Jurassic Exploration Trends of East Texas, by Mark W. Presley and Chris H. Reed, Pages 11 - 22
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.
Jurassic Exploration Trends of East Texas
Mark W. Presley
Valero Producing Company
5959 Sherry Lane, Suite 1500
Dallas, Texas 75225
and
Chris H. Reed
Reed and Strawn Exploration Consultants
3800 Paluxy, Phase II-B
Tyler, Texas 75703
ABSTRACT
There is gas and some oil production from both clastic and carbonate
units in the Jurassic of the East Texas Basin. In the Smackover Formation, the reservoir
facies are generally shallow marine carbonates that formed in shoalwater environments in
the western and northern parts of the basin in late Smackover time. Productive intervals
contain interbedded dolomites and oolitic grainstones. Traps are found (1) over low-relief
salt structures, (2) against faults and in fault closures, (3) in relatively shallow updip
areas over basement structures, and (4) in the northeastern part of the basin in Cass and
Marion Counties, where there are deep basement ridges. In Haynesville carbonates,
hydrocarbons are also associated with grainstone facies and occur in two general areas:
(1) in the western part of the basin where there was a narrow marine shelf in Haynesville
time, and (2) on the western side of the Sabine Platform in the eastern part of the East
Texas Basin.
