Methane production from carbonaceous subterranean formations
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United States of America Patent
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May 14, 1991
Issued Date -
N/A
app pub date -
Aug 8, 1989
filing date -
Sep 27, 1988
priority date (Note) -
Expired
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Abstract
A method of producing methane by injecting inert gas, such as nitrogen, through an injection well into a solid carbonaceous subterranean formation (e.g., coal) and recovering methane from a production well(s). Methane desorption is achieved by reduction in methane partial pressure rather than by reduction in total pressure alone.
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