METHOD OF REDUCING QYANTITY OF INERT GAS FRACTION IN METHANE CONTAINING GASEOUS MIXTURES OBTAINED FROM UNDERGROUND FORMATIONS

摘要

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.