A method of producing methane is described. The method includes providing formation fluid from a subsurface in situ conversion process. The formation fluid is separated to produce a liquid stream and a first gas stream. The first gas stream includes olefins. At least the olefins in the first gas stream...http://www.google.com/patents/US8070840?utm_source=gb-gplus-sharePatent US8070840 - Treatment of gas from an in situ conversion process
