMENTS OF PARTNERS CA (30)Cash Flows (31)NOTE 4 INCOME TAXES (15)! NOTE 5 OIL AND GAS PRODUC (60)! NOTE 5 OIL AND GAS PRODUC (61)! 9 PAGE 924 NOTE 6 RELATED PART! 9 PAGE 924 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (74) NOTE 7 OIL AND GAS INFORM (75) NOTE 7 OIL AND GAS INFORM (76)! 11 PAGE 926 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (30) SUPPLEMENTAL INFORMATION (28)Balance Sheet (31)Income Statement (32) STATEMENTS OF PARTNERS CA (31)Cash Flows (32)NOTE 4 INCOME TAXES (16)! NOTE 5 OIL AND GAS PRODUC (62)! NOTE 5 OIL AND GAS PRODUC (63)! 9 PAGE 943 NOTE 6 RELATED PART! 9 PAGE 943 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (77) NOTE 7 OIL AND GAS INFORM (78) NOTE 7 OIL AND GAS INFORM (79)!11 PAGE 945 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (31)!31 2000 1 PAGE 952 PARKER PARSLPARKER PARSLEY 89A LP ITEM 6 SELECTED FINANCIAL (17)INDEX TO FINANCIAL STATE (14)Balance Sheet (32)Income Statement (33) STATEMENTS OF PARTNERS CA (32)Cash Flows (33)NOTE 4 INCOME TAXES (17)! NOTE 5 OIL AND GAS PRODUC (64)! NOTE 5 OIL AND GAS PRODUC (65)! 16 PAGE 969 NOTE 6 RELATED PAR! 16 PAGE 969 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (80) NOTE 7 OIL AND GAS INFORM (81) NOTE 7 OIL AND GAS INFORM (82) NOTE 7 OIL AND GAS INFORM (83)! 18 PAGE 971 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (17)Beneficial Ownership (17)PARKER PARSLEY 89A LP (1)INDEX TO EXHIBITS (15)SELECTED FINANCIAL DATA (32) SUPPLEMENTAL INFORMATION (29)Balance Sheet (33)Income Statement (34) STATEMENTS OF PARTNERS CA (33)Cash Flows (34) 8 PAGE 991 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (66)! NOTE 5 OIL AND GAS PRODUC (67)! 9 PAGE 992 NOTE 6 RELATED PART! 9 PAGE 992 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (84) NOTE 7 OIL AND GAS INFORM (85) NOTE 7 OIL AND GAS INFORM (86)! 11 PAGE 994 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (33)!31 2000 1 PAGE 1001 PARKER PARSBalance Sheet (34)Income Statement (35) STATEMENTS OF PARTNERS CA (34)Cash Flows (35)!8 PAGE 1010 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (68)! NOTE 5 OIL AND GAS PRODUC (69)! 9 PAGE 1011 NOTE 6 RELATED PAR! 9 PAGE 1011 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (87) NOTE 7 OIL AND GAS INFORM (88) NOTE 7 OIL AND GAS INFORM (89)!11 PAGE 1013 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (34) SUPPLEMENTAL INFORMATION (30)Balance Sheet (35)Income Statement (36) STATEMENTS OF PARTNERS CA (35)Cash Flows (36)!8 PAGE 1029 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (70)! NOTE 5 OIL AND GAS PRODUC (71)! 9 PAGE 1030 NOTE 6 RELATED PAR! 9 PAGE 1030 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (90) NOTE 7 OIL AND GAS INFORM (91) NOTE 7 OIL AND GAS INFORM (92)! 11 PAGE 1032 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (35) SUPPLEMENTAL INFORMATION (31)Balance Sheet (36)Income Statement (37) STATEMENTS OF PARTNERS CA (36)Cash Flows (37)!8 PAGE 1048 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (72)! NOTE 5 OIL AND GAS PRODUC (73)! 9 PAGE 1049 NOTE 6 RELATED PAR! 9 PAGE 1049 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (93) NOTE 7 OIL AND GAS INFORM (94) NOTE 7 OIL AND GAS INFORM (95)! 11 PAGE 1051 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (36)!31 2000 1 PAGE 1058 PARKER PARSPARKER PARSLEY 90A LP ITEM 6 SELECTED FINANCIAL (18)INDEX TO FINANCIAL STATE (15)Balance Sheet (37)Income Statement (38) STATEMENTS OF PARTNERS CA (37)Cash Flows (38)!15 PAGE 1074 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (74)! NOTE 5 OIL AND GAS PRODUC (75)! NOTE 6 RELATED PARTY TRAN (10)! NOTE 6 RELATED PARTY TRAN (11) NOTE 7 OIL AND GAS INFORM (96) NOTE 7 OIL AND GAS INFORM (97)! 18 PAGE 1077 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (18)Beneficial Ownership (18)PARKER PARSLEY 90A LP (1)INDEX TO EXHIBITS (16)SELECTED FINANCIAL DATA (37) SUPPLEMENTAL INFORMATION (32)PARKER PARSLEY 90B CONV LP ITEM 6 SELECTED FINANCIAL (19)INDEX TO FINANCIAL STATE (16)Balance Sheet (38)Income Statement (39) STATEMENTS OF PARTNERS CA (38)Cash Flows (39)!16 PAGE 1105 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (76)! NOTE 5 OIL AND GAS PRODUC (77)! NOTE 6 RELATED PARTY TRAN (12)! NOTE 6 RELATED PARTY TRAN (13) NOTE 7 OIL AND GAS INFORM (98) NOTE 7 OIL AND GAS INFORM (99) NOTE 7 OIL AND GAS INFOR (100)! 19 PAGE 1108 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (19)Beneficial Ownership (19) PARKER PARSLEY 90B CONV LP (1)INDEX TO EXHIBITS (17)SELECTED FINANCIAL DATA (38)!31 2000 1 PAGE 1119 PARKER PARSPARKER PARSLEY 90B LP ITEM 6 SELECTED FINANCIAL (20)INDEX TO FINANCIAL STATE (17)Balance Sheet (39)Income Statement (40) STATEMENTS OF PARTNERS CA (39)Cash Flows (40)!16 PAGE 1136 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (78)! NOTE 5 OIL AND GAS PRODUC (79)! NOTE 6 RELATED PARTY TRAN (14)! NOTE 6 RELATED PARTY TRAN (15) NOTE 7 OIL AND GAS INFOR (101) NOTE 7 OIL AND GAS INFOR (102) NOTE 7 OIL AND GAS INFOR (103)! 19 PAGE 1139 NOTE 8 MAJOR CUS!ITEM 10 DIRECTORS AND EXEC (20)Beneficial Ownership (20)PARKER PARSLEY 90B LP (1)INDEX TO EXHIBITS (18)SELECTED FINANCIAL DATA (39) SUPPLEMENTAL INFORMATION (33)PARKER PARSLEY 90C CONV LP ITEM 6 SELECTED FINANCIAL (21)INDEX TO FINANCIAL STATE (18)Balance Sheet (40)Income Statement (41) STATEMENTS OF PARTNERS CA (40)Cash Flows (41)!15 PAGE 1166 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (80)! NOTE 5 OIL AND GAS PRODUC (81)! NOTE 6 RELATED PARTY TRAN (16)! NOTE 6 RELATED PARTY TRAN (17) NOTE 7 OIL AND GAS INFOR (104) NOTE 7 OIL AND GAS INFOR (105) NOTE 7 OIL AND GAS INFOR (106)! 18 PAGE 1169 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (21)Beneficial Ownership (21) PARKER PARSLEY 90C CONV LP (1)INDEX TO EXHIBITS (19)SELECTED FINANCIAL DATA (40)!31 2000 1 PAGE 1180 PARKER PARSPARKER PARSLEY 90C LP ITEM 6 SELECTED FINANCIAL (22)INDEX TO FINANCIAL STATE (19)Balance Sheet (41)Income Statement (42) STATEMENTS OF PARTNERS CA (41)Cash Flows (42)!15 PAGE 1196 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (82)! NOTE 5 OIL AND GAS PRODUC (83)! NOTE 6 RELATED PARTY TRAN (18)! NOTE 6 RELATED PARTY TRAN (19) NOTE 7 OIL AND GAS INFOR (107) NOTE 7 OIL AND GAS INFOR (108) NOTE 7 OIL AND GAS INFOR (109)! 18 PAGE 1199 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (22)Beneficial Ownership (22)PARKER PARSLEY 90C LP (1)INDEX TO EXHIBITS (20)SELECTED FINANCIAL DATA (41) SUPPLEMENTAL INFORMATION (34)Balance Sheet (42)Income Statement (43) STATEMENTS OF PARTNERS CA (42)Cash Flows (43)!8 PAGE 1219 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (84)! NOTE 5 OIL AND GAS PRODUC (85)! 9 PAGE 1220 NOTE 6 RELATED PAR! 9 PAGE 1220 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (110) NOTE 7 OIL AND GAS INFOR (111) NOTE 7 OIL AND GAS INFOR (112)! 11 PAGE 1222 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (42) SUPPLEMENTAL INFORMATION (35)Balance Sheet (43)Income Statement (44) STATEMENTS OF PARTNERS CA (43)Cash Flows (44)!8 PAGE 1238 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (86)! NOTE 5 OIL AND GAS PRODUC (87)! 9 PAGE 1239 NOTE 6 RELATED PAR! 9 PAGE 1239 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (113) NOTE 7 OIL AND GAS INFOR (114) NOTE 7 OIL AND GAS INFOR (115)! 11 PAGE 1241 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (43)!31 2000 1 PAGE 1248 PARKER PARSPARKER PARSLEY 91A LP ITEM 6 SELECTED FINANCIAL (23)INDEX TO FINANCIAL STATE (20)Balance Sheet (44)Income Statement (45) STATEMENTS OF PARTNERS CA (44)Cash Flows (45)!15 PAGE 1264 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (88)! NOTE 5 OIL AND GAS PRODUC (89)! NOTE 6 RELATED PARTY TRAN (20)! NOTE 6 RELATED PARTY TRAN (21) NOTE 7 OIL AND GAS INFOR (116) NOTE 7 OIL AND GAS INFOR (117) NOTE 7 OIL AND GAS INFOR (118)! 18 PAGE 1267 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (23)Beneficial Ownership (23)PARKER PARSLEY 91A LP (1)INDEX TO EXHIBITS (21)SELECTED FINANCIAL DATA (44)!31 2000 1 PAGE 1278 PARKER PARSPARKER PARSLEY 91B LP ITEM 6 SELECTED FINANCIAL (24)INDEX TO FINANCIAL STATE (21)Balance Sheet (45)Income Statement (46) STATEMENTS OF PARTNERS CA (45)Cash Flows (46)!15 PAGE 1294 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (90)! NOTE 5 OIL AND GAS PRODUC (91)! NOTE 6 RELATED PARTY TRAN (22)! NOTE 6 RELATED PARTY TRAN (23) NOTE 7 OIL AND GAS INFOR (119) NOTE 7 OIL AND GAS INFOR (120) NOTE 7 OIL AND GAS INFOR (121)! 18 PAGE 1297 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (24)Beneficial Ownership (24)PARKER PARSLEY 91B LP (1)INDEX TO EXHIBITS (22)SELECTED FINANCIAL DATA (45)POWER OF ATTORNEYPOWER OF ATTORNEY (1)POWER OF ATTORNEY (2)POWER OF ATTORNEY (3)POWER OF ATTORNEY (4)POWER OF ATTORNEY (5)POWER OF ATTORNEY (6)POWER OF ATTORNEY (7)!2001 THE BOARD OF DIRECTORS REC!2001 THE BOARD OF DIRECTORS (1)!2001 THE BOARD OF DIRECTORS (2)PAGE 2U } m)} a/     $PIONEER NATURAL RESOURCES CO S-4 04/17/200191NONMANAGING GENERAL PARTNERS OF SOME PARTNERSHIPS  PARTNERSHIP# NONMANAGING GENERAL PARTNER   ( Parker & Parsley 81-I, Ltd.-%Parker & Parsley Employees 81-I, Ltd.)! Parker & Parsley 81-II, Ltd..&Parker & Parsley Employees 81-II, Ltd.( Parker & Parsley 82-I, Ltd.-%Parker & Parsley Employees 82-I, Ltd.)! Parker & Parsley 82-II, Ltd..&Parker & Parsley Employees 82-II, Ltd.*" Parker & Parsley 82-III, Ltd./'Parker & Parsley Employees 82-III, Ltd.( Parker & Parsley 83-A, Ltd.-%Parker & Parsley Employees 83-A, Ltd.( Parker & Parsley 83-B, Ltd.-%Parker & Parsley Employees 83-B, Ltd.( Parker & Parsley 84-A, Ltd.-%Parker & Parsley Employees 84-A, Ltd.$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/8j^RF:{`E=PF0*8X> @ l    dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/?? SECURITIES AND EXC!CALCULATION OF REGISTRATION FEETO BE HELD ON 2001TABLE OF CONTENTSPAGE 7 LIST OF APPENDICES!LIMITED PARTNER INVESTMENT REPA!LIMITED PARTNER INVESTMENT (1) 5 PAGE 15 NYMEX FUTURES PRICES!EXAMPLE CALCULATION OF MERGER VIncome StatementIncome Statement (1)AT DECEMBER 31 2000!15 PAGE 25 COMPARATIVE PER SHAR!25 PAGE 35 REASONS FOR THE MERGFAIRNESS OPINIONFAIRNESS OPINION (1)!LEGAL OPINION FOR LIMITED PARTN!LEGAL OPINION FOR LIMITED P (1)!NONMANAGING GENERAL PARTNERS OF!58 PAGE 68 COMPARATIVE PER SHAR!60 PAGE 70 OWNERSHIP OF PARTNER PIONEER PIONEER USATHE DRILLING PARTNERSHIPSTHE DRILLING PARTNERSHIPS (1)THE INCOME PARTNERSHIPS INTERESTSINTERESTS (1)INTERESTS (2)INTERESTS (3)INTERESTS (4)INTERESTS (5)!WHERE YOU CAN FIND MORE INFORMAAS OF DECEMBER 31 2000YEAR ENDED DECEMBER 31 2000!QUANTITIES OF OIL AND GAS RESER!STANDARDIZED MEASURE OF DISCOUN CASH FLOWSAS OF MARCH 31 2001AS OF MARCH 31 2001 (1)AS OF MARCH 31 2001 (2)AS OF MARCH 31 2001 (3)AS OF MARCH 31 2001 (4)AS OF MARCH 31 2001 (5)!FROM INCEPTION THROUGH MARCH 31!ANNUAL REPURCHASE PRICES AND AGOF EACH PARTNERSHIP!FOR THE THREE MONTHS ENDED MARCAS OF DECEMBER 31 2000 (1)AS OF MARCH 31 2001 (6)!THE YEARS ENDED DECEMBER 31 200AS OF DECEMBER 31 2000 (2)DECEMBER 31 2000 AND 1999EFFECTIVE DECEMBER 31 2000 EFFECTIVE DECEMBER 31 2000 (1) RECITALS RECITALS (1) SUPPLEMENTAL INFORMATION TABLEBalance SheetIncome Statement (2) STATEMENTS OF PARTNERS CAPITALCash Flows (1)NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCING A! NOTE 5 OIL AND GAS PRODUCI (1)! NOTE 6 RELATED PARTY TRANSACTI! NOTE 6 RELATED PARTY TRANS (1)! NOTE 7 OIL AND GAS INFORMATION! NOTE 7 OIL AND GAS INFORMA (1)! NOTE 7 OIL AND GAS INFORMA (2)!11 PAGE 163 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA SUPPLEMENTAL INFORMATION T (1)Balance Sheet (1)Income Statement (3) STATEMENTS OF PARTNERS CAP (1)Cash Flows (2)NOTE 4 INCOME TAXES (1)! NOTE 5 OIL AND GAS PRODUCI (2)! NOTE 5 OIL AND GAS PRODUCI (3)! 9 PAGE 180 NOTE 6 RELATED PAR! 9 PAGE 180 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORMA (3)! NOTE 7 OIL AND GAS INFORMA (4)! NOTE 7 OIL AND GAS INFORMA (5)!11 PAGE 182 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (1) SUPPLEMENTAL INFORMATION T (2) ITEM 6 SELECTED FINANCIAL DATAINDEX TO FINANCIAL STATEMENTSBalance Sheet (2)Income Statement (4) STATEMENTS OF PARTNERS CAP (2)Cash Flows (3)!15 PAGE 205 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCI (4)! NOTE 5 OIL AND GAS PRODUCI (5)! NOTE 6 RELATED PARTY TRANS (2)! NOTE 6 RELATED PARTY TRANS (3)! NOTE 7 OIL AND GAS INFORMA (6)! NOTE 7 OIL AND GAS INFORMA (7)! NOTE 7 OIL AND GAS INFORMA (8)! NOTE 7 OIL AND GAS INFORMA (9)! NOTE 7 OIL AND GAS INFORM (10)! 18 PAGE 208 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECUTIVEBeneficial OwnershipPARKER PARSLEY 82I LTDINDEX TO EXHIBITSSELECTED FINANCIAL DATA (2) SUPPLEMENTAL INFORMATION T (3) ITEM 6 SELECTED FINANCIAL (1)INDEX TO FINANCIAL STATEM (1)Balance Sheet (3)Income Statement (5) STATEMENTS OF PARTNERS CAP (3)Cash Flows (4)NOTE 4 INCOME TAXES (2)! NOTE 5 OIL AND GAS PRODUCI (6)! NOTE 5 OIL AND GAS PRODUCI (7)! 16 PAGE 236 NOTE 6 RELATED PAR! 16 PAGE 236 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (11)! NOTE 7 OIL AND GAS INFORM (12)! NOTE 7 OIL AND GAS INFORM (13)!18 PAGE 238 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (1)Beneficial Ownership (1)PARKER PARSLEY 82II LTDINDEX TO EXHIBITS (1)SELECTED FINANCIAL DATA (3) SUPPLEMENTAL INFORMATION T (4)Balance Sheet (4)Income Statement (6) STATEMENTS OF PARTNERS CAP (4)Cash Flows (5)NOTE 4 INCOME TAXES (3)! NOTE 5 OIL AND GAS PRODUCI (8)! NOTE 5 OIL AND GAS PRODUCI (9)! 9 PAGE 259 NOTE 6 RELATED PART! 9 PAGE 259 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (14)! NOTE 7 OIL AND GAS INFORM (15)! NOTE 7 OIL AND GAS INFORM (16)!11 PAGE 261 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (4) SUPPLEMENTAL INFORMATION T (5)PARKER PARSLEY 83A LTD ITEM 6 SELECTED FINANCIAL (2)INDEX TO FINANCIAL STATEM (2)Balance Sheet (5)Income Statement (7) STATEMENTS OF PARTNERS CAP (5)Cash Flows (6)NOTE 4 INCOME TAXES (4)! NOTE 5 OIL AND GAS PRODUC (10)! NOTE 5 OIL AND GAS PRODUC (11)! 16 PAGE 285 NOTE 6 RELATED PAR! 16 PAGE 285 NOTE 6 RELATED (1)!NOTE 7 OIL AND GAS INFORMATION  NOTE 7 OIL AND GAS INFORMA (1) NOTE 7 OIL AND GAS INFORMA (2)! 18 PAGE 287 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECU (2)Beneficial Ownership (2)PARKER PARSLEY 83A LTD (1)INDEX TO EXHIBITS (2)SELECTED FINANCIAL DATA (5) SUPPLEMENTAL INFORMATION T (6)PARKER PARSLEY 83B LTD ITEM 6 SELECTED FINANCIAL (3)INDEX TO FINANCIAL STATEM (3)Balance Sheet (6)Income Statement (8) STATEMENTS OF PARTNERS CAP (6)Cash Flows (7)NOTE 4 INCOME TAXES (5)! NOTE 5 OIL AND GAS PRODUC (12)! NOTE 5 OIL AND GAS PRODUC (13)! 16 PAGE 315 NOTE 6 RELATED PAR! 16 PAGE 315 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (3) NOTE 7 OIL AND GAS INFORMA (4) NOTE 7 OIL AND GAS INFORMA (5)!18 PAGE 317 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (3)Beneficial Ownership (3)PARKER PARSLEY 83B LTD (1)INDEX TO EXHIBITS (3)SELECTED FINANCIAL DATA (6) SUPPLEMENTAL INFORMATION T (7)PARKER PARSLEY 84A LTD ITEM 6 SELECTED FINANCIAL (4)INDEX TO FINANCIAL STATEM (4)Balance Sheet (7)Income Statement (9) STATEMENTS OF PARTNERS CAP (7)Cash Flows (8)!15 PAGE 344 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (14)! NOTE 5 OIL AND GAS PRODUC (15)! 16 PAGE 345 NOTE 6 RELATED PAR! 16 PAGE 345 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (6) NOTE 7 OIL AND GAS INFORMA (7) NOTE 7 OIL AND GAS INFORMA (8)!18 PAGE 347 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (4)Beneficial Ownership (4)PARKER PARSLEY 84A LTD (1)INDEX TO EXHIBITS (4)SELECTED FINANCIAL DATA (7) SUPPLEMENTAL INFORMATION T (8)PARKER PARSLEY 85A LTD ITEM 6 SELECTED FINANCIAL (5)INDEX TO FINANCIAL STATEM (5)Balance Sheet (8)Income Statement (10) STATEMENTS OF PARTNERS CAP (8)Cash Flows (9)NOTE 4 INCOME TAXES (6)! NOTE 5 OIL AND GAS PRODUC (16)! NOTE 5 OIL AND GAS PRODUC (17)! 16 PAGE 375 NOTE 6 RELATED PAR! 16 PAGE 375 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (9) NOTE 7 OIL AND GAS INFORM (10) NOTE 7 OIL AND GAS INFORM (11)!18 PAGE 377 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (5)Beneficial Ownership (5)PARKER PARSLEY 85A LTD (1)INDEX TO EXHIBITS (5)SELECTED FINANCIAL DATA (8) SUPPLEMENTAL INFORMATION T (9)PARKER PARSLEY 85B LTD ITEM 6 SELECTED FINANCIAL (6)!7 PAGE 396 ITEM 8 FINANCIAL STABalance Sheet (9) STATEMENTS OF PARTNERS CAP (9)Cash Flows (10)!15 PAGE 404 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (18)! NOTE 5 OIL AND GAS PRODUC (19)! 16 PAGE 405 NOTE 6 RELATED PAR! 16 PAGE 405 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (12) NOTE 7 OIL AND GAS INFORM (13) NOTE 7 OIL AND GAS INFORM (14)!18 PAGE 407 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (6)Beneficial Ownership (6)PARKER PARSLEY 85B LTD (1)INDEX TO EXHIBITS (6)SELECTED FINANCIAL DATA (9) SUPPLEMENTAL INFORMATION (10)Balance Sheet (10)Income Statement (11) STATEMENTS OF PARTNERS CA (10)Cash Flows (11)NOTE 4 INCOME TAXES (7)! NOTE 5 OIL AND GAS PRODUC (20)! NOTE 5 OIL AND GAS PRODUC (21)! 9 PAGE 428 NOTE 6 RELATED PART! 9 PAGE 428 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (15) NOTE 7 OIL AND GAS INFORM (16) NOTE 7 OIL AND GAS INFORM (17)! 11 PAGE 430 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (10) SUPPLEMENTAL INFORMATION (11)Balance Sheet (11)Income Statement (12) STATEMENTS OF PARTNERS CA (11)Cash Flows (12) 8 PAGE 446 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (22)! NOTE 5 OIL AND GAS PRODUC (23)! 9 PAGE 447 NOTE 6 RELATED PART! 9 PAGE 447 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (18) NOTE 7 OIL AND GAS INFORM (19) NOTE 7 OIL AND GAS INFORM (20)! 11 PAGE 449 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (11) SUPPLEMENTAL INFORMATION (12)PARKER PARSLEY 86A LTD ITEM 6 SELECTED FINANCIAL (7)INDEX TO FINANCIAL STATEM (6)Balance Sheet (12)Income Statement (13) STATEMENTS OF PARTNERS CA (12)Cash Flows (13)NOTE 4 INCOME TAXES (8)! NOTE 5 OIL AND GAS PRODUC (24)! NOTE 5 OIL AND GAS PRODUC (25)! 16 PAGE 473 NOTE 6 RELATED PAR! 16 PAGE 473 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (21) NOTE 7 OIL AND GAS INFORM (22) NOTE 7 OIL AND GAS INFORM (23)!18 PAGE 475 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (7)Beneficial Ownership (7)PARKER PARSLEY 86A LTD (1)INDEX TO EXHIBITS (7)SELECTED FINANCIAL DATA (12) SUPPLEMENTAL INFORMATION (13)PARKER PARSLEY 86B LTD ITEM 6 SELECTED FINANCIAL (8)INDEX TO FINANCIAL STATEM (7)Balance Sheet (13)Income Statement (14) STATEMENTS OF PARTNERS CA (13)Cash Flows (14)!16 PAGE 503 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (26)! NOTE 5 OIL AND GAS PRODUC (27)! NOTE 6 RELATED PARTY TRANS (4)! NOTE 6 RELATED PARTY TRANS (5) NOTE 7 OIL AND GAS INFORM (24) NOTE 7 OIL AND GAS INFORM (25) NOTE 7 OIL AND GAS INFORM (26)!19 PAGE 506 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (8)Beneficial Ownership (8)PARKER PARSLEY 86B LTD (1)INDEX TO EXHIBITS (8)SELECTED FINANCIAL DATA (13) SUPPLEMENTAL INFORMATION (14) ITEM 6 SELECTED FINANCIAL (9)!7 PAGE 525 ITEM 8 FINANCIAL STABalance Sheet (14)Income Statement (15) STATEMENTS OF PARTNERS CA (14)Cash Flows (15)NOTE 4 INCOME TAXES (9)! NOTE 5 OIL AND GAS PRODUC (28)! NOTE 5 OIL AND GAS PRODUC (29)! 16 PAGE 534 NOTE 6 RELATED PAR! 16 PAGE 534 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (27) NOTE 7 OIL AND GAS INFORM (28) NOTE 7 OIL AND GAS INFORM (29)!18 PAGE 536 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (9)Beneficial Ownership (9)PARKER PARSLEY 86C LTDSELECTED FINANCIAL DATA (14) SUPPLEMENTAL INFORMATION (15)Balance Sheet (15)Income Statement (16) STATEMENTS OF PARTNERS CA (15)Cash Flows (16) 8 PAGE 556 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (30)! NOTE 5 OIL AND GAS PRODUC (31)! NOTE 6 RELATED PARTY TRANS (6)! NOTE 6 RELATED PARTY TRANS (7) NOTE 7 OIL AND GAS INFORM (30) NOTE 7 OIL AND GAS INFORM (31) NOTE 7 OIL AND GAS INFORM (32)! 11 PAGE 559 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (15) SUPPLEMENTAL INFORMATION (16)Balance Sheet (16)Income Statement (17) STATEMENTS OF PARTNERS CA (16)Cash Flows (17)NOTE 4 INCOME TAXES (10)! NOTE 5 OIL AND GAS PRODUC (32)! NOTE 5 OIL AND GAS PRODUC (33)! 9 PAGE 576 NOTE 6 RELATED PART! 9 PAGE 576 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (33) NOTE 7 OIL AND GAS INFORM (34) NOTE 7 OIL AND GAS INFORM (35)!11 PAGE 578 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (16) SUPPLEMENTAL INFORMATION (17) ITEM 6 SELECTED FINANCIAL (10)!8 PAGE 594 ITEM 8 FINANCIAL STABalance Sheet (17)Income Statement (18) STATEMENTS OF PARTNERS CA (17)Cash Flows (18)NOTE 4 INCOME TAXES (11)! NOTE 5 OIL AND GAS PRODUC (34)! NOTE 5 OIL AND GAS PRODUC (35)! 17 PAGE 603 NOTE 6 RELATED PAR! 17 PAGE 603 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (36) NOTE 7 OIL AND GAS INFORM (37) NOTE 7 OIL AND GAS INFORM (38)! 19 PAGE 605 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (10)Beneficial Ownership (10)PARKER PARSLEY 87A LTDSELECTED FINANCIAL DATA (17) SUPPLEMENTAL INFORMATION (18)Balance Sheet (18)Income Statement (19) STATEMENTS OF PARTNERS CA (18)Cash Flows (19) 8 PAGE 625 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (36)! NOTE 5 OIL AND GAS PRODUC (37)! 9 PAGE 626 NOTE 6 RELATED PART! 9 PAGE 626 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (39) NOTE 7 OIL AND GAS INFORM (40) NOTE 7 OIL AND GAS INFORM (41)! 11 PAGE 628 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (18) SUPPLEMENTAL INFORMATION (19) ITEM 6 SELECTED FINANCIAL (11)INDEX TO FINANCIAL STATEM (8)Balance Sheet (19)Income Statement (20) STATEMENTS OF PARTNERS CA (19)Cash Flows (20)NOTE 4 INCOME TAXES (12)! NOTE 5 OIL AND GAS PRODUC (38)! NOTE 5 OIL AND GAS PRODUC (39)! 17 PAGE 653 NOTE 6 RELATED PAR! 17 PAGE 653 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (42) NOTE 7 OIL AND GAS INFORM (43) NOTE 7 OIL AND GAS INFORM (44)! 19 PAGE 655 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (11)Beneficial Ownership (11)PARKER PARSLEY 87B LTDINDEX TO EXHIBITS (9)SELECTED FINANCIAL DATA (19) SUPPLEMENTAL INFORMATION (20) ITEM 6 SELECTED FINANCIAL (12)INDEX TO FINANCIAL STATEM (9)Balance Sheet (20)Income Statement (21) STATEMENTS OF PARTNERS CA (20)Cash Flows (21)!16 PAGE 683 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (40)! NOTE 5 OIL AND GAS PRODUC (41)! NOTE 6 RELATED PARTY TRANS (8)! NOTE 6 RELATED PARTY TRANS (9) NOTE 7 OIL AND GAS INFORM (45) NOTE 7 OIL AND GAS INFORM (46) NOTE 7 OIL AND GAS INFORM (47)!19 PAGE 686 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (12)Beneficial Ownership (12)PROPERTIES 87A LTDINDEX TO EXHIBITS (10)SELECTED FINANCIAL DATA (20) SUPPLEMENTAL INFORMATION (21) ITEM 6 SELECTED FINANCIAL (13)INDEX TO FINANCIAL STATE (10)Balance Sheet (21)Income Statement (22) STATEMENTS OF PARTNERS CA (21)Cash Flows (22)!16 PAGE 714 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (42)! NOTE 5 OIL AND GAS PRODUC (43)! 17 PAGE 715 NOTE 6 RELATED PAR! 17 PAGE 715 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (48) NOTE 7 OIL AND GAS INFORM (49) NOTE 7 OIL AND GAS INFORM (50)! 19 PAGE 717 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (13)Beneficial Ownership (13)PROPERTIES 87B LTDINDEX TO EXHIBITS (11)SELECTED FINANCIAL DATA (21) SUPPLEMENTAL INFORMATION (22)Balance Sheet (22)Income Statement (23) STATEMENTS OF PARTNERS CA (22)Cash Flows (23) 8 PAGE 737 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (44)! NOTE 5 OIL AND GAS PRODUC (45)! 9 PAGE 738 NOTE 6 RELATED PART! 9 PAGE 738 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (51) NOTE 7 OIL AND GAS INFORM (52) NOTE 7 OIL AND GAS INFORM (53)! 11 PAGE 740 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (22) SUPPLEMENTAL INFORMATION (23)Balance Sheet (23)Income Statement (24) STATEMENTS OF PARTNERS CA (23)Cash Flows (24) 8 PAGE 756 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (46)! NOTE 5 OIL AND GAS PRODUC (47)! 9 PAGE 757 NOTE 6 RELATED PART! 9 PAGE 757 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (54) NOTE 7 OIL AND GAS INFORM (55) NOTE 7 OIL AND GAS INFORM (56)! 11 PAGE 759 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (23)!31 2000 1 PAGE 766 PARKER PARSLPARKER PARSLEY 88A LP ITEM 6 SELECTED FINANCIAL (14)INDEX TO FINANCIAL STATE (11)Balance Sheet (24)Income Statement (25) STATEMENTS OF PARTNERS CA (24)Cash Flows (25)NOTE 4 INCOME TAXES (13)! NOTE 5 OIL AND GAS PRODUC (48)! NOTE 5 OIL AND GAS PRODUC (49)! 16 PAGE 783 NOTE 6 RELATED PAR! 16 PAGE 783 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (57) NOTE 7 OIL AND GAS INFORM (58) NOTE 7 OIL AND GAS INFORM (59)! 18 PAGE 785 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (14)Beneficial Ownership (14)PARKER PARSLEY 88A LP (1)INDEX TO EXHIBITS (12)SELECTED FINANCIAL DATA (24) SUPPLEMENTAL INFORMATION (24)Balance Sheet (25)Income Statement (26) STATEMENTS OF PARTNERS CA (25)Cash Flows (26) 8 PAGE 805 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (50)! NOTE 5 OIL AND GAS PRODUC (51)! 9 PAGE 806 NOTE 6 RELATED PART! 9 PAGE 806 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (60) NOTE 7 OIL AND GAS INFORM (61) NOTE 7 OIL AND GAS INFORM (62)! 11 PAGE 808 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (25)!31 2000 1 PAGE 815 PARKER PARSLPARKER PARSLEY 88B LP ITEM 6 SELECTED FINANCIAL (15)INDEX TO FINANCIAL STATE (12)Balance Sheet (26)Income Statement (27) STATEMENTS OF PARTNERS CA (26)Cash Flows (27)!16 PAGE 832 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (52)! NOTE 5 OIL AND GAS PRODUC (53)! 17 PAGE 833 NOTE 6 RELATED PAR! 17 PAGE 833 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (63) NOTE 7 OIL AND GAS INFORM (64) NOTE 7 OIL AND GAS INFORM (65)! 19 PAGE 835 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (15)Beneficial Ownership (15)PARKER PARSLEY 88B LP (1)INDEX TO EXHIBITS (13)SELECTED FINANCIAL DATA (26) SUPPLEMENTAL INFORMATION (25)Balance Sheet (27)Income Statement (28) STATEMENTS OF PARTNERS CA (27)Cash Flows (28) 8 PAGE 855 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (54)! NOTE 5 OIL AND GAS PRODUC (55)! 9 PAGE 856 NOTE 6 RELATED PART! 9 PAGE 856 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (66) NOTE 7 OIL AND GAS INFORM (67) NOTE 7 OIL AND GAS INFORM (68)! 11 PAGE 858 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (27)!31 2000 1 PAGE 865 PARKER PARSLBalance Sheet (28)Income Statement (29) STATEMENTS OF PARTNERS CA (28)Cash Flows (29) 8 PAGE 874 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (56)! NOTE 5 OIL AND GAS PRODUC (57)! 9 PAGE 875 NOTE 6 RELATED PART! 9 PAGE 875 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (69) NOTE 7 OIL AND GAS INFORM (70) NOTE 7 OIL AND GAS INFORM (71)! 11 PAGE 877 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (28) SUPPLEMENTAL INFORMATION (26)!PARKER PARSLEY PRODUCING PROPER ITEM 6 SELECTED FINANCIAL (16)INDEX TO FINANCIAL STATE (13)Balance Sheet (29)Income Statement (30) STATEMENTS OF PARTNERS CA (29)Cash Flows (30)NOTE 4 INCOME TAXES (14)! NOTE 5 OIL AND GAS PRODUC (58)! NOTE 5 OIL AND GAS PRODUC (59)! 16 PAGE 901 NOTE 6 RELATED PAR! 16 PAGE 901 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (72) NOTE 7 OIL AND GAS INFORM (73)!18 PAGE 903 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (16)Beneficial Ownership (16)PROPERTIES 88A LPINDEX TO EXHIBITS (14)SELECTED FINANCIAL DATA (29) SUPPLEMENTAL INFORMATION (27)Balance Sheet (30)Income Statement (31) STATEMENTS OF PARTNERS CA (30)Cash Flows (31)NOTE 4 INCOME TAXES (15)! NOTE 5 OIL AND GAS PRODUC (60)! NOTE 5 OIL AND GAS PRODUC (61)! 9 PAGE 924 NOTE 6 RELATED PART! 9 PAGE 924 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (74) NOTE 7 OIL AND GAS INFORM (75) NOTE 7 OIL AND GAS INFORM (76)! 11 PAGE 926 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (30) SUPPLEMENTAL INFORMATION (28)Balance Sheet (31)Income Statement (32) STATEMENTS OF PARTNERS CA (31)Cash Flows (32)NOTE 4 INCOME TAXES (16)! NOTE 5 OIL AND GAS PRODUC (62)! NOTE 5 OIL AND GAS PRODUC (63)! 9 PAGE 943 NOTE 6 RELATED PART! 9 PAGE 943 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (77) NOTE 7 OIL AND GAS INFORM (78) NOTE 7 OIL AND GAS INFORM (79)!11 PAGE 945 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (31)!31 2000 1 PAGE 952 PARKER PARSLPARKER PARSLEY 89A LP ITEM 6 SELECTED FINANCIAL (17)INDEX TO FINANCIAL STATE (14)Balance Sheet (32)Income Statement (33) STATEMENTS OF PARTNERS CA (32)Cash Flows (33)NOTE 4 INCOME TAXES (17)! NOTE 5 OIL AND GAS PRODUC (64)! NOTE 5 OIL AND GAS PRODUC (65)! 16 PAGE 969 NOTE 6 RELATED PAR! 16 PAGE 969 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (80) NOTE 7 OIL AND GAS INFORM (81) NOTE 7 OIL AND GAS INFORM (82) NOTE 7 OIL AND GAS INFORM (83)! 18 PAGE 971 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (17)Beneficial Ownership (17)PARKER PARSLEY 89A LP (1)INDEX TO EXHIBITS (15)SELECTED FINANCIAL DATA (32) SUPPLEMENTAL INFORMATION (29)Balance Sheet (33)Income Statement (34) STATEMENTS OF PARTNERS CA (33)Cash Flows (34) 8 PAGE 991 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (66)! NOTE 5 OIL AND GAS PRODUC (67)! 9 PAGE 992 NOTE 6 RELATED PART! 9 PAGE 992 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (84) NOTE 7 OIL AND GAS INFORM (85) NOTE 7 OIL AND GAS INFORM (86)! 11 PAGE 994 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (33)!31 2000 1 PAGE 1001 PARKER PARSBalance Sheet (34)Income Statement (35) STATEMENTS OF PARTNERS CA (34)Cash Flows (35)!8 PAGE 1010 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (68)! NOTE 5 OIL AND GAS PRODUC (69)! 9 PAGE 1011 NOTE 6 RELATED PAR! 9 PAGE 1011 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (87) NOTE 7 OIL AND GAS INFORM (88) NOTE 7 OIL AND GAS INFORM (89)!11 PAGE 1013 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (34) SUPPLEMENTAL INFORMATION (30)Balance Sheet (35)Income Statement (36) STATEMENTS OF PARTNERS CA (35)Cash Flows (36)!8 PAGE 1029 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (70)! NOTE 5 OIL AND GAS PRODUC (71)! 9 PAGE 1030 NOTE 6 RELATED PAR! 9 PAGE 1030 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (90) NOTE 7 OIL AND GAS INFORM (91) NOTE 7 OIL AND GAS INFORM (92)! 11 PAGE 1032 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (35) SUPPLEMENTAL INFORMATION (31)Balance Sheet (36)Income Statement (37) STATEMENTS OF PARTNERS CA (36)Cash Flows (37)!8 PAGE 1048 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (72)! NOTE 5 OIL AND GAS PRODUC (73)! 9 PAGE 1049 NOTE 6 RELATED PAR! 9 PAGE 1049 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (93) NOTE 7 OIL AND GAS INFORM (94) NOTE 7 OIL AND GAS INFORM (95)! 11 PAGE 1051 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (36)!31 2000 1 PAGE 1058 PARKER PARSPARKER PARSLEY 90A LP ITEM 6 SELECTED FINANCIAL (18)INDEX TO FINANCIAL STATE (15)Balance Sheet (37)Income Statement (38) STATEMENTS OF PARTNERS CA (37)Cash Flows (38)!15 PAGE 1074 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (74)! NOTE 5 OIL AND GAS PRODUC (75)! NOTE 6 RELATED PARTY TRAN (10)! NOTE 6 RELATED PARTY TRAN (11) NOTE 7 OIL AND GAS INFORM (96) NOTE 7 OIL AND GAS INFORM (97)! 18 PAGE 1077 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (18)Beneficial Ownership (18)PARKER PARSLEY 90A LP (1)INDEX TO EXHIBITS (16)SELECTED FINANCIAL DATA (37) SUPPLEMENTAL INFORMATION (32)PARKER PARSLEY 90B CONV LP ITEM 6 SELECTED FINANCIAL (19)INDEX TO FINANCIAL STATE (16)Balance Sheet (38)Income Statement (39) STATEMENTS OF PARTNERS CA (38)Cash Flows (39)!16 PAGE 1105 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (76)! NOTE 5 OIL AND GAS PRODUC (77)! NOTE 6 RELATED PARTY TRAN (12)! NOTE 6 RELATED PARTY TRAN (13) NOTE 7 OIL AND GAS INFORM (98) NOTE 7 OIL AND GAS INFORM (99) NOTE 7 OIL AND GAS INFOR (100)! 19 PAGE 1108 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (19)Beneficial Ownership (19) PARKER PARSLEY 90B CONV LP (1)INDEX TO EXHIBITS (17)SELECTED FINANCIAL DATA (38)!31 2000 1 PAGE 1119 PARKER PARSPARKER PARSLEY 90B LP ITEM 6 SELECTED FINANCIAL (20)INDEX TO FINANCIAL STATE (17)Balance Sheet (39)Income Statement (40) STATEMENTS OF PARTNERS CA (39)Cash Flows (40)!16 PAGE 1136 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (78)! NOTE 5 OIL AND GAS PRODUC (79)! NOTE 6 RELATED PARTY TRAN (14)! NOTE 6 RELATED PARTY TRAN (15) NOTE 7 OIL AND GAS INFOR (101) NOTE 7 OIL AND GAS INFOR (102) NOTE 7 OIL AND GAS INFOR (103)! 19 PAGE 1139 NOTE 8 MAJOR CUS!ITEM 10 DIRECTORS AND EXEC (20)Beneficial Ownership (20)PARKER PARSLEY 90B LP (1)INDEX TO EXHIBITS (18)SELECTED FINANCIAL DATA (39) SUPPLEMENTAL INFORMATION (33)PARKER PARSLEY 90C CONV LP ITEM 6 SELECTED FINANCIAL (21)INDEX TO FINANCIAL STATE (18)Balance Sheet (40)Income Statement (41) STATEMENTS OF PARTNERS CA (40)Cash Flows (41)!15 PAGE 1166 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (80)! NOTE 5 OIL AND GAS PRODUC (81)! NOTE 6 RELATED PARTY TRAN (16)! NOTE 6 RELATED PARTY TRAN (17) NOTE 7 OIL AND GAS INFOR (104) NOTE 7 OIL AND GAS INFOR (105) NOTE 7 OIL AND GAS INFOR (106)! 