Geology of Chatom Field, Washington County, Alabama
Journal Article
·
· Trans., Gulf Coast Assoc. Geol. Soc.; (United States)
Chatom field, located in Washington County, Alabama, produces sour gas condensate in the Jurassic Smackover Formation. The 1971 discovery currently has 4 producing wells. The 4 wells supply a 25 million cu ft sour gas cleaning plant. Structurally, Chatom field is an isolated Jurassic closure located along a N. to S. trending Louann salt ridge. Isopachs indicate both Jurassic and Cretaceous structural growths. The reservoir rock, the Upper Smackover Formation, consists of a finely crystalline dolomite with intercrystalline porosity and a pelmoldic dolomite with both intercrystalline and moldic porosities. Both types exist together in a single porosity zone. Porosities and permeabilities are generally higher in the pelmoldic dolomites. Petrographic analysis indicated the Upper Smackover reservoirs were deposited as low energy, pellatal muds and moderate energy oolitic shoals. Dolomitization occurred early in both the grainstone facies and the nonporous lime-mud facies. The original and dolomitic porosities have been enhanced by selective grain leaching.
- Research Organization:
- Inexco Oil Co
- OSTI ID:
- 6556738
- Journal Information:
- Trans., Gulf Coast Assoc. Geol. Soc.; (United States), Journal Name: Trans., Gulf Coast Assoc. Geol. Soc.; (United States) Vol. 25; ISSN TGCGA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
03 NATURAL GAS
030200* -- Natural Gas-- Reserves
Geology
& Exploration
ALABAMA
ALKALINE EARTH METAL COMPOUNDS
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBONATE MINERALS
CARBONATES
CRETACEOUS PERIOD
CRYSTAL STRUCTURE
DOLOMITE
ENHANCED RECOVERY
FEDERAL REGION IV
GAS CONDENSATE FIELDS
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC STRUCTURES
GEOLOGICAL SURVEYS
JURASSIC PERIOD
MAGNESIUM CARBONATES
MAGNESIUM COMPOUNDS
MESOZOIC ERA
MINERAL RESOURCES
MINERALS
NATURAL GAS DEPOSITS
NORTH AMERICA
OXYGEN COMPOUNDS
PERMEABILITY
PETROLEUM DEPOSITS
POROSITY
RECOVERY
RESERVOIR ROCK
RESOURCES
SURVEYS
USA
030200* -- Natural Gas-- Reserves
Geology
& Exploration
ALABAMA
ALKALINE EARTH METAL COMPOUNDS
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBONATE MINERALS
CARBONATES
CRETACEOUS PERIOD
CRYSTAL STRUCTURE
DOLOMITE
ENHANCED RECOVERY
FEDERAL REGION IV
GAS CONDENSATE FIELDS
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC STRUCTURES
GEOLOGICAL SURVEYS
JURASSIC PERIOD
MAGNESIUM CARBONATES
MAGNESIUM COMPOUNDS
MESOZOIC ERA
MINERAL RESOURCES
MINERALS
NATURAL GAS DEPOSITS
NORTH AMERICA
OXYGEN COMPOUNDS
PERMEABILITY
PETROLEUM DEPOSITS
POROSITY
RECOVERY
RESERVOIR ROCK
RESOURCES
SURVEYS
USA