Decade of exploration in deep lower Tuscaloosa gas trend in southern Louisiana
The deep lower Tuscaloosa gas trend, now in a mature stage of exploration, was discovered in 1975. Production is from lower Tuscaloosa sandstones of Late Cretaceous age. During the past decade, the petroleum industry has drilled approximately 217 new-field wildcats and 232 development wells in the trend. This exploration effort has discovered 24 fields. Most of these fields produce from depths between 15,000 and 20,000 ft. In February 1984, the average daily production was 426.6 mmcf of gas and 18,350 bbl of liquid hydrocarbons from approximately 115 wells. Five fields, False River, Irene, Judge Digby, Moore-Sams, and Port Hudson, all discovered prior to 1980 and concentrated northwest of Baton Rouge, Louisiana, have produced about 72% of the cumulative gas and 80% of the cumulative liquids. Reservoirs in deep lower Tuscaloosa occur in a terrigenous clastic sequence, which thickens rapidly downdip from a carbonate shelf of Early Cretaceous age. Occurrences of commercial hydrocarbons in the trend are primarily dependent on depositional environment, syndepositional tectonics, source rock, original sand mineralogy, and burial diagenesis. Salt diapirism is locally important.
- Research Organization:
- Chevron Inc., New Orleans, LA
- OSTI ID:
- 5909348
- Report Number(s):
- CONF-850322-
- Journal Information:
- Am. Assoc. Pet. Geol., Bull.; (United States), Journal Name: Am. Assoc. Pet. Geol., Bull.; (United States) Vol. 69:2; ISSN AAPGB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
030200* -- Natural Gas-- Reserves
Geology
& Exploration
DIAGENESIS
ENERGY SOURCES
EXPLORATION
FEDERAL REGION VI
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
GEOLOGIC DEPOSITS
LOUISIANA
MINERAL RESOURCES
NATURAL GAS
NATURAL GAS DEPOSITS
NORTH AMERICA
PRODUCTION
RESERVOIR ROCK
RESOURCES
ROCKS
SANDSTONES
SEDIMENTARY ROCKS
USA