Diagenesis of a Tight Gas Formation: The Jurassic Cotton Valley Sandstone, East Texas Basin, by William A. Wescott, Pages 118 - 126
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.

Diagenesis of a Tight Gas Formation: The Jurassic Cotton Valley Sandstone, East Texas Basin

William A. Wescott
Amoco Production Company,
P.O. Box 3092,
Houston, Texas 77253

ABSTRACT

The Upper Jurassic Cotton Valley Sandstone is a thick siliciclastic unit in the East Texas Basin. Sandstones and shales of this unit were deposited in shallow marine and fluvial-deltaic environments and exhibit progradational successions of facies. Along the eastern flank of the basin, natural gas is produced from Cotton Valley reservoirs characterized by low porosity and permeability, which have been stimulated by massive hydraulic fracturing.