Method for reducing the inert gas fraction in methane-containing gaseous mixtures obtained from underground formations
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United States of America Patent
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Feb 14, 1995
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app pub date -
Nov 3, 1993
filing date -
Nov 3, 1993
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Abstract
A method for reducing the inert gas fraction volume percent present in a methane-containing mixture produced by injecting an inert gas into a solid carbonaceous subterranean formation is disclosed. The method reduces the inert gas fraction by suspending the injection of the inert gas or by reducing a rate of injection of the inert gas. Additional methods are disclosed in which the inert gas volume percent of a gaseous mixture produced from more than one well can be maintained below the inert gas volume percent present in a gas obtained from at least one of the wells.
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