18 PAGE 1169 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (21)Beneficial Ownership (21) PARKER PARSLEY 90C CONV LP (1)INDEX TO EXHIBITS (19)SELECTED FINANCIAL DATA (40)!31 2000 1 PAGE 1180 PARKER PARSPARKER PARSLEY 90C LP ITEM 6 SELECTED FINANCIAL (22)INDEX TO FINANCIAL STATE (19)Balance Sheet (41)Income Statement (42) STATEMENTS OF PARTNERS CA (41)Cash Flows (42)!15 PAGE 1196 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (82)! NOTE 5 OIL AND GAS PRODUC (83)! NOTE 6 RELATED PARTY TRAN (18)! NOTE 6 RELATED PARTY TRAN (19) NOTE 7 OIL AND GAS INFOR (107) NOTE 7 OIL AND GAS INFOR (108) NOTE 7 OIL AND GAS INFOR (109)! 18 PAGE 1199 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (22)Beneficial Ownership (22)PARKER PARSLEY 90C LP (1)INDEX TO EXHIBITS (20)SELECTED FINANCIAL DATA (41) SUPPLEMENTAL INFORMATION (34)Balance Sheet (42)Income Statement (43) STATEMENTS OF PARTNERS CA (42)Cash Flows (43)!8 PAGE 1219 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (84)! NOTE 5 OIL AND GAS PRODUC (85)! 9 PAGE 1220 NOTE 6 RELATED PAR! 9 PAGE 1220 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (110) NOTE 7 OIL AND GAS INFOR (111) NOTE 7 OIL AND GAS INFOR (112)! 11 PAGE 1222 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (42) SUPPLEMENTAL INFORMATION (35)Balance Sheet (43)Income Statement (44) STATEMENTS OF PARTNERS CA (43)Cash Flows (44)!8 PAGE 1238 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (86)! NOTE 5 OIL AND GAS PRODUC (87)! 9 PAGE 1239 NOTE 6 RELATED PAR! 9 PAGE 1239 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (113) NOTE 7 OIL AND GAS INFOR (114) NOTE 7 OIL AND GAS INFOR (115)! 11 PAGE 1241 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (43)!31 2000 1 PAGE 1248 PARKER PARSPARKER PARSLEY 91A LP ITEM 6 SELECTED FINANCIAL (23)INDEX TO FINANCIAL STATE (20)Balance Sheet (44)Income Statement (45) STATEMENTS OF PARTNERS CA (44)Cash Flows (45)!15 PAGE 1264 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (88)! NOTE 5 OIL AND GAS PRODUC (89)! NOTE 6 RELATED PARTY TRAN (20)! NOTE 6 RELATED PARTY TRAN (21) NOTE 7 OIL AND GAS INFOR (116) NOTE 7 OIL AND GAS INFOR (117) NOTE 7 OIL AND GAS INFOR (118)! 18 PAGE 1267 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (23)Beneficial Ownership (23)PARKER PARSLEY 91A LP (1)INDEX TO EXHIBITS (21)SELECTED FINANCIAL DATA (44)!31 2000 1 PAGE 1278 PARKER PARSPARKER PARSLEY 91B LP ITEM 6 SELECTED FINANCIAL (24)INDEX TO FINANCIAL STATE (21)Balance Sheet (45)Income Statement (46) STATEMENTS OF PARTNERS CA (45)Cash Flows (46)!15 PAGE 1294 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (90)! NOTE 5 OIL AND GAS PRODUC (91)! NOTE 6 RELATED PARTY TRAN (22)! NOTE 6 RELATED PARTY TRAN (23) NOTE 7 OIL AND GAS INFOR (119) NOTE 7 OIL AND GAS INFOR (120) NOTE 7 OIL AND GAS INFOR (121)! 18 PAGE 1297 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (24)Beneficial Ownership (24)PARKER PARSLEY 91B LP (1)INDEX TO EXHIBITS (22)SELECTED FINANCIAL DATA (45)POWER OF ATTORNEYPOWER OF ATTORNEY (1)POWER OF ATTORNEY (2)POWER OF ATTORNEY (3)POWER OF ATTORNEY (4)POWER OF ATTORNEY (5)POWER OF ATTORNEY (6)POWER OF ATTORNEY (7)!2001 THE BOARD OF DIRECTORS REC!2001 THE BOARD OF DIRECTORS (1)!2001 THE BOARD OF DIRECTORS (2)PAGE 2U } W}      $PIONEER NATURAL RESOURCES CO S-4 04/17/20013+-49- 59 PAYMENT OF EXPENSES AND FEES %  Filing fee with SEC~ R@  Legal fees~ \!  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SECURITIES AND EXC!CALCULATION OF REGISTRATION FEETO BE HELD ON 2001TABLE OF CONTENTSPAGE 7 LIST OF APPENDICES!LIMITED PARTNER INVESTMENT REPA!LIMITED PARTNER INVESTMENT (1) 5 PAGE 15 NYMEX FUTURES PRICES!EXAMPLE CALCULATION OF MERGER VIncome StatementIncome Statement (1)AT DECEMBER 31 2000!15 PAGE 25 COMPARATIVE PER SHAR!25 PAGE 35 REASONS FOR THE MERGFAIRNESS OPINIONFAIRNESS OPINION (1)!LEGAL OPINION FOR LIMITED PARTN!LEGAL OPINION FOR LIMITED P (1)!NONMANAGING GENERAL PARTNERS OF!49 PAGE 59 PAYMENT OF EXPENSES !60 PAGE 70 OWNERSHIP OF PARTNER PIONEER PIONEER USATHE DRILLING PARTNERSHIPSTHE DRILLING PARTNERSHIPS (1)THE INCOME PARTNERSHIPS INTERESTSINTERESTS (1)INTERESTS (2)INTERESTS (3)INTERESTS (4)INTERESTS (5)!WHERE YOU CAN FIND MORE INFORMAAS OF DECEMBER 31 2000YEAR ENDED DECEMBER 31 2000!QUANTITIES OF OIL AND GAS RESER!STANDARDIZED MEASURE OF DISCOUN CASH FLOWSAS OF MARCH 31 2001AS OF MARCH 31 2001 (1)AS OF MARCH 31 2001 (2)AS OF MARCH 31 2001 (3)AS OF MARCH 31 2001 (4)AS OF MARCH 31 2001 (5)!FROM INCEPTION THROUGH MARCH 31!ANNUAL REPURCHASE PRICES AND AGOF EACH PARTNERSHIP!FOR THE THREE MONTHS ENDED MARCAS OF DECEMBER 31 2000 (1)AS OF MARCH 31 2001 (6)!THE YEARS ENDED DECEMBER 31 200AS OF DECEMBER 31 2000 (2)DECEMBER 31 2000 AND 1999EFFECTIVE DECEMBER 31 2000 EFFECTIVE DECEMBER 31 2000 (1) RECITALS RECITALS (1) SUPPLEMENTAL INFORMATION TABLEBalance SheetIncome Statement (2) STATEMENTS OF PARTNERS CAPITALCash Flows (1)NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCING A! NOTE 5 OIL AND GAS PRODUCI (1)! NOTE 6 RELATED PARTY TRANSACTI! NOTE 6 RELATED PARTY TRANS (1)! NOTE 7 OIL AND GAS INFORMATION! NOTE 7 OIL AND GAS INFORMA (1)! NOTE 7 OIL AND GAS INFORMA (2)!11 PAGE 163 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA SUPPLEMENTAL INFORMATION T (1)Balance Sheet (1)Income Statement (3) STATEMENTS OF PARTNERS CAP (1)Cash Flows (2)NOTE 4 INCOME TAXES (1)! NOTE 5 OIL AND GAS PRODUCI (2)! NOTE 5 OIL AND GAS PRODUCI (3)! 9 PAGE 180 NOTE 6 RELATED PAR! 9 PAGE 180 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORMA (3)! NOTE 7 OIL AND GAS INFORMA (4)! NOTE 7 OIL AND GAS INFORMA (5)!11 PAGE 182 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (1) SUPPLEMENTAL INFORMATION T (2) ITEM 6 SELECTED FINANCIAL DATAINDEX TO FINANCIAL STATEMENTSBalance Sheet (2)Income Statement (4) STATEMENTS OF PARTNERS CAP (2)Cash Flows (3)!15 PAGE 205 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCI (4)! NOTE 5 OIL AND GAS PRODUCI (5)! NOTE 6 RELATED PARTY TRANS (2)! NOTE 6 RELATED PARTY TRANS (3)! NOTE 7 OIL AND GAS INFORMA (6)! NOTE 7 OIL AND GAS INFORMA (7)! NOTE 7 OIL AND GAS INFORMA (8)! NOTE 7 OIL AND GAS INFORMA (9)! NOTE 7 OIL AND GAS INFORM (10)! 18 PAGE 208 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECUTIVEBeneficial OwnershipPARKER PARSLEY 82I LTDINDEX TO EXHIBITSSELECTED FINANCIAL DATA (2) SUPPLEMENTAL INFORMATION T (3) ITEM 6 SELECTED FINANCIAL (1)INDEX TO FINANCIAL STATEM (1)Balance Sheet (3)Income Statement (5) STATEMENTS OF PARTNERS CAP (3)Cash Flows (4)NOTE 4 INCOME TAXES (2)! NOTE 5 OIL AND GAS PRODUCI (6)! NOTE 5 OIL AND GAS PRODUCI (7)! 16 PAGE 236 NOTE 6 RELATED PAR! 16 PAGE 236 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (11)! NOTE 7 OIL AND GAS INFORM (12)! NOTE 7 OIL AND GAS INFORM (13)!18 PAGE 238 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (1)Beneficial Ownership (1)PARKER PARSLEY 82II LTDINDEX TO EXHIBITS (1)SELECTED FINANCIAL DATA (3) SUPPLEMENTAL INFORMATION T (4)Balance Sheet (4)Income Statement (6) STATEMENTS OF PARTNERS CAP (4)Cash Flows (5)NOTE 4 INCOME TAXES (3)! NOTE 5 OIL AND GAS PRODUCI (8)! NOTE 5 OIL AND GAS PRODUCI (9)! 9 PAGE 259 NOTE 6 RELATED PART! 9 PAGE 259 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (14)! NOTE 7 OIL AND GAS INFORM (15)! NOTE 7 OIL AND GAS INFORM (16)!11 PAGE 261 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (4) SUPPLEMENTAL INFORMATION T (5)PARKER PARSLEY 83A LTD ITEM 6 SELECTED FINANCIAL (2)INDEX TO FINANCIAL STATEM (2)Balance Sheet (5)Income Statement (7) STATEMENTS OF PARTNERS CAP (5)Cash Flows (6)NOTE 4 INCOME TAXES (4)! NOTE 5 OIL AND GAS PRODUC (10)! NOTE 5 OIL AND GAS PRODUC (11)! 16 PAGE 285 NOTE 6 RELATED PAR! 16 PAGE 285 NOTE 6 RELATED (1)!NOTE 7 OIL AND GAS INFORMATION  NOTE 7 OIL AND GAS INFORMA (1) NOTE 7 OIL AND GAS INFORMA (2)! 18 PAGE 287 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECU (2)Beneficial Ownership (2)PARKER PARSLEY 83A LTD (1)INDEX TO EXHIBITS (2)SELECTED FINANCIAL DATA (5) SUPPLEMENTAL INFORMATION T (6)PARKER PARSLEY 83B LTD ITEM 6 SELECTED FINANCIAL (3)INDEX TO FINANCIAL STATEM (3)Balance Sheet (6)Income Statement (8) STATEMENTS OF PARTNERS CAP (6)Cash Flows (7)NOTE 4 INCOME TAXES (5)! NOTE 5 OIL AND GAS PRODUC (12)! NOTE 5 OIL AND GAS PRODUC (13)! 16 PAGE 315 NOTE 6 RELATED PAR! 16 PAGE 315 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (3) NOTE 7 OIL AND GAS INFORMA (4) NOTE 7 OIL AND GAS INFORMA (5)!18 PAGE 317 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (3)Beneficial Ownership (3)PARKER PARSLEY 83B LTD (1)INDEX TO EXHIBITS (3)SELECTED FINANCIAL DATA (6) SUPPLEMENTAL INFORMATION T (7)PARKER PARSLEY 84A LTD ITEM 6 SELECTED FINANCIAL (4)INDEX TO FINANCIAL STATEM (4)Balance Sheet (7)Income Statement (9) STATEMENTS OF PARTNERS CAP (7)Cash Flows (8)!15 PAGE 344 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (14)! NOTE 5 OIL AND GAS PRODUC (15)! 16 PAGE 345 NOTE 6 RELATED PAR! 16 PAGE 345 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (6) NOTE 7 OIL AND GAS INFORMA (7) NOTE 7 OIL AND GAS INFORMA (8)!18 PAGE 347 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (4)Beneficial Ownership (4)PARKER PARSLEY 84A LTD (1)INDEX TO EXHIBITS (4)SELECTED FINANCIAL DATA (7) SUPPLEMENTAL INFORMATION T (8)PARKER PARSLEY 85A LTD ITEM 6 SELECTED FINANCIAL (5)INDEX TO FINANCIAL STATEM (5)Balance Sheet (8)Income Statement (10) STATEMENTS OF PARTNERS CAP (8)Cash Flows (9)NOTE 4 INCOME TAXES (6)! NOTE 5 OIL AND GAS PRODUC (16)! NOTE 5 OIL AND GAS PRODUC (17)! 16 PAGE 375 NOTE 6 RELATED PAR! 16 PAGE 375 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (9) NOTE 7 OIL AND GAS INFORM (10) NOTE 7 OIL AND GAS INFORM (11)!18 PAGE 377 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (5)Beneficial Ownership (5)PARKER PARSLEY 85A LTD (1)INDEX TO EXHIBITS (5)SELECTED FINANCIAL DATA (8) SUPPLEMENTAL INFORMATION T (9)PARKER PARSLEY 85B LTD ITEM 6 SELECTED FINANCIAL (6)!7 PAGE 396 ITEM 8 FINANCIAL STABalance Sheet (9) STATEMENTS OF PARTNERS CAP (9)Cash Flows (10)!15 PAGE 404 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (18)! NOTE 5 OIL AND GAS PRODUC (19)! 16 PAGE 405 NOTE 6 RELATED PAR! 16 PAGE 405 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (12) NOTE 7 OIL AND GAS INFORM (13) NOTE 7 OIL AND GAS INFORM (14)!18 PAGE 407 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (6)Beneficial Ownership (6)PARKER PARSLEY 85B LTD (1)INDEX TO EXHIBITS (6)SELECTED FINANCIAL DATA (9) SUPPLEMENTAL INFORMATION (10)Balance Sheet (10)Income Statement (11) STATEMENTS OF PARTNERS CA (10)Cash Flows (11)NOTE 4 INCOME TAXES (7)! NOTE 5 OIL AND GAS PRODUC (20)! NOTE 5 OIL AND GAS PRODUC (21)! 9 PAGE 428 NOTE 6 RELATED PART! 9 PAGE 428 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (15) NOTE 7 OIL AND GAS INFORM (16) NOTE 7 OIL AND GAS INFORM (17)! 11 PAGE 430 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (10) SUPPLEMENTAL INFORMATION (11)Balance Sheet (11)Income Statement (12) STATEMENTS OF PARTNERS CA (11)Cash Flows (12) 8 PAGE 446 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (22)! NOTE 5 OIL AND GAS PRODUC (23)! 9 PAGE 447 NOTE 6 RELATED PART! 9 PAGE 447 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (18) NOTE 7 OIL AND GAS INFORM (19) NOTE 7 OIL AND GAS INFORM (20)! 11 PAGE 449 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (11) SUPPLEMENTAL INFORMATION (12)PARKER PARSLEY 86A LTD ITEM 6 SELECTED FINANCIAL (7)INDEX TO FINANCIAL STATEM (6)Balance Sheet (12)Income Statement (13) STATEMENTS OF PARTNERS CA (12)Cash Flows (13)NOTE 4 INCOME TAXES (8)! NOTE 5 OIL AND GAS PRODUC (24)! NOTE 5 OIL AND GAS PRODUC (25)! 16 PAGE 473 NOTE 6 RELATED PAR! 16 PAGE 473 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (21) NOTE 7 OIL AND GAS INFORM (22) NOTE 7 OIL AND GAS INFORM (23)!18 PAGE 475 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (7)Beneficial Ownership (7)PARKER PARSLEY 86A LTD (1)INDEX TO EXHIBITS (7)SELECTED FINANCIAL DATA (12) SUPPLEMENTAL INFORMATION (13)PARKER PARSLEY 86B LTD ITEM 6 SELECTED FINANCIAL (8)INDEX TO FINANCIAL STATEM (7)Balance Sheet (13)Income Statement (14) STATEMENTS OF PARTNERS CA (13)Cash Flows (14)!16 PAGE 503 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (26)! NOTE 5 OIL AND GAS PRODUC (27)! NOTE 6 RELATED PARTY TRANS (4)! NOTE 6 RELATED PARTY TRANS (5) NOTE 7 OIL AND GAS INFORM (24) NOTE 7 OIL AND GAS INFORM (25) NOTE 7 OIL AND GAS INFORM (26)!19 PAGE 506 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (8)Beneficial Ownership (8)PARKER PARSLEY 86B LTD (1)INDEX TO EXHIBITS (8)SELECTED FINANCIAL DATA (13) SUPPLEMENTAL INFORMATION (14) ITEM 6 SELECTED FINANCIAL (9)!7 PAGE 525 ITEM 8 FINANCIAL STABalance Sheet (14)Income Statement (15) STATEMENTS OF PARTNERS CA (14)Cash Flows (15)NOTE 4 INCOME TAXES (9)! NOTE 5 OIL AND GAS PRODUC (28)! NOTE 5 OIL AND GAS PRODUC (29)! 16 PAGE 534 NOTE 6 RELATED PAR! 16 PAGE 534 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (27) NOTE 7 OIL AND GAS INFORM (28) NOTE 7 OIL AND GAS INFORM (29)!18 PAGE 536 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (9)Beneficial Ownership (9)PARKER PARSLEY 86C LTDSELECTED FINANCIAL DATA (14) SUPPLEMENTAL INFORMATION (15)Balance Sheet (15)Income Statement (16) STATEMENTS OF PARTNERS CA (15)Cash Flows (16) 8 PAGE 556 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (30)! NOTE 5 OIL AND GAS PRODUC (31)! NOTE 6 RELATED PARTY TRANS (6)! NOTE 6 RELATED PARTY TRANS (7) NOTE 7 OIL AND GAS INFORM (30) NOTE 7 OIL AND GAS INFORM (31) NOTE 7 OIL AND GAS INFORM (32)! 11 PAGE 559 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (15) SUPPLEMENTAL INFORMATION (16)Balance Sheet (16)Income Statement (17) STATEMENTS OF PARTNERS CA (16)Cash Flows (17)NOTE 4 INCOME TAXES (10)! NOTE 5 OIL AND GAS PRODUC (32)! NOTE 5 OIL AND GAS PRODUC (33)! 9 PAGE 576 NOTE 6 RELATED PART! 9 PAGE 576 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (33) NOTE 7 OIL AND GAS INFORM (34) NOTE 7 OIL AND GAS INFORM (35)!11 PAGE 578 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (16) SUPPLEMENTAL INFORMATION (17) ITEM 6 SELECTED FINANCIAL (10)!8 PAGE 594 ITEM 8 FINANCIAL STABalance Sheet (17)Income Statement (18) STATEMENTS OF PARTNERS CA (17)Cash Flows (18)NOTE 4 INCOME TAXES (11)! NOTE 5 OIL AND GAS PRODUC (34)! NOTE 5 OIL AND GAS PRODUC (35)! 17 PAGE 603 NOTE 6 RELATED PAR! 17 PAGE 603 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (36) NOTE 7 OIL AND GAS INFORM (37) NOTE 7 OIL AND GAS INFORM (38)! 19 PAGE 605 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (10)Beneficial Ownership (10)PARKER PARSLEY 87A LTDSELECTED FINANCIAL DATA (17) SUPPLEMENTAL INFORMATION (18)Balance Sheet (18)Income Statement (19) STATEMENTS OF PARTNERS CA (18)Cash Flows (19) 8 PAGE 625 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (36)! NOTE 5 OIL AND GAS PRODUC (37)! 9 PAGE 626 NOTE 6 RELATED PART! 9 PAGE 626 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (39) NOTE 7 OIL AND GAS INFORM (40) NOTE 7 OIL AND GAS INFORM (41)! 11 PAGE 628 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (18) SUPPLEMENTAL INFORMATION (19) ITEM 6 SELECTED FINANCIAL (11)INDEX TO FINANCIAL STATEM (8)Balance Sheet (19)Income Statement (20) STATEMENTS OF PARTNERS CA (19)Cash Flows (20)NOTE 4 INCOME TAXES (12)! NOTE 5 OIL AND GAS PRODUC (38)! NOTE 5 OIL AND GAS PRODUC (39)! 17 PAGE 653 NOTE 6 RELATED PAR! 17 PAGE 653 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (42) NOTE 7 OIL AND GAS INFORM (43) NOTE 7 OIL AND GAS INFORM (44)! 19 PAGE 655 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (11)Beneficial Ownership (11)PARKER PARSLEY 87B LTDINDEX TO EXHIBITS (9)SELECTED FINANCIAL DATA (19) SUPPLEMENTAL INFORMATION (20) ITEM 6 SELECTED FINANCIAL (12)INDEX TO FINANCIAL STATEM (9)Balance Sheet (20)Income Statement (21) STATEMENTS OF PARTNERS CA (20)Cash Flows (21)!16 PAGE 683 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (40)! NOTE 5 OIL AND GAS PRODUC (41)! NOTE 6 RELATED PARTY TRANS (8)! NOTE 6 RELATED PARTY TRANS (9) NOTE 7 OIL AND GAS INFORM (45) NOTE 7 OIL AND GAS INFORM (46) NOTE 7 OIL AND GAS INFORM (47)!19 PAGE 686 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (12)Beneficial Ownership (12)PROPERTIES 87A LTDINDEX TO EXHIBITS (10)SELECTED FINANCIAL DATA (20) SUPPLEMENTAL INFORMATION (21) ITEM 6 SELECTED FINANCIAL (13)INDEX TO FINANCIAL STATE (10)Balance Sheet (21)Income Statement (22) STATEMENTS OF PARTNERS CA (21)Cash Flows (22)!16 PAGE 714 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (42)! NOTE 5 OIL AND GAS PRODUC (43)! 17 PAGE 715 NOTE 6 RELATED PAR! 17 PAGE 715 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (48) NOTE 7 OIL AND GAS INFORM (49) NOTE 7 OIL AND GAS INFORM (50)! 19 PAGE 717 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (13)Beneficial Ownership (13)PROPERTIES 87B LTDINDEX TO EXHIBITS (11)SELECTED FINANCIAL DATA (21) SUPPLEMENTAL INFORMATION (22)Balance Sheet (22)Income Statement (23) STATEMENTS OF PARTNERS CA (22)Cash Flows (23) 8 PAGE 737 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (44)! NOTE 5 OIL AND GAS PRODUC (45)! 9 PAGE 738 NOTE 6 RELATED PART! 9 PAGE 738 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (51) NOTE 7 OIL AND GAS INFORM (52) NOTE 7 OIL AND GAS INFORM (53)! 11 PAGE 740 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (22) SUPPLEMENTAL INFORMATION (23)Balance Sheet (23)Income Statement (24) STATEMENTS OF PARTNERS CA (23)Cash Flows (24) 8 PAGE 756 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (46)! NOTE 5 OIL AND GAS PRODUC (47)! 9 PAGE 757 NOTE 6 RELATED PART! 9 PAGE 757 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (54) NOTE 7 OIL AND GAS INFORM (55) NOTE 7 OIL AND GAS INFORM (56)! 11 PAGE 759 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (23)!31 2000 1 PAGE 766 PARKER PARSLPARKER PARSLEY 88A LP ITEM 6 SELECTED FINANCIAL (14)INDEX TO FINANCIAL STATE (11)Balance Sheet (24)Income Statement (25) STATEMENTS OF PARTNERS CA (24)Cash Flows (25)NOTE 4 INCOME TAXES (13)! NOTE 5 OIL AND GAS PRODUC (48)! NOTE 5 OIL AND GAS PRODUC (49)! 16 PAGE 783 NOTE 6 RELATED PAR! 16 PAGE 783 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (57) NOTE 7 OIL AND GAS INFORM (58) NOTE 7 OIL AND GAS INFORM (59)! 18 PAGE 785 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (14)Beneficial Ownership (14)PARKER PARSLEY 88A LP (1)INDEX TO EXHIBITS (12)SELECTED FINANCIAL DATA (24) SUPPLEMENTAL INFORMATION (24)Balance Sheet (25)Income Statement (26) STATEMENTS OF PARTNERS CA (25)Cash Flows (26) 8 PAGE 805 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (50)! NOTE 5 OIL AND GAS PRODUC (51)! 9 PAGE 806 NOTE 6 RELATED PART! 9 PAGE 806 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (60) NOTE 7 OIL AND GAS INFORM (61) NOTE 7 OIL AND GAS INFORM (62)! 11 PAGE 808 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (25)!31 2000 1 PAGE 815 PARKER PARSLPARKER PARSLEY 88B LP ITEM 6 SELECTED FINANCIAL (15)INDEX TO FINANCIAL STATE (12)Balance Sheet (26)Income Statement (27) STATEMENTS OF PARTNERS CA (26)Cash Flows (27)!16 PAGE 832 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (52)! NOTE 5 OIL AND GAS PRODUC (53)! 17 PAGE 833 NOTE 6 RELATED PAR! 17 PAGE 833 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (63) NOTE 7 OIL AND GAS INFORM (64) NOTE 7 OIL AND GAS INFORM (65)! 19 PAGE 835 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (15)Beneficial Ownership (15)PARKER PARSLEY 88B LP (1)INDEX TO EXHIBITS (13)SELECTED FINANCIAL DATA (26) SUPPLEMENTAL INFORMATION (25)Balance Sheet (27)Income Statement (28) STATEMENTS OF PARTNERS CA (27)Cash Flows (28) 8 PAGE 855 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (54)! NOTE 5 OIL AND GAS PRODUC (55)! 9 PAGE 856 NOTE 6 RELATED PART! 9 PAGE 856 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (66) NOTE 7 OIL AND GAS INFORM (67) NOTE 7 OIL AND GAS INFORM (68)! 11 PAGE 858 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (27)!31 2000 1 PAGE 865 PARKER PARSLBalance Sheet (28)Income Statement (29) STATEMENTS OF PARTNERS CA (28)Cash Flows (29) 8 PAGE 874 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (56)! NOTE 5 OIL AND GAS PRODUC (57)! 9 PAGE 875 NOTE 6 RELATED PART! 9 PAGE 875 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (69) NOTE 7 OIL AND GAS INFORM (70) NOTE 7 OIL AND GAS INFORM (71)! 11 PAGE 877 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (28) SUPPLEMENTAL INFORMATION (26)!PARKER PARSLEY PRODUCING PROPER ITEM 6 SELECTED FINANCIAL (16)INDEX TO FINANCIAL STATE (13)Balance Sheet (29)Income Statement (30) STATEMENTS OF PARTNERS CA (29)Cash Flows (30)NOTE 4 INCOME TAXES (14)! NOTE 5 OIL AND GAS PRODUC (58)! NOTE 5 OIL AND GAS PRODUC (59)! 16 PAGE 901 NOTE 6 RELATED PAR! 16 PAGE 901 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (72) NOTE 7 OIL AND GAS INFORM (73)!18 PAGE 903 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (16)Beneficial Ownership (16)PROPERTIES 88A LPINDEX TO EXHIBITS (14)SELECTED FINANCIAL DATA (29) SUPPLEMENTAL INFORMATION (27)Balance Sheet (30)Income Statement (31) STATEMENTS OF PARTNERS CA (30)Cash Flows (31)NOTE 4 INCOME TAXES (15)! NOTE 5 OIL AND GAS PRODUC (60)! NOTE 5 OIL AND GAS PRODUC (61)! 9 PAGE 924 NOTE 6 RELATED PART! 9 PAGE 924 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (74) NOTE 7 OIL AND GAS INFORM (75) NOTE 7 OIL AND GAS INFORM (76)! 11 PAGE 926 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (30) SUPPLEMENTAL INFORMATION (28)Balance Sheet (31)Income Statement (32) STATEMENTS OF PARTNERS CA (31)Cash Flows (32)NOTE 4 INCOME TAXES (16)! NOTE 5 OIL AND GAS PRODUC (62)! NOTE 5 OIL AND GAS PRODUC (63)! 9 PAGE 943 NOTE 6 RELATED PART! 9 PAGE 943 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (77) NOTE 7 OIL AND GAS INFORM (78) NOTE 7 OIL AND GAS INFORM (79)!11 PAGE 945 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (31)!31 2000 1 PAGE 952 PARKER PARSLPARKER PARSLEY 89A LP ITEM 6 SELECTED FINANCIAL (17)INDEX TO FINANCIAL STATE (14)Balance Sheet (32)Income Statement (33) STATEMENTS OF PARTNERS CA (32)Cash Flows (33)NOTE 4 INCOME TAXES (17)! NOTE 5 OIL AND GAS PRODUC (64)! NOTE 5 OIL AND GAS PRODUC (65)! 16 PAGE 969 NOTE 6 RELATED PAR! 16 PAGE 969 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (80) NOTE 7 OIL AND GAS INFORM (81) NOTE 7 OIL AND GAS INFORM (82) NOTE 7 OIL AND GAS INFORM (83)! 18 PAGE 971 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (17)Beneficial Ownership (17)PARKER PARSLEY 89A LP (1)INDEX TO EXHIBITS (15)SELECTED FINANCIAL DATA (32) SUPPLEMENTAL INFORMATION (29)Balance Sheet (33)Income Statement (34) STATEMENTS OF PARTNERS CA (33)Cash Flows (34) 8 PAGE 991 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (66)! NOTE 5 OIL AND GAS PRODUC (67)! 9 PAGE 992 NOTE 6 RELATED PART! 9 PAGE 992 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (84) NOTE 7 OIL AND GAS INFORM (85) NOTE 7 OIL AND GAS INFORM (86)! 11 PAGE 994 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (33)!31 2000 1 PAGE 1001 PARKER PARSBalance Sheet (34)Income Statement (35) STATEMENTS OF PARTNERS CA (34)Cash Flows (35)!8 PAGE 1010 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (68)! NOTE 5 OIL AND GAS PRODUC (69)! 9 PAGE 1011 NOTE 6 RELATED PAR! 9 PAGE 1011 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (87) NOTE 7 OIL AND GAS INFORM (88) NOTE 7 OIL AND GAS INFORM (89)!11 PAGE 1013 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (34) SUPPLEMENTAL INFORMATION (30)Balance Sheet (35)Income Statement (36) STATEMENTS OF PARTNERS CA (35)Cash Flows (36)!8 PAGE 1029 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (70)! NOTE 5 OIL AND GAS PRODUC (71)! 9 PAGE 1030 NOTE 6 RELATED PAR! 9 PAGE 1030 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (90) NOTE 7 OIL AND GAS INFORM (91) NOTE 7 OIL AND GAS INFORM (92)! 11 PAGE 1032 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (35) SUPPLEMENTAL INFORMATION (31)Balance Sheet (36)Income Statement (37) STATEMENTS OF PARTNERS CA (36)Cash Flows (37)!8 PAGE 1048 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (72)! NOTE 5 OIL AND GAS PRODUC (73)! 9 PAGE 1049 NOTE 6 RELATED PAR! 9 PAGE 1049 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (93) NOTE 7 OIL AND GAS INFORM (94) NOTE 7 OIL AND GAS INFORM (95)! 11 PAGE 1051 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (36)!31 2000 1 PAGE 1058 PARKER PARSPARKER PARSLEY 90A LP ITEM 6 SELECTED FINANCIAL (18)INDEX TO FINANCIAL STATE (15)Balance Sheet (37)Income Statement (38) STATEMENTS OF PARTNERS CA (37)Cash Flows (38)!15 PAGE 1074 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (74)! NOTE 5 OIL AND GAS PRODUC (75)! NOTE 6 RELATED PARTY TRAN (10)! NOTE 6 RELATED PARTY TRAN (11) NOTE 7 OIL AND GAS INFORM (96) NOTE 7 OIL AND GAS INFORM (97)! 18 PAGE 1077 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (18)Beneficial Ownership (18)PARKER PARSLEY 90A LP (1)INDEX TO EXHIBITS (16)SELECTED FINANCIAL DATA (37) SUPPLEMENTAL INFORMATION (32)PARKER PARSLEY 90B CONV LP ITEM 6 SELECTED FINANCIAL (19)INDEX TO FINANCIAL STATE (16)Balance Sheet (38)Income Statement (39) STATEMENTS OF PARTNERS CA (38)Cash Flows (39)!16 PAGE 1105 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (76)! NOTE 5 OIL AND GAS PRODUC (77)! NOTE 6 RELATED PARTY TRAN (12)! NOTE 6 RELATED PARTY TRAN (13) NOTE 7 OIL AND GAS INFORM (98) NOTE 7 OIL AND GAS INFORM (99) NOTE 7 OIL AND GAS INFOR (100)! 19 PAGE 1108 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (19)Beneficial Ownership (19) PARKER PARSLEY 90B CONV LP (1)INDEX TO EXHIBITS (17)SELECTED FINANCIAL DATA (38)!31 2000 1 PAGE 1119 PARKER PARSPARKER PARSLEY 90B LP ITEM 6 SELECTED FINANCIAL (20)INDEX TO FINANCIAL STATE (17)Balance Sheet (39)Income Statement (40) STATEMENTS OF PARTNERS CA (39)Cash Flows (40)!16 PAGE 1136 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (78)! NOTE 5 OIL AND GAS PRODUC (79)! NOTE 6 RELATED PARTY TRAN (14)! NOTE 6 RELATED PARTY TRAN (15) NOTE 7 OIL AND GAS INFOR (101) NOTE 7 OIL AND GAS INFOR (102) NOTE 7 OIL AND GAS INFOR (103)! 19 PAGE 1139 NOTE 8 MAJOR CUS!ITEM 10 DIRECTORS AND EXEC (20)Beneficial Ownership (20)PARKER PARSLEY 90B LP (1)INDEX TO EXHIBITS (18)SELECTED FINANCIAL DATA (39) SUPPLEMENTAL INFORMATION (33)PARKER PARSLEY 90C CONV LP ITEM 6 SELECTED FINANCIAL (21)INDEX TO FINANCIAL STATE (18)Balance Sheet (40)Income Statement (41) STATEMENTS OF PARTNERS CA (40)Cash Flows (41)!15 PAGE 1166 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (80)! NOTE 5 OIL AND GAS PRODUC (81)! NOTE 6 RELATED PARTY TRAN (16)! NOTE 6 RELATED PARTY TRAN (17) NOTE 7 OIL AND GAS INFOR (104) NOTE 7 OIL AND GAS INFOR (105) NOTE 7 OIL AND GAS INFOR (106)! 18 PAGE 1169 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (21)Beneficial Ownership (21) PARKER PARSLEY 90C CONV LP (1)INDEX TO EXHIBITS (19)SELECTED FINANCIAL DATA (40)!31 2000 1 PAGE 1180 PARKER PARSPARKER PARSLEY 90C LP ITEM 6 SELECTED FINANCIAL (22)INDEX TO FINANCIAL STATE (19)Balance Sheet (41)Income Statement (42) STATEMENTS OF PARTNERS CA (41)Cash Flows (42)!15 PAGE 1196 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (82)! NOTE 5 OIL AND GAS PRODUC (83)! NOTE 6 RELATED PARTY TRAN (18)! NOTE 6 RELATED PARTY TRAN (19) NOTE 7 OIL AND GAS INFOR (107) NOTE 7 OIL AND GAS INFOR (108) NOTE 7 OIL AND GAS INFOR (109)! 18 PAGE 1199 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (22)Beneficial Ownership (22)PARKER PARSLEY 90C LP (1)INDEX TO EXHIBITS (20)SELECTED FINANCIAL DATA (41) SUPPLEMENTAL INFORMATION (34)Balance Sheet (42)Income Statement (43) STATEMENTS OF PARTNERS CA (42)Cash Flows (43)!8 PAGE 1219 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (84)! NOTE 5 OIL AND GAS PRODUC (85)! 9 PAGE 1220 NOTE 6 RELATED PAR! 9 PAGE 1220 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (110) NOTE 7 OIL AND GAS INFOR (111) NOTE 7 OIL AND GAS INFOR (112)! 11 PAGE 1222 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (42) SUPPLEMENTAL INFORMATION (35)Balance Sheet (43)Income Statement (44) STATEMENTS OF PARTNERS CA (43)Cash Flows (44)!8 PAGE 1238 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (86)! NOTE 5 OIL AND GAS PRODUC (87)! 9 PAGE 1239 NOTE 6 RELATED PAR! 9 PAGE 1239 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (113) NOTE 7 OIL AND GAS INFOR (114) NOTE 7 OIL AND GAS INFOR (115)! 11 PAGE 1241 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (43)!31 2000 1 PAGE 1248 PARKER PARSPARKER PARSLEY 91A LP ITEM 6 SELECTED FINANCIAL (23)INDEX TO FINANCIAL STATE (20)Balance Sheet (44)Income Statement (45) STATEMENTS OF PARTNERS CA (44)Cash Flows (45)!15 PAGE 1264 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (88)! NOTE 5 OIL AND GAS PRODUC (89)! NOTE 6 RELATED PARTY TRAN (20)! NOTE 6 RELATED PARTY TRAN (21) NOTE 7 OIL AND GAS INFOR (116) NOTE 7 OIL AND GAS INFOR (117) NOTE 7 OIL AND GAS INFOR (118)! 18 PAGE 1267 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (23)Beneficial Ownership (23)PARKER PARSLEY 91A LP (1)INDEX TO EXHIBITS (21)SELECTED FINANCIAL DATA (44)!31 2000 1 PAGE 1278 PARKER PARSPARKER PARSLEY 91B LP ITEM 6 SELECTED FINANCIAL (24)INDEX TO FINANCIAL STATE (21)Balance Sheet (45)Income Statement (46) STATEMENTS OF PARTNERS CA (45)Cash Flows (46)!15 PAGE 1294 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (90)! NOTE 5 OIL AND GAS PRODUC (91)! NOTE 6 RELATED PARTY TRAN (22)! NOTE 6 RELATED PARTY TRAN (23) NOTE 7 OIL AND GAS INFOR (119) NOTE 7 OIL AND GAS INFOR (120) NOTE 7 OIL AND GAS INFOR (121)! 18 PAGE 1297 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (24)Beneficial Ownership (24)PARKER PARSLEY 91B LP (1)INDEX TO EXHIBITS (22)SELECTED FINANCIAL DATA (45)POWER OF ATTORNEYPOWER OF ATTORNEY (1)POWER OF ATTORNEY (2)POWER OF ATTORNEY (3)POWER OF ATTORNEY (4)POWER OF ATTORNEY (5)POWER OF ATTORNEY (6)POWER OF ATTORNEY (7)!2001 THE BOARD OF DIRECTORS REC!2001 THE BOARD OF DIRECTORS (1)!2001 THE BOARD OF DIRECTORS (2)PAGE 2U } } }  #    $PIONEER NATURAL RESOURCES CO S-4 04/17/2001RJ-58- 68 COMPARATIVE PER SHARE MARKET PRICE AND DIVIDEND INFORMATION  PIONEER COMMON STOCK   MARKET PRICE   HIGH LOW 2001 First quarter= ףp=4@fffff.@ 2000 Fourth quarterzG4@zG(@ Third quarter(\0@(\B%@ Second quarter(\B/@~ & First quarter%@@ 1999 Fourth quarter'@Q@ Third quarterQ)@(\"@ Second quarterzGa*@= ףp=@ First quarter#@~ DlQE9-!vf$Da !"$ ____________________________1!)Created by Morningstar Document Research.0"(http://documentresearch.morningstar.com/ (=PF0*8X> @""!!  l    dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/?? SECURITIES AND EXC!CALCULATION OF REGISTRATION FEETO BE HELD ON 2001TABLE OF CONTENTSPAGE 7 LIST OF APPENDICES!LIMITED PARTNER INVESTMENT REPA!LIMITED PARTNER INVESTMENT (1) 5 PAGE 15 NYMEX FUTURES PRICES!EXAMPLE CALCULATION OF MERGER VIncome StatementIncome Statement (1)AT DECEMBER 31 2000!15 PAGE 25 COMPARATIVE PER SHAR!25 PAGE 35 REASONS FOR THE MERGFAIRNESS OPINIONFAIRNESS OPINION (1)!LEGAL OPINION FOR LIMITED PARTN!LEGAL OPINION FOR LIMITED P (1)!NONMANAGING GENERAL PARTNERS OF!49 PAGE 59 PAYMENT OF EXPENSES !58 PAGE 68 COMPARATIVE PER SHAR PIONEER PIONEER USATHE DRILLING PARTNERSHIPSTHE DRILLING PARTNERSHIPS (1)THE INCOME PARTNERSHIPS INTERESTSINTERESTS (1)INTERESTS (2)INTERESTS (3)INTERESTS (4)INTERESTS (5)!WHERE YOU CAN FIND MORE INFORMAAS OF DECEMBER 31 2000YEAR ENDED DECEMBER 31 2000!QUANTITIES OF OIL AND GAS RESER!STANDARDIZED MEASURE OF DISCOUN CASH FLOWSAS OF MARCH 31 2001AS OF MARCH 31 2001 (1)AS OF MARCH 31 2001 (2)AS OF MARCH 31 2001 (3)AS OF MARCH 31 2001 (4)AS OF MARCH 31 2001 (5)!FROM INCEPTION THROUGH MARCH 31!ANNUAL REPURCHASE PRICES AND AGOF EACH PARTNERSHIP!FOR THE THREE MONTHS ENDED MARCAS OF DECEMBER 31 2000 (1)AS OF MARCH 31 2001 (6)!THE YEARS ENDED DECEMBER 31 200AS OF DECEMBER 31 2000 (2)DECEMBER 31 2000 AND 1999EFFECTIVE DECEMBER 31 2000 EFFECTIVE DECEMBER 31 2000 (1) RECITALS RECITALS (1) SUPPLEMENTAL INFORMATION TABLEBalance SheetIncome Statement (2) STATEMENTS OF PARTNERS CAPITALCash Flows (1)NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCING A! NOTE 5 OIL AND GAS PRODUCI (1)! NOTE 6 RELATED PARTY TRANSACTI! NOTE 6 RELATED PARTY TRANS (1)! NOTE 7 OIL AND GAS INFORMATION! NOTE 7 OIL AND GAS INFORMA (1)! NOTE 7 OIL AND GAS INFORMA (2)!11 PAGE 163 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA SUPPLEMENTAL INFORMATION T (1)Balance Sheet (1)Income Statement (3) STATEMENTS OF PARTNERS CAP (1)Cash Flows (2)NOTE 4 INCOME TAXES (1)! NOTE 5 OIL AND GAS PRODUCI (2)! NOTE 5 OIL AND GAS PRODUCI (3)! 