Method of coalbed methane production

Details Method of coalbed methane production Method of coalbed methane production

1988-09-27

1989-11-28

Suchfield, George A.

Wells

Processes

Cyclic injection then production of a single well

166245, 166266, 166268, 166272, E21B 4324, E21B 4330, E21B 4340

Patent

active

048831220

ABSTRACT:
A method of producing coalbed methane by injecting inert gas, such as nitrogen, through an injection well into the coal seam and recovering coalbed methane from a production well(s). Methane desorption from coal is achieved by reduction in methane partial pressure rather than by reduction in total pressure alone.

REFERENCES:
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patent: 4043395 (1977-08-01), Every et al.
patent: 4130164 (1978-12-01), Datta
patent: 4391327 (1983-07-01), De Carlo
patent: 4446921 (1984-05-01), Coenen et al.
patent: 4448252 (1984-05-01), Stoddard et al.
patent: 4544037 (1985-10-01), Terry
patent: 4662439 (1987-05-01), Puri
patent: 4756367 (1978-07-01), Puri et al.
A. A. Reznik et al., "An Analysis of the Effect of CO.sub.2 Injection on the Recovery of In-Situ Methane from Bituminous Coal: An Experimental Simulation", Society of Petroleum Engineers Journal, Oct., 1984.

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