Geologic evaluation of critical production parameters for coalbed methane resources. Part 2. Black Warrior Basin. Annual report, August 1987-July 1988
Technical Report
·
OSTI ID:6112126
Coal in the Brookwood and Oak Grove fields in Alabama generally ranges from low- to medium-volatile bituminous rank. Lithologic and stratigraphic evidence indicates that the coal was deposited in structurally influenced alluvial environments. Coal beds are thickest and easily mined on structurally stable, uplifted fault block and the coal beds thin and split in the more heavily faulted downdropped areas, which are amenable to coalbed degasification. In Brookwood field, mine dewatering and deep degasification zones may act in concert, causing upward movement of saline water along faults. In Oak Grove field, mine dewatering evidently creates areas of low fluid pressure and promotes downward movement of fresh water along faults. Production of methane is greatest in wells producing the most water. The method of well stimulation is of minor importance in Brookwood field, however, in Oak Grove field the water-sand-fracture method gives the highest initial-production rate. High-yield wells are located close to faults and lineaments. Lower productivity in Brookwood field may be related to venting of methane in nearby underground mines.
- Research Organization:
- Alabama Geological Survey, University (USA)
- OSTI ID:
- 6112126
- Report Number(s):
- PB-89-142582/XAB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
01 COAL, LIGNITE, AND PEAT
010500 -- Coal
Lignite
& Peat-- Products & By-Products
03 NATURAL GAS
030900* -- Natural Gas-- Artificial Stimulation
Plowshare-- (-1989)
ALKANES
BITUMINOUS COAL
BLACK COAL
CAPACITY
CARBONACEOUS MATERIALS
COAL
COAL DEPOSITS
DOCUMENT TYPES
ENERGY SOURCES
EVALUATION
FOSSIL FUELS
FUELS
GEOLOGIC DEPOSITS
GEOLOGIC STRUCTURES
GEOLOGIC SURVEYS
GROUND WATER
HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROLOGY
MATERIALS
METHANE
MINERAL RESOURCES
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PROGRESS REPORT
RECOVERY
RESOURCES
SURVEYS
WATER
WELLS
010500 -- Coal
Lignite
& Peat-- Products & By-Products
03 NATURAL GAS
030900* -- Natural Gas-- Artificial Stimulation
Plowshare-- (-1989)
ALKANES
BITUMINOUS COAL
BLACK COAL
CAPACITY
CARBONACEOUS MATERIALS
COAL
COAL DEPOSITS
DOCUMENT TYPES
ENERGY SOURCES
EVALUATION
FOSSIL FUELS
FUELS
GEOLOGIC DEPOSITS
GEOLOGIC STRUCTURES
GEOLOGIC SURVEYS
GROUND WATER
HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROLOGY
MATERIALS
METHANE
MINERAL RESOURCES
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PROGRESS REPORT
RECOVERY
RESOURCES
SURVEYS
WATER
WELLS