Method of coal degasification

Details Method of coal degasification Method of coal degasification

1983-06-23

1984-09-18

Novosad, Stephen J.

Wells

Processes

Specific propping feature

166308, 299 12, 299 16, E21B 43267, E21B 3712

Patent

active

044718403

ABSTRACT:
A method for producing methane gas and other gases present from a subterranean coal-containing formation comprising the creation of a fracture in the subterranean coal-containing formation, introduction of a propping agent into the open fracture after which at least a portion of the proppant is permitted to settle within the fracture, introduction of a substantially propping agent-free fluid into the open fracture to create an open channel over the propping agent and then permitting closure of the fracture upon the propping agent to leave a propped channel.

REFERENCES:
patent: 3349851 (1967-10-01), Huitt et al.
patent: 3384416 (1968-05-01), Ruehl et al.
patent: 3481401 (1969-12-01), Graham
patent: 3709300 (1973-01-01), Pye
patent: 3814480 (1974-06-01), Dahl et al.
patent: 3818990 (1974-06-01), Coulter
patent: 3934649 (1976-01-01), Pasini et al.
patent: 4033415 (1977-07-01), Holtmyer et al.
patent: 4245702 (1981-01-01), Haafkens et al.
patent: 4283089 (1981-08-01), Mazza et al.

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