Recovery of methane from solid carbonaceous subterranean formati

Details Recovery of methane from solid carbonaceous subterranean formati Recovery of methane from solid carbonaceous subterranean formati

1991-02-11

1992-03-31

Novosad, Stephen J.

Wells

Processes

Separating material entering well

166271, 166272, 166274, 299 10, E21B 4316, E21B 4324, E21B 4340

Patent

active

050999214

ABSTRACT:
A method of recovering methane from a solid carbonaceous subterranean formation by injecting a fluid that desorbs methane through at least one injection well into a subterranean formation and recovering desorbed methane through at least one production well. The initial rate of injection of the desorbing fluid can be increased without exceeding formation pressure limitations by injecting a preflush fluid having a desorbing efficiency less than a desorbing efficiency of the first fluid. This increase in injection of the desorbing fluid results in an increase in the recovery rate of methane.

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