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The AAPG/Datapages Combined Publications Database

GCAGS Transactions

Abstract


Gulf Coast Association of Geological Societies Transactions
Vol. 45 (1995), Pages 229-235

Deposition and Remaining Productive Capabilities of the Upper Cretaceous Eutaw Sands of East-Central Mississippi

Bobby R. Greer

ABSTRACT

The study area includes Jasper, Jones, Clarke and Wayne Counties where near the close of the Cretaceous period there were several transgressions and regressions of the epicontinental seas. These rapid changes in sea level played a major role in the depositing and reworking of the Eutaw sands of East-Central Mississippi. The Eutaw sands of this area are described as fine to very fine grained, glauconitic, micaceous, and sometimes fossiliferous indicating the environment of deposition was in the neritic zone of the continental shelf. High porosites, and permeabilities, and the prolific nature as an oil reservoir sand makes this formation one of the most sought after reservoirs in the state of Mississippi. All of the 18 Eutaw fields in this study area have, or are reaching, their economic limits for primary production. Four of these fields have undergone successful waterfloods which have greatly enhanced their ultimate recoveries. The remaining fields in the study area have the potential of yielding millions of barrels of oil from secondary and tertiary recovery methods.


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