9 PAGE 180 NOTE 6 RELATED PAR! 9 PAGE 180 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORMA (3)! NOTE 7 OIL AND GAS INFORMA (4)! NOTE 7 OIL AND GAS INFORMA (5)!11 PAGE 182 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (1) SUPPLEMENTAL INFORMATION T (2) ITEM 6 SELECTED FINANCIAL DATAINDEX TO FINANCIAL STATEMENTSBalance Sheet (2)Income Statement (4) STATEMENTS OF PARTNERS CAP (2)Cash Flows (3)!15 PAGE 205 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCI (4)! NOTE 5 OIL AND GAS PRODUCI (5)! NOTE 6 RELATED PARTY TRANS (2)! NOTE 6 RELATED PARTY TRANS (3)! NOTE 7 OIL AND GAS INFORMA (6)! NOTE 7 OIL AND GAS INFORMA (7)! NOTE 7 OIL AND GAS INFORMA (8)! NOTE 7 OIL AND GAS INFORMA (9)! NOTE 7 OIL AND GAS INFORM (10)! 18 PAGE 208 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECUTIVEBeneficial OwnershipPARKER PARSLEY 82I LTDINDEX TO EXHIBITSSELECTED FINANCIAL DATA (2) SUPPLEMENTAL INFORMATION T (3) ITEM 6 SELECTED FINANCIAL (1)INDEX TO FINANCIAL STATEM (1)Balance Sheet (3)Income Statement (5) STATEMENTS OF PARTNERS CAP (3)Cash Flows (4)NOTE 4 INCOME TAXES (2)! NOTE 5 OIL AND GAS PRODUCI (6)! NOTE 5 OIL AND GAS PRODUCI (7)! 16 PAGE 236 NOTE 6 RELATED PAR! 16 PAGE 236 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (11)! NOTE 7 OIL AND GAS INFORM (12)! NOTE 7 OIL AND GAS INFORM (13)!18 PAGE 238 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (1)Beneficial Ownership (1)PARKER PARSLEY 82II LTDINDEX TO EXHIBITS (1)SELECTED FINANCIAL DATA (3) SUPPLEMENTAL INFORMATION T (4)Balance Sheet (4)Income Statement (6) STATEMENTS OF PARTNERS CAP (4)Cash Flows (5)NOTE 4 INCOME TAXES (3)! NOTE 5 OIL AND GAS PRODUCI (8)! NOTE 5 OIL AND GAS PRODUCI (9)! 9 PAGE 259 NOTE 6 RELATED PART! 9 PAGE 259 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (14)! NOTE 7 OIL AND GAS INFORM (15)! NOTE 7 OIL AND GAS INFORM (16)!11 PAGE 261 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (4) SUPPLEMENTAL INFORMATION T (5)PARKER PARSLEY 83A LTD ITEM 6 SELECTED FINANCIAL (2)INDEX TO FINANCIAL STATEM (2)Balance Sheet (5)Income Statement (7) STATEMENTS OF PARTNERS CAP (5)Cash Flows (6)NOTE 4 INCOME TAXES (4)! NOTE 5 OIL AND GAS PRODUC (10)! NOTE 5 OIL AND GAS PRODUC (11)! 16 PAGE 285 NOTE 6 RELATED PAR! 16 PAGE 285 NOTE 6 RELATED (1)!NOTE 7 OIL AND GAS INFORMATION  NOTE 7 OIL AND GAS INFORMA (1) NOTE 7 OIL AND GAS INFORMA (2)! 18 PAGE 287 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECU (2)Beneficial Ownership (2)PARKER PARSLEY 83A LTD (1)INDEX TO EXHIBITS (2)SELECTED FINANCIAL DATA (5) SUPPLEMENTAL INFORMATION T (6)PARKER PARSLEY 83B LTD ITEM 6 SELECTED FINANCIAL (3)INDEX TO FINANCIAL STATEM (3)Balance Sheet (6)Income Statement (8) STATEMENTS OF PARTNERS CAP (6)Cash Flows (7)NOTE 4 INCOME TAXES (5)! NOTE 5 OIL AND GAS PRODUC (12)! NOTE 5 OIL AND GAS PRODUC (13)! 16 PAGE 315 NOTE 6 RELATED PAR! 16 PAGE 315 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (3) NOTE 7 OIL AND GAS INFORMA (4) NOTE 7 OIL AND GAS INFORMA (5)!18 PAGE 317 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (3)Beneficial Ownership (3)PARKER PARSLEY 83B LTD (1)INDEX TO EXHIBITS (3)SELECTED FINANCIAL DATA (6) SUPPLEMENTAL INFORMATION T (7)PARKER PARSLEY 84A LTD ITEM 6 SELECTED FINANCIAL (4)INDEX TO FINANCIAL STATEM (4)Balance Sheet (7)Income Statement (9) STATEMENTS OF PARTNERS CAP (7)Cash Flows (8)!15 PAGE 344 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (14)! NOTE 5 OIL AND GAS PRODUC (15)! 16 PAGE 345 NOTE 6 RELATED PAR! 16 PAGE 345 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (6) NOTE 7 OIL AND GAS INFORMA (7) NOTE 7 OIL AND GAS INFORMA (8)!18 PAGE 347 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (4)Beneficial Ownership (4)PARKER PARSLEY 84A LTD (1)INDEX TO EXHIBITS (4)SELECTED FINANCIAL DATA (7) SUPPLEMENTAL INFORMATION T (8)PARKER PARSLEY 85A LTD ITEM 6 SELECTED FINANCIAL (5)INDEX TO FINANCIAL STATEM (5)Balance Sheet (8)Income Statement (10) STATEMENTS OF PARTNERS CAP (8)Cash Flows (9)NOTE 4 INCOME TAXES (6)! NOTE 5 OIL AND GAS PRODUC (16)! NOTE 5 OIL AND GAS PRODUC (17)! 16 PAGE 375 NOTE 6 RELATED PAR! 16 PAGE 375 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (9) NOTE 7 OIL AND GAS INFORM (10) NOTE 7 OIL AND GAS INFORM (11)!18 PAGE 377 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (5)Beneficial Ownership (5)PARKER PARSLEY 85A LTD (1)INDEX TO EXHIBITS (5)SELECTED FINANCIAL DATA (8) SUPPLEMENTAL INFORMATION T (9)PARKER PARSLEY 85B LTD ITEM 6 SELECTED FINANCIAL (6)!7 PAGE 396 ITEM 8 FINANCIAL STABalance Sheet (9) STATEMENTS OF PARTNERS CAP (9)Cash Flows (10)!15 PAGE 404 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (18)! NOTE 5 OIL AND GAS PRODUC (19)! 16 PAGE 405 NOTE 6 RELATED PAR! 16 PAGE 405 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (12) NOTE 7 OIL AND GAS INFORM (13) NOTE 7 OIL AND GAS INFORM (14)!18 PAGE 407 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (6)Beneficial Ownership (6)PARKER PARSLEY 85B LTD (1)INDEX TO EXHIBITS (6)SELECTED FINANCIAL DATA (9) SUPPLEMENTAL INFORMATION (10)Balance Sheet (10)Income Statement (11) STATEMENTS OF PARTNERS CA (10)Cash Flows (11)NOTE 4 INCOME TAXES (7)! NOTE 5 OIL AND GAS PRODUC (20)! NOTE 5 OIL AND GAS PRODUC (21)! 9 PAGE 428 NOTE 6 RELATED PART! 9 PAGE 428 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (15) NOTE 7 OIL AND GAS INFORM (16) NOTE 7 OIL AND GAS INFORM (17)! 11 PAGE 430 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (10) SUPPLEMENTAL INFORMATION (11)Balance Sheet (11)Income Statement (12) STATEMENTS OF PARTNERS CA (11)Cash Flows (12) 8 PAGE 446 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (22)! NOTE 5 OIL AND GAS PRODUC (23)! 9 PAGE 447 NOTE 6 RELATED PART! 9 PAGE 447 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (18) NOTE 7 OIL AND GAS INFORM (19) NOTE 7 OIL AND GAS INFORM (20)! 11 PAGE 449 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (11) SUPPLEMENTAL INFORMATION (12)PARKER PARSLEY 86A LTD ITEM 6 SELECTED FINANCIAL (7)INDEX TO FINANCIAL STATEM (6)Balance Sheet (12)Income Statement (13) STATEMENTS OF PARTNERS CA (12)Cash Flows (13)NOTE 4 INCOME TAXES (8)! NOTE 5 OIL AND GAS PRODUC (24)! NOTE 5 OIL AND GAS PRODUC (25)! 16 PAGE 473 NOTE 6 RELATED PAR! 16 PAGE 473 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (21) NOTE 7 OIL AND GAS INFORM (22) NOTE 7 OIL AND GAS INFORM (23)!18 PAGE 475 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (7)Beneficial Ownership (7)PARKER PARSLEY 86A LTD (1)INDEX TO EXHIBITS (7)SELECTED FINANCIAL DATA (12) SUPPLEMENTAL INFORMATION (13)PARKER PARSLEY 86B LTD ITEM 6 SELECTED FINANCIAL (8)INDEX TO FINANCIAL STATEM (7)Balance Sheet (13)Income Statement (14) STATEMENTS OF PARTNERS CA (13)Cash Flows (14)!16 PAGE 503 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (26)! NOTE 5 OIL AND GAS PRODUC (27)! NOTE 6 RELATED PARTY TRANS (4)! NOTE 6 RELATED PARTY TRANS (5) NOTE 7 OIL AND GAS INFORM (24) NOTE 7 OIL AND GAS INFORM (25) NOTE 7 OIL AND GAS INFORM (26)!19 PAGE 506 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (8)Beneficial Ownership (8)PARKER PARSLEY 86B LTD (1)INDEX TO EXHIBITS (8)SELECTED FINANCIAL DATA (13) SUPPLEMENTAL INFORMATION (14) ITEM 6 SELECTED FINANCIAL (9)!7 PAGE 525 ITEM 8 FINANCIAL STABalance Sheet (14)Income Statement (15) STATEMENTS OF PARTNERS CA (14)Cash Flows (15)NOTE 4 INCOME TAXES (9)! NOTE 5 OIL AND GAS PRODUC (28)! NOTE 5 OIL AND GAS PRODUC (29)! 16 PAGE 534 NOTE 6 RELATED PAR! 16 PAGE 534 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (27) NOTE 7 OIL AND GAS INFORM (28) NOTE 7 OIL AND GAS INFORM (29)!18 PAGE 536 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (9)Beneficial Ownership (9)PARKER PARSLEY 86C LTDSELECTED FINANCIAL DATA (14) SUPPLEMENTAL INFORMATION (15)Balance Sheet (15)Income Statement (16) STATEMENTS OF PARTNERS CA (15)Cash Flows (16) 8 PAGE 556 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (30)! NOTE 5 OIL AND GAS PRODUC (31)! NOTE 6 RELATED PARTY TRANS (6)! NOTE 6 RELATED PARTY TRANS (7) NOTE 7 OIL AND GAS INFORM (30) NOTE 7 OIL AND GAS INFORM (31) NOTE 7 OIL AND GAS INFORM (32)! 11 PAGE 559 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (15) SUPPLEMENTAL INFORMATION (16)Balance Sheet (16)Income Statement (17) STATEMENTS OF PARTNERS CA (16)Cash Flows (17)NOTE 4 INCOME TAXES (10)! NOTE 5 OIL AND GAS PRODUC (32)! NOTE 5 OIL AND GAS PRODUC (33)! 9 PAGE 576 NOTE 6 RELATED PART! 9 PAGE 576 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (33) NOTE 7 OIL AND GAS INFORM (34) NOTE 7 OIL AND GAS INFORM (35)!11 PAGE 578 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (16) SUPPLEMENTAL INFORMATION (17) ITEM 6 SELECTED FINANCIAL (10)!8 PAGE 594 ITEM 8 FINANCIAL STABalance Sheet (17)Income Statement (18) STATEMENTS OF PARTNERS CA (17)Cash Flows (18)NOTE 4 INCOME TAXES (11)! NOTE 5 OIL AND GAS PRODUC (34)! NOTE 5 OIL AND GAS PRODUC (35)! 17 PAGE 603 NOTE 6 RELATED PAR! 17 PAGE 603 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (36) NOTE 7 OIL AND GAS INFORM (37) NOTE 7 OIL AND GAS INFORM (38)! 19 PAGE 605 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (10)Beneficial Ownership (10)PARKER PARSLEY 87A LTDSELECTED FINANCIAL DATA (17) SUPPLEMENTAL INFORMATION (18)Balance Sheet (18)Income Statement (19) STATEMENTS OF PARTNERS CA (18)Cash Flows (19) 8 PAGE 625 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (36)! NOTE 5 OIL AND GAS PRODUC (37)! 9 PAGE 626 NOTE 6 RELATED PART! 9 PAGE 626 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (39) NOTE 7 OIL AND GAS INFORM (40) NOTE 7 OIL AND GAS INFORM (41)! 11 PAGE 628 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (18) SUPPLEMENTAL INFORMATION (19) ITEM 6 SELECTED FINANCIAL (11)INDEX TO FINANCIAL STATEM (8)Balance Sheet (19)Income Statement (20) STATEMENTS OF PARTNERS CA (19)Cash Flows (20)NOTE 4 INCOME TAXES (12)! NOTE 5 OIL AND GAS PRODUC (38)! NOTE 5 OIL AND GAS PRODUC (39)! 17 PAGE 653 NOTE 6 RELATED PAR! 17 PAGE 653 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (42) NOTE 7 OIL AND GAS INFORM (43) NOTE 7 OIL AND GAS INFORM (44)! 19 PAGE 655 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (11)Beneficial Ownership (11)PARKER PARSLEY 87B LTDINDEX TO EXHIBITS (9)SELECTED FINANCIAL DATA (19) SUPPLEMENTAL INFORMATION (20) ITEM 6 SELECTED FINANCIAL (12)INDEX TO FINANCIAL STATEM (9)Balance Sheet (20)Income Statement (21) STATEMENTS OF PARTNERS CA (20)Cash Flows (21)!16 PAGE 683 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (40)! NOTE 5 OIL AND GAS PRODUC (41)! NOTE 6 RELATED PARTY TRANS (8)! NOTE 6 RELATED PARTY TRANS (9) NOTE 7 OIL AND GAS INFORM (45) NOTE 7 OIL AND GAS INFORM (46) NOTE 7 OIL AND GAS INFORM (47)!19 PAGE 686 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (12)Beneficial Ownership (12)PROPERTIES 87A LTDINDEX TO EXHIBITS (10)SELECTED FINANCIAL DATA (20) SUPPLEMENTAL INFORMATION (21) ITEM 6 SELECTED FINANCIAL (13)INDEX TO FINANCIAL STATE (10)Balance Sheet (21)Income Statement (22) STATEMENTS OF PARTNERS CA (21)Cash Flows (22)!16 PAGE 714 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (42)! NOTE 5 OIL AND GAS PRODUC (43)! 17 PAGE 715 NOTE 6 RELATED PAR! 17 PAGE 715 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (48) NOTE 7 OIL AND GAS INFORM (49) NOTE 7 OIL AND GAS INFORM (50)! 19 PAGE 717 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (13)Beneficial Ownership (13)PROPERTIES 87B LTDINDEX TO EXHIBITS (11)SELECTED FINANCIAL DATA (21) SUPPLEMENTAL INFORMATION (22)Balance Sheet (22)Income Statement (23) STATEMENTS OF PARTNERS CA (22)Cash Flows (23) 8 PAGE 737 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (44)! NOTE 5 OIL AND GAS PRODUC (45)! 9 PAGE 738 NOTE 6 RELATED PART! 9 PAGE 738 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (51) NOTE 7 OIL AND GAS INFORM (52) NOTE 7 OIL AND GAS INFORM (53)! 11 PAGE 740 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (22) SUPPLEMENTAL INFORMATION (23)Balance Sheet (23)Income Statement (24) STATEMENTS OF PARTNERS CA (23)Cash Flows (24) 8 PAGE 756 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (46)! NOTE 5 OIL AND GAS PRODUC (47)! 9 PAGE 757 NOTE 6 RELATED PART! 9 PAGE 757 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (54) NOTE 7 OIL AND GAS INFORM (55) NOTE 7 OIL AND GAS INFORM (56)! 11 PAGE 759 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (23)!31 2000 1 PAGE 766 PARKER PARSLPARKER PARSLEY 88A LP ITEM 6 SELECTED FINANCIAL (14)INDEX TO FINANCIAL STATE (11)Balance Sheet (24)Income Statement (25) STATEMENTS OF PARTNERS CA (24)Cash Flows (25)NOTE 4 INCOME TAXES (13)! NOTE 5 OIL AND GAS PRODUC (48)! NOTE 5 OIL AND GAS PRODUC (49)! 16 PAGE 783 NOTE 6 RELATED PAR! 16 PAGE 783 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (57) NOTE 7 OIL AND GAS INFORM (58) NOTE 7 OIL AND GAS INFORM (59)! 18 PAGE 785 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (14)Beneficial Ownership (14)PARKER PARSLEY 88A LP (1)INDEX TO EXHIBITS (12)SELECTED FINANCIAL DATA (24) SUPPLEMENTAL INFORMATION (24)Balance Sheet (25)Income Statement (26) STATEMENTS OF PARTNERS CA (25)Cash Flows (26) 8 PAGE 805 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (50)! NOTE 5 OIL AND GAS PRODUC (51)! 9 PAGE 806 NOTE 6 RELATED PART! 9 PAGE 806 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (60) NOTE 7 OIL AND GAS INFORM (61) NOTE 7 OIL AND GAS INFORM (62)! 11 PAGE 808 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (25)!31 2000 1 PAGE 815 PARKER PARSLPARKER PARSLEY 88B LP ITEM 6 SELECTED FINANCIAL (15)INDEX TO FINANCIAL STATE (12)Balance Sheet (26)Income Statement (27) STATEMENTS OF PARTNERS CA (26)Cash Flows (27)!16 PAGE 832 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (52)! NOTE 5 OIL AND GAS PRODUC (53)! 17 PAGE 833 NOTE 6 RELATED PAR! 17 PAGE 833 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (63) NOTE 7 OIL AND GAS INFORM (64) NOTE 7 OIL AND GAS INFORM (65)! 19 PAGE 835 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (15)Beneficial Ownership (15)PARKER PARSLEY 88B LP (1)INDEX TO EXHIBITS (13)SELECTED FINANCIAL DATA (26) SUPPLEMENTAL INFORMATION (25)Balance Sheet (27)Income Statement (28) STATEMENTS OF PARTNERS CA (27)Cash Flows (28) 8 PAGE 855 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (54)! NOTE 5 OIL AND GAS PRODUC (55)! 9 PAGE 856 NOTE 6 RELATED PART! 9 PAGE 856 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (66) NOTE 7 OIL AND GAS INFORM (67) NOTE 7 OIL AND GAS INFORM (68)! 11 PAGE 858 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (27)!31 2000 1 PAGE 865 PARKER PARSLBalance Sheet (28)Income Statement (29) STATEMENTS OF PARTNERS CA (28)Cash Flows (29) 8 PAGE 874 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (56)! NOTE 5 OIL AND GAS PRODUC (57)! 9 PAGE 875 NOTE 6 RELATED PART! 9 PAGE 875 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (69) NOTE 7 OIL AND GAS INFORM (70) NOTE 7 OIL AND GAS INFORM (71)! 11 PAGE 877 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (28) SUPPLEMENTAL INFORMATION (26)!PARKER PARSLEY PRODUCING PROPER ITEM 6 SELECTED FINANCIAL (16)INDEX TO FINANCIAL STATE (13)Balance Sheet (29)Income Statement (30) STATEMENTS OF PARTNERS CA (29)Cash Flows (30)NOTE 4 INCOME TAXES (14)! NOTE 5 OIL AND GAS PRODUC (58)! NOTE 5 OIL AND GAS PRODUC (59)! 16 PAGE 901 NOTE 6 RELATED PAR! 16 PAGE 901 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (72) NOTE 7 OIL AND GAS INFORM (73)!18 PAGE 903 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (16)Beneficial Ownership (16)PROPERTIES 88A LPINDEX TO EXHIBITS (14)SELECTED FINANCIAL DATA (29) SUPPLEMENTAL INFORMATION (27)Balance Sheet (30)Income Statement (31) STATEMENTS OF PARTNERS CA (30)Cash Flows (31)NOTE 4 INCOME TAXES (15)! NOTE 5 OIL AND GAS PRODUC (60)! NOTE 5 OIL AND GAS PRODUC (61)! 9 PAGE 924 NOTE 6 RELATED PART! 9 PAGE 924 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (74) NOTE 7 OIL AND GAS INFORM (75) NOTE 7 OIL AND GAS INFORM (76)! 11 PAGE 926 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (30) SUPPLEMENTAL INFORMATION (28)Balance Sheet (31)Income Statement (32) STATEMENTS OF PARTNERS CA (31)Cash Flows (32)NOTE 4 INCOME TAXES (16)! NOTE 5 OIL AND GAS PRODUC (62)! NOTE 5 OIL AND GAS PRODUC (63)! 9 PAGE 943 NOTE 6 RELATED PART! 9 PAGE 943 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (77) NOTE 7 OIL AND GAS INFORM (78) NOTE 7 OIL AND GAS INFORM (79)!11 PAGE 945 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (31)!31 2000 1 PAGE 952 PARKER PARSLPARKER PARSLEY 89A LP ITEM 6 SELECTED FINANCIAL (17)INDEX TO FINANCIAL STATE (14)Balance Sheet (32)Income Statement (33) STATEMENTS OF PARTNERS CA (32)Cash Flows (33)NOTE 4 INCOME TAXES (17)! NOTE 5 OIL AND GAS PRODUC (64)! NOTE 5 OIL AND GAS PRODUC (65)! 16 PAGE 969 NOTE 6 RELATED PAR! 16 PAGE 969 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (80) NOTE 7 OIL AND GAS INFORM (81) NOTE 7 OIL AND GAS INFORM (82) NOTE 7 OIL AND GAS INFORM (83)! 18 PAGE 971 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (17)Beneficial Ownership (17)PARKER PARSLEY 89A LP (1)INDEX TO EXHIBITS (15)SELECTED FINANCIAL DATA (32) SUPPLEMENTAL INFORMATION (29)Balance Sheet (33)Income Statement (34) STATEMENTS OF PARTNERS CA (33)Cash Flows (34) 8 PAGE 991 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (66)! NOTE 5 OIL AND GAS PRODUC (67)! 9 PAGE 992 NOTE 6 RELATED PART! 9 PAGE 992 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (84) NOTE 7 OIL AND GAS INFORM (85) NOTE 7 OIL AND GAS INFORM (86)! 11 PAGE 994 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (33)!31 2000 1 PAGE 1001 PARKER PARSBalance Sheet (34)Income Statement (35) STATEMENTS OF PARTNERS CA (34)Cash Flows (35)!8 PAGE 1010 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (68)! NOTE 5 OIL AND GAS PRODUC (69)! 9 PAGE 1011 NOTE 6 RELATED PAR! 9 PAGE 1011 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (87) NOTE 7 OIL AND GAS INFORM (88) NOTE 7 OIL AND GAS INFORM (89)!11 PAGE 1013 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (34) SUPPLEMENTAL INFORMATION (30)Balance Sheet (35)Income Statement (36) STATEMENTS OF PARTNERS CA (35)Cash Flows (36)!8 PAGE 1029 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (70)! NOTE 5 OIL AND GAS PRODUC (71)! 9 PAGE 1030 NOTE 6 RELATED PAR! 9 PAGE 1030 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (90) NOTE 7 OIL AND GAS INFORM (91) NOTE 7 OIL AND GAS INFORM (92)! 11 PAGE 1032 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (35) SUPPLEMENTAL INFORMATION (31)Balance Sheet (36)Income Statement (37) STATEMENTS OF PARTNERS CA (36)Cash Flows (37)!8 PAGE 1048 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (72)! NOTE 5 OIL AND GAS PRODUC (73)! 9 PAGE 1049 NOTE 6 RELATED PAR! 9 PAGE 1049 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (93) NOTE 7 OIL AND GAS INFORM (94) NOTE 7 OIL AND GAS INFORM (95)! 11 PAGE 1051 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (36)!31 2000 1 PAGE 1058 PARKER PARSPARKER PARSLEY 90A LP ITEM 6 SELECTED FINANCIAL (18)INDEX TO FINANCIAL STATE (15)Balance Sheet (37)Income Statement (38) STATEMENTS OF PARTNERS CA (37)Cash Flows (38)!15 PAGE 1074 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (74)! NOTE 5 OIL AND GAS PRODUC (75)! NOTE 6 RELATED PARTY TRAN (10)! NOTE 6 RELATED PARTY TRAN (11) NOTE 7 OIL AND GAS INFORM (96) NOTE 7 OIL AND GAS INFORM (97)! 18 PAGE 1077 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (18)Beneficial Ownership (18)PARKER PARSLEY 90A LP (1)INDEX TO EXHIBITS (16)SELECTED FINANCIAL DATA (37) SUPPLEMENTAL INFORMATION (32)PARKER PARSLEY 90B CONV LP ITEM 6 SELECTED FINANCIAL (19)INDEX TO FINANCIAL STATE (16)Balance Sheet (38)Income Statement (39) STATEMENTS OF PARTNERS CA (38)Cash Flows (39)!16 PAGE 1105 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (76)! NOTE 5 OIL AND GAS PRODUC (77)! NOTE 6 RELATED PARTY TRAN (12)! NOTE 6 RELATED PARTY TRAN (13) NOTE 7 OIL AND GAS INFORM (98) NOTE 7 OIL AND GAS INFORM (99) NOTE 7 OIL AND GAS INFOR (100)! 19 PAGE 1108 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (19)Beneficial Ownership (19) PARKER PARSLEY 90B CONV LP (1)INDEX TO EXHIBITS (17)SELECTED FINANCIAL DATA (38)!31 2000 1 PAGE 1119 PARKER PARSPARKER PARSLEY 90B LP ITEM 6 SELECTED FINANCIAL (20)INDEX TO FINANCIAL STATE (17)Balance Sheet (39)Income Statement (40) STATEMENTS OF PARTNERS CA (39)Cash Flows (40)!16 PAGE 1136 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (78)! NOTE 5 OIL AND GAS PRODUC (79)! NOTE 6 RELATED PARTY TRAN (14)! NOTE 6 RELATED PARTY TRAN (15) NOTE 7 OIL AND GAS INFOR (101) NOTE 7 OIL AND GAS INFOR (102) NOTE 7 OIL AND GAS INFOR (103)! 19 PAGE 1139 NOTE 8 MAJOR CUS!ITEM 10 DIRECTORS AND EXEC (20)Beneficial Ownership (20)PARKER PARSLEY 90B LP (1)INDEX TO EXHIBITS (18)SELECTED FINANCIAL DATA (39) SUPPLEMENTAL INFORMATION (33)PARKER PARSLEY 90C CONV LP ITEM 6 SELECTED FINANCIAL (21)INDEX TO FINANCIAL STATE (18)Balance Sheet (40)Income Statement (41) STATEMENTS OF PARTNERS CA (40)Cash Flows (41)!15 PAGE 1166 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (80)! NOTE 5 OIL AND GAS PRODUC (81)! NOTE 6 RELATED PARTY TRAN (16)! NOTE 6 RELATED PARTY TRAN (17) NOTE 7 OIL AND GAS INFOR (104) NOTE 7 OIL AND GAS INFOR (105) NOTE 7 OIL AND GAS INFOR (106)! 18 PAGE 1169 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (21)Beneficial Ownership (21) PARKER PARSLEY 90C CONV LP (1)INDEX TO EXHIBITS (19)SELECTED FINANCIAL DATA (40)!31 2000 1 PAGE 1180 PARKER PARSPARKER PARSLEY 90C LP ITEM 6 SELECTED FINANCIAL (22)INDEX TO FINANCIAL STATE (19)Balance Sheet (41)Income Statement (42) STATEMENTS OF PARTNERS CA (41)Cash Flows (42)!15 PAGE 1196 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (82)! NOTE 5 OIL AND GAS PRODUC (83)! NOTE 6 RELATED PARTY TRAN (18)! NOTE 6 RELATED PARTY TRAN (19) NOTE 7 OIL AND GAS INFOR (107) NOTE 7 OIL AND GAS INFOR (108) NOTE 7 OIL AND GAS INFOR (109)! 18 PAGE 1199 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (22)Beneficial Ownership (22)PARKER PARSLEY 90C LP (1)INDEX TO EXHIBITS (20)SELECTED FINANCIAL DATA (41) SUPPLEMENTAL INFORMATION (34)Balance Sheet (42)Income Statement (43) STATEMENTS OF PARTNERS CA (42)Cash Flows (43)!8 PAGE 1219 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (84)! NOTE 5 OIL AND GAS PRODUC (85)! 9 PAGE 1220 NOTE 6 RELATED PAR! 9 PAGE 1220 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (110) NOTE 7 OIL AND GAS INFOR (111) NOTE 7 OIL AND GAS INFOR (112)! 11 PAGE 1222 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (42) SUPPLEMENTAL INFORMATION (35)Balance Sheet (43)Income Statement (44) STATEMENTS OF PARTNERS CA (43)Cash Flows (44)!8 PAGE 1238 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (86)! NOTE 5 OIL AND GAS PRODUC (87)! 9 PAGE 1239 NOTE 6 RELATED PAR! 9 PAGE 1239 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (113) NOTE 7 OIL AND GAS INFOR (114) NOTE 7 OIL AND GAS INFOR (115)! 11 PAGE 1241 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (43)!31 2000 1 PAGE 1248 PARKER PARSPARKER PARSLEY 91A LP ITEM 6 SELECTED FINANCIAL (23)INDEX TO FINANCIAL STATE (20)Balance Sheet (44)Income Statement (45) STATEMENTS OF PARTNERS CA (44)Cash Flows (45)!15 PAGE 1264 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (88)! NOTE 5 OIL AND GAS PRODUC (89)! NOTE 6 RELATED PARTY TRAN (20)! NOTE 6 RELATED PARTY TRAN (21) NOTE 7 OIL AND GAS INFOR (116) NOTE 7 OIL AND GAS INFOR (117) NOTE 7 OIL AND GAS INFOR (118)! 18 PAGE 1267 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (23)Beneficial Ownership (23)PARKER PARSLEY 91A LP (1)INDEX TO EXHIBITS (21)SELECTED FINANCIAL DATA (44)!31 2000 1 PAGE 1278 PARKER PARSPARKER PARSLEY 91B LP ITEM 6 SELECTED FINANCIAL (24)INDEX TO FINANCIAL STATE (21)Balance Sheet (45)Income Statement (46) STATEMENTS OF PARTNERS CA (45)Cash Flows (46)!15 PAGE 1294 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (90)! NOTE 5 OIL AND GAS PRODUC (91)! NOTE 6 RELATED PARTY TRAN (22)! NOTE 6 RELATED PARTY TRAN (23) NOTE 7 OIL AND GAS INFOR (119) NOTE 7 OIL AND GAS INFOR (120) NOTE 7 OIL AND GAS INFOR (121)! 18 PAGE 1297 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (24)Beneficial Ownership (24)PARKER PARSLEY 91B LP (1)INDEX TO EXHIBITS (22)SELECTED FINANCIAL DATA (45)POWER OF ATTORNEYPOWER OF ATTORNEY (1)POWER OF ATTORNEY (2)POWER OF ATTORNEY (3)POWER OF ATTORNEY (4)POWER OF ATTORNEY (5)POWER OF ATTORNEY (6)POWER OF ATTORNEY (7)!2001 THE BOARD OF DIRECTORS REC!2001 THE BOARD OF DIRECTORS (1)!2001 THE BOARD OF DIRECTORS (2)PAGE 2U } $4}      $PIONEER NATURAL RESOURCES CO S-4 04/17/200191-60- 70 OWNERSHIP OF PARTNERSHIP INTERESTS 1 ) Parker & Parsley 81-I, Ltd. 5.84%1 ) Parker & Parsley 82-1, Ltd. 10.73%3 + Parker & Parsley 82-III, Ltd. 5.97%$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/(Tj^RF:.YMA=PF0*8X> @ l  mX dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/?? SECURITIES AND EXC!CALCULATION OF REGISTRATION FEETO BE HELD ON 2001TABLE OF CONTENTSPAGE 7 LIST OF APPENDICES!LIMITED PARTNER INVESTMENT REPA!LIMITED PARTNER INVESTMENT (1) 5 PAGE 15 NYMEX FUTURES PRICES!EXAMPLE CALCULATION OF MERGER VIncome StatementIncome Statement (1)AT DECEMBER 31 2000!15 PAGE 25 COMPARATIVE PER SHAR!25 PAGE 35 REASONS FOR THE MERGFAIRNESS OPINIONFAIRNESS OPINION (1)!LEGAL OPINION FOR LIMITED PARTN!LEGAL OPINION FOR LIMITED P (1)!NONMANAGING GENERAL PARTNERS OF!49 PAGE 59 PAYMENT OF EXPENSES !58 PAGE 68 COMPARATIVE PER SHAR!60 PAGE 70 OWNERSHIP OF PARTNER PIONEER USATHE DRILLING PARTNERSHIPSTHE DRILLING PARTNERSHIPS (1)THE INCOME PARTNERSHIPS INTERESTSINTERESTS (1)INTERESTS (2)INTERESTS (3)INTERESTS (4)INTERESTS (5)!WHERE YOU CAN FIND MORE INFORMAAS OF DECEMBER 31 2000YEAR ENDED DECEMBER 31 2000!QUANTITIES OF OIL AND GAS RESER!STANDARDIZED MEASURE OF DISCOUN CASH FLOWSAS OF MARCH 31 2001AS OF MARCH 31 2001 (1)AS OF MARCH 31 2001 (2)AS OF MARCH 31 2001 (3)AS OF MARCH 31 2001 (4)AS OF MARCH 31 2001 (5)!FROM INCEPTION THROUGH MARCH 31!ANNUAL REPURCHASE PRICES AND AGOF EACH PARTNERSHIP!FOR THE THREE MONTHS ENDED MARCAS OF DECEMBER 31 2000 (1)AS OF MARCH 31 2001 (6)!THE YEARS ENDED DECEMBER 31 200AS OF DECEMBER 31 2000 (2)DECEMBER 31 2000 AND 1999EFFECTIVE DECEMBER 31 2000 EFFECTIVE DECEMBER 31 2000 (1) RECITALS RECITALS (1) SUPPLEMENTAL INFORMATION TABLEBalance SheetIncome Statement (2) STATEMENTS OF PARTNERS CAPITALCash Flows (1)NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCING A! NOTE 5 OIL AND GAS PRODUCI (1)! NOTE 6 RELATED PARTY TRANSACTI! NOTE 6 RELATED PARTY TRANS (1)! NOTE 7 OIL AND GAS INFORMATION! NOTE 7 OIL AND GAS INFORMA (1)! NOTE 7 OIL AND GAS INFORMA (2)!11 PAGE 163 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA SUPPLEMENTAL INFORMATION T (1)Balance Sheet (1)Income Statement (3) STATEMENTS OF PARTNERS CAP (1)Cash Flows (2)NOTE 4 INCOME TAXES (1)! NOTE 5 OIL AND GAS PRODUCI (2)! NOTE 5 OIL AND GAS PRODUCI (3)! 9 PAGE 180 NOTE 6 RELATED PAR! 9 PAGE 180 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORMA (3)! NOTE 7 OIL AND GAS INFORMA (4)! NOTE 7 OIL AND GAS INFORMA (5)!11 PAGE 182 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (1) SUPPLEMENTAL INFORMATION T (2) ITEM 6 SELECTED FINANCIAL DATAINDEX TO FINANCIAL STATEMENTSBalance Sheet (2)Income Statement (4) STATEMENTS OF PARTNERS CAP (2)Cash Flows (3)!15 PAGE 205 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCI (4)! NOTE 5 OIL AND GAS PRODUCI (5)! NOTE 6 RELATED PARTY TRANS (2)! NOTE 6 RELATED PARTY TRANS (3)! NOTE 7 OIL AND GAS INFORMA (6)! NOTE 7 OIL AND GAS INFORMA (7)! NOTE 7 OIL AND GAS INFORMA (8)! NOTE 7 OIL AND GAS INFORMA (9)! NOTE 7 OIL AND GAS INFORM (10)! 18 PAGE 208 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECUTIVEBeneficial OwnershipPARKER PARSLEY 82I LTDINDEX TO EXHIBITSSELECTED FINANCIAL DATA (2) SUPPLEMENTAL INFORMATION T (3) ITEM 6 SELECTED FINANCIAL (1)INDEX TO FINANCIAL STATEM (1)Balance Sheet (3)Income Statement (5) STATEMENTS OF PARTNERS CAP (3)Cash Flows (4)NOTE 4 INCOME TAXES (2)! NOTE 5 OIL AND GAS PRODUCI (6)! NOTE 5 OIL AND GAS PRODUCI (7)! 16 PAGE 236 NOTE 6 RELATED PAR! 16 PAGE 236 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (11)! NOTE 7 OIL AND GAS INFORM (12)! NOTE 7 OIL AND GAS INFORM (13)!18 PAGE 238 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (1)Beneficial Ownership (1)PARKER PARSLEY 82II LTDINDEX TO EXHIBITS (1)SELECTED FINANCIAL DATA (3) SUPPLEMENTAL INFORMATION T (4)Balance Sheet (4)Income Statement (6) STATEMENTS OF PARTNERS CAP (4)Cash Flows (5)NOTE 4 INCOME TAXES (3)! NOTE 5 OIL AND GAS PRODUCI (8)! NOTE 5 OIL AND GAS PRODUCI (9)! 9 PAGE 259 NOTE 6 RELATED PART! 9 PAGE 259 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (14)! NOTE 7 OIL AND GAS INFORM (15)! NOTE 7 OIL AND GAS INFORM (16)!11 PAGE 261 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (4) SUPPLEMENTAL INFORMATION T (5)PARKER PARSLEY 83A LTD ITEM 6 SELECTED FINANCIAL (2)INDEX TO FINANCIAL STATEM (2)Balance Sheet (5)Income Statement (7) STATEMENTS OF PARTNERS CAP (5)Cash Flows (6)NOTE 4 INCOME TAXES (4)! NOTE 5 OIL AND GAS PRODUC (10)! NOTE 5 OIL AND GAS PRODUC (11)! 16 PAGE 285 NOTE 6 RELATED PAR! 16 PAGE 285 NOTE 6 RELATED (1)!NOTE 7 OIL AND GAS INFORMATION  NOTE 7 OIL AND GAS INFORMA (1) NOTE 7 OIL AND GAS INFORMA (2)! 18 PAGE 287 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECU (2)Beneficial Ownership (2)PARKER PARSLEY 83A LTD (1)INDEX TO EXHIBITS (2)SELECTED FINANCIAL DATA (5) SUPPLEMENTAL INFORMATION T (6)PARKER PARSLEY 83B LTD ITEM 6 SELECTED FINANCIAL (3)INDEX TO FINANCIAL STATEM (3)Balance Sheet (6)Income Statement (8) STATEMENTS OF PARTNERS CAP (6)Cash Flows (7)NOTE 4 INCOME TAXES (5)! NOTE 5 OIL AND GAS PRODUC (12)! NOTE 5 OIL AND GAS PRODUC (13)! 16 PAGE 315 NOTE 6 RELATED PAR! 16 PAGE 315 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (3) NOTE 7 OIL AND GAS INFORMA (4) NOTE 7 OIL AND GAS INFORMA (5)!18 PAGE 317 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (3)Beneficial Ownership (3)PARKER PARSLEY 83B LTD (1)INDEX TO EXHIBITS (3)SELECTED FINANCIAL DATA (6) SUPPLEMENTAL INFORMATION T (7)PARKER PARSLEY 84A LTD ITEM 6 SELECTED FINANCIAL (4)INDEX TO FINANCIAL STATEM (4)Balance Sheet (7)Income Statement (9) STATEMENTS OF PARTNERS CAP (7)Cash Flows (8)!15 PAGE 344 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (14)! NOTE 5 OIL AND GAS PRODUC (15)! 16 PAGE 345 NOTE 6 RELATED PAR! 16 PAGE 345 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (6) NOTE 7 OIL AND GAS INFORMA (7) NOTE 7 OIL AND GAS INFORMA (8)!18 PAGE 347 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (4)Beneficial Ownership (4)PARKER PARSLEY 84A LTD (1)INDEX TO EXHIBITS (4)SELECTED FINANCIAL DATA (7) SUPPLEMENTAL INFORMATION T (8)PARKER PARSLEY 85A LTD ITEM 6 SELECTED FINANCIAL (5)INDEX TO FINANCIAL STATEM (5)Balance Sheet (8)Income Statement (10) STATEMENTS OF PARTNERS CAP (8)Cash Flows (9)NOTE 4 INCOME TAXES (6)! NOTE 5 OIL AND GAS PRODUC (16)! NOTE 5 OIL AND GAS PRODUC (17)! 16 PAGE 375 NOTE 6 RELATED PAR! 16 PAGE 375 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (9) NOTE 7 OIL AND GAS INFORM (10) NOTE 7 OIL AND GAS INFORM (11)!18 PAGE 377 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (5)Beneficial Ownership (5)PARKER PARSLEY 85A LTD (1)INDEX TO EXHIBITS (5)SELECTED FINANCIAL DATA (8) SUPPLEMENTAL INFORMATION T (9)PARKER PARSLEY 85B LTD ITEM 6 SELECTED FINANCIAL (6)!7 PAGE 396 ITEM 8 FINANCIAL STABalance Sheet (9) STATEMENTS OF PARTNERS CAP (9)Cash Flows (10)!15 PAGE 404 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (18)! NOTE 5 OIL AND GAS PRODUC (19)! 16 PAGE 405 NOTE 6 RELATED PAR! 16 PAGE 405 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (12) NOTE 7 OIL AND GAS INFORM (13) NOTE 7 OIL AND GAS INFORM (14)!18 PAGE 407 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (6)Beneficial Ownership (6)PARKER PARSLEY 85B LTD (1)INDEX TO EXHIBITS (6)SELECTED FINANCIAL DATA (9) SUPPLEMENTAL INFORMATION (10)Balance Sheet (10)Income Statement (11) STATEMENTS OF PARTNERS CA (10)Cash Flows (11)NOTE 4 INCOME TAXES (7)! NOTE 5 OIL AND GAS PRODUC (20)! NOTE 5 OIL AND GAS PRODUC (21)! 9 PAGE 428 NOTE 6 RELATED PART! 9 PAGE 428 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (15) NOTE 7 OIL AND GAS INFORM (16) NOTE 7 OIL AND GAS INFORM (17)! 11 PAGE 430 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (10) SUPPLEMENTAL INFORMATION (11)Balance Sheet (11)Income Statement (12) STATEMENTS OF PARTNERS CA (11)Cash Flows (12) 8 PAGE 446 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (22)! NOTE 5 OIL AND GAS PRODUC (23)! 