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Southern Oklahoma Folded Belt

I. Curtis HICKS
I. Curtis HICKS
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January 01, 1971


Large reserves of oil and some gas have been discovered and produced in the Southern Oklahoma folded belt and future reserves remain to be found, although they will not approximate those of the past. As of January 1, 1968, approximately 2.25 billion bbl of the known recoverable oil reserves had been produced. Approximately 90 percent (2.05 billion bbl) was produced from Pennsylvanian, Ches- teran, and Simpson sandstone reservoirs, and much (1.18 billion bbl) of this was from Pennsylvanian rocks.

Future significant reserves probably will be found in these same three sandstone reservoirs; the Simpson should be the most important and the Pennsylvanian probably the least important. Production from carbonate rocks in the past has not been great, and it is anticipated that future reserves will be small.

In the Southern Oklahoma folded belt, most of the oil is trapped in anticlines or fault traps, although sandstone pinchout and truncation contribute an important stratigraphic factor. Past exploration has been essentially along the margins of the basins and on the uplifts. These areas have been tested extensively and, though additional reserves will continue to be found, the total probably will be small.

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AAPG Memoir

Future Petroleum Provinces of the United States—Their Geology and Potential, Volumes 1 & 2

Ira H. Cram
Ira H. Cram
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American Association of Petroleum Geologists
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Publication date:
January 01, 1971




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