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The AAPG/Datapages Combined Publications Database
GCAGS Transactions
Abstract
Formation Evaluation with Logs in the Ark-La-Tex Cotton Valley
R. W. Frank (1)
ABSTRACT
This paper discusses how logs can he used to evaluate the low-porosity, low-permeability, Cotton Valley sandstones and limestones of the South Arkansas, North Louisiana, and East Texas areas.
Revisions and improvements to the SARABAND (FOOTNOTE *) technique have significantly enhanced reservoir analysis
from computer-processed interpretations in these tight, gas-bearing formations. The Dual Induction/Sonic
log
combination and the Density Compensated
log
/Compensated Neutron
log
combination provide the
log
data needed, while the Rwa and Ro overlay quick-looks are both available from the Dual Induction/Sonic combination.
Most Cotton Valley sandstones fall into the two general classifications of channel-like or bar-like deposits. Examples are given of how the High Resolution Dipmeter can help define these stratigraphic features.
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