Sedimentology and Diagenesis of the Cotton Valley Sandstone in the Amoco No. 1 Cullers Well, Rusk County, Texas, by Craig D. Hall, John S. Janks, and Garth H. Ladle, Pages 127 - 140
from:
East Texas Geological Society Publication: The Jurassic of East Texas, Edited by Mark W. Presley
Copyright 1984 by East Texas Geological Society. All rights reserved.

Sedimentology and Diagenesis of the Cotton Valley Sandstone in the Amoco No. 1 Cullers Well, Rusk County, Texas

Craig D. Hall
Robertson Research (U.S.) Inc., Houston, Texas 77060
Present address, Core Laboratories,
1565 W. Mockingbird, Suite 500,
Dallas, Texas 75235

John S. Janks
Robertson Research (U.S.) Inc., Houston, Texas 77060
Present address, Texaco, Inc., Bellaire Research Laboratories,
P.O. Box 425,
Bellaire, Texas 77401

Garth H. Ladle
Robertson Research (U.S.) Inc., Houston, Texas 77060
Present address, Houston Energy Exchange,
1900 W. Loop South, Suite 901,
Houston, Texas 77027

ABSTRACT

Facies and diagenesis of the Cotton Valley Sandstone (Jurassic) were studied in two cores from the producing interval (gas) of the Amoco No. 1 Cullers well taken at depths between 10,025 and 10,372 ft (3056 and 3161 m). These cores contain a lower section of very fine-grained, horizontal- to cross-laminated, locally bioturbated, macerated-shell-rich sandstones and an upper section of interbedded silty mudstones and fine-grained, calcareous sandstones. The lower section is a lower- to middle-shoreface sequence, and the upper section is a regressive-bar complex.