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West Texas Geological Society
Abstract
Abstract: Genetic Appraisal of Petroleum of the Permian Basin
Abstract
A literature search has shown that the many source rocks involved in the genesis of the oils of the Permian Basin can be subdivided into four main groups. These are:
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Ordovician Ellenburger Group.
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Late Devonian-Early Mississippian Woodford Shale Group.
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Pennsylvanian Group.
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Permian Group, particularly Wolfcampian and Leonardian Series.
Reservoirs range throughout the Paleozoic strata. Numerous oil types are represented, ranging from high sulfur crudes showing thermocatalytic sulfate reduction, to very low sulfur crudes of probable lagoonal origin.
A map of the Permian basin’s principal oil accumulations has been prepared on a custom-built GIS information system using the Department of Energy data base of the oils of the USA. This map classifies the oils according to their genetic composition using the ratio of sulfur to nitrogen pioneered by Thompson (1991). The age of the reservoir age is also shown. Certain trends are revealed for the first time.
References
Thompson, K.F.M., 1994, A classification of petroleum on the basis of the ratio of sulfur to nitrogen: Organic Geochemistry, v. 21 no 8-8, p 877–890.
Acknowledgments and Associated Footnotes
1 Paul Comet: Geochemical and Environmental Research Group, Texas A & M University, College Station, TX
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