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The AAPG/Datapages Combined Publications Database
GCAGS Transactions
Abstract
Depositional Setting and Petroleum Production, Gray Sandstone (Upper Jurassic), Cotton Valley Field, Northern Louisiana
Brian W. Atwell1,2, Bo Henk3,4, Fred C. Meendsen2, and John A. Breyer1,4
1Department of Geology, Texas Christian University, TCU Box 298960, Fort Worth, Texas 76129
2XTO Energy, 810 Houston St., Fort Worth, Texas 76102
3Matador Resources, 5400 LBJ Fwy., Ste. 1500, Dallas, Texas 75240
4Energy Institute, Texas Christian University, TCU Box 298960, Fort Worth, Texas 76129
ABSTRACT
The Gray Sandstone (Upper Jurassic) in the Cotton Valley Field, northern Louisiana, consists of six sandstone lobes of limited lateral extent. The continuity of the sandstone across the field is due to the overlapping of the lobes, which are clustered at the mouth of a feeder channel that bifurcates downdip. Individual lobes may be isolated from or amalgamated with overlying and/or underlying lobes. The sandstones contain sedimentary features and ichnological fabrics most commonly associated with storm deposits. The sandstones were deposited below fair-weather wave base and above storm wave base on a submarine fan complex supplied by episodic storms. The fan complex formed on the Late Jurassic ramp margin of the northern Gulf of Mexico, basinward of oolitic shoals at the ramp crest. Production from the Gray Sandstone in the Cotton Valley Field comes from a large, doubly plunging anticline draped over a salt structure formed after the deposition of the Gray Sandstone. Production occurs both over the crest and on the flanks of the anticline.
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