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The AAPG/Datapages Combined Publications Database

Oklahoma City Geological Society

Abstract


The Shale Shaker Digest IV, Volumes XII-XIV (1961-1964)
Pages 88-98

Petroleum Geology of East Pauls Valley Area, Garvin County, Oklahoma

Robert Thomas Young

ABSTRACT

The East Pauls Valley area includes Tps. 3 and 4 N., Rs. 1 and 2 E., Garvin County, Oklahoma. Geologically the area is high on the Pauls Valley uplift, a broad subsurface nose probably formed in late Morrowan time which plunges northwestward into the Anadarko basin.

The Pure Oil Company conducted seismic work on the arch early in the 1940's and in 1942 opened the Pauls Valley oil field when the No. 1 M. A. Teter, SW SW NW, sec. 31, T. 4 N., R. 1 E., flowed at the rate of 100 barrels of oil per hour from the Bromide sand at a depth of 3,906 feet. This was the first oil discovery on the Pauls Valley arch and subsequently four other commercial oil fields were found and developed within the four-township area included by this report.

Some of the most significant oil production has been from Desmoinesian sands deposited by the earliest advancing Pennsylvanian seas. Stratigraphic traps were formed where these onlapping sandstones pinchout updip on pre-Pennsylvanian anticlines at Pauls Valley and East Pauls Valley field, the two largest oil fields in the area.

A long period of erosion intervened after Mississippian time so that secondary porosity developed in Ordovician carbonates on topographically high areas where the Mississippian and Devonian sediments were eroded off. Where such porosity zones were structurally high, and where onlapping Pennsylvanian beds could provide a seal, hydrocarbons were entrapped. Such traps are important at the two largest fields within the East Pauls Valley area. Smaller fields in the area have been developed from fault closures, small anticlines and updip sandstone pinchouts.

Evidence indicates that the types of traps most worthy of future investigation are the onlapping wedges of Desmoinesian and Missourian sandstones. Traps of the unconformity and fault types are next importance.


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