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The AAPG/Datapages Combined Publications Database
West Texas Geological Society
Abstract
Porosity Occurrence and Reservoir Characteristics of the Grayburg Formation, Central Basin Platform
Abstract
The Grayburg Formation is a complex sequence of interbedded carbonates, siliciclastics, and evaporites that were deposited across the back-reef shelves of the Permian Basin during Permian (Guadalupian) time. Its reservoirs are among the most prolific in the Permian Basin, but recovery efficiencies are low, and significant quantities of mobile oil remain after primary, secondary, and tertiary recovery efforts.
Means field, located on the eastern margin of the Central Basin Platform in Andrews County, Texas, produces mainly from open shelf, shallow shelf, and shoal dolostones and dolomitic sandstones in combined stratigraphic and structural traps. The formation of porosity in these reservoirs can be attributed to depositional processes that created primary porosity and to diagenetic processes that subsequently modified these pores as well as any secondary pores.
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