9 PAGE 447 NOTE 6 RELATED PART! 9 PAGE 447 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (18) NOTE 7 OIL AND GAS INFORM (19) NOTE 7 OIL AND GAS INFORM (20)! 11 PAGE 449 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (11) SUPPLEMENTAL INFORMATION (12)PARKER PARSLEY 86A LTD ITEM 6 SELECTED FINANCIAL (7)INDEX TO FINANCIAL STATEM (6)Balance Sheet (12)Income Statement (13) STATEMENTS OF PARTNERS CA (12)Cash Flows (13)NOTE 4 INCOME TAXES (8)! NOTE 5 OIL AND GAS PRODUC (24)! NOTE 5 OIL AND GAS PRODUC (25)! 16 PAGE 473 NOTE 6 RELATED PAR! 16 PAGE 473 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (21) NOTE 7 OIL AND GAS INFORM (22) NOTE 7 OIL AND GAS INFORM (23)!18 PAGE 475 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (7)Beneficial Ownership (7)PARKER PARSLEY 86A LTD (1)INDEX TO EXHIBITS (7)SELECTED FINANCIAL DATA (12) SUPPLEMENTAL INFORMATION (13)PARKER PARSLEY 86B LTD ITEM 6 SELECTED FINANCIAL (8)INDEX TO FINANCIAL STATEM (7)Balance Sheet (13)Income Statement (14) STATEMENTS OF PARTNERS CA (13)Cash Flows (14)!16 PAGE 503 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (26)! NOTE 5 OIL AND GAS PRODUC (27)! NOTE 6 RELATED PARTY TRANS (4)! NOTE 6 RELATED PARTY TRANS (5) NOTE 7 OIL AND GAS INFORM (24) NOTE 7 OIL AND GAS INFORM (25) NOTE 7 OIL AND GAS INFORM (26)!19 PAGE 506 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (8)Beneficial Ownership (8)PARKER PARSLEY 86B LTD (1)INDEX TO EXHIBITS (8)SELECTED FINANCIAL DATA (13) SUPPLEMENTAL INFORMATION (14) ITEM 6 SELECTED FINANCIAL (9)!7 PAGE 525 ITEM 8 FINANCIAL STABalance Sheet (14)Income Statement (15) STATEMENTS OF PARTNERS CA (14)Cash Flows (15)NOTE 4 INCOME TAXES (9)! NOTE 5 OIL AND GAS PRODUC (28)! NOTE 5 OIL AND GAS PRODUC (29)! 16 PAGE 534 NOTE 6 RELATED PAR! 16 PAGE 534 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (27) NOTE 7 OIL AND GAS INFORM (28) NOTE 7 OIL AND GAS INFORM (29)!18 PAGE 536 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (9)Beneficial Ownership (9)PARKER PARSLEY 86C LTDSELECTED FINANCIAL DATA (14) SUPPLEMENTAL INFORMATION (15)Balance Sheet (15)Income Statement (16) STATEMENTS OF PARTNERS CA (15)Cash Flows (16) 8 PAGE 556 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (30)! NOTE 5 OIL AND GAS PRODUC (31)! NOTE 6 RELATED PARTY TRANS (6)! NOTE 6 RELATED PARTY TRANS (7) NOTE 7 OIL AND GAS INFORM (30) NOTE 7 OIL AND GAS INFORM (31) NOTE 7 OIL AND GAS INFORM (32)! 11 PAGE 559 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (15) SUPPLEMENTAL INFORMATION (16)Balance Sheet (16)Income Statement (17) STATEMENTS OF PARTNERS CA (16)Cash Flows (17)NOTE 4 INCOME TAXES (10)! NOTE 5 OIL AND GAS PRODUC (32)! NOTE 5 OIL AND GAS PRODUC (33)! 9 PAGE 576 NOTE 6 RELATED PART! 9 PAGE 576 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (33) NOTE 7 OIL AND GAS INFORM (34) NOTE 7 OIL AND GAS INFORM (35)!11 PAGE 578 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (16) SUPPLEMENTAL INFORMATION (17) ITEM 6 SELECTED FINANCIAL (10)!8 PAGE 594 ITEM 8 FINANCIAL STABalance Sheet (17)Income Statement (18) STATEMENTS OF PARTNERS CA (17)Cash Flows (18)NOTE 4 INCOME TAXES (11)! NOTE 5 OIL AND GAS PRODUC (34)! NOTE 5 OIL AND GAS PRODUC (35)! 17 PAGE 603 NOTE 6 RELATED PAR! 17 PAGE 603 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (36) NOTE 7 OIL AND GAS INFORM (37) NOTE 7 OIL AND GAS INFORM (38)! 19 PAGE 605 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (10)Beneficial Ownership (10)PARKER PARSLEY 87A LTDSELECTED FINANCIAL DATA (17) SUPPLEMENTAL INFORMATION (18)Balance Sheet (18)Income Statement (19) STATEMENTS OF PARTNERS CA (18)Cash Flows (19) 8 PAGE 625 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (36)! NOTE 5 OIL AND GAS PRODUC (37)! 9 PAGE 626 NOTE 6 RELATED PART! 9 PAGE 626 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (39) NOTE 7 OIL AND GAS INFORM (40) NOTE 7 OIL AND GAS INFORM (41)! 11 PAGE 628 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (18) SUPPLEMENTAL INFORMATION (19) ITEM 6 SELECTED FINANCIAL (11)INDEX TO FINANCIAL STATEM (8)Balance Sheet (19)Income Statement (20) STATEMENTS OF PARTNERS CA (19)Cash Flows (20)NOTE 4 INCOME TAXES (12)! NOTE 5 OIL AND GAS PRODUC (38)! NOTE 5 OIL AND GAS PRODUC (39)! 17 PAGE 653 NOTE 6 RELATED PAR! 17 PAGE 653 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (42) NOTE 7 OIL AND GAS INFORM (43) NOTE 7 OIL AND GAS INFORM (44)! 19 PAGE 655 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (11)Beneficial Ownership (11)PARKER PARSLEY 87B LTDINDEX TO EXHIBITS (9)SELECTED FINANCIAL DATA (19) SUPPLEMENTAL INFORMATION (20) ITEM 6 SELECTED FINANCIAL (12)INDEX TO FINANCIAL STATEM (9)Balance Sheet (20)Income Statement (21) STATEMENTS OF PARTNERS CA (20)Cash Flows (21)!16 PAGE 683 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (40)! NOTE 5 OIL AND GAS PRODUC (41)! NOTE 6 RELATED PARTY TRANS (8)! NOTE 6 RELATED PARTY TRANS (9) NOTE 7 OIL AND GAS INFORM (45) NOTE 7 OIL AND GAS INFORM (46) NOTE 7 OIL AND GAS INFORM (47)!19 PAGE 686 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (12)Beneficial Ownership (12)PROPERTIES 87A LTDINDEX TO EXHIBITS (10)SELECTED FINANCIAL DATA (20) SUPPLEMENTAL INFORMATION (21) ITEM 6 SELECTED FINANCIAL (13)INDEX TO FINANCIAL STATE (10)Balance Sheet (21)Income Statement (22) STATEMENTS OF PARTNERS CA (21)Cash Flows (22)!16 PAGE 714 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (42)! NOTE 5 OIL AND GAS PRODUC (43)! 17 PAGE 715 NOTE 6 RELATED PAR! 17 PAGE 715 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (48) NOTE 7 OIL AND GAS INFORM (49) NOTE 7 OIL AND GAS INFORM (50)! 19 PAGE 717 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (13)Beneficial Ownership (13)PROPERTIES 87B LTDINDEX TO EXHIBITS (11)SELECTED FINANCIAL DATA (21) SUPPLEMENTAL INFORMATION (22)Balance Sheet (22)Income Statement (23) STATEMENTS OF PARTNERS CA (22)Cash Flows (23) 8 PAGE 737 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (44)! NOTE 5 OIL AND GAS PRODUC (45)! 9 PAGE 738 NOTE 6 RELATED PART! 9 PAGE 738 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (51) NOTE 7 OIL AND GAS INFORM (52) NOTE 7 OIL AND GAS INFORM (53)! 11 PAGE 740 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (22) SUPPLEMENTAL INFORMATION (23)Balance Sheet (23)Income Statement (24) STATEMENTS OF PARTNERS CA (23)Cash Flows (24) 8 PAGE 756 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (46)! NOTE 5 OIL AND GAS PRODUC (47)! 9 PAGE 757 NOTE 6 RELATED PART! 9 PAGE 757 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (54) NOTE 7 OIL AND GAS INFORM (55) NOTE 7 OIL AND GAS INFORM (56)! 11 PAGE 759 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (23)!31 2000 1 PAGE 766 PARKER PARSLPARKER PARSLEY 88A LP ITEM 6 SELECTED FINANCIAL (14)INDEX TO FINANCIAL STATE (11)Balance Sheet (24)Income Statement (25) STATEMENTS OF PARTNERS CA (24)Cash Flows (25)NOTE 4 INCOME TAXES (13)! NOTE 5 OIL AND GAS PRODUC (48)! NOTE 5 OIL AND GAS PRODUC (49)! 16 PAGE 783 NOTE 6 RELATED PAR! 16 PAGE 783 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (57) NOTE 7 OIL AND GAS INFORM (58) NOTE 7 OIL AND GAS INFORM (59)! 18 PAGE 785 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (14)Beneficial Ownership (14)PARKER PARSLEY 88A LP (1)INDEX TO EXHIBITS (12)SELECTED FINANCIAL DATA (24) SUPPLEMENTAL INFORMATION (24)Balance Sheet (25)Income Statement (26) STATEMENTS OF PARTNERS CA (25)Cash Flows (26) 8 PAGE 805 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (50)! NOTE 5 OIL AND GAS PRODUC (51)! 9 PAGE 806 NOTE 6 RELATED PART! 9 PAGE 806 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (60) NOTE 7 OIL AND GAS INFORM (61) NOTE 7 OIL AND GAS INFORM (62)! 11 PAGE 808 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (25)!31 2000 1 PAGE 815 PARKER PARSLPARKER PARSLEY 88B LP ITEM 6 SELECTED FINANCIAL (15)INDEX TO FINANCIAL STATE (12)Balance Sheet (26)Income Statement (27) STATEMENTS OF PARTNERS CA (26)Cash Flows (27)!16 PAGE 832 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (52)! NOTE 5 OIL AND GAS PRODUC (53)! 17 PAGE 833 NOTE 6 RELATED PAR! 17 PAGE 833 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (63) NOTE 7 OIL AND GAS INFORM (64) NOTE 7 OIL AND GAS INFORM (65)! 19 PAGE 835 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (15)Beneficial Ownership (15)PARKER PARSLEY 88B LP (1)INDEX TO EXHIBITS (13)SELECTED FINANCIAL DATA (26) SUPPLEMENTAL INFORMATION (25)Balance Sheet (27)Income Statement (28) STATEMENTS OF PARTNERS CA (27)Cash Flows (28) 8 PAGE 855 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (54)! NOTE 5 OIL AND GAS PRODUC (55)! 9 PAGE 856 NOTE 6 RELATED PART! 9 PAGE 856 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (66) NOTE 7 OIL AND GAS INFORM (67) NOTE 7 OIL AND GAS INFORM (68)! 11 PAGE 858 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (27)!31 2000 1 PAGE 865 PARKER PARSLBalance Sheet (28)Income Statement (29) STATEMENTS OF PARTNERS CA (28)Cash Flows (29) 8 PAGE 874 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (56)! NOTE 5 OIL AND GAS PRODUC (57)! 9 PAGE 875 NOTE 6 RELATED PART! 9 PAGE 875 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (69) NOTE 7 OIL AND GAS INFORM (70) NOTE 7 OIL AND GAS INFORM (71)! 11 PAGE 877 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (28) SUPPLEMENTAL INFORMATION (26)!PARKER PARSLEY PRODUCING PROPER ITEM 6 SELECTED FINANCIAL (16)INDEX TO FINANCIAL STATE (13)Balance Sheet (29)Income Statement (30) STATEMENTS OF PARTNERS CA (29)Cash Flows (30)NOTE 4 INCOME TAXES (14)! NOTE 5 OIL AND GAS PRODUC (58)! NOTE 5 OIL AND GAS PRODUC (59)! 16 PAGE 901 NOTE 6 RELATED PAR! 16 PAGE 901 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (72) NOTE 7 OIL AND GAS INFORM (73)!18 PAGE 903 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (16)Beneficial Ownership (16)PROPERTIES 88A LPINDEX TO EXHIBITS (14)SELECTED FINANCIAL DATA (29) SUPPLEMENTAL INFORMATION (27)Balance Sheet (30)Income Statement (31) STATEMENTS OF PARTNERS CA (30)Cash Flows (31)NOTE 4 INCOME TAXES (15)! NOTE 5 OIL AND GAS PRODUC (60)! NOTE 5 OIL AND GAS PRODUC (61)! 9 PAGE 924 NOTE 6 RELATED PART! 9 PAGE 924 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (74) NOTE 7 OIL AND GAS INFORM (75) NOTE 7 OIL AND GAS INFORM (76)! 11 PAGE 926 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (30) SUPPLEMENTAL INFORMATION (28)Balance Sheet (31)Income Statement (32) STATEMENTS OF PARTNERS CA (31)Cash Flows (32)NOTE 4 INCOME TAXES (16)! NOTE 5 OIL AND GAS PRODUC (62)! NOTE 5 OIL AND GAS PRODUC (63)! 9 PAGE 943 NOTE 6 RELATED PART! 9 PAGE 943 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (77) NOTE 7 OIL AND GAS INFORM (78) NOTE 7 OIL AND GAS INFORM (79)!11 PAGE 945 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (31)!31 2000 1 PAGE 952 PARKER PARSLPARKER PARSLEY 89A LP ITEM 6 SELECTED FINANCIAL (17)INDEX TO FINANCIAL STATE (14)Balance Sheet (32)Income Statement (33) STATEMENTS OF PARTNERS CA (32)Cash Flows (33)NOTE 4 INCOME TAXES (17)! NOTE 5 OIL AND GAS PRODUC (64)! NOTE 5 OIL AND GAS PRODUC (65)! 16 PAGE 969 NOTE 6 RELATED PAR! 16 PAGE 969 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (80) NOTE 7 OIL AND GAS INFORM (81) NOTE 7 OIL AND GAS INFORM (82) NOTE 7 OIL AND GAS INFORM (83)! 18 PAGE 971 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (17)Beneficial Ownership (17)PARKER PARSLEY 89A LP (1)INDEX TO EXHIBITS (15)SELECTED FINANCIAL DATA (32) SUPPLEMENTAL INFORMATION (29)Balance Sheet (33)Income Statement (34) STATEMENTS OF PARTNERS CA (33)Cash Flows (34) 8 PAGE 991 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (66)! NOTE 5 OIL AND GAS PRODUC (67)! 9 PAGE 992 NOTE 6 RELATED PART! 9 PAGE 992 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (84) NOTE 7 OIL AND GAS INFORM (85) NOTE 7 OIL AND GAS INFORM (86)! 11 PAGE 994 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (33)!31 2000 1 PAGE 1001 PARKER PARSBalance Sheet (34)Income Statement (35) STATEMENTS OF PARTNERS CA (34)Cash Flows (35)!8 PAGE 1010 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (68)! NOTE 5 OIL AND GAS PRODUC (69)! 9 PAGE 1011 NOTE 6 RELATED PAR! 9 PAGE 1011 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (87) NOTE 7 OIL AND GAS INFORM (88) NOTE 7 OIL AND GAS INFORM (89)!11 PAGE 1013 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (34) SUPPLEMENTAL INFORMATION (30)Balance Sheet (35)Income Statement (36) STATEMENTS OF PARTNERS CA (35)Cash Flows (36)!8 PAGE 1029 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (70)! NOTE 5 OIL AND GAS PRODUC (71)! 9 PAGE 1030 NOTE 6 RELATED PAR! 9 PAGE 1030 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (90) NOTE 7 OIL AND GAS INFORM (91) NOTE 7 OIL AND GAS INFORM (92)! 11 PAGE 1032 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (35) SUPPLEMENTAL INFORMATION (31)Balance Sheet (36)Income Statement (37) STATEMENTS OF PARTNERS CA (36)Cash Flows (37)!8 PAGE 1048 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (72)! NOTE 5 OIL AND GAS PRODUC (73)! 9 PAGE 1049 NOTE 6 RELATED PAR! 9 PAGE 1049 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (93) NOTE 7 OIL AND GAS INFORM (94) NOTE 7 OIL AND GAS INFORM (95)! 11 PAGE 1051 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (36)!31 2000 1 PAGE 1058 PARKER PARSPARKER PARSLEY 90A LP ITEM 6 SELECTED FINANCIAL (18)INDEX TO FINANCIAL STATE (15)Balance Sheet (37)Income Statement (38) STATEMENTS OF PARTNERS CA (37)Cash Flows (38)!15 PAGE 1074 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (74)! NOTE 5 OIL AND GAS PRODUC (75)! NOTE 6 RELATED PARTY TRAN (10)! NOTE 6 RELATED PARTY TRAN (11) NOTE 7 OIL AND GAS INFORM (96) NOTE 7 OIL AND GAS INFORM (97)! 18 PAGE 1077 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (18)Beneficial Ownership (18)PARKER PARSLEY 90A LP (1)INDEX TO EXHIBITS (16)SELECTED FINANCIAL DATA (37) SUPPLEMENTAL INFORMATION (32)PARKER PARSLEY 90B CONV LP ITEM 6 SELECTED FINANCIAL (19)INDEX TO FINANCIAL STATE (16)Balance Sheet (38)Income Statement (39) STATEMENTS OF PARTNERS CA (38)Cash Flows (39)!16 PAGE 1105 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (76)! NOTE 5 OIL AND GAS PRODUC (77)! NOTE 6 RELATED PARTY TRAN (12)! NOTE 6 RELATED PARTY TRAN (13) NOTE 7 OIL AND GAS INFORM (98) NOTE 7 OIL AND GAS INFORM (99) NOTE 7 OIL AND GAS INFOR (100)! 19 PAGE 1108 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (19)Beneficial Ownership (19) PARKER PARSLEY 90B CONV LP (1)INDEX TO EXHIBITS (17)SELECTED FINANCIAL DATA (38)!31 2000 1 PAGE 1119 PARKER PARSPARKER PARSLEY 90B LP ITEM 6 SELECTED FINANCIAL (20)INDEX TO FINANCIAL STATE (17)Balance Sheet (39)Income Statement (40) STATEMENTS OF PARTNERS CA (39)Cash Flows (40)!16 PAGE 1136 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (78)! NOTE 5 OIL AND GAS PRODUC (79)! NOTE 6 RELATED PARTY TRAN (14)! NOTE 6 RELATED PARTY TRAN (15) NOTE 7 OIL AND GAS INFOR (101) NOTE 7 OIL AND GAS INFOR (102) NOTE 7 OIL AND GAS INFOR (103)! 19 PAGE 1139 NOTE 8 MAJOR CUS!ITEM 10 DIRECTORS AND EXEC (20)Beneficial Ownership (20)PARKER PARSLEY 90B LP (1)INDEX TO EXHIBITS (18)SELECTED FINANCIAL DATA (39) SUPPLEMENTAL INFORMATION (33)PARKER PARSLEY 90C CONV LP ITEM 6 SELECTED FINANCIAL (21)INDEX TO FINANCIAL STATE (18)Balance Sheet (40)Income Statement (41) STATEMENTS OF PARTNERS CA (40)Cash Flows (41)!15 PAGE 1166 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (80)! NOTE 5 OIL AND GAS PRODUC (81)! NOTE 6 RELATED PARTY TRAN (16)! NOTE 6 RELATED PARTY TRAN (17) NOTE 7 OIL AND GAS INFOR (104) NOTE 7 OIL AND GAS INFOR (105) NOTE 7 OIL AND GAS INFOR (106)! 18 PAGE 1169 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (21)Beneficial Ownership (21) PARKER PARSLEY 90C CONV LP (1)INDEX TO EXHIBITS (19)SELECTED FINANCIAL DATA (40)!31 2000 1 PAGE 1180 PARKER PARSPARKER PARSLEY 90C LP ITEM 6 SELECTED FINANCIAL (22)INDEX TO FINANCIAL STATE (19)Balance Sheet (41)Income Statement (42) STATEMENTS OF PARTNERS CA (41)Cash Flows (42)!15 PAGE 1196 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (82)! NOTE 5 OIL AND GAS PRODUC (83)! NOTE 6 RELATED PARTY TRAN (18)! NOTE 6 RELATED PARTY TRAN (19) NOTE 7 OIL AND GAS INFOR (107) NOTE 7 OIL AND GAS INFOR (108) NOTE 7 OIL AND GAS INFOR (109)! 18 PAGE 1199 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (22)Beneficial Ownership (22)PARKER PARSLEY 90C LP (1)INDEX TO EXHIBITS (20)SELECTED FINANCIAL DATA (41) SUPPLEMENTAL INFORMATION (34)Balance Sheet (42)Income Statement (43) STATEMENTS OF PARTNERS CA (42)Cash Flows (43)!8 PAGE 1219 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (84)! NOTE 5 OIL AND GAS PRODUC (85)! 9 PAGE 1220 NOTE 6 RELATED PAR! 9 PAGE 1220 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (110) NOTE 7 OIL AND GAS INFOR (111) NOTE 7 OIL AND GAS INFOR (112)! 11 PAGE 1222 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (42) SUPPLEMENTAL INFORMATION (35)Balance Sheet (43)Income Statement (44) STATEMENTS OF PARTNERS CA (43)Cash Flows (44)!8 PAGE 1238 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (86)! NOTE 5 OIL AND GAS PRODUC (87)! 9 PAGE 1239 NOTE 6 RELATED PAR! 9 PAGE 1239 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (113) NOTE 7 OIL AND GAS INFOR (114) NOTE 7 OIL AND GAS INFOR (115)! 11 PAGE 1241 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (43)!31 2000 1 PAGE 1248 PARKER PARSPARKER PARSLEY 91A LP ITEM 6 SELECTED FINANCIAL (23)INDEX TO FINANCIAL STATE (20)Balance Sheet (44)Income Statement (45) STATEMENTS OF PARTNERS CA (44)Cash Flows (45)!15 PAGE 1264 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (88)! NOTE 5 OIL AND GAS PRODUC (89)! NOTE 6 RELATED PARTY TRAN (20)! NOTE 6 RELATED PARTY TRAN (21) NOTE 7 OIL AND GAS INFOR (116) NOTE 7 OIL AND GAS INFOR (117) NOTE 7 OIL AND GAS INFOR (118)! 18 PAGE 1267 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (23)Beneficial Ownership (23)PARKER PARSLEY 91A LP (1)INDEX TO EXHIBITS (21)SELECTED FINANCIAL DATA (44)!31 2000 1 PAGE 1278 PARKER PARSPARKER PARSLEY 91B LP ITEM 6 SELECTED FINANCIAL (24)INDEX TO FINANCIAL STATE (21)Balance Sheet (45)Income Statement (46) STATEMENTS OF PARTNERS CA (45)Cash Flows (46)!15 PAGE 1294 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (90)! NOTE 5 OIL AND GAS PRODUC (91)! NOTE 6 RELATED PARTY TRAN (22)! NOTE 6 RELATED PARTY TRAN (23) NOTE 7 OIL AND GAS INFOR (119) NOTE 7 OIL AND GAS INFOR (120) NOTE 7 OIL AND GAS INFOR (121)! 18 PAGE 1297 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (24)Beneficial Ownership (24)PARKER PARSLEY 91B LP (1)INDEX TO EXHIBITS (22)SELECTED FINANCIAL DATA (45)POWER OF ATTORNEYPOWER OF ATTORNEY (1)POWER OF ATTORNEY (2)POWER OF ATTORNEY (3)POWER OF ATTORNEY (4)POWER OF ATTORNEY (5)POWER OF ATTORNEY (6)POWER OF ATTORNEY (7)!2001 THE BOARD OF DIRECTORS REC!2001 THE BOARD OF DIRECTORS (1)!2001 THE BOARD OF DIRECTORS (2)PAGE 2U } $} } mB     $PIONEER NATURAL RESOURCES CO S-4 04/17/2001PIONEER NAME AGE POSITION   Scott D. Sheffield~ ?7Chairman of the Board of Directors, President and ChiefExecutive OfficerTimothy L. Dove~ <4Executive Vice President and Chief Financial OfficerDennis E. Fagerstone~  Executive Vice PresidentMark L. Withrow~ ?7Executive Vice President, General Counsel and SecretaryDanny L. Kellum~  Executive Vice PresidentJames R. Baroffio~ DirectorR. Hartwell Gardner~  DirectorJames L. Houghton~ DirectorJerry P. Jones~ DirectorCharles E. Ramsey, Jr.~ DirectorRobert L. Stillwell~ Director$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/@D|pd1%iBu6ui]5=PF0*8X> @ l   dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/?? SECURITIES AND EXC!CALCULATION OF REGISTRATION FEETO BE HELD ON 2001TABLE OF CONTENTSPAGE 7 LIST OF APPENDICES!LIMITED PARTNER INVESTMENT REPA!LIMITED PARTNER INVESTMENT (1) 5 PAGE 15 NYMEX FUTURES PRICES!EXAMPLE CALCULATION OF MERGER VIncome StatementIncome Statement (1)AT DECEMBER 31 2000!15 PAGE 25 COMPARATIVE PER SHAR!25 PAGE 35 REASONS FOR THE MERGFAIRNESS OPINIONFAIRNESS OPINION (1)!LEGAL OPINION FOR LIMITED PARTN!LEGAL OPINION FOR LIMITED P (1)!NONMANAGING GENERAL PARTNERS OF!49 PAGE 59 PAYMENT OF EXPENSES !58 PAGE 68 COMPARATIVE PER SHAR!60 PAGE 70 OWNERSHIP OF PARTNER PIONEERTHE DRILLING PARTNERSHIPSTHE DRILLING PARTNERSHIPS (1)THE INCOME PARTNERSHIPS INTERESTSINTERESTS (1)INTERESTS (2)INTERESTS (3)INTERESTS (4)INTERESTS (5)!WHERE YOU CAN FIND MORE INFORMAAS OF DECEMBER 31 2000YEAR ENDED DECEMBER 31 2000!QUANTITIES OF OIL AND GAS RESER!STANDARDIZED MEASURE OF DISCOUN CASH FLOWSAS OF MARCH 31 2001AS OF MARCH 31 2001 (1)AS OF MARCH 31 2001 (2)AS OF MARCH 31 2001 (3)AS OF MARCH 31 2001 (4)AS OF MARCH 31 2001 (5)!FROM INCEPTION THROUGH MARCH 31!ANNUAL REPURCHASE PRICES AND AGOF EACH PARTNERSHIP!FOR THE THREE MONTHS ENDED MARCAS OF DECEMBER 31 2000 (1)AS OF MARCH 31 2001 (6)!THE YEARS ENDED DECEMBER 31 200AS OF DECEMBER 31 2000 (2)DECEMBER 31 2000 AND 1999EFFECTIVE DECEMBER 31 2000 EFFECTIVE DECEMBER 31 2000 (1) RECITALS RECITALS (1) SUPPLEMENTAL INFORMATION TABLEBalance SheetIncome Statement (2) STATEMENTS OF PARTNERS CAPITALCash Flows (1)NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCING A! NOTE 5 OIL AND GAS PRODUCI (1)! NOTE 6 RELATED PARTY TRANSACTI! NOTE 6 RELATED PARTY TRANS (1)! NOTE 7 OIL AND GAS INFORMATION! NOTE 7 OIL AND GAS INFORMA (1)! NOTE 7 OIL AND GAS INFORMA (2)!11 PAGE 163 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA SUPPLEMENTAL INFORMATION T (1)Balance Sheet (1)Income Statement (3) STATEMENTS OF PARTNERS CAP (1)Cash Flows (2)NOTE 4 INCOME TAXES (1)! NOTE 5 OIL AND GAS PRODUCI (2)! NOTE 5 OIL AND GAS PRODUCI (3)! 9 PAGE 180 NOTE 6 RELATED PAR! 9 PAGE 180 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORMA (3)! NOTE 7 OIL AND GAS INFORMA (4)! NOTE 7 OIL AND GAS INFORMA (5)!11 PAGE 182 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (1) SUPPLEMENTAL INFORMATION T (2) ITEM 6 SELECTED FINANCIAL DATAINDEX TO FINANCIAL STATEMENTSBalance Sheet (2)Income Statement (4) STATEMENTS OF PARTNERS CAP (2)Cash Flows (3)!15 PAGE 205 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCI (4)! NOTE 5 OIL AND GAS PRODUCI (5)! NOTE 6 RELATED PARTY TRANS (2)! NOTE 6 RELATED PARTY TRANS (3)! NOTE 7 OIL AND GAS INFORMA (6)! NOTE 7 OIL AND GAS INFORMA (7)! NOTE 7 OIL AND GAS INFORMA (8)! NOTE 7 OIL AND GAS INFORMA (9)! NOTE 7 OIL AND GAS INFORM (10)! 18 PAGE 208 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECUTIVEBeneficial OwnershipPARKER PARSLEY 82I LTDINDEX TO EXHIBITSSELECTED FINANCIAL DATA (2) SUPPLEMENTAL INFORMATION T (3) ITEM 6 SELECTED FINANCIAL (1)INDEX TO FINANCIAL STATEM (1)Balance Sheet (3)Income Statement (5) STATEMENTS OF PARTNERS CAP (3)Cash Flows (4)NOTE 4 INCOME TAXES (2)! NOTE 5 OIL AND GAS PRODUCI (6)! NOTE 5 OIL AND GAS PRODUCI (7)! 16 PAGE 236 NOTE 6 RELATED PAR! 16 PAGE 236 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (11)! NOTE 7 OIL AND GAS INFORM (12)! NOTE 7 OIL AND GAS INFORM (13)!18 PAGE 238 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (1)Beneficial Ownership (1)PARKER PARSLEY 82II LTDINDEX TO EXHIBITS (1)SELECTED FINANCIAL DATA (3) SUPPLEMENTAL INFORMATION T (4)Balance Sheet (4)Income Statement (6) STATEMENTS OF PARTNERS CAP (4)Cash Flows (5)NOTE 4 INCOME TAXES (3)! NOTE 5 OIL AND GAS PRODUCI (8)! NOTE 5 OIL AND GAS PRODUCI (9)! 9 PAGE 259 NOTE 6 RELATED PART! 9 PAGE 259 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (14)! NOTE 7 OIL AND GAS INFORM (15)! NOTE 7 OIL AND GAS INFORM (16)!11 PAGE 261 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (4) SUPPLEMENTAL INFORMATION T (5)PARKER PARSLEY 83A LTD ITEM 6 SELECTED FINANCIAL (2)INDEX TO FINANCIAL STATEM (2)Balance Sheet (5)Income Statement (7) STATEMENTS OF PARTNERS CAP (5)Cash Flows (6)NOTE 4 INCOME TAXES (4)! NOTE 5 OIL AND GAS PRODUC (10)! NOTE 5 OIL AND GAS PRODUC (11)! 16 PAGE 285 NOTE 6 RELATED PAR! 16 PAGE 285 NOTE 6 RELATED (1)!NOTE 7 OIL AND GAS INFORMATION  NOTE 7 OIL AND GAS INFORMA (1) NOTE 7 OIL AND GAS INFORMA (2)! 18 PAGE 287 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECU (2)Beneficial Ownership (2)PARKER PARSLEY 83A LTD (1)INDEX TO EXHIBITS (2)SELECTED FINANCIAL DATA (5) SUPPLEMENTAL INFORMATION T (6)PARKER PARSLEY 83B LTD ITEM 6 SELECTED FINANCIAL (3)INDEX TO FINANCIAL STATEM (3)Balance Sheet (6)Income Statement (8) STATEMENTS OF PARTNERS CAP (6)Cash Flows (7)NOTE 4 INCOME TAXES (5)! NOTE 5 OIL AND GAS PRODUC (12)! NOTE 5 OIL AND GAS PRODUC (13)! 16 PAGE 315 NOTE 6 RELATED PAR! 16 PAGE 315 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (3) NOTE 7 OIL AND GAS INFORMA (4) NOTE 7 OIL AND GAS INFORMA (5)!18 PAGE 317 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (3)Beneficial Ownership (3)PARKER PARSLEY 83B LTD (1)INDEX TO EXHIBITS (3)SELECTED FINANCIAL DATA (6) SUPPLEMENTAL INFORMATION T (7)PARKER PARSLEY 84A LTD ITEM 6 SELECTED FINANCIAL (4)INDEX TO FINANCIAL STATEM (4)Balance Sheet (7)Income Statement (9) STATEMENTS OF PARTNERS CAP (7)Cash Flows (8)!15 PAGE 344 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (14)! NOTE 5 OIL AND GAS PRODUC (15)! 16 PAGE 345 NOTE 6 RELATED PAR! 16 PAGE 345 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (6) NOTE 7 OIL AND GAS INFORMA (7) NOTE 7 OIL AND GAS INFORMA (8)!18 PAGE 347 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (4)Beneficial Ownership (4)PARKER PARSLEY 84A LTD (1)INDEX TO EXHIBITS (4)SELECTED FINANCIAL DATA (7) SUPPLEMENTAL INFORMATION T (8)PARKER PARSLEY 85A LTD ITEM 6 SELECTED FINANCIAL (5)INDEX TO FINANCIAL STATEM (5)Balance Sheet (8)Income Statement (10) STATEMENTS OF PARTNERS CAP (8)Cash Flows (9)NOTE 4 INCOME TAXES (6)! NOTE 5 OIL AND GAS PRODUC (16)! NOTE 5 OIL AND GAS PRODUC (17)! 16 PAGE 375 NOTE 6 RELATED PAR! 16 PAGE 375 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (9) NOTE 7 OIL AND GAS INFORM (10) NOTE 7 OIL AND GAS INFORM (11)!18 PAGE 377 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (5)Beneficial Ownership (5)PARKER PARSLEY 85A LTD (1)INDEX TO EXHIBITS (5)SELECTED FINANCIAL DATA (8) SUPPLEMENTAL INFORMATION T (9)PARKER PARSLEY 85B LTD ITEM 6 SELECTED FINANCIAL (6)!7 PAGE 396 ITEM 8 FINANCIAL STABalance Sheet (9) STATEMENTS OF PARTNERS CAP (9)Cash Flows (10)!15 PAGE 404 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (18)! NOTE 5 OIL AND GAS PRODUC (19)! 16 PAGE 405 NOTE 6 RELATED PAR! 16 PAGE 405 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (12) NOTE 7 OIL AND GAS INFORM (13) NOTE 7 OIL AND GAS INFORM (14)!18 PAGE 407 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (6)Beneficial Ownership (6)PARKER PARSLEY 85B LTD (1)INDEX TO EXHIBITS (6)SELECTED FINANCIAL DATA (9) SUPPLEMENTAL INFORMATION (10)Balance Sheet (10)Income Statement (11) STATEMENTS OF PARTNERS CA (10)Cash Flows (11)NOTE 4 INCOME TAXES (7)! NOTE 5 OIL AND GAS PRODUC (20)! NOTE 5 OIL AND GAS PRODUC (21)! 9 PAGE 428 NOTE 6 RELATED PART! 9 PAGE 428 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (15) NOTE 7 OIL AND GAS INFORM (16) NOTE 7 OIL AND GAS INFORM (17)! 11 PAGE 430 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (10) SUPPLEMENTAL INFORMATION (11)Balance Sheet (11)Income Statement (12) STATEMENTS OF PARTNERS CA (11)Cash Flows (12) 8 PAGE 446 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (22)! NOTE 5 OIL AND GAS PRODUC (23)! 9 PAGE 447 NOTE 6 RELATED PART! 9 PAGE 447 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (18) NOTE 7 OIL AND GAS INFORM (19) NOTE 7 OIL AND GAS INFORM (20)! 11 PAGE 449 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (11) SUPPLEMENTAL INFORMATION (12)PARKER PARSLEY 86A LTD ITEM 6 SELECTED FINANCIAL (7)INDEX TO FINANCIAL STATEM (6)Balance Sheet (12)Income Statement (13) STATEMENTS OF PARTNERS CA (12)Cash Flows (13)NOTE 4 INCOME TAXES (8)! NOTE 5 OIL AND GAS PRODUC (24)! NOTE 5 OIL AND GAS PRODUC (25)! 16 PAGE 473 NOTE 6 RELATED PAR! 16 PAGE 473 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (21) NOTE 7 OIL AND GAS INFORM (22) NOTE 7 OIL AND GAS INFORM (23)!18 PAGE 475 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (7)Beneficial Ownership (7)PARKER PARSLEY 86A LTD (1)INDEX TO EXHIBITS (7)SELECTED FINANCIAL DATA (12) SUPPLEMENTAL INFORMATION (13)PARKER PARSLEY 86B LTD ITEM 6 SELECTED FINANCIAL (8)INDEX TO FINANCIAL STATEM (7)Balance Sheet (13)Income Statement (14) STATEMENTS OF PARTNERS CA (13)Cash Flows (14)!16 PAGE 503 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (26)! NOTE 5 OIL AND GAS PRODUC (27)! NOTE 6 RELATED PARTY TRANS (4)! NOTE 6 RELATED PARTY TRANS (5) NOTE 7 OIL AND GAS INFORM (24) NOTE 7 OIL AND GAS INFORM (25) NOTE 7 OIL AND GAS INFORM (26)!19 PAGE 506 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (8)Beneficial Ownership (8)PARKER PARSLEY 86B LTD (1)INDEX TO EXHIBITS (8)SELECTED FINANCIAL DATA (13) SUPPLEMENTAL INFORMATION (14) ITEM 6 SELECTED FINANCIAL (9)!7 PAGE 525 ITEM 8 FINANCIAL STABalance Sheet (14)Income Statement (15) STATEMENTS OF PARTNERS CA (14)Cash Flows (15)NOTE 4 INCOME TAXES (9)! NOTE 5 OIL AND GAS PRODUC (28)! NOTE 5 OIL AND GAS PRODUC (29)! 16 PAGE 534 NOTE 6 RELATED PAR! 16 PAGE 534 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (27) NOTE 7 OIL AND GAS INFORM (28) NOTE 7 OIL AND GAS INFORM (29)!18 PAGE 536 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (9)Beneficial Ownership (9)PARKER PARSLEY 86C LTDSELECTED FINANCIAL DATA (14) SUPPLEMENTAL INFORMATION (15)Balance Sheet (15)Income Statement (16) STATEMENTS OF PARTNERS CA (15)Cash Flows (16) 8 PAGE 556 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (30)! NOTE 5 OIL AND GAS PRODUC (31)! NOTE 6 RELATED PARTY TRANS (6)! NOTE 6 RELATED PARTY TRANS (7) NOTE 7 OIL AND GAS INFORM (30) NOTE 7 OIL AND GAS INFORM (31) NOTE 7 OIL AND GAS INFORM (32)! 11 PAGE 559 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (15) SUPPLEMENTAL INFORMATION (16)Balance Sheet (16)Income Statement (17) STATEMENTS OF PARTNERS CA (16)Cash Flows (17)NOTE 4 INCOME TAXES (10)! NOTE 5 OIL AND GAS PRODUC (32)! NOTE 5 OIL AND GAS PRODUC (33)! 9 PAGE 576 NOTE 6 RELATED PART! 9 PAGE 576 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (33) NOTE 7 OIL AND GAS INFORM (34) NOTE 7 OIL AND GAS INFORM (35)!11 PAGE 578 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (16) SUPPLEMENTAL INFORMATION (17) ITEM 6 SELECTED FINANCIAL (10)!8 PAGE 594 ITEM 8 FINANCIAL STABalance Sheet (17)Income Statement (18) STATEMENTS OF PARTNERS CA (17)Cash Flows (18)NOTE 4 INCOME TAXES (11)! NOTE 5 OIL AND GAS PRODUC (34)! NOTE 5 OIL AND GAS PRODUC (35)! 17 PAGE 603 NOTE 6 RELATED PAR! 17 PAGE 603 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (36) NOTE 7 OIL AND GAS INFORM (37) NOTE 7 OIL AND GAS INFORM (38)! 19 PAGE 605 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (10)Beneficial Ownership (10)PARKER PARSLEY 87A LTDSELECTED FINANCIAL DATA (17) SUPPLEMENTAL INFORMATION (18)Balance Sheet (18)Income Statement (19) STATEMENTS OF PARTNERS CA (18)Cash Flows (19) 8 PAGE 625 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (36)! NOTE 5 OIL AND GAS PRODUC (37)! 9 PAGE 626 NOTE 6 RELATED PART! 9 PAGE 626 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (39) NOTE 7 OIL AND GAS INFORM (40) NOTE 7 OIL AND GAS INFORM (41)! 11 PAGE 628 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (18) SUPPLEMENTAL INFORMATION (19) ITEM 6 SELECTED FINANCIAL (11)INDEX TO FINANCIAL STATEM (8)Balance Sheet (19)Income Statement (20) STATEMENTS OF PARTNERS CA (19)Cash Flows (20)NOTE 4 INCOME TAXES (12)! NOTE 5 OIL AND GAS PRODUC (38)! NOTE 5 OIL AND GAS PRODUC (39)! 17 PAGE 653 NOTE 6 RELATED PAR! 17 PAGE 653 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (42) NOTE 7 OIL AND GAS INFORM (43) NOTE 7 OIL AND GAS INFORM (44)! 19 PAGE 655 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (11)Beneficial Ownership (11)PARKER PARSLEY 87B LTDINDEX TO EXHIBITS (9)SELECTED FINANCIAL DATA (19) SUPPLEMENTAL INFORMATION (20) ITEM 6 SELECTED FINANCIAL (12)INDEX TO FINANCIAL STATEM (9)Balance Sheet (20)Income Statement (21) STATEMENTS OF PARTNERS CA (20)Cash Flows (21)!16 PAGE 683 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (40)! NOTE 5 OIL AND GAS PRODUC (41)! NOTE 6 RELATED PARTY TRANS (8)! NOTE 6 RELATED PARTY TRANS (9) NOTE 7 OIL AND GAS INFORM (45) NOTE 7 OIL AND GAS INFORM (46) NOTE 7 OIL AND GAS INFORM (47)!19 PAGE 686 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (12)Beneficial Ownership (12)PROPERTIES 87A LTDINDEX TO EXHIBITS (10)SELECTED FINANCIAL DATA (20) SUPPLEMENTAL INFORMATION (21) ITEM 6 SELECTED FINANCIAL (13)INDEX TO FINANCIAL STATE (10)Balance Sheet (21)Income Statement (22) STATEMENTS OF PARTNERS CA (21)Cash Flows (22)!16 PAGE 714 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (42)! NOTE 5 OIL AND GAS PRODUC (43)! 