Degasification study from an air shaft in the Beckley coalbed

Journal Article · Fri Jan 01 04:00:00 EST 1982 · Bur. Mines Open File Rep. (U.S.); (United States)

OSTI ID:6875117

Goodman, T W; Cervik, J; Aul, G N

During 514 days of degasification, the Beckley coalbed produced 18.7 million CF (0.5 million m/sup 3/) of gas, which reduced methane mine-face emissions by about 77%. The gas flowed through eight horizontal boreholes drilled at depths of 418-910 ft (127-277 m) in a radial pattern from the bottom of a ventilation air shaft. An in situ pressure hole was also drilled at 205 ft (65 m). Because the shaft was in a water-saturated basin, gas flows were low, an average of 94,100 CF/day for all eight holes, along with 13 gal (49.3 liters)/min of water. At 200 ft (61 m), the in situ pressure into the coalbed was 79 psig (545 kN/m/sup 2/).

• OSTI ID: 6875117
• Journal Information: Bur. Mines Open File Rep. (U.S.); (United States), Journal Name: Bur. Mines Open File Rep. (U.S.); (United States) Vol. 8675; ISSN XMOFA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
012000* -- Coal
Lignite
& Peat-- Mining
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
ALKANES
BOREHOLES
CAVITIES
COAL DEPOSITS
COAL MINING
COAL SEAMS
DEGASSING
GEOLOGIC DEPOSITS
HYDROCARBONS
METHANE
MINE SHAFTS
MINERAL RESOURCES
MINING
ORGANIC COMPOUNDS
RECOVERY
RESERVOIR PRESSURE
RESOURCES
SHAFT EXCAVATIONS
UNDERGROUND MINING
WATER INFLUX