Method for removing methane from coal

Details Method for removing methane from coal Method for removing methane from coal

1976-06-07

1977-08-23

Bashore, S. Leon

Wells

Processes

Cyclic injection then production of a single well

166268, 299 12, 48DIG6, E21B 4300

Patent

active

040433951

ABSTRACT:
A process for removing methane from a subterranean coal deposit. A carbon dioxide-containing fluid is introduced into the coal deposit through an injection well and held therein for a period sufficient to enable a substantial amount of methane to be desorbed from the surfaces of the coal deposit. Following the hold period, the injected carbon dioxide-containing fluid and desorbed methane are recovered through a recovery well or wells spaced from the injection well. The process is repeated until sufficient methane has been removed to enable safe mining of the coal deposit.

REFERENCES:
patent: 1152392 (1915-09-01), Brietung et al.
patent: 1992323 (1935-02-01), Ranney
patent: 3384416 (1968-05-01), Ruehl
patent: 3493049 (1970-02-01), Matthews et al.
patent: 3506309 (1970-04-01), Hippel
patent: 3915234 (1975-10-01), Pelofsky

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