17 PAGE 715 NOTE 6 RELATED PAR! 17 PAGE 715 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (48) NOTE 7 OIL AND GAS INFORM (49) NOTE 7 OIL AND GAS INFORM (50)! 19 PAGE 717 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (13)Beneficial Ownership (13)PROPERTIES 87B LTDINDEX TO EXHIBITS (11)SELECTED FINANCIAL DATA (21) SUPPLEMENTAL INFORMATION (22)Balance Sheet (22)Income Statement (23) STATEMENTS OF PARTNERS CA (22)Cash Flows (23) 8 PAGE 737 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (44)! NOTE 5 OIL AND GAS PRODUC (45)! 9 PAGE 738 NOTE 6 RELATED PART! 9 PAGE 738 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (51) NOTE 7 OIL AND GAS INFORM (52) NOTE 7 OIL AND GAS INFORM (53)! 11 PAGE 740 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (22) SUPPLEMENTAL INFORMATION (23)Balance Sheet (23)Income Statement (24) STATEMENTS OF PARTNERS CA (23)Cash Flows (24) 8 PAGE 756 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (46)! NOTE 5 OIL AND GAS PRODUC (47)! 9 PAGE 757 NOTE 6 RELATED PART! 9 PAGE 757 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (54) NOTE 7 OIL AND GAS INFORM (55) NOTE 7 OIL AND GAS INFORM (56)! 11 PAGE 759 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (23)!31 2000 1 PAGE 766 PARKER PARSLPARKER PARSLEY 88A LP ITEM 6 SELECTED FINANCIAL (14)INDEX TO FINANCIAL STATE (11)Balance Sheet (24)Income Statement (25) STATEMENTS OF PARTNERS CA (24)Cash Flows (25)NOTE 4 INCOME TAXES (13)! NOTE 5 OIL AND GAS PRODUC (48)! NOTE 5 OIL AND GAS PRODUC (49)! 16 PAGE 783 NOTE 6 RELATED PAR! 16 PAGE 783 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (57) NOTE 7 OIL AND GAS INFORM (58) NOTE 7 OIL AND GAS INFORM (59)! 18 PAGE 785 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (14)Beneficial Ownership (14)PARKER PARSLEY 88A LP (1)INDEX TO EXHIBITS (12)SELECTED FINANCIAL DATA (24) SUPPLEMENTAL INFORMATION (24)Balance Sheet (25)Income Statement (26) STATEMENTS OF PARTNERS CA (25)Cash Flows (26) 8 PAGE 805 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (50)! NOTE 5 OIL AND GAS PRODUC (51)! 9 PAGE 806 NOTE 6 RELATED PART! 9 PAGE 806 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (60) NOTE 7 OIL AND GAS INFORM (61) NOTE 7 OIL AND GAS INFORM (62)! 11 PAGE 808 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (25)!31 2000 1 PAGE 815 PARKER PARSLPARKER PARSLEY 88B LP ITEM 6 SELECTED FINANCIAL (15)INDEX TO FINANCIAL STATE (12)Balance Sheet (26)Income Statement (27) STATEMENTS OF PARTNERS CA (26)Cash Flows (27)!16 PAGE 832 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (52)! NOTE 5 OIL AND GAS PRODUC (53)! 17 PAGE 833 NOTE 6 RELATED PAR! 17 PAGE 833 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (63) NOTE 7 OIL AND GAS INFORM (64) NOTE 7 OIL AND GAS INFORM (65)! 19 PAGE 835 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (15)Beneficial Ownership (15)PARKER PARSLEY 88B LP (1)INDEX TO EXHIBITS (13)SELECTED FINANCIAL DATA (26) SUPPLEMENTAL INFORMATION (25)Balance Sheet (27)Income Statement (28) STATEMENTS OF PARTNERS CA (27)Cash Flows (28) 8 PAGE 855 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (54)! NOTE 5 OIL AND GAS PRODUC (55)! 9 PAGE 856 NOTE 6 RELATED PART! 9 PAGE 856 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (66) NOTE 7 OIL AND GAS INFORM (67) NOTE 7 OIL AND GAS INFORM (68)! 11 PAGE 858 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (27)!31 2000 1 PAGE 865 PARKER PARSLBalance Sheet (28)Income Statement (29) STATEMENTS OF PARTNERS CA (28)Cash Flows (29) 8 PAGE 874 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (56)! NOTE 5 OIL AND GAS PRODUC (57)! 9 PAGE 875 NOTE 6 RELATED PART! 9 PAGE 875 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (69) NOTE 7 OIL AND GAS INFORM (70) NOTE 7 OIL AND GAS INFORM (71)! 11 PAGE 877 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (28) SUPPLEMENTAL INFORMATION (26)!PARKER PARSLEY PRODUCING PROPER ITEM 6 SELECTED FINANCIAL (16)INDEX TO FINANCIAL STATE (13)Balance Sheet (29)Income Statement (30) STATEMENTS OF PARTNERS CA (29)Cash Flows (30)NOTE 4 INCOME TAXES (14)! NOTE 5 OIL AND GAS PRODUC (58)! NOTE 5 OIL AND GAS PRODUC (59)! 16 PAGE 901 NOTE 6 RELATED PAR! 16 PAGE 901 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (72) NOTE 7 OIL AND GAS INFORM (73)!18 PAGE 903 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (16)Beneficial Ownership (16)PROPERTIES 88A LPINDEX TO EXHIBITS (14)SELECTED FINANCIAL DATA (29) SUPPLEMENTAL INFORMATION (27)Balance Sheet (30)Income Statement (31) STATEMENTS OF PARTNERS CA (30)Cash Flows (31)NOTE 4 INCOME TAXES (15)! NOTE 5 OIL AND GAS PRODUC (60)! NOTE 5 OIL AND GAS PRODUC (61)! 9 PAGE 924 NOTE 6 RELATED PART! 9 PAGE 924 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (74) NOTE 7 OIL AND GAS INFORM (75) NOTE 7 OIL AND GAS INFORM (76)! 11 PAGE 926 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (30) SUPPLEMENTAL INFORMATION (28)Balance Sheet (31)Income Statement (32) STATEMENTS OF PARTNERS CA (31)Cash Flows (32)NOTE 4 INCOME TAXES (16)! NOTE 5 OIL AND GAS PRODUC (62)! NOTE 5 OIL AND GAS PRODUC (63)! 9 PAGE 943 NOTE 6 RELATED PART! 9 PAGE 943 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (77) NOTE 7 OIL AND GAS INFORM (78) NOTE 7 OIL AND GAS INFORM (79)!11 PAGE 945 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (31)!31 2000 1 PAGE 952 PARKER PARSLPARKER PARSLEY 89A LP ITEM 6 SELECTED FINANCIAL (17)INDEX TO FINANCIAL STATE (14)Balance Sheet (32)Income Statement (33) STATEMENTS OF PARTNERS CA (32)Cash Flows (33)NOTE 4 INCOME TAXES (17)! NOTE 5 OIL AND GAS PRODUC (64)! NOTE 5 OIL AND GAS PRODUC (65)! 16 PAGE 969 NOTE 6 RELATED PAR! 16 PAGE 969 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (80) NOTE 7 OIL AND GAS INFORM (81) NOTE 7 OIL AND GAS INFORM (82) NOTE 7 OIL AND GAS INFORM (83)! 18 PAGE 971 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (17)Beneficial Ownership (17)PARKER PARSLEY 89A LP (1)INDEX TO EXHIBITS (15)SELECTED FINANCIAL DATA (32) SUPPLEMENTAL INFORMATION (29)Balance Sheet (33)Income Statement (34) STATEMENTS OF PARTNERS CA (33)Cash Flows (34) 8 PAGE 991 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (66)! NOTE 5 OIL AND GAS PRODUC (67)! 9 PAGE 992 NOTE 6 RELATED PART! 9 PAGE 992 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (84) NOTE 7 OIL AND GAS INFORM (85) NOTE 7 OIL AND GAS INFORM (86)! 11 PAGE 994 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (33)!31 2000 1 PAGE 1001 PARKER PARSBalance Sheet (34)Income Statement (35) STATEMENTS OF PARTNERS CA (34)Cash Flows (35)!8 PAGE 1010 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (68)! NOTE 5 OIL AND GAS PRODUC (69)! 9 PAGE 1011 NOTE 6 RELATED PAR! 9 PAGE 1011 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (87) NOTE 7 OIL AND GAS INFORM (88) NOTE 7 OIL AND GAS INFORM (89)!11 PAGE 1013 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (34) SUPPLEMENTAL INFORMATION (30)Balance Sheet (35)Income Statement (36) STATEMENTS OF PARTNERS CA (35)Cash Flows (36)!8 PAGE 1029 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (70)! NOTE 5 OIL AND GAS PRODUC (71)! 9 PAGE 1030 NOTE 6 RELATED PAR! 9 PAGE 1030 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (90) NOTE 7 OIL AND GAS INFORM (91) NOTE 7 OIL AND GAS INFORM (92)! 11 PAGE 1032 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (35) SUPPLEMENTAL INFORMATION (31)Balance Sheet (36)Income Statement (37) STATEMENTS OF PARTNERS CA (36)Cash Flows (37)!8 PAGE 1048 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (72)! NOTE 5 OIL AND GAS PRODUC (73)! 9 PAGE 1049 NOTE 6 RELATED PAR! 9 PAGE 1049 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (93) NOTE 7 OIL AND GAS INFORM (94) NOTE 7 OIL AND GAS INFORM (95)! 11 PAGE 1051 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (36)!31 2000 1 PAGE 1058 PARKER PARSPARKER PARSLEY 90A LP ITEM 6 SELECTED FINANCIAL (18)INDEX TO FINANCIAL STATE (15)Balance Sheet (37)Income Statement (38) STATEMENTS OF PARTNERS CA (37)Cash Flows (38)!15 PAGE 1074 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (74)! NOTE 5 OIL AND GAS PRODUC (75)! NOTE 6 RELATED PARTY TRAN (10)! NOTE 6 RELATED PARTY TRAN (11) NOTE 7 OIL AND GAS INFORM (96) NOTE 7 OIL AND GAS INFORM (97)! 18 PAGE 1077 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (18)Beneficial Ownership (18)PARKER PARSLEY 90A LP (1)INDEX TO EXHIBITS (16)SELECTED FINANCIAL DATA (37) SUPPLEMENTAL INFORMATION (32)PARKER PARSLEY 90B CONV LP ITEM 6 SELECTED FINANCIAL (19)INDEX TO FINANCIAL STATE (16)Balance Sheet (38)Income Statement (39) STATEMENTS OF PARTNERS CA (38)Cash Flows (39)!16 PAGE 1105 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (76)! NOTE 5 OIL AND GAS PRODUC (77)! NOTE 6 RELATED PARTY TRAN (12)! NOTE 6 RELATED PARTY TRAN (13) NOTE 7 OIL AND GAS INFORM (98) NOTE 7 OIL AND GAS INFORM (99) NOTE 7 OIL AND GAS INFOR (100)! 19 PAGE 1108 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (19)Beneficial Ownership (19) PARKER PARSLEY 90B CONV LP (1)INDEX TO EXHIBITS (17)SELECTED FINANCIAL DATA (38)!31 2000 1 PAGE 1119 PARKER PARSPARKER PARSLEY 90B LP ITEM 6 SELECTED FINANCIAL (20)INDEX TO FINANCIAL STATE (17)Balance Sheet (39)Income Statement (40) STATEMENTS OF PARTNERS CA (39)Cash Flows (40)!16 PAGE 1136 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (78)! NOTE 5 OIL AND GAS PRODUC (79)! NOTE 6 RELATED PARTY TRAN (14)! NOTE 6 RELATED PARTY TRAN (15) NOTE 7 OIL AND GAS INFOR (101) NOTE 7 OIL AND GAS INFOR (102) NOTE 7 OIL AND GAS INFOR (103)! 19 PAGE 1139 NOTE 8 MAJOR CUS!ITEM 10 DIRECTORS AND EXEC (20)Beneficial Ownership (20)PARKER PARSLEY 90B LP (1)INDEX TO EXHIBITS (18)SELECTED FINANCIAL DATA (39) SUPPLEMENTAL INFORMATION (33)PARKER PARSLEY 90C CONV LP ITEM 6 SELECTED FINANCIAL (21)INDEX TO FINANCIAL STATE (18)Balance Sheet (40)Income Statement (41) STATEMENTS OF PARTNERS CA (40)Cash Flows (41)!15 PAGE 1166 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (80)! NOTE 5 OIL AND GAS PRODUC (81)! NOTE 6 RELATED PARTY TRAN (16)! NOTE 6 RELATED PARTY TRAN (17) NOTE 7 OIL AND GAS INFOR (104) NOTE 7 OIL AND GAS INFOR (105) NOTE 7 OIL AND GAS INFOR (106)! 18 PAGE 1169 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (21)Beneficial Ownership (21) PARKER PARSLEY 90C CONV LP (1)INDEX TO EXHIBITS (19)SELECTED FINANCIAL DATA (40)!31 2000 1 PAGE 1180 PARKER PARSPARKER PARSLEY 90C LP ITEM 6 SELECTED FINANCIAL (22)INDEX TO FINANCIAL STATE (19)Balance Sheet (41)Income Statement (42) STATEMENTS OF PARTNERS CA (41)Cash Flows (42)!15 PAGE 1196 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (82)! NOTE 5 OIL AND GAS PRODUC (83)! NOTE 6 RELATED PARTY TRAN (18)! NOTE 6 RELATED PARTY TRAN (19) NOTE 7 OIL AND GAS INFOR (107) NOTE 7 OIL AND GAS INFOR (108) NOTE 7 OIL AND GAS INFOR (109)! 18 PAGE 1199 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (22)Beneficial Ownership (22)PARKER PARSLEY 90C LP (1)INDEX TO EXHIBITS (20)SELECTED FINANCIAL DATA (41) SUPPLEMENTAL INFORMATION (34)Balance Sheet (42)Income Statement (43) STATEMENTS OF PARTNERS CA (42)Cash Flows (43)!8 PAGE 1219 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (84)! NOTE 5 OIL AND GAS PRODUC (85)! 9 PAGE 1220 NOTE 6 RELATED PAR! 9 PAGE 1220 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (110) NOTE 7 OIL AND GAS INFOR (111) NOTE 7 OIL AND GAS INFOR (112)! 11 PAGE 1222 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (42) SUPPLEMENTAL INFORMATION (35)Balance Sheet (43)Income Statement (44) STATEMENTS OF PARTNERS CA (43)Cash Flows (44)!8 PAGE 1238 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (86)! NOTE 5 OIL AND GAS PRODUC (87)! 9 PAGE 1239 NOTE 6 RELATED PAR! 9 PAGE 1239 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (113) NOTE 7 OIL AND GAS INFOR (114) NOTE 7 OIL AND GAS INFOR (115)! 11 PAGE 1241 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (43)!31 2000 1 PAGE 1248 PARKER PARSPARKER PARSLEY 91A LP ITEM 6 SELECTED FINANCIAL (23)INDEX TO FINANCIAL STATE (20)Balance Sheet (44)Income Statement (45) STATEMENTS OF PARTNERS CA (44)Cash Flows (45)!15 PAGE 1264 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (88)! NOTE 5 OIL AND GAS PRODUC (89)! NOTE 6 RELATED PARTY TRAN (20)! NOTE 6 RELATED PARTY TRAN (21) NOTE 7 OIL AND GAS INFOR (116) NOTE 7 OIL AND GAS INFOR (117) NOTE 7 OIL AND GAS INFOR (118)! 18 PAGE 1267 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (23)Beneficial Ownership (23)PARKER PARSLEY 91A LP (1)INDEX TO EXHIBITS (21)SELECTED FINANCIAL DATA (44)!31 2000 1 PAGE 1278 PARKER PARSPARKER PARSLEY 91B LP ITEM 6 SELECTED FINANCIAL (24)INDEX TO FINANCIAL STATE (21)Balance Sheet (45)Income Statement (46) STATEMENTS OF PARTNERS CA (45)Cash Flows (46)!15 PAGE 1294 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (90)! NOTE 5 OIL AND GAS PRODUC (91)! NOTE 6 RELATED PARTY TRAN (22)! NOTE 6 RELATED PARTY TRAN (23) NOTE 7 OIL AND GAS INFOR (119) NOTE 7 OIL AND GAS INFOR (120) NOTE 7 OIL AND GAS INFOR (121)! 18 PAGE 1297 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (24)Beneficial Ownership (24)PARKER PARSLEY 91B LP (1)INDEX TO EXHIBITS (22)SELECTED FINANCIAL DATA (45)POWER OF ATTORNEYPOWER OF ATTORNEY (1)POWER OF ATTORNEY (2)POWER OF ATTORNEY (3)POWER OF ATTORNEY (4)POWER OF ATTORNEY (5)POWER OF ATTORNEY (6)POWER OF ATTORNEY (7)!2001 THE BOARD OF DIRECTORS REC!2001 THE BOARD OF DIRECTORS (1)!2001 THE BOARD OF DIRECTORS (2)PAGE 2U } } } 0.     $PIONEER NATURAL RESOURCES CO S-4 04/17/2001 PIONEER USA NAME AGE POSITION   Scott D. Sheffield~  PresidentTimothy L. Dove~ .&Director, Executive Vice President andChief Financial OfficerDennis E. Fagerstone~ -%Director and Executive Vice PresidentMark L. Withrow~ +#Director, Executive Vice President,%General Counsel and SecretaryDanny L. Kellum~ -%Director and Executive Vice President$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/6xl`-! m2{:=PF0*8X> @ l  :X` dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/?? SECURITIES AND EXC!CALCULATION OF REGISTRATION FEETO BE HELD ON 2001TABLE OF CONTENTSPAGE 7 LIST OF APPENDICES!LIMITED PARTNER INVESTMENT REPA!LIMITED PARTNER INVESTMENT (1) 5 PAGE 15 NYMEX FUTURES PRICES!EXAMPLE CALCULATION OF MERGER VIncome StatementIncome Statement (1)AT DECEMBER 31 2000!15 PAGE 25 COMPARATIVE PER SHAR!25 PAGE 35 REASONS FOR THE MERGFAIRNESS OPINIONFAIRNESS OPINION (1)!LEGAL OPINION FOR LIMITED PARTN!LEGAL OPINION FOR LIMITED P (1)!NONMANAGING GENERAL PARTNERS OF!49 PAGE 59 PAYMENT OF EXPENSES !58 PAGE 68 COMPARATIVE PER SHAR!60 PAGE 70 OWNERSHIP OF PARTNER PIONEER PIONEER USATHE DRILLING PARTNERSHIPS (1)THE INCOME PARTNERSHIPS INTERESTSINTERESTS (1)INTERESTS (2)INTERESTS (3)INTERESTS (4)INTERESTS (5)!WHERE YOU CAN FIND MORE INFORMAAS OF DECEMBER 31 2000YEAR ENDED DECEMBER 31 2000!QUANTITIES OF OIL AND GAS RESER!STANDARDIZED MEASURE OF DISCOUN CASH FLOWSAS OF MARCH 31 2001AS OF MARCH 31 2001 (1)AS OF MARCH 31 2001 (2)AS OF MARCH 31 2001 (3)AS OF MARCH 31 2001 (4)AS OF MARCH 31 2001 (5)!FROM INCEPTION THROUGH MARCH 31!ANNUAL REPURCHASE PRICES AND AGOF EACH PARTNERSHIP!FOR THE THREE MONTHS ENDED MARCAS OF DECEMBER 31 2000 (1)AS OF MARCH 31 2001 (6)!THE YEARS ENDED DECEMBER 31 200AS OF DECEMBER 31 2000 (2)DECEMBER 31 2000 AND 1999EFFECTIVE DECEMBER 31 2000 EFFECTIVE DECEMBER 31 2000 (1) RECITALS RECITALS (1) SUPPLEMENTAL INFORMATION TABLEBalance SheetIncome Statement (2) STATEMENTS OF PARTNERS CAPITALCash Flows (1)NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCING A! NOTE 5 OIL AND GAS PRODUCI (1)! NOTE 6 RELATED PARTY TRANSACTI! NOTE 6 RELATED PARTY TRANS (1)! NOTE 7 OIL AND GAS INFORMATION! NOTE 7 OIL AND GAS INFORMA (1)! NOTE 7 OIL AND GAS INFORMA (2)!11 PAGE 163 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA SUPPLEMENTAL INFORMATION T (1)Balance Sheet (1)Income Statement (3) STATEMENTS OF PARTNERS CAP (1)Cash Flows (2)NOTE 4 INCOME TAXES (1)! NOTE 5 OIL AND GAS PRODUCI (2)! NOTE 5 OIL AND GAS PRODUCI (3)! 9 PAGE 180 NOTE 6 RELATED PAR! 9 PAGE 180 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORMA (3)! NOTE 7 OIL AND GAS INFORMA (4)! NOTE 7 OIL AND GAS INFORMA (5)!11 PAGE 182 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (1) SUPPLEMENTAL INFORMATION T (2) ITEM 6 SELECTED FINANCIAL DATAINDEX TO FINANCIAL STATEMENTSBalance Sheet (2)Income Statement (4) STATEMENTS OF PARTNERS CAP (2)Cash Flows (3)!15 PAGE 205 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCI (4)! NOTE 5 OIL AND GAS PRODUCI (5)! NOTE 6 RELATED PARTY TRANS (2)! NOTE 6 RELATED PARTY TRANS (3)! NOTE 7 OIL AND GAS INFORMA (6)! NOTE 7 OIL AND GAS INFORMA (7)! NOTE 7 OIL AND GAS INFORMA (8)! NOTE 7 OIL AND GAS INFORMA (9)! NOTE 7 OIL AND GAS INFORM (10)! 18 PAGE 208 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECUTIVEBeneficial OwnershipPARKER PARSLEY 82I LTDINDEX TO EXHIBITSSELECTED FINANCIAL DATA (2) SUPPLEMENTAL INFORMATION T (3) ITEM 6 SELECTED FINANCIAL (1)INDEX TO FINANCIAL STATEM (1)Balance Sheet (3)Income Statement (5) STATEMENTS OF PARTNERS CAP (3)Cash Flows (4)NOTE 4 INCOME TAXES (2)! NOTE 5 OIL AND GAS PRODUCI (6)! NOTE 5 OIL AND GAS PRODUCI (7)! 16 PAGE 236 NOTE 6 RELATED PAR! 16 PAGE 236 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (11)! NOTE 7 OIL AND GAS INFORM (12)! NOTE 7 OIL AND GAS INFORM (13)!18 PAGE 238 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (1)Beneficial Ownership (1)PARKER PARSLEY 82II LTDINDEX TO EXHIBITS (1)SELECTED FINANCIAL DATA (3) SUPPLEMENTAL INFORMATION T (4)Balance Sheet (4)Income Statement (6) STATEMENTS OF PARTNERS CAP (4)Cash Flows (5)NOTE 4 INCOME TAXES (3)! NOTE 5 OIL AND GAS PRODUCI (8)! NOTE 5 OIL AND GAS PRODUCI (9)! 9 PAGE 259 NOTE 6 RELATED PART! 9 PAGE 259 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (14)! NOTE 7 OIL AND GAS INFORM (15)! NOTE 7 OIL AND GAS INFORM (16)!11 PAGE 261 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (4) SUPPLEMENTAL INFORMATION T (5)PARKER PARSLEY 83A LTD ITEM 6 SELECTED FINANCIAL (2)INDEX TO FINANCIAL STATEM (2)Balance Sheet (5)Income Statement (7) STATEMENTS OF PARTNERS CAP (5)Cash Flows (6)NOTE 4 INCOME TAXES (4)! NOTE 5 OIL AND GAS PRODUC (10)! NOTE 5 OIL AND GAS PRODUC (11)! 16 PAGE 285 NOTE 6 RELATED PAR! 16 PAGE 285 NOTE 6 RELATED (1)!NOTE 7 OIL AND GAS INFORMATION  NOTE 7 OIL AND GAS INFORMA (1) NOTE 7 OIL AND GAS INFORMA (2)! 18 PAGE 287 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECU (2)Beneficial Ownership (2)PARKER PARSLEY 83A LTD (1)INDEX TO EXHIBITS (2)SELECTED FINANCIAL DATA (5) SUPPLEMENTAL INFORMATION T (6)PARKER PARSLEY 83B LTD ITEM 6 SELECTED FINANCIAL (3)INDEX TO FINANCIAL STATEM (3)Balance Sheet (6)Income Statement (8) STATEMENTS OF PARTNERS CAP (6)Cash Flows (7)NOTE 4 INCOME TAXES (5)! NOTE 5 OIL AND GAS PRODUC (12)! NOTE 5 OIL AND GAS PRODUC (13)! 16 PAGE 315 NOTE 6 RELATED PAR! 16 PAGE 315 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (3) NOTE 7 OIL AND GAS INFORMA (4) NOTE 7 OIL AND GAS INFORMA (5)!18 PAGE 317 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (3)Beneficial Ownership (3)PARKER PARSLEY 83B LTD (1)INDEX TO EXHIBITS (3)SELECTED FINANCIAL DATA (6) SUPPLEMENTAL INFORMATION T (7)PARKER PARSLEY 84A LTD ITEM 6 SELECTED FINANCIAL (4)INDEX TO FINANCIAL STATEM (4)Balance Sheet (7)Income Statement (9) STATEMENTS OF PARTNERS CAP (7)Cash Flows (8)!15 PAGE 344 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (14)! NOTE 5 OIL AND GAS PRODUC (15)! 16 PAGE 345 NOTE 6 RELATED PAR! 16 PAGE 345 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (6) NOTE 7 OIL AND GAS INFORMA (7) NOTE 7 OIL AND GAS INFORMA (8)!18 PAGE 347 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (4)Beneficial Ownership (4)PARKER PARSLEY 84A LTD (1)INDEX TO EXHIBITS (4)SELECTED FINANCIAL DATA (7) SUPPLEMENTAL INFORMATION T (8)PARKER PARSLEY 85A LTD ITEM 6 SELECTED FINANCIAL (5)INDEX TO FINANCIAL STATEM (5)Balance Sheet (8)Income Statement (10) STATEMENTS OF PARTNERS CAP (8)Cash Flows (9)NOTE 4 INCOME TAXES (6)! NOTE 5 OIL AND GAS PRODUC (16)! NOTE 5 OIL AND GAS PRODUC (17)! 16 PAGE 375 NOTE 6 RELATED PAR! 16 PAGE 375 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (9) NOTE 7 OIL AND GAS INFORM (10) NOTE 7 OIL AND GAS INFORM (11)!18 PAGE 377 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (5)Beneficial Ownership (5)PARKER PARSLEY 85A LTD (1)INDEX TO EXHIBITS (5)SELECTED FINANCIAL DATA (8) SUPPLEMENTAL INFORMATION T (9)PARKER PARSLEY 85B LTD ITEM 6 SELECTED FINANCIAL (6)!7 PAGE 396 ITEM 8 FINANCIAL STABalance Sheet (9) STATEMENTS OF PARTNERS CAP (9)Cash Flows (10)!15 PAGE 404 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (18)! NOTE 5 OIL AND GAS PRODUC (19)! 16 PAGE 405 NOTE 6 RELATED PAR! 16 PAGE 405 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (12) NOTE 7 OIL AND GAS INFORM (13) NOTE 7 OIL AND GAS INFORM (14)!18 PAGE 407 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (6)Beneficial Ownership (6)PARKER PARSLEY 85B LTD (1)INDEX TO EXHIBITS (6)SELECTED FINANCIAL DATA (9) SUPPLEMENTAL INFORMATION (10)Balance Sheet (10)Income Statement (11) STATEMENTS OF PARTNERS CA (10)Cash Flows (11)NOTE 4 INCOME TAXES (7)! NOTE 5 OIL AND GAS PRODUC (20)! NOTE 5 OIL AND GAS PRODUC (21)! 9 PAGE 428 NOTE 6 RELATED PART! 9 PAGE 428 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (15) NOTE 7 OIL AND GAS INFORM (16) NOTE 7 OIL AND GAS INFORM (17)! 11 PAGE 430 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (10) SUPPLEMENTAL INFORMATION (11)Balance Sheet (11)Income Statement (12) STATEMENTS OF PARTNERS CA (11)Cash Flows (12) 8 PAGE 446 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (22)! NOTE 5 OIL AND GAS PRODUC (23)! 9 PAGE 447 NOTE 6 RELATED PART! 9 PAGE 447 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (18) NOTE 7 OIL AND GAS INFORM (19) NOTE 7 OIL AND GAS INFORM (20)! 11 PAGE 449 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (11) SUPPLEMENTAL INFORMATION (12)PARKER PARSLEY 86A LTD ITEM 6 SELECTED FINANCIAL (7)INDEX TO FINANCIAL STATEM (6)Balance Sheet (12)Income Statement (13) STATEMENTS OF PARTNERS CA (12)Cash Flows (13)NOTE 4 INCOME TAXES (8)! NOTE 5 OIL AND GAS PRODUC (24)! NOTE 5 OIL AND GAS PRODUC (25)! 16 PAGE 473 NOTE 6 RELATED PAR! 16 PAGE 473 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (21) NOTE 7 OIL AND GAS INFORM (22) NOTE 7 OIL AND GAS INFORM (23)!18 PAGE 475 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (7)Beneficial Ownership (7)PARKER PARSLEY 86A LTD (1)INDEX TO EXHIBITS (7)SELECTED FINANCIAL DATA (12) SUPPLEMENTAL INFORMATION (13)PARKER PARSLEY 86B LTD ITEM 6 SELECTED FINANCIAL (8)INDEX TO FINANCIAL STATEM (7)Balance Sheet (13)Income Statement (14) STATEMENTS OF PARTNERS CA (13)Cash Flows (14)!16 PAGE 503 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (26)! NOTE 5 OIL AND GAS PRODUC (27)! NOTE 6 RELATED PARTY TRANS (4)! NOTE 6 RELATED PARTY TRANS (5) NOTE 7 OIL AND GAS INFORM (24) NOTE 7 OIL AND GAS INFORM (25) NOTE 7 OIL AND GAS INFORM (26)!19 PAGE 506 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (8)Beneficial Ownership (8)PARKER PARSLEY 86B LTD (1)INDEX TO EXHIBITS (8)SELECTED FINANCIAL DATA (13) SUPPLEMENTAL INFORMATION (14) ITEM 6 SELECTED FINANCIAL (9)!7 PAGE 525 ITEM 8 FINANCIAL STABalance Sheet (14)Income Statement (15) STATEMENTS OF PARTNERS CA (14)Cash Flows (15)NOTE 4 INCOME TAXES (9)! NOTE 5 OIL AND GAS PRODUC (28)! NOTE 5 OIL AND GAS PRODUC (29)! 16 PAGE 534 NOTE 6 RELATED PAR! 16 PAGE 534 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (27) NOTE 7 OIL AND GAS INFORM (28) NOTE 7 OIL AND GAS INFORM (29)!18 PAGE 536 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (9)Beneficial Ownership (9)PARKER PARSLEY 86C LTDSELECTED FINANCIAL DATA (14) SUPPLEMENTAL INFORMATION (15)Balance Sheet (15)Income Statement (16) STATEMENTS OF PARTNERS CA (15)Cash Flows (16) 8 PAGE 556 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (30)! NOTE 5 OIL AND GAS PRODUC (31)! NOTE 6 RELATED PARTY TRANS (6)! NOTE 6 RELATED PARTY TRANS (7) NOTE 7 OIL AND GAS INFORM (30) NOTE 7 OIL AND GAS INFORM (31) NOTE 7 OIL AND GAS INFORM (32)! 11 PAGE 559 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (15) SUPPLEMENTAL INFORMATION (16)Balance Sheet (16)Income Statement (17) STATEMENTS OF PARTNERS CA (16)Cash Flows (17)NOTE 4 INCOME TAXES (10)! NOTE 5 OIL AND GAS PRODUC (32)! NOTE 5 OIL AND GAS PRODUC (33)! 9 PAGE 576 NOTE 6 RELATED PART! 9 PAGE 576 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (33) NOTE 7 OIL AND GAS INFORM (34) NOTE 7 OIL AND GAS INFORM (35)!11 PAGE 578 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (16) SUPPLEMENTAL INFORMATION (17) ITEM 6 SELECTED FINANCIAL (10)!8 PAGE 594 ITEM 8 FINANCIAL STABalance Sheet (17)Income Statement (18) STATEMENTS OF PARTNERS CA (17)Cash Flows (18)NOTE 4 INCOME TAXES (11)! NOTE 5 OIL AND GAS PRODUC (34)! NOTE 5 OIL AND GAS PRODUC (35)! 17 PAGE 603 NOTE 6 RELATED PAR! 17 PAGE 603 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (36) NOTE 7 OIL AND GAS INFORM (37) NOTE 7 OIL AND GAS INFORM (38)! 19 PAGE 605 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (10)Beneficial Ownership (10)PARKER PARSLEY 87A LTDSELECTED FINANCIAL DATA (17) SUPPLEMENTAL INFORMATION (18)Balance Sheet (18)Income Statement (19) STATEMENTS OF PARTNERS CA (18)Cash Flows (19) 8 PAGE 625 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (36)! NOTE 5 OIL AND GAS PRODUC (37)! 9 PAGE 626 NOTE 6 RELATED PART! 9 PAGE 626 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (39) NOTE 7 OIL AND GAS INFORM (40) NOTE 7 OIL AND GAS INFORM (41)! 11 PAGE 628 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (18) SUPPLEMENTAL INFORMATION (19) ITEM 6 SELECTED FINANCIAL (11)INDEX TO FINANCIAL STATEM (8)Balance Sheet (19)Income Statement (20) STATEMENTS OF PARTNERS CA (19)Cash Flows (20)NOTE 4 INCOME TAXES (12)! NOTE 5 OIL AND GAS PRODUC (38)! NOTE 5 OIL AND GAS PRODUC (39)! 17 PAGE 653 NOTE 6 RELATED PAR! 17 PAGE 653 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (42) NOTE 7 OIL AND GAS INFORM (43) NOTE 7 OIL AND GAS INFORM (44)! 19 PAGE 655 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (11)Beneficial Ownership (11)PARKER PARSLEY 87B LTDINDEX TO EXHIBITS (9)SELECTED FINANCIAL DATA (19) SUPPLEMENTAL INFORMATION (20) ITEM 6 SELECTED FINANCIAL (12)INDEX TO FINANCIAL STATEM (9)Balance Sheet (20)Income Statement (21) STATEMENTS OF PARTNERS CA (20)Cash Flows (21)!16 PAGE 683 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (40)! NOTE 5 OIL AND GAS PRODUC (41)! NOTE 6 RELATED PARTY TRANS (8)! NOTE 6 RELATED PARTY TRANS (9) NOTE 7 OIL AND GAS INFORM (45) NOTE 7 OIL AND GAS INFORM (46) NOTE 7 OIL AND GAS INFORM (47)!19 PAGE 686 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (12)Beneficial Ownership (12)PROPERTIES 87A LTDINDEX TO EXHIBITS (10)SELECTED FINANCIAL DATA (20) SUPPLEMENTAL INFORMATION (21) ITEM 6 SELECTED FINANCIAL (13)INDEX TO FINANCIAL STATE (10)Balance Sheet (21)Income Statement (22) STATEMENTS OF PARTNERS CA (21)Cash Flows (22)!16 PAGE 714 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (42)! NOTE 5 OIL AND GAS PRODUC (43)! 17 PAGE 715 NOTE 6 RELATED PAR! 17 PAGE 715 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (48) NOTE 7 OIL AND GAS INFORM (49) NOTE 7 OIL AND GAS INFORM (50)! 19 PAGE 717 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (13)Beneficial Ownership (13)PROPERTIES 87B LTDINDEX TO EXHIBITS (11)SELECTED FINANCIAL DATA (21) SUPPLEMENTAL INFORMATION (22)Balance Sheet (22)Income Statement (23) STATEMENTS OF PARTNERS CA (22)Cash Flows (23) 8 PAGE 737 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (44)! NOTE 5 OIL AND GAS PRODUC (45)! 9 PAGE 738 NOTE 6 RELATED PART! 9 PAGE 738 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (51) NOTE 7 OIL AND GAS INFORM (52) NOTE 7 OIL AND GAS INFORM (53)! 11 PAGE 740 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (22) SUPPLEMENTAL INFORMATION (23)Balance Sheet (23)Income Statement (24) STATEMENTS OF PARTNERS CA (23)Cash Flows (24) 8 PAGE 756 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (46)! NOTE 5 OIL AND GAS PRODUC (47)! 9 PAGE 757 NOTE 6 RELATED PART! 9 PAGE 757 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (54) NOTE 7 OIL AND GAS INFORM (55) NOTE 7 OIL AND GAS INFORM (56)! 11 PAGE 759 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (23)!31 2000 1 PAGE 766 PARKER PARSLPARKER PARSLEY 88A LP ITEM 6 SELECTED FINANCIAL (14)INDEX TO FINANCIAL STATE (11)Balance Sheet (24)Income Statement (25) STATEMENTS OF PARTNERS CA (24)Cash Flows (25)NOTE 4 INCOME TAXES (13)! NOTE 5 OIL AND GAS PRODUC (48)! NOTE 5 OIL AND GAS PRODUC (49)! 16 PAGE 783 NOTE 6 RELATED PAR! 16 PAGE 783 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (57) NOTE 7 OIL AND GAS INFORM (58) NOTE 7 OIL AND GAS INFORM (59)! 18 PAGE 785 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (14)Beneficial Ownership (14)PARKER PARSLEY 88A LP (1)INDEX TO EXHIBITS (12)SELECTED FINANCIAL DATA (24) SUPPLEMENTAL INFORMATION (24)Balance Sheet (25)Income Statement (26) STATEMENTS OF PARTNERS CA (25)Cash Flows (26) 8 PAGE 805 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (50)! NOTE 5 OIL AND GAS PRODUC (51)! 9 PAGE 806 NOTE 6 RELATED PART! 9 PAGE 806 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (60) NOTE 7 OIL AND GAS INFORM (61) NOTE 7 OIL AND GAS INFORM (62)! 11 PAGE 808 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (25)!31 2000 1 PAGE 815 PARKER PARSLPARKER PARSLEY 88B LP ITEM 6 SELECTED FINANCIAL (15)INDEX TO FINANCIAL STATE (12)Balance Sheet (26)Income Statement (27) STATEMENTS OF PARTNERS CA (26)Cash Flows (27)!16 PAGE 832 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (52)! NOTE 5 OIL AND GAS PRODUC (53)! 17 PAGE 833 NOTE 6 RELATED PAR! 17 PAGE 833 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (63) NOTE 7 OIL AND GAS INFORM (64) NOTE 7 OIL AND GAS INFORM (65)! 19 PAGE 835 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (15)Beneficial Ownership (15)PARKER PARSLEY 88B LP (1)INDEX TO EXHIBITS (13)SELECTED FINANCIAL DATA (26) SUPPLEMENTAL INFORMATION (25)Balance Sheet (27)Income Statement (28) STATEMENTS OF PARTNERS CA (27)Cash Flows (28) 8 PAGE 855 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (54)! NOTE 5 OIL AND GAS PRODUC (55)! 9 PAGE 856 NOTE 6 RELATED PART! 9 PAGE 856 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (66) NOTE 7 OIL AND GAS INFORM (67) NOTE 7 OIL AND GAS INFORM (68)! 11 PAGE 858 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (27)!31 2000 1 PAGE 865 PARKER PARSLBalance Sheet (28)Income Statement (29) STATEMENTS OF PARTNERS CA (28)Cash Flows (29) 8 PAGE 874 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (56)! NOTE 5 OIL AND GAS PRODUC (57)! 9 PAGE 875 NOTE 6 RELATED PART! 9 PAGE 875 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (69) NOTE 7 OIL AND GAS INFORM (70) NOTE 7 OIL AND GAS INFORM (71)! 11 PAGE 877 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (28) SUPPLEMENTAL INFORMATION (26)!PARKER PARSLEY PRODUCING PROPER ITEM 6 SELECTED FINANCIAL (16)INDEX TO FINANCIAL STATE (13)Balance Sheet (29)Income Statement (30) STATEMENTS OF PARTNERS CA (29)Cash Flows (30)NOTE 4 INCOME TAXES (14)! NOTE 5 OIL AND GAS PRODUC (58)! NOTE 5 OIL AND GAS PRODUC (59)! 16 PAGE 901 NOTE 6 RELATED PAR! 16 PAGE 901 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (72) NOTE 7 OIL AND GAS INFORM (73)!18 PAGE 903 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (16)Beneficial Ownership (16)PROPERTIES 88A LPINDEX TO EXHIBITS (14)SELECTED FINANCIAL DATA (29) SUPPLEMENTAL INFORMATION (27)Balance Sheet (30)Income Statement (31) STATEMENTS OF PARTNERS CA (30)Cash Flows (31)NOTE 4 INCOME TAXES (15)! NOTE 5 OIL AND GAS PRODUC (60)! NOTE 5 OIL AND GAS PRODUC (61)! 9 PAGE 924 NOTE 6 RELATED PART! 9 PAGE 924 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (74) NOTE 7 OIL AND GAS INFORM (75) NOTE 7 OIL AND GAS INFORM (76)! 11 PAGE 926 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (30) SUPPLEMENTAL INFORMATION (28)Balance Sheet (31)Income Statement (32) STATEMENTS OF PARTNERS CA (31)Cash Flows (32)NOTE 4 INCOME TAXES (16)! NOTE 5 OIL AND GAS PRODUC (62)! NOTE 5 OIL AND GAS PRODUC (63)! 9 PAGE 943 NOTE 6 RELATED PART! 9 PAGE 943 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (77) NOTE 7 OIL AND GAS INFORM (78) NOTE 7 OIL AND GAS INFORM (79)!11 PAGE 945 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (31)!31 2000 1 PAGE 952 PARKER PARSLPARKER PARSLEY 89A LP ITEM 6 SELECTED FINANCIAL (17)INDEX TO FINANCIAL STATE (14)Balance Sheet (32)Income Statement (33) STATEMENTS OF PARTNERS CA (32)Cash Flows (33)NOTE 4 INCOME TAXES (17)! NOTE 5 OIL AND GAS PRODUC (64)! NOTE 5 OIL AND GAS PRODUC (65)! 