Environments of deposition and petroleum geology of Tuscaloosa group (upper Cretaceous), South Carlton and Pollard fields, southwestern Alabama
Journal Article
·
· AAPG Bull.; (United States)
OSTI ID:7181646
In southwestern Alabama, the lower Tuscaloosa Group (Upper Cretaceous) consists of two informally defined units, the Massive and Pilot sand intervals. The Massive sand interval accumulated principally as sands in a wave-dominated, high-destructive delta system. These sandstones are structureless, well sorted, micaceous, locally fossiliferous, calcareous, glauconitic, fine grained, and quartz rich, containing angular to subangular quartz grains. The Massive sand interval unconformably overlies fluvial-deltaic sediments of Lower Cretaceous strata. Petroleum traps in the Tuscaloosa are structural traps involving salt anticlines (South Carlton field) and extensional fault traps associated with salt movement (Pollard field). Reservoir-grade porosity occurs in the Massive and Pilot sandstone units as primary intergranular porosity. Although Tuscaloosa marine claystones contain significant amounts of organic carbon, these rocks are thermally too immature to be the petroleum source rocks for the Tuscaloosa crude oils in South Carlton and Pollard fields. 17 figures, 2 tables.
- Research Organization:
- Univ. of Alabama, Tuscaloosa
- OSTI ID:
- 7181646
- Journal Information:
- AAPG Bull.; (United States), Journal Name: AAPG Bull.; (United States) Vol. 71:10; ISSN AABUD
- Country of Publication:
- United States
- Language:
- English
Similar Records
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Conference
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Mon Dec 31 23:00:00 EST 1984
· Geol. Soc. Am., Abstr. Programs; (United States)
·
OSTI ID:6454990
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·
OSTI ID:5783510
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Related Subjects
02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
ALABAMA
CRETACEOUS PERIOD
FEDERAL REGION IV
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC FORMATIONS
GEOLOGIC TRAPS
GEOLOGY
MATURATION
MESOZOIC ERA
MINERAL RESOURCES
NORTH AMERICA
OIL FIELDS
PETROLEUM DEPOSITS
PETROLEUM GEOLOGY
POROSITY
RESERVOIR ROCK
RESOURCES
ROCKS
SANDSTONES
SEDIMENTARY ROCKS
USA
020200* -- Petroleum-- Reserves
Geology
& Exploration
ALABAMA
CRETACEOUS PERIOD
FEDERAL REGION IV
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC FORMATIONS
GEOLOGIC TRAPS
GEOLOGY
MATURATION
MESOZOIC ERA
MINERAL RESOURCES
NORTH AMERICA
OIL FIELDS
PETROLEUM DEPOSITS
PETROLEUM GEOLOGY
POROSITY
RESERVOIR ROCK
RESOURCES
ROCKS
SANDSTONES
SEDIMENTARY ROCKS
USA