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South Texas

Edwards Trend mapPioneer continues to expand its gas resource play along the Edwards Reef Trend in South Texas with outstanding success. Since discovery of the Pawnee field in 1961, the Company has been the most active driller along the trend and has established a large and growing acreage position to support its expansion efforts.

Increased drilling activity beginning in 2006 resulted in production growth approaching 40% for 2007 versus 2006. Further growth of more than 40% was achieved during 2008 versus 2007. In 2009, Pioneer suspended drilling activities, as gas prices were drastically dropping. The Company has identified more than 200 development locations, and – with the stabilization of gas prices – will evaluate returning to drilling.

South Texas operationsPioneer continues to add new treating capacity to handle the increasing gas production and has completed an extension of its existing gathering pipeline. The Company also completed a multi-year seismic shoot covering more than 900 square miles.

New well stimulation techniques have also shown promise in enhancing production from new and existing wells. This asset has delivered significant production and reserves growth historically and promises to do the same in the future.

Another potential resource play in the same area is the Eagle Ford Shale. For more information about Pioneer's activities in the emerging Eagle Ford play in South Texas, go to the Eagle Ford Shale page.