16 PAGE 969 NOTE 6 RELATED PAR! 16 PAGE 969 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (80) NOTE 7 OIL AND GAS INFORM (81) NOTE 7 OIL AND GAS INFORM (82) NOTE 7 OIL AND GAS INFORM (83)! 18 PAGE 971 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (17)Beneficial Ownership (17)PARKER PARSLEY 89A LP (1)INDEX TO EXHIBITS (15)SELECTED FINANCIAL DATA (32) SUPPLEMENTAL INFORMATION (29)Balance Sheet (33)Income Statement (34) STATEMENTS OF PARTNERS CA (33)Cash Flows (34) 8 PAGE 991 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (66)! NOTE 5 OIL AND GAS PRODUC (67)! 9 PAGE 992 NOTE 6 RELATED PART! 9 PAGE 992 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (84) NOTE 7 OIL AND GAS INFORM (85) NOTE 7 OIL AND GAS INFORM (86)! 11 PAGE 994 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (33)!31 2000 1 PAGE 1001 PARKER PARSBalance Sheet (34)Income Statement (35) STATEMENTS OF PARTNERS CA (34)Cash Flows (35)!8 PAGE 1010 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (68)! NOTE 5 OIL AND GAS PRODUC (69)! 9 PAGE 1011 NOTE 6 RELATED PAR! 9 PAGE 1011 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (87) NOTE 7 OIL AND GAS INFORM (88) NOTE 7 OIL AND GAS INFORM (89)!11 PAGE 1013 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (34) SUPPLEMENTAL INFORMATION (30)Balance Sheet (35)Income Statement (36) STATEMENTS OF PARTNERS CA (35)Cash Flows (36)!8 PAGE 1029 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (70)! NOTE 5 OIL AND GAS PRODUC (71)! 9 PAGE 1030 NOTE 6 RELATED PAR! 9 PAGE 1030 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (90) NOTE 7 OIL AND GAS INFORM (91) NOTE 7 OIL AND GAS INFORM (92)! 11 PAGE 1032 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (35) SUPPLEMENTAL INFORMATION (31)Balance Sheet (36)Income Statement (37) STATEMENTS OF PARTNERS CA (36)Cash Flows (37)!8 PAGE 1048 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (72)! NOTE 5 OIL AND GAS PRODUC (73)! 9 PAGE 1049 NOTE 6 RELATED PAR! 9 PAGE 1049 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (93) NOTE 7 OIL AND GAS INFORM (94) NOTE 7 OIL AND GAS INFORM (95)! 11 PAGE 1051 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (36)!31 2000 1 PAGE 1058 PARKER PARSPARKER PARSLEY 90A LP ITEM 6 SELECTED FINANCIAL (18)INDEX TO FINANCIAL STATE (15)Balance Sheet (37)Income Statement (38) STATEMENTS OF PARTNERS CA (37)Cash Flows (38)!15 PAGE 1074 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (74)! NOTE 5 OIL AND GAS PRODUC (75)! NOTE 6 RELATED PARTY TRAN (10)! NOTE 6 RELATED PARTY TRAN (11) NOTE 7 OIL AND GAS INFORM (96) NOTE 7 OIL AND GAS INFORM (97)! 18 PAGE 1077 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (18)Beneficial Ownership (18)PARKER PARSLEY 90A LP (1)INDEX TO EXHIBITS (16)SELECTED FINANCIAL DATA (37) SUPPLEMENTAL INFORMATION (32)PARKER PARSLEY 90B CONV LP ITEM 6 SELECTED FINANCIAL (19)INDEX TO FINANCIAL STATE (16)Balance Sheet (38)Income Statement (39) STATEMENTS OF PARTNERS CA (38)Cash Flows (39)!16 PAGE 1105 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (76)! NOTE 5 OIL AND GAS PRODUC (77)! NOTE 6 RELATED PARTY TRAN (12)! NOTE 6 RELATED PARTY TRAN (13) NOTE 7 OIL AND GAS INFORM (98) NOTE 7 OIL AND GAS INFORM (99) NOTE 7 OIL AND GAS INFOR (100)! 19 PAGE 1108 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (19)Beneficial Ownership (19) PARKER PARSLEY 90B CONV LP (1)INDEX TO EXHIBITS (17)SELECTED FINANCIAL DATA (38)!31 2000 1 PAGE 1119 PARKER PARSPARKER PARSLEY 90B LP ITEM 6 SELECTED FINANCIAL (20)INDEX TO FINANCIAL STATE (17)Balance Sheet (39)Income Statement (40) STATEMENTS OF PARTNERS CA (39)Cash Flows (40)!16 PAGE 1136 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (78)! NOTE 5 OIL AND GAS PRODUC (79)! NOTE 6 RELATED PARTY TRAN (14)! NOTE 6 RELATED PARTY TRAN (15) NOTE 7 OIL AND GAS INFOR (101) NOTE 7 OIL AND GAS INFOR (102) NOTE 7 OIL AND GAS INFOR (103)! 19 PAGE 1139 NOTE 8 MAJOR CUS!ITEM 10 DIRECTORS AND EXEC (20)Beneficial Ownership (20)PARKER PARSLEY 90B LP (1)INDEX TO EXHIBITS (18)SELECTED FINANCIAL DATA (39) SUPPLEMENTAL INFORMATION (33)PARKER PARSLEY 90C CONV LP ITEM 6 SELECTED FINANCIAL (21)INDEX TO FINANCIAL STATE (18)Balance Sheet (40)Income Statement (41) STATEMENTS OF PARTNERS CA (40)Cash Flows (41)!15 PAGE 1166 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (80)! NOTE 5 OIL AND GAS PRODUC (81)! NOTE 6 RELATED PARTY TRAN (16)! NOTE 6 RELATED PARTY TRAN (17) NOTE 7 OIL AND GAS INFOR (104) NOTE 7 OIL AND GAS INFOR (105) NOTE 7 OIL AND GAS INFOR (106)! 18 PAGE 1169 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (21)Beneficial Ownership (21) PARKER PARSLEY 90C CONV LP (1)INDEX TO EXHIBITS (19)SELECTED FINANCIAL DATA (40)!31 2000 1 PAGE 1180 PARKER PARSPARKER PARSLEY 90C LP ITEM 6 SELECTED FINANCIAL (22)INDEX TO FINANCIAL STATE (19)Balance Sheet (41)Income Statement (42) STATEMENTS OF PARTNERS CA (41)Cash Flows (42)!15 PAGE 1196 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (82)! NOTE 5 OIL AND GAS PRODUC (83)! NOTE 6 RELATED PARTY TRAN (18)! NOTE 6 RELATED PARTY TRAN (19) NOTE 7 OIL AND GAS INFOR (107) NOTE 7 OIL AND GAS INFOR (108) NOTE 7 OIL AND GAS INFOR (109)! 18 PAGE 1199 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (22)Beneficial Ownership (22)PARKER PARSLEY 90C LP (1)INDEX TO EXHIBITS (20)SELECTED FINANCIAL DATA (41) SUPPLEMENTAL INFORMATION (34)Balance Sheet (42)Income Statement (43) STATEMENTS OF PARTNERS CA (42)Cash Flows (43)!8 PAGE 1219 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (84)! NOTE 5 OIL AND GAS PRODUC (85)! 9 PAGE 1220 NOTE 6 RELATED PAR! 9 PAGE 1220 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (110) NOTE 7 OIL AND GAS INFOR (111) NOTE 7 OIL AND GAS INFOR (112)! 11 PAGE 1222 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (42) SUPPLEMENTAL INFORMATION (35)Balance Sheet (43)Income Statement (44) STATEMENTS OF PARTNERS CA (43)Cash Flows (44)!8 PAGE 1238 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (86)! NOTE 5 OIL AND GAS PRODUC (87)! 9 PAGE 1239 NOTE 6 RELATED PAR! 9 PAGE 1239 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (113) NOTE 7 OIL AND GAS INFOR (114) NOTE 7 OIL AND GAS INFOR (115)! 11 PAGE 1241 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (43)!31 2000 1 PAGE 1248 PARKER PARSPARKER PARSLEY 91A LP ITEM 6 SELECTED FINANCIAL (23)INDEX TO FINANCIAL STATE (20)Balance Sheet (44)Income Statement (45) STATEMENTS OF PARTNERS CA (44)Cash Flows (45)!15 PAGE 1264 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (88)! NOTE 5 OIL AND GAS PRODUC (89)! NOTE 6 RELATED PARTY TRAN (20)! NOTE 6 RELATED PARTY TRAN (21) NOTE 7 OIL AND GAS INFOR (116) NOTE 7 OIL AND GAS INFOR (117) NOTE 7 OIL AND GAS INFOR (118)! 18 PAGE 1267 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (23)Beneficial Ownership (23)PARKER PARSLEY 91A LP (1)INDEX TO EXHIBITS (21)SELECTED FINANCIAL DATA (44)!31 2000 1 PAGE 1278 PARKER PARSPARKER PARSLEY 91B LP ITEM 6 SELECTED FINANCIAL (24)INDEX TO FINANCIAL STATE (21)Balance Sheet (45)Income Statement (46) STATEMENTS OF PARTNERS CA (45)Cash Flows (46)!15 PAGE 1294 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (90)! NOTE 5 OIL AND GAS PRODUC (91)! NOTE 6 RELATED PARTY TRAN (22)! NOTE 6 RELATED PARTY TRAN (23) NOTE 7 OIL AND GAS INFOR (119) NOTE 7 OIL AND GAS INFOR (120) NOTE 7 OIL AND GAS INFOR (121)! 18 PAGE 1297 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (24)Beneficial Ownership (24)PARKER PARSLEY 91B LP (1)INDEX TO EXHIBITS (22)SELECTED FINANCIAL DATA (45)POWER OF ATTORNEYPOWER OF ATTORNEY (1)POWER OF ATTORNEY (2)POWER OF ATTORNEY (3)POWER OF ATTORNEY (4)POWER OF ATTORNEY (5)POWER OF ATTORNEY (6)POWER OF ATTORNEY (7)!2001 THE BOARD OF DIRECTORS REC!2001 THE BOARD OF DIRECTORS (1)!2001 THE BOARD OF DIRECTORS (2)PAGE 2U } @} a :    $PIONEER NATURAL RESOURCES CO S-4 04/17/2001!THE DRILLING PARTNERSHIPS NAME STATE OF FORMATION   #Parker & Parsley 81-I, Ltd.Texas$Parker & Parsley 81-II, Ltd.Texas#Parker & Parsley 82-I, Ltd.Texas$Parker & Parsley 82-II, Ltd.Texas%Parker & Parsley 82-III, Ltd.Texas#Parker & Parsley 83-A, Ltd.Texas#Parker & Parsley 83-B, Ltd.Texas#Parker & Parsley 84-A, Ltd.Texas#Parker & Parsley 85-A, Ltd.Texas#Parker & Parsley 85-B, Ltd.Texas6.Parker & Parsley Private Investment 85-A, Ltd.Texas=5Parker & Parsley Selected 85 Private Investment, Ltd.Texas#Parker & Parsley 86-A, Ltd.Texas#Parker & Parsley 86-B, Ltd.Texas#Parker & Parsley 86-C, Ltd.Texas4,Parker & Parsley Private Investment 86, Ltd.Texas)!Parker & Parsley 87-A Conv., Ltd.Texas#Parker & Parsley 87-A, Ltd.Texas)!Parker & Parsley 87-B Conv., Ltd.TexasDlvj^R$ Wt</> !"#$%&'()*+,-./0123456789# Parker & Parsley 87-B, Ltd. Texas4!,Parker & Parsley Private Investment 87, Ltd.!Texas)"!Parker & Parsley 88-A Conv., L.P."Delaware##Parker & Parsley 88-A, L.P.#Delaware)$!Parker & Parsley 88-B Conv., L.P.$Delaware"%Parker & Parsley 88-B L.P.%Delaware)&!Parker & Parsley 88-C Conv., L.P.&Delaware#'Parker & Parsley 88-C, L.P.'Delaware4(,Parker & Parsley Private Investment 88, L.P.(Delaware))!Parker & Parsley 89-A Conv., L.P.)Delaware#*Parker & Parsley 89-A, L.P.*Delaware)+!Parker & Parsley 89-B Conv., L.P.+Delaware#,Parker & Parsley 89-B, L.P.,Delaware4-,Parker & Parsley Private Investment 89, L.P.-Delaware).!Parker & Parsley 90-A Conv., L.P..Delaware#/Parker & Parsley 90-A, L.P./Delaware)0!Parker & Parsley 90-B Conv., L.P.0Delaware#1Parker & Parsley 90-B, L.P.1Delaware)2!Parker & Parsley 90-C Conv., L.P.2Delaware#3Parker & Parsley 90-C, L.P.3Delaware44,Parker & Parsley Private Investment 90, L.P.4Delaware56$7____________________________18)Created by Morningstar Document Research.09(http://documentresearch.morningstar.com/8>G D|;C|=PF0*8X> @998877 l  1 dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/?? SECURITIES AND EXC!CALCULATION OF REGISTRATION FEETO BE HELD ON 2001TABLE OF CONTENTSPAGE 7 LIST OF APPENDICES!LIMITED PARTNER INVESTMENT REPA!LIMITED PARTNER INVESTMENT (1) 5 PAGE 15 NYMEX FUTURES PRICES!EXAMPLE CALCULATION OF MERGER VIncome StatementIncome Statement (1)AT DECEMBER 31 2000!15 PAGE 25 COMPARATIVE PER SHAR!25 PAGE 35 REASONS FOR THE MERGFAIRNESS OPINIONFAIRNESS OPINION (1)!LEGAL OPINION FOR LIMITED PARTN!LEGAL OPINION FOR LIMITED P (1)!NONMANAGING GENERAL PARTNERS OF!49 PAGE 59 PAYMENT OF EXPENSES !58 PAGE 68 COMPARATIVE PER SHAR!60 PAGE 70 OWNERSHIP OF PARTNER PIONEER PIONEER USATHE DRILLING PARTNERSHIPSTHE INCOME PARTNERSHIPS INTERESTSINTERESTS (1)INTERESTS (2)INTERESTS (3)INTERESTS (4)INTERESTS (5)!WHERE YOU CAN FIND MORE INFORMAAS OF DECEMBER 31 2000YEAR ENDED DECEMBER 31 2000!QUANTITIES OF OIL AND GAS RESER!STANDARDIZED MEASURE OF DISCOUN CASH FLOWSAS OF MARCH 31 2001AS OF MARCH 31 2001 (1)AS OF MARCH 31 2001 (2)AS OF MARCH 31 2001 (3)AS OF MARCH 31 2001 (4)AS OF MARCH 31 2001 (5)!FROM INCEPTION THROUGH MARCH 31!ANNUAL REPURCHASE PRICES AND AGOF EACH PARTNERSHIP!FOR THE THREE MONTHS ENDED MARCAS OF DECEMBER 31 2000 (1)AS OF MARCH 31 2001 (6)!THE YEARS ENDED DECEMBER 31 200AS OF DECEMBER 31 2000 (2)DECEMBER 31 2000 AND 1999EFFECTIVE DECEMBER 31 2000 EFFECTIVE DECEMBER 31 2000 (1) RECITALS RECITALS (1) SUPPLEMENTAL INFORMATION TABLEBalance SheetIncome Statement (2) STATEMENTS OF PARTNERS CAPITALCash Flows (1)NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCING A! NOTE 5 OIL AND GAS PRODUCI (1)! NOTE 6 RELATED PARTY TRANSACTI! NOTE 6 RELATED PARTY TRANS (1)! NOTE 7 OIL AND GAS INFORMATION! NOTE 7 OIL AND GAS INFORMA (1)! NOTE 7 OIL AND GAS INFORMA (2)!11 PAGE 163 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA SUPPLEMENTAL INFORMATION T (1)Balance Sheet (1)Income Statement (3) STATEMENTS OF PARTNERS CAP (1)Cash Flows (2)NOTE 4 INCOME TAXES (1)! NOTE 5 OIL AND GAS PRODUCI (2)! NOTE 5 OIL AND GAS PRODUCI (3)! 9 PAGE 180 NOTE 6 RELATED PAR! 9 PAGE 180 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORMA (3)! NOTE 7 OIL AND GAS INFORMA (4)! NOTE 7 OIL AND GAS INFORMA (5)!11 PAGE 182 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (1) SUPPLEMENTAL INFORMATION T (2) ITEM 6 SELECTED FINANCIAL DATAINDEX TO FINANCIAL STATEMENTSBalance Sheet (2)Income Statement (4) STATEMENTS OF PARTNERS CAP (2)Cash Flows (3)!15 PAGE 205 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCI (4)! NOTE 5 OIL AND GAS PRODUCI (5)! NOTE 6 RELATED PARTY TRANS (2)! NOTE 6 RELATED PARTY TRANS (3)! NOTE 7 OIL AND GAS INFORMA (6)! NOTE 7 OIL AND GAS INFORMA (7)! NOTE 7 OIL AND GAS INFORMA (8)! NOTE 7 OIL AND GAS INFORMA (9)! NOTE 7 OIL AND GAS INFORM (10)! 18 PAGE 208 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECUTIVEBeneficial OwnershipPARKER PARSLEY 82I LTDINDEX TO EXHIBITSSELECTED FINANCIAL DATA (2) SUPPLEMENTAL INFORMATION T (3) ITEM 6 SELECTED FINANCIAL (1)INDEX TO FINANCIAL STATEM (1)Balance Sheet (3)Income Statement (5) STATEMENTS OF PARTNERS CAP (3)Cash Flows (4)NOTE 4 INCOME TAXES (2)! NOTE 5 OIL AND GAS PRODUCI (6)! NOTE 5 OIL AND GAS PRODUCI (7)! 16 PAGE 236 NOTE 6 RELATED PAR! 16 PAGE 236 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (11)! NOTE 7 OIL AND GAS INFORM (12)! NOTE 7 OIL AND GAS INFORM (13)!18 PAGE 238 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (1)Beneficial Ownership (1)PARKER PARSLEY 82II LTDINDEX TO EXHIBITS (1)SELECTED FINANCIAL DATA (3) SUPPLEMENTAL INFORMATION T (4)Balance Sheet (4)Income Statement (6) STATEMENTS OF PARTNERS CAP (4)Cash Flows (5)NOTE 4 INCOME TAXES (3)! NOTE 5 OIL AND GAS PRODUCI (8)! NOTE 5 OIL AND GAS PRODUCI (9)! 9 PAGE 259 NOTE 6 RELATED PART! 9 PAGE 259 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (14)! NOTE 7 OIL AND GAS INFORM (15)! NOTE 7 OIL AND GAS INFORM (16)!11 PAGE 261 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (4) SUPPLEMENTAL INFORMATION T (5)PARKER PARSLEY 83A LTD ITEM 6 SELECTED FINANCIAL (2)INDEX TO FINANCIAL STATEM (2)Balance Sheet (5)Income Statement (7) STATEMENTS OF PARTNERS CAP (5)Cash Flows (6)NOTE 4 INCOME TAXES (4)! NOTE 5 OIL AND GAS PRODUC (10)! NOTE 5 OIL AND GAS PRODUC (11)! 16 PAGE 285 NOTE 6 RELATED PAR! 16 PAGE 285 NOTE 6 RELATED (1)!NOTE 7 OIL AND GAS INFORMATION  NOTE 7 OIL AND GAS INFORMA (1) NOTE 7 OIL AND GAS INFORMA (2)! 18 PAGE 287 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECU (2)Beneficial Ownership (2)PARKER PARSLEY 83A LTD (1)INDEX TO EXHIBITS (2)SELECTED FINANCIAL DATA (5) SUPPLEMENTAL INFORMATION T (6)PARKER PARSLEY 83B LTD ITEM 6 SELECTED FINANCIAL (3)INDEX TO FINANCIAL STATEM (3)Balance Sheet (6)Income Statement (8) STATEMENTS OF PARTNERS CAP (6)Cash Flows (7)NOTE 4 INCOME TAXES (5)! NOTE 5 OIL AND GAS PRODUC (12)! NOTE 5 OIL AND GAS PRODUC (13)! 16 PAGE 315 NOTE 6 RELATED PAR! 16 PAGE 315 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (3) NOTE 7 OIL AND GAS INFORMA (4) NOTE 7 OIL AND GAS INFORMA (5)!18 PAGE 317 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (3)Beneficial Ownership (3)PARKER PARSLEY 83B LTD (1)INDEX TO EXHIBITS (3)SELECTED FINANCIAL DATA (6) SUPPLEMENTAL INFORMATION T (7)PARKER PARSLEY 84A LTD ITEM 6 SELECTED FINANCIAL (4)INDEX TO FINANCIAL STATEM (4)Balance Sheet (7)Income Statement (9) STATEMENTS OF PARTNERS CAP (7)Cash Flows (8)!15 PAGE 344 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (14)! NOTE 5 OIL AND GAS PRODUC (15)! 16 PAGE 345 NOTE 6 RELATED PAR! 16 PAGE 345 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (6) NOTE 7 OIL AND GAS INFORMA (7) NOTE 7 OIL AND GAS INFORMA (8)!18 PAGE 347 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (4)Beneficial Ownership (4)PARKER PARSLEY 84A LTD (1)INDEX TO EXHIBITS (4)SELECTED FINANCIAL DATA (7) SUPPLEMENTAL INFORMATION T (8)PARKER PARSLEY 85A LTD ITEM 6 SELECTED FINANCIAL (5)INDEX TO FINANCIAL STATEM (5)Balance Sheet (8)Income Statement (10) STATEMENTS OF PARTNERS CAP (8)Cash Flows (9)NOTE 4 INCOME TAXES (6)! NOTE 5 OIL AND GAS PRODUC (16)! NOTE 5 OIL AND GAS PRODUC (17)! 16 PAGE 375 NOTE 6 RELATED PAR! 16 PAGE 375 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (9) NOTE 7 OIL AND GAS INFORM (10) NOTE 7 OIL AND GAS INFORM (11)!18 PAGE 377 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (5)Beneficial Ownership (5)PARKER PARSLEY 85A LTD (1)INDEX TO EXHIBITS (5)SELECTED FINANCIAL DATA (8) SUPPLEMENTAL INFORMATION T (9)PARKER PARSLEY 85B LTD ITEM 6 SELECTED FINANCIAL (6)!7 PAGE 396 ITEM 8 FINANCIAL STABalance Sheet (9) STATEMENTS OF PARTNERS CAP (9)Cash Flows (10)!15 PAGE 404 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (18)! NOTE 5 OIL AND GAS PRODUC (19)! 16 PAGE 405 NOTE 6 RELATED PAR! 16 PAGE 405 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (12) NOTE 7 OIL AND GAS INFORM (13) NOTE 7 OIL AND GAS INFORM (14)!18 PAGE 407 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (6)Beneficial Ownership (6)PARKER PARSLEY 85B LTD (1)INDEX TO EXHIBITS (6)SELECTED FINANCIAL DATA (9) SUPPLEMENTAL INFORMATION (10)Balance Sheet (10)Income Statement (11) STATEMENTS OF PARTNERS CA (10)Cash Flows (11)NOTE 4 INCOME TAXES (7)! NOTE 5 OIL AND GAS PRODUC (20)! NOTE 5 OIL AND GAS PRODUC (21)! 9 PAGE 428 NOTE 6 RELATED PART! 9 PAGE 428 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (15) NOTE 7 OIL AND GAS INFORM (16) NOTE 7 OIL AND GAS INFORM (17)! 11 PAGE 430 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (10) SUPPLEMENTAL INFORMATION (11)Balance Sheet (11)Income Statement (12) STATEMENTS OF PARTNERS CA (11)Cash Flows (12) 8 PAGE 446 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (22)! NOTE 5 OIL AND GAS PRODUC (23)! 9 PAGE 447 NOTE 6 RELATED PART! 9 PAGE 447 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (18) NOTE 7 OIL AND GAS INFORM (19) NOTE 7 OIL AND GAS INFORM (20)! 11 PAGE 449 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (11) SUPPLEMENTAL INFORMATION (12)PARKER PARSLEY 86A LTD ITEM 6 SELECTED FINANCIAL (7)INDEX TO FINANCIAL STATEM (6)Balance Sheet (12)Income Statement (13) STATEMENTS OF PARTNERS CA (12)Cash Flows (13)NOTE 4 INCOME TAXES (8)! NOTE 5 OIL AND GAS PRODUC (24)! NOTE 5 OIL AND GAS PRODUC (25)! 16 PAGE 473 NOTE 6 RELATED PAR! 16 PAGE 473 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (21) NOTE 7 OIL AND GAS INFORM (22) NOTE 7 OIL AND GAS INFORM (23)!18 PAGE 475 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (7)Beneficial Ownership (7)PARKER PARSLEY 86A LTD (1)INDEX TO EXHIBITS (7)SELECTED FINANCIAL DATA (12) SUPPLEMENTAL INFORMATION (13)PARKER PARSLEY 86B LTD ITEM 6 SELECTED FINANCIAL (8)INDEX TO FINANCIAL STATEM (7)Balance Sheet (13)Income Statement (14) STATEMENTS OF PARTNERS CA (13)Cash Flows (14)!16 PAGE 503 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (26)! NOTE 5 OIL AND GAS PRODUC (27)! NOTE 6 RELATED PARTY TRANS (4)! NOTE 6 RELATED PARTY TRANS (5) NOTE 7 OIL AND GAS INFORM (24) NOTE 7 OIL AND GAS INFORM (25) NOTE 7 OIL AND GAS INFORM (26)!19 PAGE 506 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (8)Beneficial Ownership (8)PARKER PARSLEY 86B LTD (1)INDEX TO EXHIBITS (8)SELECTED FINANCIAL DATA (13) SUPPLEMENTAL INFORMATION (14) ITEM 6 SELECTED FINANCIAL (9)!7 PAGE 525 ITEM 8 FINANCIAL STABalance Sheet (14)Income Statement (15) STATEMENTS OF PARTNERS CA (14)Cash Flows (15)NOTE 4 INCOME TAXES (9)! NOTE 5 OIL AND GAS PRODUC (28)! NOTE 5 OIL AND GAS PRODUC (29)! 16 PAGE 534 NOTE 6 RELATED PAR! 16 PAGE 534 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (27) NOTE 7 OIL AND GAS INFORM (28) NOTE 7 OIL AND GAS INFORM (29)!18 PAGE 536 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (9)Beneficial Ownership (9)PARKER PARSLEY 86C LTDSELECTED FINANCIAL DATA (14) SUPPLEMENTAL INFORMATION (15)Balance Sheet (15)Income Statement (16) STATEMENTS OF PARTNERS CA (15)Cash Flows (16) 8 PAGE 556 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (30)! NOTE 5 OIL AND GAS PRODUC (31)! NOTE 6 RELATED PARTY TRANS (6)! NOTE 6 RELATED PARTY TRANS (7) NOTE 7 OIL AND GAS INFORM (30) NOTE 7 OIL AND GAS INFORM (31) NOTE 7 OIL AND GAS INFORM (32)! 11 PAGE 559 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (15) SUPPLEMENTAL INFORMATION (16)Balance Sheet (16)Income Statement (17) STATEMENTS OF PARTNERS CA (16)Cash Flows (17)NOTE 4 INCOME TAXES (10)! NOTE 5 OIL AND GAS PRODUC (32)! NOTE 5 OIL AND GAS PRODUC (33)! 9 PAGE 576 NOTE 6 RELATED PART! 9 PAGE 576 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (33) NOTE 7 OIL AND GAS INFORM (34) NOTE 7 OIL AND GAS INFORM (35)!11 PAGE 578 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (16) SUPPLEMENTAL INFORMATION (17) ITEM 6 SELECTED FINANCIAL (10)!8 PAGE 594 ITEM 8 FINANCIAL STABalance Sheet (17)Income Statement (18) STATEMENTS OF PARTNERS CA (17)Cash Flows (18)NOTE 4 INCOME TAXES (11)! NOTE 5 OIL AND GAS PRODUC (34)! NOTE 5 OIL AND GAS PRODUC (35)! 17 PAGE 603 NOTE 6 RELATED PAR! 17 PAGE 603 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (36) NOTE 7 OIL AND GAS INFORM (37) NOTE 7 OIL AND GAS INFORM (38)! 19 PAGE 605 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (10)Beneficial Ownership (10)PARKER PARSLEY 87A LTDSELECTED FINANCIAL DATA (17) SUPPLEMENTAL INFORMATION (18)Balance Sheet (18)Income Statement (19) STATEMENTS OF PARTNERS CA (18)Cash Flows (19) 8 PAGE 625 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (36)! NOTE 5 OIL AND GAS PRODUC (37)! 9 PAGE 626 NOTE 6 RELATED PART! 9 PAGE 626 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (39) NOTE 7 OIL AND GAS INFORM (40) NOTE 7 OIL AND GAS INFORM (41)! 11 PAGE 628 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (18) SUPPLEMENTAL INFORMATION (19) ITEM 6 SELECTED FINANCIAL (11)INDEX TO FINANCIAL STATEM (8)Balance Sheet (19)Income Statement (20) STATEMENTS OF PARTNERS CA (19)Cash Flows (20)NOTE 4 INCOME TAXES (12)! NOTE 5 OIL AND GAS PRODUC (38)! NOTE 5 OIL AND GAS PRODUC (39)! 17 PAGE 653 NOTE 6 RELATED PAR! 17 PAGE 653 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (42) NOTE 7 OIL AND GAS INFORM (43) NOTE 7 OIL AND GAS INFORM (44)! 19 PAGE 655 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (11)Beneficial Ownership (11)PARKER PARSLEY 87B LTDINDEX TO EXHIBITS (9)SELECTED FINANCIAL DATA (19) SUPPLEMENTAL INFORMATION (20) ITEM 6 SELECTED FINANCIAL (12)INDEX TO FINANCIAL STATEM (9)Balance Sheet (20)Income Statement (21) STATEMENTS OF PARTNERS CA (20)Cash Flows (21)!16 PAGE 683 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (40)! NOTE 5 OIL AND GAS PRODUC (41)! NOTE 6 RELATED PARTY TRANS (8)! NOTE 6 RELATED PARTY TRANS (9) NOTE 7 OIL AND GAS INFORM (45) NOTE 7 OIL AND GAS INFORM (46) NOTE 7 OIL AND GAS INFORM (47)!19 PAGE 686 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (12)Beneficial Ownership (12)PROPERTIES 87A LTDINDEX TO EXHIBITS (10)SELECTED FINANCIAL DATA (20) SUPPLEMENTAL INFORMATION (21) ITEM 6 SELECTED FINANCIAL (13)INDEX TO FINANCIAL STATE (10)Balance Sheet (21)Income Statement (22) STATEMENTS OF PARTNERS CA (21)Cash Flows (22)!16 PAGE 714 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (42)! NOTE 5 OIL AND GAS PRODUC (43)! 17 PAGE 715 NOTE 6 RELATED PAR! 17 PAGE 715 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (48) NOTE 7 OIL AND GAS INFORM (49) NOTE 7 OIL AND GAS INFORM (50)! 19 PAGE 717 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (13)Beneficial Ownership (13)PROPERTIES 87B LTDINDEX TO EXHIBITS (11)SELECTED FINANCIAL DATA (21) SUPPLEMENTAL INFORMATION (22)Balance Sheet (22)Income Statement (23) STATEMENTS OF PARTNERS CA (22)Cash Flows (23) 8 PAGE 737 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (44)! NOTE 5 OIL AND GAS PRODUC (45)! 9 PAGE 738 NOTE 6 RELATED PART! 9 PAGE 738 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (51) NOTE 7 OIL AND GAS INFORM (52) NOTE 7 OIL AND GAS INFORM (53)! 11 PAGE 740 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (22) SUPPLEMENTAL INFORMATION (23)Balance Sheet (23)Income Statement (24) STATEMENTS OF PARTNERS CA (23)Cash Flows (24) 8 PAGE 756 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (46)! NOTE 5 OIL AND GAS PRODUC (47)! 9 PAGE 757 NOTE 6 RELATED PART! 9 PAGE 757 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (54) NOTE 7 OIL AND GAS INFORM (55) NOTE 7 OIL AND GAS INFORM (56)! 11 PAGE 759 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (23)!31 2000 1 PAGE 766 PARKER PARSLPARKER PARSLEY 88A LP ITEM 6 SELECTED FINANCIAL (14)INDEX TO FINANCIAL STATE (11)Balance Sheet (24)Income Statement (25) STATEMENTS OF PARTNERS CA (24)Cash Flows (25)NOTE 4 INCOME TAXES (13)! NOTE 5 OIL AND GAS PRODUC (48)! NOTE 5 OIL AND GAS PRODUC (49)! 16 PAGE 783 NOTE 6 RELATED PAR! 16 PAGE 783 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (57) NOTE 7 OIL AND GAS INFORM (58) NOTE 7 OIL AND GAS INFORM (59)! 18 PAGE 785 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (14)Beneficial Ownership (14)PARKER PARSLEY 88A LP (1)INDEX TO EXHIBITS (12)SELECTED FINANCIAL DATA (24) SUPPLEMENTAL INFORMATION (24)Balance Sheet (25)Income Statement (26) STATEMENTS OF PARTNERS CA (25)Cash Flows (26) 8 PAGE 805 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (50)! NOTE 5 OIL AND GAS PRODUC (51)! 9 PAGE 806 NOTE 6 RELATED PART! 9 PAGE 806 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (60) NOTE 7 OIL AND GAS INFORM (61) NOTE 7 OIL AND GAS INFORM (62)! 11 PAGE 808 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (25)!31 2000 1 PAGE 815 PARKER PARSLPARKER PARSLEY 88B LP ITEM 6 SELECTED FINANCIAL (15)INDEX TO FINANCIAL STATE (12)Balance Sheet (26)Income Statement (27) STATEMENTS OF PARTNERS CA (26)Cash Flows (27)!16 PAGE 832 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (52)! NOTE 5 OIL AND GAS PRODUC (53)! 17 PAGE 833 NOTE 6 RELATED PAR! 17 PAGE 833 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (63) NOTE 7 OIL AND GAS INFORM (64) NOTE 7 OIL AND GAS INFORM (65)! 19 PAGE 835 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (15)Beneficial Ownership (15)PARKER PARSLEY 88B LP (1)INDEX TO EXHIBITS (13)SELECTED FINANCIAL DATA (26) SUPPLEMENTAL INFORMATION (25)Balance Sheet (27)Income Statement (28) STATEMENTS OF PARTNERS CA (27)Cash Flows (28) 8 PAGE 855 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (54)! NOTE 5 OIL AND GAS PRODUC (55)! 9 PAGE 856 NOTE 6 RELATED PART! 9 PAGE 856 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (66) NOTE 7 OIL AND GAS INFORM (67) NOTE 7 OIL AND GAS INFORM (68)! 11 PAGE 858 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (27)!31 2000 1 PAGE 865 PARKER PARSLBalance Sheet (28)Income Statement (29) STATEMENTS OF PARTNERS CA (28)Cash Flows (29) 8 PAGE 874 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (56)! NOTE 5 OIL AND GAS PRODUC (57)! 9 PAGE 875 NOTE 6 RELATED PART! 9 PAGE 875 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (69) NOTE 7 OIL AND GAS INFORM (70) NOTE 7 OIL AND GAS INFORM (71)! 11 PAGE 877 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (28) SUPPLEMENTAL INFORMATION (26)!PARKER PARSLEY PRODUCING PROPER ITEM 6 SELECTED FINANCIAL (16)INDEX TO FINANCIAL STATE (13)Balance Sheet (29)Income Statement (30) STATEMENTS OF PARTNERS CA (29)Cash Flows (30)NOTE 4 INCOME TAXES (14)! NOTE 5 OIL AND GAS PRODUC (58)! NOTE 5 OIL AND GAS PRODUC (59)! 16 PAGE 901 NOTE 6 RELATED PAR! 16 PAGE 901 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (72) NOTE 7 OIL AND GAS INFORM (73)!18 PAGE 903 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (16)Beneficial Ownership (16)PROPERTIES 88A LPINDEX TO EXHIBITS (14)SELECTED FINANCIAL DATA (29) SUPPLEMENTAL INFORMATION (27)Balance Sheet (30)Income Statement (31) STATEMENTS OF PARTNERS CA (30)Cash Flows (31)NOTE 4 INCOME TAXES (15)! NOTE 5 OIL AND GAS PRODUC (60)! NOTE 5 OIL AND GAS PRODUC (61)! 9 PAGE 924 NOTE 6 RELATED PART! 9 PAGE 924 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (74) NOTE 7 OIL AND GAS INFORM (75) NOTE 7 OIL AND GAS INFORM (76)! 11 PAGE 926 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (30) SUPPLEMENTAL INFORMATION (28)Balance Sheet (31)Income Statement (32) STATEMENTS OF PARTNERS CA (31)Cash Flows (32)NOTE 4 INCOME TAXES (16)! NOTE 5 OIL AND GAS PRODUC (62)! NOTE 5 OIL AND GAS PRODUC (63)! 9 PAGE 943 NOTE 6 RELATED PART! 9 PAGE 943 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (77) NOTE 7 OIL AND GAS INFORM (78) NOTE 7 OIL AND GAS INFORM (79)!11 PAGE 945 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (31)!31 2000 1 PAGE 952 PARKER PARSLPARKER PARSLEY 89A LP ITEM 6 SELECTED FINANCIAL (17)INDEX TO FINANCIAL STATE (14)Balance Sheet (32)Income Statement (33) STATEMENTS OF PARTNERS CA (32)Cash Flows (33)NOTE 4 INCOME TAXES (17)! NOTE 5 OIL AND GAS PRODUC (64)! NOTE 5 OIL AND GAS PRODUC (65)! 16 PAGE 969 NOTE 6 RELATED PAR! 16 PAGE 969 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (80) NOTE 7 OIL AND GAS INFORM (81) NOTE 7 OIL AND GAS INFORM (82) NOTE 7 OIL AND GAS INFORM (83)! 18 PAGE 971 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (17)Beneficial Ownership (17)PARKER PARSLEY 89A LP (1)INDEX TO EXHIBITS (15)SELECTED FINANCIAL DATA (32) SUPPLEMENTAL INFORMATION (29)Balance Sheet (33)Income Statement (34) STATEMENTS OF PARTNERS CA (33)Cash Flows (34) 8 PAGE 991 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (66)! NOTE 5 OIL AND GAS PRODUC (67)! 9 PAGE 992 NOTE 6 RELATED PART! 9 PAGE 992 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (84) NOTE 7 OIL AND GAS INFORM (85) NOTE 7 OIL AND GAS INFORM (86)! 11 PAGE 994 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (33)!31 2000 1 PAGE 1001 PARKER PARSBalance Sheet (34)Income Statement (35) STATEMENTS OF PARTNERS CA (34)Cash Flows (35)!8 PAGE 1010 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (68)! NOTE 5 OIL AND GAS PRODUC (69)! 9 PAGE 1011 NOTE 6 RELATED PAR! 9 PAGE 1011 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (87) NOTE 7 OIL AND GAS INFORM (88) NOTE 7 OIL AND GAS INFORM (89)!11 PAGE 1013 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (34) SUPPLEMENTAL INFORMATION (30)Balance Sheet (35)Income Statement (36) STATEMENTS OF PARTNERS CA (35)Cash Flows (36)!8 PAGE 1029 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (70)! NOTE 5 OIL AND GAS PRODUC (71)! 9 PAGE 1030 NOTE 6 RELATED PAR! 9 PAGE 1030 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (90) NOTE 7 OIL AND GAS INFORM (91) NOTE 7 OIL AND GAS INFORM (92)! 11 PAGE 1032 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (35) SUPPLEMENTAL INFORMATION (31)Balance Sheet (36)Income Statement (37) STATEMENTS OF PARTNERS CA (36)Cash Flows (37)!8 PAGE 1048 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (72)! NOTE 5 OIL AND GAS PRODUC (73)! 9 PAGE 1049 NOTE 6 RELATED PAR! 9 PAGE 1049 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (93) NOTE 7 OIL AND GAS INFORM (94) NOTE 7 OIL AND GAS INFORM (95)! 11 PAGE 1051 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (36)!31 2000 1 PAGE 1058 PARKER PARSPARKER PARSLEY 90A LP ITEM 6 SELECTED FINANCIAL (18)INDEX TO FINANCIAL STATE (15)Balance Sheet (37)Income Statement (38) STATEMENTS OF PARTNERS CA (37)Cash Flows (38)!15 PAGE 1074 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (74)! NOTE 5 OIL AND GAS PRODUC (75)! NOTE 6 RELATED PARTY TRAN (10)! NOTE 6 RELATED PARTY TRAN (11) NOTE 7 OIL AND GAS INFORM (96) NOTE 7 OIL AND GAS INFORM (97)! 18 PAGE 1077 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (18)Beneficial Ownership (18)PARKER PARSLEY 90A LP (1)INDEX TO EXHIBITS (16)SELECTED FINANCIAL DATA (37) SUPPLEMENTAL INFORMATION (32)PARKER PARSLEY 90B CONV LP ITEM 6 SELECTED FINANCIAL (19)INDEX TO FINANCIAL STATE (16)Balance Sheet (38)Income Statement (39) STATEMENTS OF PARTNERS CA (38)Cash Flows (39)!16 PAGE 1105 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (76)! NOTE 5 OIL AND GAS PRODUC (77)! NOTE 6 RELATED PARTY TRAN (12)! NOTE 6 RELATED PARTY TRAN (13) NOTE 7 OIL AND GAS INFORM (98) NOTE 7 OIL AND GAS INFORM (99) NOTE 7 OIL AND GAS INFOR (100)! 19 PAGE 1108 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (19)Beneficial Ownership (19) PARKER PARSLEY 90B CONV LP (1)INDEX TO EXHIBITS (17)SELECTED FINANCIAL DATA (38)!31 2000 1 PAGE 1119 PARKER PARSPARKER PARSLEY 90B LP ITEM 6 SELECTED FINANCIAL (20)INDEX TO FINANCIAL STATE (17)Balance Sheet (39)Income Statement (40) STATEMENTS OF PARTNERS CA (39)Cash Flows (40)!16 PAGE 1136 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (78)! NOTE 5 OIL AND GAS PRODUC (79)! NOTE 6 RELATED PARTY TRAN (14)! NOTE 6 RELATED PARTY TRAN (15) NOTE 7 OIL AND GAS INFOR (101) NOTE 7 OIL AND GAS INFOR (102) NOTE 7 OIL AND GAS INFOR (103)! 