System for displacement of water in coalbed gas reservoirs
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United States of America Patent
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Nov 16, 2004
Grant Date -
Jan 2, 2003
app pub date -
Aug 14, 2002
filing date -
Jun 23, 1998
priority date (Note) -
Expired
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Abstract
A method of stimulating coalbed methane production by injecting gas into a producer and subsequently placing the producer back on production is described. A decrease in water production may also result. The increase in gas production and decrease in water production may result from: (1) the displacement of water from the producer by gas; (2) the establishment of a mobile gas saturation at an extended distance into the coalbed, extending outward from the producer; and (3) the reduction in coalbed methane partial pressure between the coal matrix and the coal's cleat system.
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