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The AAPG/Datapages Combined Publications Database

Bulletin of South Texas Geological Society

Abstract


South Texas Geological Society Bulletin
Vol. 16 (1975), No. 1. (September), Pages 33-41

Strandlines of the Chamberlain Sands (Lower Frio Formation) of South Texas

Richard H. Sams

Abstract

Two distinctive sands of the lower Frio Formation are encountered in the subsurface along a narrow trend over four South Texas counties (). The updip pinchout of these sands and small up-to-the-basin faulting account for the trapping of several excellent oil fields and many smaller, one- or two-well fields along this trend. Stratigraphic traps along the pinchout are extremely elusive and narrow and have occasioned many a dry hole, nevertheless, the excellent per well primary oil recoveries indicated by the productive history together with present new oil prices would seem to justify continued exploration, and a perservering search can be very rewarding. The narrowness of the trend also offers the advantage of leasing only a small amount of acreage and is therefore of particular attraction to independents.


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