Wells – Processes – Separating material entering well
Patent
1993-11-03
1995-02-14
Suchfield, George A.
Wells
Processes
Separating material entering well
166268, 166271, E21B 4318, E21B 4326, E21B 4340
Patent
active
053886429
ABSTRACT:
A method of recovering methane from a solid carbonaceous subterranean formation having a production well in fluid communication with the formation and an injection well in fluid communication with the formation, comprising the steps of passing a gaseous fluid containing at least 60 volume percent nitrogen and at least 15 volume percent oxygen through a membrane separator to produce an oxygen-depleted effluent, pressurizing the oxygen-depleted effluent to a pressure above a reservoir pressure of the solid carbonaceous subterranean formation, injecting the oxygen-depleted effluent into the formation through the injection well, and recovering a fluid comprising methane through the production well.
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Puri Rajen
Yee Dan
Amoco Corporation
Kretchmer Richard A.
McDonald Scott P.
Suchfield George A.
Wakefield Charles P.
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