Company History

Pioneer Natural Resources Company was formed through the 1997 merger of Parker & Parsley Petroleum Company and MESA Inc. Built on the strategy of acquiring and exploiting proved properties, these companies had established significant operated interests in quality long-lived fields.

In September 2004, Pioneer merged with Evergreen Resources, Inc., creating a new core area in the Rocky Mountains that enhances Pioneer's strong foundation in North America.

Throughout the years Pioneer’s high-quality assets have yielded significant discoveries for the industry. A solid base of operations and continued drive to increase production and cash flow has helped Pioneer become one of the largest operators in the Spraberry/Wolfcamp oil field in West Texas, the gas-rich Raton basin in Southeastern Colorado and the West Panhandle gas field in the Texas Panhandle. It is one of the most active drillers in the South Texas Eagle Ford Shale play.

Key Milestones:

  • August: Pioneer formed through the merger of Parker & Parsley Petroleum Company and MESA Inc.
  • October: Entered South Africa
  • December: Entered Gabon. Acquired Chauvco Resources Ltd.'s assets in Canada and Argentina
  • March: Entered Deepwater Gulf of Mexico with interest in MC 305
  • May: Successfully appraised Sable field, offshore South Africa
  • August: Expanded Deepwater Gulf of Mexico acreage
  • March: First Deepwater Gulf of Mexico discovery in Aconcagua
  • September: Filed to acquire Parker & Parsley Limited Partnerships
  • February: Made Deepwater Gulf of Mexico discovery - Devil's Tower
  • March: Had success on first operated Bossier well in East Texas
  • June: Had success on Devil's Tower appraisal well
  • October: Expanded position in Gulf of Mexico and Canada
  • January: Success in Bajo Barda Gonzalez field in Argentina
  • April: Made Deepwater Gulf of Mexico discovery - Falcon
  • May: Entered Tunisia. Made discovery in Gabon. First gas well discovery in South Africa.
  • June: Sanctioned Sable field and Devil’s Tower development
  • July: Expanded position in Tunisia. Made discoveries in Stirrup and Oneida on Gulf of Mexico shelf.
  • October: Approved Falcon field development
  • December: Acquired 42 Parker & Parsley Limited Partnerships
  • April: Acquired additional West Panhandle interest from CIG
  • June: Acquired interest in BEK block in Tunisia
  • July: Discovered Triton field in the Deepwater Gulf of Mexico
  • September: Discovered Adam field in Tunisia. Made first production from Aconcagua/Canyon Express.
  • October: Entered Alaska and acquired leases on North Slope
  • March: First production from Falcon field. Discovered Harrier field in Deepwater Gulf of Mexico.
  • August: First production from Sable field in South Africa
  • September: Discovered Raptor field in Deepwater Gulf of Mexico
  • January: First production from Harrier field
  • February: Joined Kosmos in West Africa venture
  • June: Expanded into NPR-A in Alaska. Made first production from Tomahawk and Raptor, Falcon satellite fields
  • September: Pioneer merged with Evergreen Resources, Inc.
  • November: Had success in Hawa field in Tunisia
  • May:Divested Gabon assets
  • June: Initiated drilling at Horseshoe Canyon (CBM) in Canada. Made $177 million acquisition in Permian Basin and South Texas
  • August: Acquired interest in Alaska Cosmopolitan - Cook Inlet
  • September: Approved South Coast Gas Development offshore South Africa
  • December: First production from Triton and Goldfinger, Devil's Tower satellite fields. Began South Coast gas development in offshore South Africa.
  • February: Oooguruk field development begins in Alaska
  • March: Divested Deepwater Gulf of Mexico assets
  • April: Divested Argentine assets
  • February: Made Waha and Cherouq discoveries on Jenein Nord, Tunisia
  • April: Made discoveries in El Badr on Jenein Nord, Tunisia, and in Steelhead in Canada. Announced plans to form two MLPs.
  • May: Made Shaheen discovery on Jenein Nord, Tunisia
  • July: Made Farrah discovery on Jenein Nord, Tunisia
  • November: Divested Canada assets
  • February: Successfully expanded Edwards Trend operations
  • June: First Oooguruk production in Alaska
  • June: First horizontal well in Eagle Ford Shale completed. Drilled first injection well in Oooguruk
  • October: Made significant liquids-rich discovery in Eagle Ford Shale
  • February: Expanded integrated services model in the Spraberry field
  • May: Drilled Eagle Ford Shale well with highest condensate IP rate to date in the play
  • June: Entered into joint venture with India-based Reliance Industries and Newpek to develop Eagle Ford Shale oil and gas assets and midstream activities
  • June: Formed EFS Midstream LLC with Reliance as a partner
  • January: Divested Tunisia subsidiaries
  • November: $490 million stock offering
  • March: Acquired Carmeuse Industrial Sands and renamed as Premier Silica LLC
  • August: Closed the sale of South Africa business to The Petroleum Oil and Gas Corporation of South Africa Ltd.
  • January: Signed $1.7 billion agreement with Sinochem Petroleum USA LLC to sell 40 percent of interest in approximately 207,000 net acres leased in horizontal Wolfcamp Shale play
  • January: Drilled first Wolfcamp Shale horizontal well (DL Hutt C #1H) in Midland County and completed it in the Wolfcamp B interval
  • May: Closed joint venture transaction with Sinochem Petroleum USA LLC
  • May: Placed on production first horizontal Wolfcamp Shale well in Martin County (Mabee K #1H) and completed it in the Wolfcamp B interval
  • October: Announced sale of Alaska subsidiary
  • November: Placed on production first horizontal Wolfcamp Shale well in Andrews County (University 7-43 10H) and completed it in the Wolfcamp D interval with an initial 24-hour peak production rate of 3,605 BOEPD, representing the highest horizontal 24-hour initial production rate for any interval in the Midland Basin to date
  • December: Completed merger with Pioneer Southwest Energy Partners L.P.
  • January: Formed Pioneer Water Management LLC
  • April: Closed sale of Alaska subsidiary
  • July: Exported first Eagle Ford Shale condensate cargo
  • July: Announced sale of Hugoton, Kansas assets
  • August: Announced sale of Hugoton and Barnett Shale Assets
  • December: Acquired four Parker & Parsley Limited Partnerships
  • June: Entered into a purchase and sale agreement with Reliance to sell EFS Midstream business
  • January: Began construction of a 20-mile water pipeline system connecting City of Odessa potable water with Pioneer operations in the Permian Basin
  • August: Acquired 28,000 net acres in the Midland Basin from Devon Energy
  • August: Exported first crude oil shipment to Europe
  • December: Signed agreement with the City of Midland to use reclaimed wastewater
  • December: Founding CEO Scott Sheffield retires, continues position as Chairman of the Board
  • January: President Tim Dove becomes CEO and President
  • June: Renamed Premier Silica to Pioneer Sands


Pioneer is committed to preserving our environmental heritage through safe, efficient and environmentally sound business practices and operations.

Sustainability at Pioneer »

Our Operations

Pioneer's exploration and production efforts to find oil and natural gas resources extend throughout the United States.

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Meet Our Leaders

At the helm of Pioneer’s success is a knowledgeable and experienced management team and Board of Directors.

Meet Pioneer's leadership »
Read the Chairman's letter »