Part 4 - Berg - Hughes Center
Part 4 - Berg - Hughes Center
Part 4 - Berg - Hughes Center
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Louisiana Salt Basin. Potential underdeveloped reservoirs include Lower Cretaceous<br />
sandstone facies (Hosston, Paluxy) and limestone facies (Sligo, James, Rodessa,<br />
Mooringsport, and Fredericksburg) and Upper Cretaceous sandstone facies of the Austin<br />
(Tokio), Taylor (Ozan), and Navarro (Nacatoch) Groups.<br />
Exploration Strategies<br />
Knowledge of the geohistory of the North Louisiana and Mississippi Interior Salt<br />
Basins and an understanding of the concepts of sequence stratigraphy (transgressive-<br />
regressive sequences) in association with information regarding lithofacies associations,<br />
diagenesis, and petroleum systems facilitates the design of new exploration strategies for<br />
these basins. For example, in the North Louisiana Salt Basin, secondary, non-associated<br />
thermogenic gas is expected to be preserved in Upper Jurassic and Lower Cretaceous<br />
deeply buried transgressive and regressive reservoirs. These potential reservoirs include<br />
Cotton Valley and Hosston sandstone facies, Bossier shale facies, and Smackover and<br />
Sligo carbonate facies at depths greater than 20,000 ft (Mancini et al., 2006, 2008).<br />
Porosity is predicted at this depth and to consist of a combination of depositional and<br />
diagenetic (fracture) types in Cotton Valley and Hosston shallow nearshore and deep<br />
marine sandstone facies. Porosity is predicted to be mainly diagenetic (vuggy and<br />
fracture) in Smackover and Sligo carbonate nearshore, marine shelf, ramp, and reef<br />
facies.<br />
In addition, the knowledge of the geohistory of the North Louisiana Salt Basin and<br />
the use of transgressive-regressive sequences, as recognized in well log signatures and<br />
seismic reflection profiles, is of assistance in targeting combination structural and<br />
stratigraphic traps and specific reservoir facies in a transgressive-regressive sequence.<br />
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