19 PAGE 1139 NOTE 8 MAJOR CUS!ITEM 10 DIRECTORS AND EXEC (20)Beneficial Ownership (20)PARKER PARSLEY 90B LP (1)INDEX TO EXHIBITS (18)SELECTED FINANCIAL DATA (39) SUPPLEMENTAL INFORMATION (33)PARKER PARSLEY 90C CONV LP ITEM 6 SELECTED FINANCIAL (21)INDEX TO FINANCIAL STATE (18)Balance Sheet (40)Income Statement (41) STATEMENTS OF PARTNERS CA (40)Cash Flows (41)!15 PAGE 1166 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (80)! NOTE 5 OIL AND GAS PRODUC (81)! NOTE 6 RELATED PARTY TRAN (16)! NOTE 6 RELATED PARTY TRAN (17) NOTE 7 OIL AND GAS INFOR (104) NOTE 7 OIL AND GAS INFOR (105) NOTE 7 OIL AND GAS INFOR (106)! 18 PAGE 1169 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (21)Beneficial Ownership (21) PARKER PARSLEY 90C CONV LP (1)INDEX TO EXHIBITS (19)SELECTED FINANCIAL DATA (40)!31 2000 1 PAGE 1180 PARKER PARSPARKER PARSLEY 90C LP ITEM 6 SELECTED FINANCIAL (22)INDEX TO FINANCIAL STATE (19)Balance Sheet (41)Income Statement (42) STATEMENTS OF PARTNERS CA (41)Cash Flows (42)!15 PAGE 1196 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (82)! NOTE 5 OIL AND GAS PRODUC (83)! NOTE 6 RELATED PARTY TRAN (18)! NOTE 6 RELATED PARTY TRAN (19) NOTE 7 OIL AND GAS INFOR (107) NOTE 7 OIL AND GAS INFOR (108) NOTE 7 OIL AND GAS INFOR (109)! 18 PAGE 1199 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (22)Beneficial Ownership (22)PARKER PARSLEY 90C LP (1)INDEX TO EXHIBITS (20)SELECTED FINANCIAL DATA (41) SUPPLEMENTAL INFORMATION (34)Balance Sheet (42)Income Statement (43) STATEMENTS OF PARTNERS CA (42)Cash Flows (43)!8 PAGE 1219 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (84)! NOTE 5 OIL AND GAS PRODUC (85)! 9 PAGE 1220 NOTE 6 RELATED PAR! 9 PAGE 1220 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (110) NOTE 7 OIL AND GAS INFOR (111) NOTE 7 OIL AND GAS INFOR (112)! 11 PAGE 1222 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (42) SUPPLEMENTAL INFORMATION (35)Balance Sheet (43)Income Statement (44) STATEMENTS OF PARTNERS CA (43)Cash Flows (44)!8 PAGE 1238 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (86)! NOTE 5 OIL AND GAS PRODUC (87)! 9 PAGE 1239 NOTE 6 RELATED PAR! 9 PAGE 1239 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (113) NOTE 7 OIL AND GAS INFOR (114) NOTE 7 OIL AND GAS INFOR (115)! 11 PAGE 1241 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (43)!31 2000 1 PAGE 1248 PARKER PARSPARKER PARSLEY 91A LP ITEM 6 SELECTED FINANCIAL (23)INDEX TO FINANCIAL STATE (20)Balance Sheet (44)Income Statement (45) STATEMENTS OF PARTNERS CA (44)Cash Flows (45)!15 PAGE 1264 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (88)! NOTE 5 OIL AND GAS PRODUC (89)! NOTE 6 RELATED PARTY TRAN (20)! NOTE 6 RELATED PARTY TRAN (21) NOTE 7 OIL AND GAS INFOR (116) NOTE 7 OIL AND GAS INFOR (117) NOTE 7 OIL AND GAS INFOR (118)! 18 PAGE 1267 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (23)Beneficial Ownership (23)PARKER PARSLEY 91A LP (1)INDEX TO EXHIBITS (21)SELECTED FINANCIAL DATA (44)!31 2000 1 PAGE 1278 PARKER PARSPARKER PARSLEY 91B LP ITEM 6 SELECTED FINANCIAL (24)INDEX TO FINANCIAL STATE (21)Balance Sheet (45)Income Statement (46) STATEMENTS OF PARTNERS CA (45)Cash Flows (46)!15 PAGE 1294 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (90)! NOTE 5 OIL AND GAS PRODUC (91)! NOTE 6 RELATED PARTY TRAN (22)! NOTE 6 RELATED PARTY TRAN (23) NOTE 7 OIL AND GAS INFOR (119) NOTE 7 OIL AND GAS INFOR (120) NOTE 7 OIL AND GAS INFOR (121)! 18 PAGE 1297 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (24)Beneficial Ownership (24)PARKER PARSLEY 91B LP (1)INDEX TO EXHIBITS (22)SELECTED FINANCIAL DATA (45)POWER OF ATTORNEYPOWER OF ATTORNEY (1)POWER OF ATTORNEY (2)POWER OF ATTORNEY (3)POWER OF ATTORNEY (4)POWER OF ATTORNEY (5)POWER OF ATTORNEY (6)POWER OF ATTORNEY (7)!2001 THE BOARD OF DIRECTORS REC!2001 THE BOARD OF DIRECTORS (1)!2001 THE BOARD OF DIRECTORS (2)PAGE 2U } mB} a     $PIONEER NATURAL RESOURCES CO S-4 04/17/2001!THE DRILLING PARTNERSHIPS NAME STATE OF FORMATION   ?7Parker & Parsley 90 Spraberry Private Development, L.P.Delaware#Parker & Parsley 91-A, L.P.Delaware#Parker & Parsley 91-B, L.P.Delaware$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/.vj^R$ n3'=PF0*8X> @ l  [ dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/?? SECURITIES AND EXC!CALCULATION OF REGISTRATION FEETO BE HELD ON 2001TABLE OF CONTENTSPAGE 7 LIST OF APPENDICES!LIMITED PARTNER INVESTMENT REPA!LIMITED PARTNER INVESTMENT (1) 5 PAGE 15 NYMEX FUTURES PRICES!EXAMPLE CALCULATION OF MERGER VIncome StatementIncome Statement (1)AT DECEMBER 31 2000!15 PAGE 25 COMPARATIVE PER SHAR!25 PAGE 35 REASONS FOR THE MERGFAIRNESS OPINIONFAIRNESS OPINION (1)!LEGAL OPINION FOR LIMITED PARTN!LEGAL OPINION FOR LIMITED P (1)!NONMANAGING GENERAL PARTNERS OF!49 PAGE 59 PAYMENT OF EXPENSES !58 PAGE 68 COMPARATIVE PER SHAR!60 PAGE 70 OWNERSHIP OF PARTNER PIONEER PIONEER USATHE DRILLING PARTNERSHIPSTHE DRILLING PARTNERSHIPS (1) INTERESTSINTERESTS (1)INTERESTS (2)INTERESTS (3)INTERESTS (4)INTERESTS (5)!WHERE YOU CAN FIND MORE INFORMAAS OF DECEMBER 31 2000YEAR ENDED DECEMBER 31 2000!QUANTITIES OF OIL AND GAS RESER!STANDARDIZED MEASURE OF DISCOUN CASH FLOWSAS OF MARCH 31 2001AS OF MARCH 31 2001 (1)AS OF MARCH 31 2001 (2)AS OF MARCH 31 2001 (3)AS OF MARCH 31 2001 (4)AS OF MARCH 31 2001 (5)!FROM INCEPTION THROUGH MARCH 31!ANNUAL REPURCHASE PRICES AND AGOF EACH PARTNERSHIP!FOR THE THREE MONTHS ENDED MARCAS OF DECEMBER 31 2000 (1)AS OF MARCH 31 2001 (6)!THE YEARS ENDED DECEMBER 31 200AS OF DECEMBER 31 2000 (2)DECEMBER 31 2000 AND 1999EFFECTIVE DECEMBER 31 2000 EFFECTIVE DECEMBER 31 2000 (1) RECITALS RECITALS (1) SUPPLEMENTAL INFORMATION TABLEBalance SheetIncome Statement (2) STATEMENTS OF PARTNERS CAPITALCash Flows (1)NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCING A! NOTE 5 OIL AND GAS PRODUCI (1)! NOTE 6 RELATED PARTY TRANSACTI! NOTE 6 RELATED PARTY TRANS (1)! NOTE 7 OIL AND GAS INFORMATION! NOTE 7 OIL AND GAS INFORMA (1)! NOTE 7 OIL AND GAS INFORMA (2)!11 PAGE 163 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA SUPPLEMENTAL INFORMATION T (1)Balance Sheet (1)Income Statement (3) STATEMENTS OF PARTNERS CAP (1)Cash Flows (2)NOTE 4 INCOME TAXES (1)! NOTE 5 OIL AND GAS PRODUCI (2)! NOTE 5 OIL AND GAS PRODUCI (3)! 9 PAGE 180 NOTE 6 RELATED PAR! 9 PAGE 180 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORMA (3)! NOTE 7 OIL AND GAS INFORMA (4)! NOTE 7 OIL AND GAS INFORMA (5)!11 PAGE 182 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (1) SUPPLEMENTAL INFORMATION T (2) ITEM 6 SELECTED FINANCIAL DATAINDEX TO FINANCIAL STATEMENTSBalance Sheet (2)Income Statement (4) STATEMENTS OF PARTNERS CAP (2)Cash Flows (3)!15 PAGE 205 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCI (4)! NOTE 5 OIL AND GAS PRODUCI (5)! NOTE 6 RELATED PARTY TRANS (2)! NOTE 6 RELATED PARTY TRANS (3)! NOTE 7 OIL AND GAS INFORMA (6)! NOTE 7 OIL AND GAS INFORMA (7)! NOTE 7 OIL AND GAS INFORMA (8)! NOTE 7 OIL AND GAS INFORMA (9)! NOTE 7 OIL AND GAS INFORM (10)! 18 PAGE 208 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECUTIVEBeneficial OwnershipPARKER PARSLEY 82I LTDINDEX TO EXHIBITSSELECTED FINANCIAL DATA (2) SUPPLEMENTAL INFORMATION T (3) ITEM 6 SELECTED FINANCIAL (1)INDEX TO FINANCIAL STATEM (1)Balance Sheet (3)Income Statement (5) STATEMENTS OF PARTNERS CAP (3)Cash Flows (4)NOTE 4 INCOME TAXES (2)! NOTE 5 OIL AND GAS PRODUCI (6)! NOTE 5 OIL AND GAS PRODUCI (7)! 16 PAGE 236 NOTE 6 RELATED PAR! 16 PAGE 236 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (11)! NOTE 7 OIL AND GAS INFORM (12)! NOTE 7 OIL AND GAS INFORM (13)!18 PAGE 238 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (1)Beneficial Ownership (1)PARKER PARSLEY 82II LTDINDEX TO EXHIBITS (1)SELECTED FINANCIAL DATA (3) SUPPLEMENTAL INFORMATION T (4)Balance Sheet (4)Income Statement (6) STATEMENTS OF PARTNERS CAP (4)Cash Flows (5)NOTE 4 INCOME TAXES (3)! NOTE 5 OIL AND GAS PRODUCI (8)! NOTE 5 OIL AND GAS PRODUCI (9)! 9 PAGE 259 NOTE 6 RELATED PART! 9 PAGE 259 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (14)! NOTE 7 OIL AND GAS INFORM (15)! NOTE 7 OIL AND GAS INFORM (16)!11 PAGE 261 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (4) SUPPLEMENTAL INFORMATION T (5)PARKER PARSLEY 83A LTD ITEM 6 SELECTED FINANCIAL (2)INDEX TO FINANCIAL STATEM (2)Balance Sheet (5)Income Statement (7) STATEMENTS OF PARTNERS CAP (5)Cash Flows (6)NOTE 4 INCOME TAXES (4)! NOTE 5 OIL AND GAS PRODUC (10)! NOTE 5 OIL AND GAS PRODUC (11)! 16 PAGE 285 NOTE 6 RELATED PAR! 16 PAGE 285 NOTE 6 RELATED (1)!NOTE 7 OIL AND GAS INFORMATION  NOTE 7 OIL AND GAS INFORMA (1) NOTE 7 OIL AND GAS INFORMA (2)! 18 PAGE 287 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECU (2)Beneficial Ownership (2)PARKER PARSLEY 83A LTD (1)INDEX TO EXHIBITS (2)SELECTED FINANCIAL DATA (5) SUPPLEMENTAL INFORMATION T (6)PARKER PARSLEY 83B LTD ITEM 6 SELECTED FINANCIAL (3)INDEX TO FINANCIAL STATEM (3)Balance Sheet (6)Income Statement (8) STATEMENTS OF PARTNERS CAP (6)Cash Flows (7)NOTE 4 INCOME TAXES (5)! NOTE 5 OIL AND GAS PRODUC (12)! NOTE 5 OIL AND GAS PRODUC (13)! 16 PAGE 315 NOTE 6 RELATED PAR! 16 PAGE 315 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (3) NOTE 7 OIL AND GAS INFORMA (4) NOTE 7 OIL AND GAS INFORMA (5)!18 PAGE 317 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (3)Beneficial Ownership (3)PARKER PARSLEY 83B LTD (1)INDEX TO EXHIBITS (3)SELECTED FINANCIAL DATA (6) SUPPLEMENTAL INFORMATION T (7)PARKER PARSLEY 84A LTD ITEM 6 SELECTED FINANCIAL (4)INDEX TO FINANCIAL STATEM (4)Balance Sheet (7)Income Statement (9) STATEMENTS OF PARTNERS CAP (7)Cash Flows (8)!15 PAGE 344 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (14)! NOTE 5 OIL AND GAS PRODUC (15)! 16 PAGE 345 NOTE 6 RELATED PAR! 16 PAGE 345 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (6) NOTE 7 OIL AND GAS INFORMA (7) NOTE 7 OIL AND GAS INFORMA (8)!18 PAGE 347 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (4)Beneficial Ownership (4)PARKER PARSLEY 84A LTD (1)INDEX TO EXHIBITS (4)SELECTED FINANCIAL DATA (7) SUPPLEMENTAL INFORMATION T (8)PARKER PARSLEY 85A LTD ITEM 6 SELECTED FINANCIAL (5)INDEX TO FINANCIAL STATEM (5)Balance Sheet (8)Income Statement (10) STATEMENTS OF PARTNERS CAP (8)Cash Flows (9)NOTE 4 INCOME TAXES (6)! NOTE 5 OIL AND GAS PRODUC (16)! NOTE 5 OIL AND GAS PRODUC (17)! 16 PAGE 375 NOTE 6 RELATED PAR! 16 PAGE 375 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (9) NOTE 7 OIL AND GAS INFORM (10) NOTE 7 OIL AND GAS INFORM (11)!18 PAGE 377 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (5)Beneficial Ownership (5)PARKER PARSLEY 85A LTD (1)INDEX TO EXHIBITS (5)SELECTED FINANCIAL DATA (8) SUPPLEMENTAL INFORMATION T (9)PARKER PARSLEY 85B LTD ITEM 6 SELECTED FINANCIAL (6)!7 PAGE 396 ITEM 8 FINANCIAL STABalance Sheet (9) STATEMENTS OF PARTNERS CAP (9)Cash Flows (10)!15 PAGE 404 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (18)! NOTE 5 OIL AND GAS PRODUC (19)! 16 PAGE 405 NOTE 6 RELATED PAR! 16 PAGE 405 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (12) NOTE 7 OIL AND GAS INFORM (13) NOTE 7 OIL AND GAS INFORM (14)!18 PAGE 407 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (6)Beneficial Ownership (6)PARKER PARSLEY 85B LTD (1)INDEX TO EXHIBITS (6)SELECTED FINANCIAL DATA (9) SUPPLEMENTAL INFORMATION (10)Balance Sheet (10)Income Statement (11) STATEMENTS OF PARTNERS CA (10)Cash Flows (11)NOTE 4 INCOME TAXES (7)! NOTE 5 OIL AND GAS PRODUC (20)! NOTE 5 OIL AND GAS PRODUC (21)! 9 PAGE 428 NOTE 6 RELATED PART! 9 PAGE 428 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (15) NOTE 7 OIL AND GAS INFORM (16) NOTE 7 OIL AND GAS INFORM (17)! 11 PAGE 430 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (10) SUPPLEMENTAL INFORMATION (11)Balance Sheet (11)Income Statement (12) STATEMENTS OF PARTNERS CA (11)Cash Flows (12) 8 PAGE 446 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (22)! NOTE 5 OIL AND GAS PRODUC (23)! 9 PAGE 447 NOTE 6 RELATED PART! 9 PAGE 447 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (18) NOTE 7 OIL AND GAS INFORM (19) NOTE 7 OIL AND GAS INFORM (20)! 11 PAGE 449 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (11) SUPPLEMENTAL INFORMATION (12)PARKER PARSLEY 86A LTD ITEM 6 SELECTED FINANCIAL (7)INDEX TO FINANCIAL STATEM (6)Balance Sheet (12)Income Statement (13) STATEMENTS OF PARTNERS CA (12)Cash Flows (13)NOTE 4 INCOME TAXES (8)! NOTE 5 OIL AND GAS PRODUC (24)! NOTE 5 OIL AND GAS PRODUC (25)! 16 PAGE 473 NOTE 6 RELATED PAR! 16 PAGE 473 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (21) NOTE 7 OIL AND GAS INFORM (22) NOTE 7 OIL AND GAS INFORM (23)!18 PAGE 475 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (7)Beneficial Ownership (7)PARKER PARSLEY 86A LTD (1)INDEX TO EXHIBITS (7)SELECTED FINANCIAL DATA (12) SUPPLEMENTAL INFORMATION (13)PARKER PARSLEY 86B LTD ITEM 6 SELECTED FINANCIAL (8)INDEX TO FINANCIAL STATEM (7)Balance Sheet (13)Income Statement (14) STATEMENTS OF PARTNERS CA (13)Cash Flows (14)!16 PAGE 503 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (26)! NOTE 5 OIL AND GAS PRODUC (27)! NOTE 6 RELATED PARTY TRANS (4)! NOTE 6 RELATED PARTY TRANS (5) NOTE 7 OIL AND GAS INFORM (24) NOTE 7 OIL AND GAS INFORM (25) NOTE 7 OIL AND GAS INFORM (26)!19 PAGE 506 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (8)Beneficial Ownership (8)PARKER PARSLEY 86B LTD (1)INDEX TO EXHIBITS (8)SELECTED FINANCIAL DATA (13) SUPPLEMENTAL INFORMATION (14) ITEM 6 SELECTED FINANCIAL (9)!7 PAGE 525 ITEM 8 FINANCIAL STABalance Sheet (14)Income Statement (15) STATEMENTS OF PARTNERS CA (14)Cash Flows (15)NOTE 4 INCOME TAXES (9)! NOTE 5 OIL AND GAS PRODUC (28)! NOTE 5 OIL AND GAS PRODUC (29)! 16 PAGE 534 NOTE 6 RELATED PAR! 16 PAGE 534 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (27) NOTE 7 OIL AND GAS INFORM (28) NOTE 7 OIL AND GAS INFORM (29)!18 PAGE 536 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (9)Beneficial Ownership (9)PARKER PARSLEY 86C LTDSELECTED FINANCIAL DATA (14) SUPPLEMENTAL INFORMATION (15)Balance Sheet (15)Income Statement (16) STATEMENTS OF PARTNERS CA (15)Cash Flows (16) 8 PAGE 556 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (30)! NOTE 5 OIL AND GAS PRODUC (31)! NOTE 6 RELATED PARTY TRANS (6)! NOTE 6 RELATED PARTY TRANS (7) NOTE 7 OIL AND GAS INFORM (30) NOTE 7 OIL AND GAS INFORM (31) NOTE 7 OIL AND GAS INFORM (32)! 11 PAGE 559 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (15) SUPPLEMENTAL INFORMATION (16)Balance Sheet (16)Income Statement (17) STATEMENTS OF PARTNERS CA (16)Cash Flows (17)NOTE 4 INCOME TAXES (10)! NOTE 5 OIL AND GAS PRODUC (32)! NOTE 5 OIL AND GAS PRODUC (33)! 9 PAGE 576 NOTE 6 RELATED PART! 9 PAGE 576 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (33) NOTE 7 OIL AND GAS INFORM (34) NOTE 7 OIL AND GAS INFORM (35)!11 PAGE 578 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (16) SUPPLEMENTAL INFORMATION (17) ITEM 6 SELECTED FINANCIAL (10)!8 PAGE 594 ITEM 8 FINANCIAL STABalance Sheet (17)Income Statement (18) STATEMENTS OF PARTNERS CA (17)Cash Flows (18)NOTE 4 INCOME TAXES (11)! NOTE 5 OIL AND GAS PRODUC (34)! NOTE 5 OIL AND GAS PRODUC (35)! 17 PAGE 603 NOTE 6 RELATED PAR! 17 PAGE 603 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (36) NOTE 7 OIL AND GAS INFORM (37) NOTE 7 OIL AND GAS INFORM (38)! 19 PAGE 605 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (10)Beneficial Ownership (10)PARKER PARSLEY 87A LTDSELECTED FINANCIAL DATA (17) SUPPLEMENTAL INFORMATION (18)Balance Sheet (18)Income Statement (19) STATEMENTS OF PARTNERS CA (18)Cash Flows (19) 8 PAGE 625 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (36)! NOTE 5 OIL AND GAS PRODUC (37)! 9 PAGE 626 NOTE 6 RELATED PART! 9 PAGE 626 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (39) NOTE 7 OIL AND GAS INFORM (40) NOTE 7 OIL AND GAS INFORM (41)! 11 PAGE 628 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (18) SUPPLEMENTAL INFORMATION (19) ITEM 6 SELECTED FINANCIAL (11)INDEX TO FINANCIAL STATEM (8)Balance Sheet (19)Income Statement (20) STATEMENTS OF PARTNERS CA (19)Cash Flows (20)NOTE 4 INCOME TAXES (12)! NOTE 5 OIL AND GAS PRODUC (38)! NOTE 5 OIL AND GAS PRODUC (39)! 17 PAGE 653 NOTE 6 RELATED PAR! 17 PAGE 653 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (42) NOTE 7 OIL AND GAS INFORM (43) NOTE 7 OIL AND GAS INFORM (44)! 19 PAGE 655 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (11)Beneficial Ownership (11)PARKER PARSLEY 87B LTDINDEX TO EXHIBITS (9)SELECTED FINANCIAL DATA (19) SUPPLEMENTAL INFORMATION (20) ITEM 6 SELECTED FINANCIAL (12)INDEX TO FINANCIAL STATEM (9)Balance Sheet (20)Income Statement (21) STATEMENTS OF PARTNERS CA (20)Cash Flows (21)!16 PAGE 683 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (40)! NOTE 5 OIL AND GAS PRODUC (41)! NOTE 6 RELATED PARTY TRANS (8)! NOTE 6 RELATED PARTY TRANS (9) NOTE 7 OIL AND GAS INFORM (45) NOTE 7 OIL AND GAS INFORM (46) NOTE 7 OIL AND GAS INFORM (47)!19 PAGE 686 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (12)Beneficial Ownership (12)PROPERTIES 87A LTDINDEX TO EXHIBITS (10)SELECTED FINANCIAL DATA (20) SUPPLEMENTAL INFORMATION (21) ITEM 6 SELECTED FINANCIAL (13)INDEX TO FINANCIAL STATE (10)Balance Sheet (21)Income Statement (22) STATEMENTS OF PARTNERS CA (21)Cash Flows (22)!16 PAGE 714 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (42)! NOTE 5 OIL AND GAS PRODUC (43)! 17 PAGE 715 NOTE 6 RELATED PAR! 17 PAGE 715 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (48) NOTE 7 OIL AND GAS INFORM (49) NOTE 7 OIL AND GAS INFORM (50)! 19 PAGE 717 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (13)Beneficial Ownership (13)PROPERTIES 87B LTDINDEX TO EXHIBITS (11)SELECTED FINANCIAL DATA (21) SUPPLEMENTAL INFORMATION (22)Balance Sheet (22)Income Statement (23) STATEMENTS OF PARTNERS CA (22)Cash Flows (23) 8 PAGE 737 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (44)! NOTE 5 OIL AND GAS PRODUC (45)! 9 PAGE 738 NOTE 6 RELATED PART! 9 PAGE 738 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (51) NOTE 7 OIL AND GAS INFORM (52) NOTE 7 OIL AND GAS INFORM (53)! 11 PAGE 740 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (22) SUPPLEMENTAL INFORMATION (23)Balance Sheet (23)Income Statement (24) STATEMENTS OF PARTNERS CA (23)Cash Flows (24) 8 PAGE 756 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (46)! NOTE 5 OIL AND GAS PRODUC (47)! 9 PAGE 757 NOTE 6 RELATED PART! 9 PAGE 757 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (54) NOTE 7 OIL AND GAS INFORM (55) NOTE 7 OIL AND GAS INFORM (56)! 11 PAGE 759 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (23)!31 2000 1 PAGE 766 PARKER PARSLPARKER PARSLEY 88A LP ITEM 6 SELECTED FINANCIAL (14)INDEX TO FINANCIAL STATE (11)Balance Sheet (24)Income Statement (25) STATEMENTS OF PARTNERS CA (24)Cash Flows (25)NOTE 4 INCOME TAXES (13)! NOTE 5 OIL AND GAS PRODUC (48)! NOTE 5 OIL AND GAS PRODUC (49)! 16 PAGE 783 NOTE 6 RELATED PAR! 16 PAGE 783 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (57) NOTE 7 OIL AND GAS INFORM (58) NOTE 7 OIL AND GAS INFORM (59)! 18 PAGE 785 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (14)Beneficial Ownership (14)PARKER PARSLEY 88A LP (1)INDEX TO EXHIBITS (12)SELECTED FINANCIAL DATA (24) SUPPLEMENTAL INFORMATION (24)Balance Sheet (25)Income Statement (26) STATEMENTS OF PARTNERS CA (25)Cash Flows (26) 8 PAGE 805 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (50)! NOTE 5 OIL AND GAS PRODUC (51)! 9 PAGE 806 NOTE 6 RELATED PART! 9 PAGE 806 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (60) NOTE 7 OIL AND GAS INFORM (61) NOTE 7 OIL AND GAS INFORM (62)! 11 PAGE 808 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (25)!31 2000 1 PAGE 815 PARKER PARSLPARKER PARSLEY 88B LP ITEM 6 SELECTED FINANCIAL (15)INDEX TO FINANCIAL STATE (12)Balance Sheet (26)Income Statement (27) STATEMENTS OF PARTNERS CA (26)Cash Flows (27)!16 PAGE 832 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (52)! NOTE 5 OIL AND GAS PRODUC (53)! 17 PAGE 833 NOTE 6 RELATED PAR! 17 PAGE 833 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (63) NOTE 7 OIL AND GAS INFORM (64) NOTE 7 OIL AND GAS INFORM (65)! 19 PAGE 835 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (15)Beneficial Ownership (15)PARKER PARSLEY 88B LP (1)INDEX TO EXHIBITS (13)SELECTED FINANCIAL DATA (26) SUPPLEMENTAL INFORMATION (25)Balance Sheet (27)Income Statement (28) STATEMENTS OF PARTNERS CA (27)Cash Flows (28) 8 PAGE 855 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (54)! NOTE 5 OIL AND GAS PRODUC (55)! 9 PAGE 856 NOTE 6 RELATED PART! 9 PAGE 856 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (66) NOTE 7 OIL AND GAS INFORM (67) NOTE 7 OIL AND GAS INFORM (68)! 11 PAGE 858 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (27)!31 2000 1 PAGE 865 PARKER PARSLBalance Sheet (28)Income Statement (29) STATEMENTS OF PARTNERS CA (28)Cash Flows (29) 8 PAGE 874 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (56)! NOTE 5 OIL AND GAS PRODUC (57)! 9 PAGE 875 NOTE 6 RELATED PART! 9 PAGE 875 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (69) NOTE 7 OIL AND GAS INFORM (70) NOTE 7 OIL AND GAS INFORM (71)! 11 PAGE 877 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (28) SUPPLEMENTAL INFORMATION (26)!PARKER PARSLEY PRODUCING PROPER ITEM 6 SELECTED FINANCIAL (16)INDEX TO FINANCIAL STATE (13)Balance Sheet (29)Income Statement (30) STATEMENTS OF PARTNERS CA (29)Cash Flows (30)NOTE 4 INCOME TAXES (14)! NOTE 5 OIL AND GAS PRODUC (58)! NOTE 5 OIL AND GAS PRODUC (59)! 16 PAGE 901 NOTE 6 RELATED PAR! 16 PAGE 901 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (72) NOTE 7 OIL AND GAS INFORM (73)!18 PAGE 903 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (16)Beneficial Ownership (16)PROPERTIES 88A LPINDEX TO EXHIBITS (14)SELECTED FINANCIAL DATA (29) SUPPLEMENTAL INFORMATION (27)Balance Sheet (30)Income Statement (31) STATEMENTS OF PARTNERS CA (30)Cash Flows (31)NOTE 4 INCOME TAXES (15)! NOTE 5 OIL AND GAS PRODUC (60)! NOTE 5 OIL AND GAS PRODUC (61)! 9 PAGE 924 NOTE 6 RELATED PART! 9 PAGE 924 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (74) NOTE 7 OIL AND GAS INFORM (75) NOTE 7 OIL AND GAS INFORM (76)! 11 PAGE 926 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (30) SUPPLEMENTAL INFORMATION (28)Balance Sheet (31)Income Statement (32) STATEMENTS OF PARTNERS CA (31)Cash Flows (32)NOTE 4 INCOME TAXES (16)! NOTE 5 OIL AND GAS PRODUC (62)! NOTE 5 OIL AND GAS PRODUC (63)! 9 PAGE 943 NOTE 6 RELATED PART! 9 PAGE 943 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (77) NOTE 7 OIL AND GAS INFORM (78) NOTE 7 OIL AND GAS INFORM (79)!11 PAGE 945 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (31)!31 2000 1 PAGE 952 PARKER PARSLPARKER PARSLEY 89A LP ITEM 6 SELECTED FINANCIAL (17)INDEX TO FINANCIAL STATE (14)Balance Sheet (32)Income Statement (33) STATEMENTS OF PARTNERS CA (32)Cash Flows (33)NOTE 4 INCOME TAXES (17)! NOTE 5 OIL AND GAS PRODUC (64)! NOTE 5 OIL AND GAS PRODUC (65)! 16 PAGE 969 NOTE 6 RELATED PAR! 16 PAGE 969 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (80) NOTE 7 OIL AND GAS INFORM (81) NOTE 7 OIL AND GAS INFORM (82) NOTE 7 OIL AND GAS INFORM (83)! 18 PAGE 971 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (17)Beneficial Ownership (17)PARKER PARSLEY 89A LP (1)INDEX TO EXHIBITS (15)SELECTED FINANCIAL DATA (32) SUPPLEMENTAL INFORMATION (29)Balance Sheet (33)Income Statement (34) STATEMENTS OF PARTNERS CA (33)Cash Flows (34) 8 PAGE 991 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (66)! NOTE 5 OIL AND GAS PRODUC (67)! 9 PAGE 992 NOTE 6 RELATED PART! 9 PAGE 992 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (84) NOTE 7 OIL AND GAS INFORM (85) NOTE 7 OIL AND GAS INFORM (86)! 11 PAGE 994 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (33)!31 2000 1 PAGE 1001 PARKER PARSBalance Sheet (34)Income Statement (35) STATEMENTS OF PARTNERS CA (34)Cash Flows (35)!8 PAGE 1010 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (68)! NOTE 5 OIL AND GAS PRODUC (69)! 9 PAGE 1011 NOTE 6 RELATED PAR! 9 PAGE 1011 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (87) NOTE 7 OIL AND GAS INFORM (88) NOTE 7 OIL AND GAS INFORM (89)!11 PAGE 1013 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (34) SUPPLEMENTAL INFORMATION (30)Balance Sheet (35)Income Statement (36) STATEMENTS OF PARTNERS CA (35)Cash Flows (36)!8 PAGE 1029 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (70)! NOTE 5 OIL AND GAS PRODUC (71)! 9 PAGE 1030 NOTE 6 RELATED PAR! 9 PAGE 1030 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (90) NOTE 7 OIL AND GAS INFORM (91) NOTE 7 OIL AND GAS INFORM (92)! 11 PAGE 1032 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (35) SUPPLEMENTAL INFORMATION (31)Balance Sheet (36)Income Statement (37) STATEMENTS OF PARTNERS CA (36)Cash Flows (37)!8 PAGE 1048 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (72)! NOTE 5 OIL AND GAS PRODUC (73)! 9 PAGE 1049 NOTE 6 RELATED PAR! 9 PAGE 1049 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (93) NOTE 7 OIL AND GAS INFORM (94) NOTE 7 OIL AND GAS INFORM (95)! 11 PAGE 1051 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (36)!31 2000 1 PAGE 1058 PARKER PARSPARKER PARSLEY 90A LP ITEM 6 SELECTED FINANCIAL (18)INDEX TO FINANCIAL STATE (15)Balance Sheet (37)Income Statement (38) STATEMENTS OF PARTNERS CA (37)Cash Flows (38)!15 PAGE 1074 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (74)! NOTE 5 OIL AND GAS PRODUC (75)! NOTE 6 RELATED PARTY TRAN (10)! NOTE 6 RELATED PARTY TRAN (11) NOTE 7 OIL AND GAS INFORM (96) NOTE 7 OIL AND GAS INFORM (97)! 18 PAGE 1077 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (18)Beneficial Ownership (18)PARKER PARSLEY 90A LP (1)INDEX TO EXHIBITS (16)SELECTED FINANCIAL DATA (37) SUPPLEMENTAL INFORMATION (32)PARKER PARSLEY 90B CONV LP ITEM 6 SELECTED FINANCIAL (19)INDEX TO FINANCIAL STATE (16)Balance Sheet (38)Income Statement (39) STATEMENTS OF PARTNERS CA (38)Cash Flows (39)!16 PAGE 1105 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (76)! NOTE 5 OIL AND GAS PRODUC (77)! NOTE 6 RELATED PARTY TRAN (12)! NOTE 6 RELATED PARTY TRAN (13) NOTE 7 OIL AND GAS INFORM (98) NOTE 7 OIL AND GAS INFORM (99) NOTE 7 OIL AND GAS INFOR (100)! 19 PAGE 1108 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (19)Beneficial Ownership (19) PARKER PARSLEY 90B CONV LP (1)INDEX TO EXHIBITS (17)SELECTED FINANCIAL DATA (38)!31 2000 1 PAGE 1119 PARKER PARSPARKER PARSLEY 90B LP ITEM 6 SELECTED FINANCIAL (20)INDEX TO FINANCIAL STATE (17)Balance Sheet (39)Income Statement (40) STATEMENTS OF PARTNERS CA (39)Cash Flows (40)!16 PAGE 1136 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (78)! NOTE 5 OIL AND GAS PRODUC (79)! NOTE 6 RELATED PARTY TRAN (14)! NOTE 6 RELATED PARTY TRAN (15) NOTE 7 OIL AND GAS INFOR (101) NOTE 7 OIL AND GAS INFOR (102) NOTE 7 OIL AND GAS INFOR (103)! 19 PAGE 1139 NOTE 8 MAJOR CUS!ITEM 10 DIRECTORS AND EXEC (20)Beneficial Ownership (20)PARKER PARSLEY 90B LP (1)INDEX TO EXHIBITS (18)SELECTED FINANCIAL DATA (39) SUPPLEMENTAL INFORMATION (33)PARKER PARSLEY 90C CONV LP ITEM 6 SELECTED FINANCIAL (21)INDEX TO FINANCIAL STATE (18)Balance Sheet (40)Income Statement (41) STATEMENTS OF PARTNERS CA (40)Cash Flows (41)!15 PAGE 1166 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (80)! NOTE 5 OIL AND GAS PRODUC (81)! NOTE 6 RELATED PARTY TRAN (16)! NOTE 6 RELATED PARTY TRAN (17) NOTE 7 OIL AND GAS INFOR (104) NOTE 7 OIL AND GAS INFOR (105) NOTE 7 OIL AND GAS INFOR (106)! 18 PAGE 1169 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (21)Beneficial Ownership (21) PARKER PARSLEY 90C CONV LP (1)INDEX TO EXHIBITS (19)SELECTED FINANCIAL DATA (40)!31 2000 1 PAGE 1180 PARKER PARSPARKER PARSLEY 90C LP ITEM 6 SELECTED FINANCIAL (22)INDEX TO FINANCIAL STATE (19)Balance Sheet (41)Income Statement (42) STATEMENTS OF PARTNERS CA (41)Cash Flows (42)!15 PAGE 1196 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (82)! NOTE 5 OIL AND GAS PRODUC (83)! NOTE 6 RELATED PARTY TRAN (18)! NOTE 6 RELATED PARTY TRAN (19) NOTE 7 OIL AND GAS INFOR (107) NOTE 7 OIL AND GAS INFOR (108) NOTE 7 OIL AND GAS INFOR (109)! 18 PAGE 1199 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (22)Beneficial Ownership (22)PARKER PARSLEY 90C LP (1)INDEX TO EXHIBITS (20)SELECTED FINANCIAL DATA (41) SUPPLEMENTAL INFORMATION (34)Balance Sheet (42)Income Statement (43) STATEMENTS OF PARTNERS CA (42)Cash Flows (43)!8 PAGE 1219 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (84)! NOTE 5 OIL AND GAS PRODUC (85)! 9 PAGE 1220 NOTE 6 RELATED PAR! 9 PAGE 1220 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (110) NOTE 7 OIL AND GAS INFOR (111) NOTE 7 OIL AND GAS INFOR (112)! 11 PAGE 1222 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (42) SUPPLEMENTAL INFORMATION (35)Balance Sheet (43)Income Statement (44) STATEMENTS OF PARTNERS CA (43)Cash Flows (44)!8 PAGE 1238 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (86)! NOTE 5 OIL AND GAS PRODUC (87)! 9 PAGE 1239 NOTE 6 RELATED PAR! 9 PAGE 1239 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (113) NOTE 7 OIL AND GAS INFOR (114) NOTE 7 OIL AND GAS INFOR (115)! 11 PAGE 1241 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (43)!31 2000 1 PAGE 1248 PARKER PARSPARKER PARSLEY 91A LP ITEM 6 SELECTED FINANCIAL (23)INDEX TO FINANCIAL STATE (20)Balance Sheet (44)Income Statement (45) STATEMENTS OF PARTNERS CA (44)Cash Flows (45)!15 PAGE 1264 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (88)! NOTE 5 OIL AND GAS PRODUC (89)! NOTE 6 RELATED PARTY TRAN (20)! NOTE 6 RELATED PARTY TRAN (21) NOTE 7 OIL AND GAS INFOR (116) NOTE 7 OIL AND GAS INFOR (117) NOTE 7 OIL AND GAS INFOR (118)! 18 PAGE 1267 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (23)Beneficial Ownership (23)PARKER PARSLEY 91A LP (1)INDEX TO EXHIBITS (21)SELECTED FINANCIAL DATA (44)!31 2000 1 PAGE 1278 PARKER PARSPARKER PARSLEY 91B LP ITEM 6 SELECTED FINANCIAL (24)INDEX TO FINANCIAL STATE (21)Balance Sheet (45)Income Statement (46) STATEMENTS OF PARTNERS CA (45)Cash Flows (46)!15 PAGE 1294 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (90)! NOTE 5 OIL AND GAS PRODUC (91)! NOTE 6 RELATED PARTY TRAN (22)! NOTE 6 RELATED PARTY TRAN (23) NOTE 7 OIL AND GAS INFOR (119) NOTE 7 OIL AND GAS INFOR (120) NOTE 7 OIL AND GAS INFOR (121)! 18 PAGE 1297 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (24)Beneficial Ownership (24)PARKER PARSLEY 91B LP (1)INDEX TO EXHIBITS (22)SELECTED FINANCIAL DATA (45)POWER OF ATTORNEYPOWER OF ATTORNEY (1)POWER OF ATTORNEY (2)POWER OF ATTORNEY (3)POWER OF ATTORNEY (4)POWER OF ATTORNEY (5)POWER OF ATTORNEY (6)POWER OF ATTORNEY (7)!2001 THE BOARD OF DIRECTORS REC!2001 THE BOARD OF DIRECTORS (1)!2001 THE BOARD OF DIRECTORS (2)PAGE 2U } :} a     $PIONEER NATURAL RESOURCES CO S-4 04/17/2001THE INCOME PARTNERSHIPS NAME STATE OF FORMATION   80Parker & Parsley Producing Properties 87-A, Ltd.Texas80Parker & Parsley Producing Properties 87-B, Ltd.Texas80Parker & Parsley Producing Properties 88-A, L.P.Delaware$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/.5xl`T&h =PF0*8X> @ l  /e dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/?? SECURITIES AND EXC!CALCULATION OF REGISTRATION FEETO BE HELD ON 2001TABLE OF CONTENTSPAGE 7 LIST OF APPENDICES!LIMITED PARTNER INVESTMENT REPA!LIMITED PARTNER INVESTMENT (1) 5 PAGE 15 NYMEX FUTURES PRICES!EXAMPLE CALCULATION OF MERGER VIncome StatementIncome Statement (1)AT DECEMBER 31 2000!15 PAGE 25 COMPARATIVE PER SHAR!25 PAGE 35 REASONS FOR THE MERGFAIRNESS OPINIONFAIRNESS OPINION (1)!LEGAL OPINION FOR LIMITED PARTN!LEGAL OPINION FOR LIMITED P (1)!NONMANAGING GENERAL PARTNERS OF!49 PAGE 59 PAYMENT OF EXPENSES !58 PAGE 68 COMPARATIVE PER SHAR!60 PAGE 70 OWNERSHIP OF PARTNER PIONEER PIONEER USATHE DRILLING PARTNERSHIPSTHE DRILLING PARTNERSHIPS (1)THE INCOME PARTNERSHIPSINTERESTS (1)INTERESTS (2)INTERESTS (3)INTERESTS (4)INTERESTS (5)!WHERE YOU CAN FIND MORE INFORMAAS OF DECEMBER 31 2000YEAR ENDED DECEMBER 31 2000!QUANTITIES OF OIL AND GAS RESER!STANDARDIZED MEASURE OF DISCOUN CASH FLOWSAS OF MARCH 31 2001AS OF MARCH 31 2001 (1)AS OF MARCH 31 2001 (2)AS OF MARCH 31 2001 (3)AS OF MARCH 31 2001 (4)AS OF MARCH 31 2001 (5)!FROM INCEPTION THROUGH MARCH 31!ANNUAL REPURCHASE PRICES AND AGOF EACH PARTNERSHIP!FOR THE THREE MONTHS ENDED MARCAS OF DECEMBER 31 2000 (1)AS OF MARCH 31 2001 (6)!THE YEARS ENDED DECEMBER 31 200AS OF DECEMBER 31 2000 (2)DECEMBER 31 2000 AND 1999EFFECTIVE DECEMBER 31 2000 EFFECTIVE DECEMBER 31 2000 (1) RECITALS RECITALS (1) SUPPLEMENTAL INFORMATION TABLEBalance SheetIncome Statement (2) STATEMENTS OF PARTNERS CAPITALCash Flows (1)NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCING A! NOTE 5 OIL AND GAS PRODUCI (1)! NOTE 6 RELATED PARTY TRANSACTI! NOTE 6 RELATED PARTY TRANS (1)! NOTE 7 OIL AND GAS INFORMATION! NOTE 7 OIL AND GAS INFORMA (1)! NOTE 7 OIL AND GAS INFORMA (2)!11 PAGE 163 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA SUPPLEMENTAL INFORMATION T (1)Balance Sheet (1)Income Statement (3) STATEMENTS OF PARTNERS CAP (1)Cash Flows (2)NOTE 4 INCOME TAXES (1)! NOTE 5 OIL AND GAS PRODUCI (2)! NOTE 5 OIL AND GAS PRODUCI (3)! 9 PAGE 180 NOTE 6 RELATED PAR! 9 PAGE 180 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORMA (3)! NOTE 7 OIL AND GAS INFORMA (4)! NOTE 7 OIL AND GAS INFORMA (5)!11 PAGE 182 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (1) SUPPLEMENTAL INFORMATION T (2) ITEM 6 SELECTED FINANCIAL DATAINDEX TO FINANCIAL STATEMENTSBalance Sheet (2)Income Statement (4) STATEMENTS OF PARTNERS CAP (2)Cash Flows (3)!15 PAGE 205 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCI (4)! NOTE 5 OIL AND GAS PRODUCI (5)! NOTE 6 RELATED PARTY TRANS (2)! NOTE 6 RELATED PARTY TRANS (3)! NOTE 7 OIL AND GAS INFORMA (6)! NOTE 7 OIL AND GAS INFORMA (7)! NOTE 7 OIL AND GAS INFORMA (8)! NOTE 7 OIL AND GAS INFORMA (9)! NOTE 7 OIL AND GAS INFORM (10)! 18 PAGE 208 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECUTIVEBeneficial OwnershipPARKER PARSLEY 82I LTDINDEX TO EXHIBITSSELECTED FINANCIAL DATA (2) SUPPLEMENTAL INFORMATION T (3) ITEM 6 SELECTED FINANCIAL (1)INDEX TO FINANCIAL STATEM (1)Balance Sheet (3)Income Statement (5) STATEMENTS OF PARTNERS CAP (3)Cash Flows (4)NOTE 4 INCOME TAXES (2)! NOTE 5 OIL AND GAS PRODUCI (6)! NOTE 5 OIL AND GAS PRODUCI (7)! 16 PAGE 236 NOTE 6 RELATED PAR! 16 PAGE 236 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (11)! NOTE 7 OIL AND GAS INFORM (12)! NOTE 7 OIL AND GAS INFORM (13)!18 PAGE 238 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (1)Beneficial Ownership (1)PARKER PARSLEY 82II LTDINDEX TO EXHIBITS (1)SELECTED FINANCIAL DATA (3) SUPPLEMENTAL INFORMATION T (4)Balance Sheet (4)Income Statement (6) STATEMENTS OF PARTNERS CAP (4)Cash Flows (5)NOTE 4 INCOME TAXES (3)! NOTE 5 OIL AND GAS PRODUCI (8)! NOTE 5 OIL AND GAS PRODUCI (9)! 9 PAGE 259 NOTE 6 RELATED PART! 9 PAGE 259 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (14)! NOTE 7 OIL AND GAS INFORM (15)! NOTE 7 OIL AND GAS INFORM (16)!11 PAGE 261 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (4) SUPPLEMENTAL INFORMATION T (5)PARKER PARSLEY 83A LTD ITEM 6 SELECTED FINANCIAL (2)INDEX TO FINANCIAL STATEM (2)Balance Sheet (5)Income Statement (7) STATEMENTS OF PARTNERS CAP (5)Cash Flows (6)NOTE 4 INCOME TAXES (4)! NOTE 5 OIL AND GAS PRODUC (10)! NOTE 5 OIL AND GAS PRODUC (11)! 16 PAGE 285 NOTE 6 RELATED PAR! 16 PAGE 285 NOTE 6 RELATED (1)!NOTE 7 OIL AND GAS INFORMATION  NOTE 7 OIL AND GAS INFORMA (1) NOTE 7 OIL AND GAS INFORMA (2)! 18 PAGE 287 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECU (2)Beneficial Ownership (2)PARKER PARSLEY 83A LTD (1)INDEX TO EXHIBITS (2)SELECTED FINANCIAL DATA (5) SUPPLEMENTAL INFORMATION T (6)PARKER PARSLEY 83B LTD ITEM 6 SELECTED FINANCIAL (3)INDEX TO FINANCIAL STATEM (3)Balance Sheet (6)Income Statement (8) STATEMENTS OF PARTNERS CAP (6)Cash Flows (7)NOTE 4 INCOME TAXES (5)! NOTE 5 OIL AND GAS PRODUC (12)! NOTE 5 OIL AND GAS PRODUC (13)! 16 PAGE 315 NOTE 6 RELATED PAR! 16 PAGE 315 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (3) NOTE 7 OIL AND GAS INFORMA (4) NOTE 7 OIL AND GAS INFORMA (5)!18 PAGE 317 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (3)Beneficial Ownership (3)PARKER PARSLEY 83B LTD (1)INDEX TO EXHIBITS (3)SELECTED FINANCIAL DATA (6) SUPPLEMENTAL INFORMATION T (7)PARKER PARSLEY 84A LTD ITEM 6 SELECTED FINANCIAL (4)INDEX TO FINANCIAL STATEM (4)Balance Sheet (7)Income Statement (9) STATEMENTS OF PARTNERS CAP (7)Cash Flows (8)!15 PAGE 344 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (14)! NOTE 5 OIL AND GAS PRODUC (15)! 16 PAGE 345 NOTE 6 RELATED PAR! 16 PAGE 345 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (6) NOTE 7 OIL AND GAS INFORMA (7) NOTE 7 OIL AND GAS INFORMA (8)!18 PAGE 347 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (4)Beneficial Ownership (4)PARKER PARSLEY 84A LTD (1)INDEX TO EXHIBITS (4)SELECTED FINANCIAL DATA (7) SUPPLEMENTAL INFORMATION T (8)PARKER PARSLEY 85A LTD ITEM 6 SELECTED FINANCIAL (5)INDEX TO FINANCIAL STATEM (5)Balance Sheet (8)Income Statement (10) STATEMENTS OF PARTNERS CAP (8)Cash Flows (9)NOTE 4 INCOME TAXES (6)! NOTE 5 OIL AND GAS PRODUC (16)! NOTE 5 OIL AND GAS PRODUC (17)! 16 PAGE 375 NOTE 6 RELATED PAR! 16 PAGE 375 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (9) NOTE 7 OIL AND GAS INFORM (10) NOTE 7 OIL AND GAS INFORM (11)!18 PAGE 377 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (5)Beneficial Ownership (5)PARKER PARSLEY 85A LTD (1)INDEX TO EXHIBITS (5)SELECTED FINANCIAL DATA (8) SUPPLEMENTAL INFORMATION T (9)PARKER PARSLEY 85B LTD ITEM 6 SELECTED FINANCIAL (6)!7 PAGE 396 ITEM 8 FINANCIAL STABalance Sheet (9) STATEMENTS OF PARTNERS CAP (9)Cash Flows (10)!15 PAGE 404 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (18)! NOTE 5 OIL AND GAS PRODUC (19)! 16 PAGE 405 NOTE 6 RELATED PAR! 16 PAGE 405 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (12) NOTE 7 OIL AND GAS INFORM (13) NOTE 7 OIL AND GAS INFORM (14)!18 PAGE 407 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (6)Beneficial Ownership (6)PARKER PARSLEY 85B LTD (1)INDEX TO EXHIBITS (6)SELECTED FINANCIAL DATA (9) SUPPLEMENTAL INFORMATION (10)Balance Sheet (10)Income Statement (11) STATEMENTS OF PARTNERS CA (10)Cash Flows (11)NOTE 4 INCOME TAXES (7)! NOTE 5 OIL AND GAS PRODUC (20)! NOTE 5 OIL AND GAS PRODUC (21)! 9 PAGE 428 NOTE 6 RELATED PART! 9 PAGE 428 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (15) NOTE 7 OIL AND GAS INFORM (16) NOTE 7 OIL AND GAS INFORM (17)! 11 PAGE 430 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (10) SUPPLEMENTAL INFORMATION (11)Balance Sheet (11)Income Statement (12) STATEMENTS OF PARTNERS CA (11)Cash Flows (12) 8 PAGE 446 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (22)! NOTE 5 OIL AND GAS PRODUC (23)! 9 PAGE 447 NOTE 6 RELATED PART! 9 PAGE 447 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (18) NOTE 7 OIL AND GAS INFORM (19) NOTE 7 OIL AND GAS INFORM (20)! 11 PAGE 449 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (11) SUPPLEMENTAL INFORMATION (12)PARKER PARSLEY 86A LTD ITEM 6 SELECTED FINANCIAL (7)INDEX TO FINANCIAL STATEM (6)Balance Sheet (12)Income Statement (13) STATEMENTS OF PARTNERS CA (12)Cash Flows (13)NOTE 4 INCOME TAXES (8)! NOTE 5 OIL AND GAS PRODUC (24)! NOTE 5 OIL AND GAS PRODUC (25)! 16 PAGE 473 NOTE 6 RELATED PAR! 16 PAGE 473 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (21) NOTE 7 OIL AND GAS INFORM (22) NOTE 7 OIL AND GAS INFORM (23)!18 PAGE 475 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (7)Beneficial Ownership (7)PARKER PARSLEY 86A LTD (1)INDEX TO EXHIBITS (7)SELECTED FINANCIAL DATA (12) SUPPLEMENTAL INFORMATION (13)PARKER PARSLEY 86B LTD ITEM 6 SELECTED FINANCIAL (8)INDEX TO FINANCIAL STATEM (7)Balance Sheet (13)Income Statement (14) STATEMENTS OF PARTNERS CA (13)Cash Flows (14)!16 PAGE 503 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (26)! NOTE 5 OIL AND GAS PRODUC (27)! NOTE 6 RELATED PARTY TRANS (4)! NOTE 6 RELATED PARTY TRANS (5) NOTE 7 OIL AND GAS INFORM (24) NOTE 7 OIL AND GAS INFORM (25) NOTE 7 OIL AND GAS INFORM (26)!19 PAGE 506 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (8)Beneficial Ownership (8)PARKER PARSLEY 86B LTD (1)INDEX TO EXHIBITS (8)SELECTED FINANCIAL DATA (13) SUPPLEMENTAL INFORMATION (14) ITEM 6 SELECTED FINANCIAL (9)!7 PAGE 525 ITEM 8 FINANCIAL STABalance Sheet (14)Income Statement (15) STATEMENTS OF PARTNERS CA (14)Cash Flows (15)NOTE 4 INCOME TAXES (9)! NOTE 5 OIL AND GAS PRODUC (28)! NOTE 5 OIL AND GAS PRODUC (29)! 16 PAGE 534 NOTE 6 RELATED PAR! 16 PAGE 534 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (27) NOTE 7 OIL AND GAS INFORM (28) NOTE 7 OIL AND GAS INFORM (29)!18 PAGE 536 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (9)Beneficial Ownership (9)PARKER PARSLEY 86C LTDSELECTED FINANCIAL DATA (14) SUPPLEMENTAL INFORMATION (15)Balance Sheet (15)Income Statement (16) STATEMENTS OF PARTNERS CA (15)Cash Flows (16) 8 PAGE 556 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (30)! NOTE 5 OIL AND GAS PRODUC (31)! NOTE 6 RELATED PARTY TRANS (6)! NOTE 6 RELATED PARTY TRANS (7) NOTE 7 OIL AND GAS INFORM (30) NOTE 7 OIL AND GAS INFORM (31) NOTE 7 OIL AND GAS INFORM (32)! 11 PAGE 559 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (15) SUPPLEMENTAL INFORMATION (16)Balance Sheet (16)Income Statement (17) STATEMENTS OF PARTNERS CA (16)Cash Flows (17)NOTE 4 INCOME TAXES (10)! NOTE 5 OIL AND GAS PRODUC (32)! NOTE 5 OIL AND GAS PRODUC (33)! 9 PAGE 576 NOTE 6 RELATED PART! 9 PAGE 576 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (33) NOTE 7 OIL AND GAS INFORM (34) NOTE 7 OIL AND GAS INFORM (35)!11 PAGE 578 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (16) SUPPLEMENTAL INFORMATION (17) ITEM 6 SELECTED FINANCIAL (10)!8 PAGE 594 ITEM 8 FINANCIAL STABalance Sheet (17)Income Statement (18) STATEMENTS OF PARTNERS CA (17)Cash Flows (18)NOTE 4 INCOME TAXES (11)! NOTE 5 OIL AND GAS PRODUC (34)! NOTE 5 OIL AND GAS PRODUC (35)! 17 PAGE 603 NOTE 6 RELATED PAR! 17 PAGE 603 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (36) NOTE 7 OIL AND GAS INFORM (37) NOTE 7 OIL AND GAS INFORM (38)! 19 PAGE 605 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (10)Beneficial Ownership (10)PARKER PARSLEY 87A LTDSELECTED FINANCIAL DATA (17) SUPPLEMENTAL INFORMATION (18)Balance Sheet (18)Income Statement (19) STATEMENTS OF PARTNERS CA (18)Cash Flows (19) 8 PAGE 625 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (36)! NOTE 5 OIL AND GAS PRODUC (37)! 9 PAGE 626 NOTE 6 RELATED PART! 9 PAGE 626 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (39) NOTE 7 OIL AND GAS INFORM (40) NOTE 7 OIL AND GAS INFORM (41)! 11 PAGE 628 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (18) SUPPLEMENTAL INFORMATION (19) ITEM 6 SELECTED FINANCIAL (11)INDEX TO FINANCIAL STATEM (8)Balance Sheet (19)Income Statement (20) STATEMENTS OF PARTNERS CA (19)Cash Flows (20)NOTE 4 INCOME TAXES (12)! NOTE 5 OIL AND GAS PRODUC (38)! NOTE 5 OIL AND GAS PRODUC (39)! 17 PAGE 653 NOTE 6 RELATED PAR! 17 PAGE 653 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (42) NOTE 7 OIL AND GAS INFORM (43) NOTE 7 OIL AND GAS INFORM (44)! 19 PAGE 655 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (11)Beneficial Ownership (11)PARKER PARSLEY 87B LTDINDEX TO EXHIBITS (9)SELECTED FINANCIAL DATA (19) SUPPLEMENTAL INFORMATION (20) ITEM 6 SELECTED FINANCIAL (12)INDEX TO FINANCIAL STATEM (9)Balance Sheet (20)Income Statement (21) STATEMENTS OF PARTNERS CA (20)Cash Flows (21)!16 PAGE 683 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (40)! NOTE 5 OIL AND GAS PRODUC (41)! NOTE 6 RELATED PARTY TRANS (8)! NOTE 6 RELATED PARTY TRANS (9) NOTE 7 OIL AND GAS INFORM (45) NOTE 7 OIL AND GAS INFORM (46) NOTE 7 OIL AND GAS INFORM (47)!19 PAGE 686 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (12)Beneficial Ownership (12)PROPERTIES 87A LTDINDEX TO EXHIBITS (10)SELECTED FINANCIAL DATA (20) SUPPLEMENTAL INFORMATION (21) ITEM 6 SELECTED FINANCIAL (13)INDEX TO FINANCIAL STATE (10)Balance Sheet (21)Income Statement (22) STATEMENTS OF PARTNERS CA (21)Cash Flows (22)!16 PAGE 714 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (42)! NOTE 5 OIL AND GAS PRODUC (43)! 17 PAGE 715 NOTE 6 RELATED PAR! 17 PAGE 715 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (48) NOTE 7 OIL AND GAS INFORM (49) NOTE 7 OIL AND GAS INFORM (50)! 19 PAGE 717 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (13)Beneficial Ownership (13)PROPERTIES 87B LTDINDEX TO EXHIBITS (11)SELECTED FINANCIAL DATA (21) SUPPLEMENTAL INFORMATION (22)Balance Sheet (22)Income Statement (23) STATEMENTS OF PARTNERS CA (22)Cash Flows (23) 8 PAGE 737 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (44)! NOTE 5 OIL AND GAS PRODUC (45)! 9 PAGE 738 NOTE 6 RELATED PART! 9 PAGE 738 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (51) NOTE 7 OIL AND GAS INFORM (52) NOTE 7 OIL AND GAS INFORM (53)! 11 PAGE 740 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (22) SUPPLEMENTAL INFORMATION (23)Balance Sheet (23)Income Statement (24) STATEMENTS OF PARTNERS CA (23)Cash Flows (24) 8 PAGE 756 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (46)! NOTE 5 OIL AND GAS PRODUC (47)! 9 PAGE 757 NOTE 6 RELATED PART! 9 PAGE 757 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (54) NOTE 7 OIL AND GAS INFORM (55) NOTE 7 OIL AND GAS INFORM (56)! 11 PAGE 759 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (23)!31 2000 1 PAGE 766 PARKER PARSLPARKER PARSLEY 88A LP ITEM 6 SELECTED FINANCIAL (14)INDEX TO FINANCIAL STATE (11)Balance Sheet (24)Income Statement (25) STATEMENTS OF PARTNERS CA (24)Cash Flows (25)NOTE 4 INCOME TAXES (13)! NOTE 5 OIL AND GAS PRODUC (48)! NOTE 5 OIL AND GAS PRODUC (49)! 16 PAGE 783 NOTE 6 RELATED PAR! 16 PAGE 783 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (57) NOTE 7 OIL AND GAS INFORM (58) NOTE 7 OIL AND GAS INFORM (59)! 18 PAGE 785 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (14)Beneficial Ownership (14)PARKER PARSLEY 88A LP (1)INDEX TO EXHIBITS (12)SELECTED FINANCIAL DATA (24) SUPPLEMENTAL INFORMATION (24)Balance Sheet (25)Income Statement (26) STATEMENTS OF PARTNERS CA (25)Cash Flows (26) 8 PAGE 805 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (50)! NOTE 5 OIL AND GAS PRODUC (51)! 9 PAGE 806 NOTE 6 RELATED PART! 9 PAGE 806 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (60) NOTE 7 OIL AND GAS INFORM (61) NOTE 7 OIL AND GAS INFORM (62)! 11 PAGE 808 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (25)!31 2000 1 PAGE 815 PARKER PARSLPARKER PARSLEY 88B LP ITEM 6 SELECTED FINANCIAL (15)INDEX TO FINANCIAL STATE (12)Balance Sheet (26)Income Statement (27) STATEMENTS OF PARTNERS CA (26)Cash Flows (27)!16 PAGE 832 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (52)! NOTE 5 OIL AND GAS PRODUC (53)! 17 PAGE 833 NOTE 6 RELATED PAR! 17 PAGE 833 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (63) NOTE 7 OIL AND GAS INFORM (64) NOTE 7 OIL AND GAS INFORM (65)! 19 PAGE 835 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (15)Beneficial Ownership (15)PARKER PARSLEY 88B LP (1)INDEX TO EXHIBITS (13)SELECTED FINANCIAL DATA (26) SUPPLEMENTAL INFORMATION (25)Balance Sheet (27)Income Statement (28) STATEMENTS OF PARTNERS CA (27)Cash Flows (28) 8 PAGE 855 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (54)! NOTE 5 OIL AND GAS PRODUC (55)! 9 PAGE 856 NOTE 6 RELATED PART! 9 PAGE 856 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (66) NOTE 7 OIL AND GAS INFORM (67) NOTE 7 OIL AND GAS INFORM (68)! 11 PAGE 858 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (27)!31 2000 1 PAGE 865 PARKER PARSLBalance Sheet (28)Income Statement (29) STATEMENTS OF PARTNERS CA (28)Cash Flows (29) 8 PAGE 874 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (56)! NOTE 5 OIL AND GAS PRODUC (57)! 9 PAGE 875 NOTE 6 RELATED PART! 9 PAGE 875 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (69) NOTE 7 OIL AND GAS INFORM (70) NOTE 7 OIL AND GAS INFORM (71)! 11 PAGE 877 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (28) SUPPLEMENTAL INFORMATION (26)!PARKER PARSLEY PRODUCING PROPER ITEM 6 SELECTED FINANCIAL (16)INDEX TO FINANCIAL STATE (13)Balance Sheet (29)Income Statement (30) STATEMENTS OF PARTNERS CA (29)Cash Flows (30)NOTE 4 INCOME TAXES (14)! NOTE 5 OIL AND GAS PRODUC (58)! NOTE 5 OIL AND GAS PRODUC (59)! 16 PAGE 901 NOTE 6 RELATED PAR! 16 PAGE 901 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (72) NOTE 7 OIL AND GAS INFORM (73)!18 PAGE 903 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXEC (16)Beneficial Ownership (16)PROPERTIES 88A LPINDEX TO EXHIBITS (14)SELECTED FINANCIAL DATA (29) SUPPLEMENTAL INFORMATION (27)Balance Sheet (30)Income Statement (31) STATEMENTS OF PARTNERS CA (30)Cash Flows (31)NOTE 4 INCOME TAXES (15)! NOTE 5 OIL AND GAS PRODUC (60)! NOTE 5 OIL AND GAS PRODUC (61)! 9 PAGE 924 NOTE 6 RELATED PART! 9 PAGE 924 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (74) NOTE 7 OIL AND GAS INFORM (75) NOTE 7 OIL AND GAS INFORM (76)! 11 PAGE 926 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (30) SUPPLEMENTAL INFORMATION (28)Balance Sheet (31)Income Statement (32) STATEMENTS OF PARTNERS CA (31)Cash Flows (32)NOTE 4 INCOME TAXES (16)! NOTE 5 OIL AND GAS PRODUC (62)! NOTE 5 OIL AND GAS PRODUC (63)! 9 PAGE 943 NOTE 6 RELATED PART! 9 PAGE 943 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (77) NOTE 7 OIL AND GAS INFORM (78) NOTE 7 OIL AND GAS INFORM (79)!11 PAGE 945 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (31)!31 2000 1 PAGE 952 PARKER PARSLPARKER PARSLEY 89A LP ITEM 6 SELECTED FINANCIAL (17)INDEX TO FINANCIAL STATE (14)Balance Sheet (32)Income Statement (33) STATEMENTS OF PARTNERS CA (32)Cash Flows (33)NOTE 4 INCOME TAXES (17)! NOTE 5 OIL AND GAS PRODUC (64)! NOTE 5 OIL AND GAS PRODUC (65)! 16 PAGE 969 NOTE 6 RELATED PAR! 16 PAGE 969 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (80) NOTE 7 OIL AND GAS INFORM (81) NOTE 7 OIL AND GAS INFORM (82) NOTE 7 OIL AND GAS INFORM (83)! 18 PAGE 971 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXEC (17)Beneficial Ownership (17)PARKER PARSLEY 89A LP (1)INDEX TO EXHIBITS (15)SELECTED FINANCIAL DATA (32) SUPPLEMENTAL INFORMATION (29)Balance Sheet (33)Income Statement (34) STATEMENTS OF PARTNERS CA (33)Cash Flows (34) 8 PAGE 991 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (66)! NOTE 5 OIL AND GAS PRODUC (67)! 9 PAGE 992 NOTE 6 RELATED PART! 9 PAGE 992 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (84) NOTE 7 OIL AND GAS INFORM (85) NOTE 7 OIL AND GAS INFORM (86)! 11 PAGE 994 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (33)!31 2000 1 PAGE 1001 PARKER PARSBalance Sheet (34)Income Statement (35) STATEMENTS OF PARTNERS CA (34)Cash Flows (35)!8 PAGE 1010 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (68)! NOTE 5 OIL AND GAS PRODUC (69)! 9 PAGE 1011 NOTE 6 RELATED PAR! 9 PAGE 1011 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (87) NOTE 7 OIL AND GAS INFORM (88) NOTE 7 OIL AND GAS INFORM (89)!11 PAGE 1013 NOTE 8 MAJOR CUSTOSELECTED FINANCIAL DATA (34) SUPPLEMENTAL INFORMATION (30)Balance Sheet (35)Income Statement (36) STATEMENTS OF PARTNERS CA (35)Cash Flows (36)!8 PAGE 1029 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (70)! NOTE 5 OIL AND GAS PRODUC (71)! 9 PAGE 1030 NOTE 6 RELATED PAR! 9 PAGE 1030 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (90) NOTE 7 OIL AND GAS INFORM (91) NOTE 7 OIL AND GAS INFORM (92)! 11 PAGE 1032 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (35) SUPPLEMENTAL INFORMATION (31)Balance Sheet (36)Income Statement (37) STATEMENTS OF PARTNERS CA (36)Cash Flows (37)!8 PAGE 1048 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (72)! NOTE 5 OIL AND GAS PRODUC (73)! 9 PAGE 1049 NOTE 6 RELATED PAR! 9 PAGE 1049 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORM (93) NOTE 7 OIL AND GAS INFORM (94) NOTE 7 OIL AND GAS INFORM (95)! 11 PAGE 1051 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (36)!31 2000 1 PAGE 1058 PARKER PARSPARKER PARSLEY 90A LP ITEM 6 SELECTED FINANCIAL (18)INDEX TO FINANCIAL STATE (15)Balance Sheet (37)Income Statement (38) STATEMENTS OF PARTNERS CA (37)Cash Flows (38)!15 PAGE 1074 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (74)! NOTE 5 OIL AND GAS PRODUC (75)! NOTE 6 RELATED PARTY TRAN (10)! NOTE 6 RELATED PARTY TRAN (11) NOTE 7 OIL AND GAS INFORM (96) NOTE 7 OIL AND GAS INFORM (97)! 18 PAGE 1077 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (18)Beneficial Ownership (18)PARKER PARSLEY 90A LP (1)INDEX TO EXHIBITS (16)SELECTED FINANCIAL DATA (37) SUPPLEMENTAL INFORMATION (32)PARKER PARSLEY 90B CONV LP ITEM 6 SELECTED FINANCIAL (19)INDEX TO FINANCIAL STATE (16)Balance Sheet (38)Income Statement (39) STATEMENTS OF PARTNERS CA (38)Cash Flows (39)!16 PAGE 1105 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (76)! NOTE 5 OIL AND GAS PRODUC (77)! NOTE 6 RELATED PARTY TRAN (12)! NOTE 6 RELATED PARTY TRAN (13) NOTE 7 OIL AND GAS INFORM (98) NOTE 7 OIL AND GAS INFORM (99) NOTE 7 OIL AND GAS INFOR (100)! 19 PAGE 1108 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (19)Beneficial Ownership (19) PARKER PARSLEY 90B CONV LP (1)INDEX TO EXHIBITS (17)SELECTED FINANCIAL DATA (38)!31 2000 1 PAGE 1119 PARKER PARSPARKER PARSLEY 90B LP ITEM 6 SELECTED FINANCIAL (20)INDEX TO FINANCIAL STATE (17)Balance Sheet (39)Income Statement (40) STATEMENTS OF PARTNERS CA (39)Cash Flows (40)!16 PAGE 1136 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (78)! NOTE 5 OIL AND GAS PRODUC (79)! NOTE 6 RELATED PARTY TRAN (14)! NOTE 6 RELATED PARTY TRAN (15) NOTE 7 OIL AND GAS INFOR (101) NOTE 7 OIL AND GAS INFOR (102) NOTE 7 OIL AND GAS INFOR (103)! 19 PAGE 1139 NOTE 8 MAJOR CUS!ITEM 10 DIRECTORS AND EXEC (20)Beneficial Ownership (20)PARKER PARSLEY 90B LP (1)INDEX TO EXHIBITS (18)SELECTED FINANCIAL DATA (39) SUPPLEMENTAL INFORMATION (33)PARKER PARSLEY 90C CONV LP ITEM 6 SELECTED FINANCIAL (21)INDEX TO FINANCIAL STATE (18)Balance Sheet (40)Income Statement (41) STATEMENTS OF PARTNERS CA (40)Cash Flows (41)!15 PAGE 1166 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (80)! NOTE 5 OIL AND GAS PRODUC (81)! NOTE 6 RELATED PARTY TRAN (16)! NOTE 6 RELATED PARTY TRAN (17) NOTE 7 OIL AND GAS INFOR (104) NOTE 7 OIL AND GAS INFOR (105) NOTE 7 OIL AND GAS INFOR (106)! 18 PAGE 1169 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (21)Beneficial Ownership (21) PARKER PARSLEY 90C CONV LP (1)INDEX TO EXHIBITS (19)SELECTED FINANCIAL DATA (40)!31 2000 1 PAGE 1180 PARKER PARSPARKER PARSLEY 90C LP ITEM 6 SELECTED FINANCIAL (22)INDEX TO FINANCIAL STATE (19)Balance Sheet (41)Income Statement (42) STATEMENTS OF PARTNERS CA (41)Cash Flows (42)!15 PAGE 1196 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (82)! NOTE 5 OIL AND GAS PRODUC (83)! NOTE 6 RELATED PARTY TRAN (18)! NOTE 6 RELATED PARTY TRAN (19) NOTE 7 OIL AND GAS INFOR (107) NOTE 7 OIL AND GAS INFOR (108) NOTE 7 OIL AND GAS INFOR (109)! 18 PAGE 1199 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (22)Beneficial Ownership (22)PARKER PARSLEY 90C LP (1)INDEX TO EXHIBITS (20)SELECTED FINANCIAL DATA (41) SUPPLEMENTAL INFORMATION (34)Balance Sheet (42)Income Statement (43) STATEMENTS OF PARTNERS CA (42)Cash Flows (43)!8 PAGE 1219 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (84)! NOTE 5 OIL AND GAS PRODUC (85)! 9 PAGE 1220 NOTE 6 RELATED PAR! 9 PAGE 1220 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (110) NOTE 7 OIL AND GAS INFOR (111) NOTE 7 OIL AND GAS INFOR (112)! 11 PAGE 1222 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (42) SUPPLEMENTAL INFORMATION (35)Balance Sheet (43)Income Statement (44) STATEMENTS OF PARTNERS CA (43)Cash Flows (44)!8 PAGE 1238 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (86)! NOTE 5 OIL AND GAS PRODUC (87)! 9 PAGE 1239 NOTE 6 RELATED PAR! 9 PAGE 1239 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFOR (113) NOTE 7 OIL AND GAS INFOR (114) NOTE 7 OIL AND GAS INFOR (115)! 11 PAGE 1241 NOTE 8 MAJOR CUSTSELECTED FINANCIAL DATA (43)!31 2000 1 PAGE 1248 PARKER PARSPARKER PARSLEY 91A LP ITEM 6 SELECTED FINANCIAL (23)INDEX TO FINANCIAL STATE (20)Balance Sheet (44)Income Statement (45) STATEMENTS OF PARTNERS CA (44)Cash Flows (45)!15 PAGE 1264 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (88)! NOTE 5 OIL AND GAS PRODUC (89)! NOTE 6 RELATED PARTY TRAN (20)! NOTE 6 RELATED PARTY TRAN (21) NOTE 7 OIL AND GAS INFOR (116) NOTE 7 OIL AND GAS INFOR (117) NOTE 7 OIL AND GAS INFOR (118)! 18 PAGE 1267 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (23)Beneficial Ownership (23)PARKER PARSLEY 91A LP (1)INDEX TO EXHIBITS (21)SELECTED FINANCIAL DATA (44)!31 2000 1 PAGE 1278 PARKER PARSPARKER PARSLEY 91B LP ITEM 6 SELECTED FINANCIAL (24)INDEX TO FINANCIAL STATE (21)Balance Sheet (45)Income Statement (46) STATEMENTS OF PARTNERS CA (45)Cash Flows (46)!15 PAGE 1294 NOTE 4 INCOME TAXE! NOTE 5 OIL AND GAS PRODUC (90)! NOTE 5 OIL AND GAS PRODUC (91)! NOTE 6 RELATED PARTY TRAN (22)! NOTE 6 RELATED PARTY TRAN (23) NOTE 7 OIL AND GAS INFOR (119) NOTE 7 OIL AND GAS INFOR (120) NOTE 7 OIL AND GAS INFOR (121)! 18 PAGE 1297 NOTE 8 MAJOR CUST!ITEM 10 DIRECTORS AND EXEC (24)Beneficial Ownership (24)PARKER PARSLEY 91B LP (1)INDEX TO EXHIBITS (22)SELECTED FINANCIAL DATA (45)POWER OF ATTORNEYPOWER OF ATTORNEY (1)POWER OF ATTORNEY (2)POWER OF ATTORNEY (3)POWER OF ATTORNEY (4)POWER OF ATTORNEY (5)POWER OF ATTORNEY (6)POWER OF ATTORNEY (7)!2001 THE BOARD OF DIRECTORS REC!2001 THE BOARD OF DIRECTORS (1)!2001 THE BOARD OF DIRECTORS (2)PAGE 2U } F} mB /    $PIONEER NATURAL RESOURCES CO S-4 04/17/2001 INTERESTS SHARES PARTNERSHIP INTERESTS  # LIQUIDITY AND MARKETABILITY;3Shares of Pioneer common stock are generally freely=5The partnership interests of each partnership may nottransferable.;3be transferred if, in the opinion of counsel to the>6currently outstanding are traded on the New York Stock;3partnership, (1) such transfers would result in theB:Exchange and the Toronto Stock Exchange, and the shares of=5termination of the partnership for federal income tax?7Pioneer common stock to be issued in the merger of each:2purposes under Section 708 of the Internal Revenue@8participating partnership have been approved for listing?7Code, or (2) such transfers may not be effected without<4on the New York Stock Exchange and the Toronto Stock>6registration under the Securities Act of 1933 or would2*Exchange upon official notice of issuance.7/result in the violation of any applicable statesecurities laws.;3Parker & Parsley 85-A, Ltd., Parker & Parsley 85-B,=5Ltd., Parker & Parsley Private Investment 85-A, Ltd.,>6Parker & Parsley Selected 85 Private Investment, Ltd.,>6Parker & Parsley Private Investment 86, Ltd., Parker &>6Parsley 87-A Conv., Ltd., Parker & Parsley 87-A, Ltd.,>6Parker & Parsley 87-B Conv., Ltd. and Parker & Parsley>687-B, Ltd. and Parker & Parsley Private Investment 87,D lznb/#Lskb~1G !"#$%&'()*+,-. 8 0Ltd. In addition, no transferee of a partnership!=!5interest has the right to become a substitute limited"="5partner unless, among other things, such substitution#=#5is approved by Pioneer USA, who may grant or withhold$0$(such consent in its absolute discretion.%>%6the foregoing restrictions, it was never intended that&>&6the partnership interests would be actively traded. No'8'0broad-based secondary market for the partnership(,($interests of any partnership exists.))*+$,____________________________1-)Created by Morningstar Document Research.0.(http://documentresearch.morningstar.com/"|kCqYMA=PF0*8X> @..--,, l  MeMv{ dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/?? SECURITIES AND EXC!CALCULATION OF REGISTRATION FEETO BE HELD ON 2001TABLE OF CONTENTSPAGE 7 LIST OF APPENDICES!LIMITED PARTNER INVESTMENT REPA!LIMITED PARTNER INVESTMENT (1) 5 PAGE 15 NYMEX FUTURES PRICES!EXAMPLE CALCULATION OF MERGER VIncome StatementIncome Statement (1)AT DECEMBER 31 2000!15 PAGE 25 COMPARATIVE PER SHAR!25 PAGE 35 REASONS FOR THE MERGFAIRNESS OPINIONFAIRNESS OPINION (1)!LEGAL OPINION FOR LIMITED PARTN!LEGAL OPINION FOR LIMITED P (1)!NONMANAGING GENERAL PARTNERS OF!49 PAGE 59 PAYMENT OF EXPENSES !58 PAGE 68 COMPARATIVE PER SHAR!60 PAGE 70 OWNERSHIP OF PARTNER PIONEER PIONEER USATHE DRILLING PARTNERSHIPSTHE DRILLING PARTNERSHIPS (1)THE INCOME PARTNERSHIPS INTERESTSINTERESTS (2)INTERESTS (3)INTERESTS (4)INTERESTS (5)!WHERE YOU CAN FIND MORE INFORMAAS OF DECEMBER 31 2000YEAR ENDED DECEMBER 31 2000!QUANTITIES OF OIL AND GAS RESER!STANDARDIZED MEASURE OF DISCOUN CASH FLOWSAS OF MARCH 31 2001AS OF MARCH 31 2001 (1)AS OF MARCH 31 2001 (2)AS OF MARCH 31 2001 (3)AS OF MARCH 31 2001 (4)AS OF MARCH 31 2001 (5)!FROM INCEPTION THROUGH MARCH 31!ANNUAL REPURCHASE PRICES AND AGOF EACH PARTNERSHIP!FOR THE THREE MONTHS ENDED MARCAS OF DECEMBER 31 2000 (1)AS OF MARCH 31 2001 (6)!THE YEARS ENDED DECEMBER 31 200AS OF DECEMBER 31 2000 (2)DECEMBER 31 2000 AND 1999EFFECTIVE DECEMBER 31 2000 EFFECTIVE DECEMBER 31 2000 (1) RECITALS RECITALS (1) SUPPLEMENTAL INFORMATION TABLEBalance SheetIncome Statement (2) STATEMENTS OF PARTNERS CAPITALCash Flows (1)NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCING A! NOTE 5 OIL AND GAS PRODUCI (1)! NOTE 6 RELATED PARTY TRANSACTI! NOTE 6 RELATED PARTY TRANS (1)! NOTE 7 OIL AND GAS INFORMATION! NOTE 7 OIL AND GAS INFORMA (1)! NOTE 7 OIL AND GAS INFORMA (2)!11 PAGE 163 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA SUPPLEMENTAL INFORMATION T (1)Balance Sheet (1)Income Statement (3) STATEMENTS OF PARTNERS CAP (1)Cash Flows (2)NOTE 4 INCOME TAXES (1)! NOTE 5 OIL AND GAS PRODUCI (2)! NOTE 5 OIL AND GAS PRODUCI (3)! 9 PAGE 180 NOTE 6 RELATED PAR! 9 PAGE 180 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORMA (3)! NOTE 7 OIL AND GAS INFORMA (4)! NOTE 7 OIL AND GAS INFORMA (5)!11 PAGE 182 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (1) SUPPLEMENTAL INFORMATION T (2) ITEM 6 SELECTED FINANCIAL DATAINDEX TO FINANCIAL STATEMENTSBalance Sheet (2)Income Statement (4) STATEMENTS OF PARTNERS CAP (2)Cash Flows (3)!15 PAGE 205 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUCI (4)! NOTE 5 OIL AND GAS PRODUCI (5)! NOTE 6 RELATED PARTY TRANS (2)! NOTE 6 RELATED PARTY TRANS (3)! NOTE 7 OIL AND GAS INFORMA (6)! NOTE 7 OIL AND GAS INFORMA (7)! NOTE 7 OIL AND GAS INFORMA (8)! NOTE 7 OIL AND GAS INFORMA (9)! NOTE 7 OIL AND GAS INFORM (10)! 18 PAGE 208 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECUTIVEBeneficial OwnershipPARKER PARSLEY 82I LTDINDEX TO EXHIBITSSELECTED FINANCIAL DATA (2) SUPPLEMENTAL INFORMATION T (3) ITEM 6 SELECTED FINANCIAL (1)INDEX TO FINANCIAL STATEM (1)Balance Sheet (3)Income Statement (5) STATEMENTS OF PARTNERS CAP (3)Cash Flows (4)NOTE 4 INCOME TAXES (2)! NOTE 5 OIL AND GAS PRODUCI (6)! NOTE 5 OIL AND GAS PRODUCI (7)! 16 PAGE 236 NOTE 6 RELATED PAR! 16 PAGE 236 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (11)! NOTE 7 OIL AND GAS INFORM (12)! NOTE 7 OIL AND GAS INFORM (13)!18 PAGE 238 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (1)Beneficial Ownership (1)PARKER PARSLEY 82II LTDINDEX TO EXHIBITS (1)SELECTED FINANCIAL DATA (3) SUPPLEMENTAL INFORMATION T (4)Balance Sheet (4)Income Statement (6) STATEMENTS OF PARTNERS CAP (4)Cash Flows (5)NOTE 4 INCOME TAXES (3)! NOTE 5 OIL AND GAS PRODUCI (8)! NOTE 5 OIL AND GAS PRODUCI (9)! 9 PAGE 259 NOTE 6 RELATED PART! 9 PAGE 259 NOTE 6 RELATED (1)! NOTE 7 OIL AND GAS INFORM (14)! NOTE 7 OIL AND GAS INFORM (15)! NOTE 7 OIL AND GAS INFORM (16)!11 PAGE 261 NOTE 8 MAJOR CUSTOMSELECTED FINANCIAL DATA (4) SUPPLEMENTAL INFORMATION T (5)PARKER PARSLEY 83A LTD ITEM 6 SELECTED FINANCIAL (2)INDEX TO FINANCIAL STATEM (2)Balance Sheet (5)Income Statement (7) STATEMENTS OF PARTNERS CAP (5)Cash Flows (6)NOTE 4 INCOME TAXES (4)! NOTE 5 OIL AND GAS PRODUC (10)! NOTE 5 OIL AND GAS PRODUC (11)! 16 PAGE 285 NOTE 6 RELATED PAR! 16 PAGE 285 NOTE 6 RELATED (1)!NOTE 7 OIL AND GAS INFORMATION  NOTE 7 OIL AND GAS INFORMA (1) NOTE 7 OIL AND GAS INFORMA (2)! 18 PAGE 287 NOTE 8 MAJOR CUSTO!ITEM 10 DIRECTORS AND EXECU (2)Beneficial Ownership (2)PARKER PARSLEY 83A LTD (1)INDEX TO EXHIBITS (2)SELECTED FINANCIAL DATA (5) SUPPLEMENTAL INFORMATION T (6)PARKER PARSLEY 83B LTD ITEM 6 SELECTED FINANCIAL (3)INDEX TO FINANCIAL STATEM (3)Balance Sheet (6)Income Statement (8) STATEMENTS OF PARTNERS CAP (6)Cash Flows (7)NOTE 4 INCOME TAXES (5)! NOTE 5 OIL AND GAS PRODUC (12)! NOTE 5 OIL AND GAS PRODUC (13)! 16 PAGE 315 NOTE 6 RELATED PAR! 16 PAGE 315 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (3) NOTE 7 OIL AND GAS INFORMA (4) NOTE 7 OIL AND GAS INFORMA (5)!18 PAGE 317 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (3)Beneficial Ownership (3)PARKER PARSLEY 83B LTD (1)INDEX TO EXHIBITS (3)SELECTED FINANCIAL DATA (6) SUPPLEMENTAL INFORMATION T (7)PARKER PARSLEY 84A LTD ITEM 6 SELECTED FINANCIAL (4)INDEX TO FINANCIAL STATEM (4)Balance Sheet (7)Income Statement (9) STATEMENTS OF PARTNERS CAP (7)Cash Flows (8)!15 PAGE 344 NOTE 4 INCOME TAXES! NOTE 5 OIL AND GAS PRODUC (14)! NOTE 5 OIL AND GAS PRODUC (15)! 16 PAGE 345 NOTE 6 RELATED PAR! 16 PAGE 345 NOTE 6 RELATED (1) NOTE 7 OIL AND GAS INFORMA (6) NOTE 7 OIL AND GAS INFORMA (7) NOTE 7 OIL AND GAS INFORMA (8)!18 PAGE 347 NOTE 8 MAJOR CUSTOM!ITEM 10 DIRECTORS AND EXECU (4)Beneficial Ownership (4)PARKER PARSLEY 84A LTD (1)INDEX TO EXHIBITS (4)SELECTED FINANCIAL DATA (7) SUPPLEMENTAL INFORMATION T (8)PARKER PARSLEY 85A LTD ITEM 6 SEL