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Can microbial surveys be used for dry reservoir gas evaluations?

April 26, 2017dry evaluations Gas microbial reservoir surveys Used

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Can microbial surveys be used for dry reservoir gas evaluations?

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Microbial surveyors say yes, we say no! Common microbial methods focus on C2-C5 HC components, the bulk constituents of seep gases besides the universal methane. Thus, there are conceptual constraints on how, e.g., ethane-metabolizers could respond to micro-seepage from a reservoir of 98% methane. The associated seep-ethane is calculated to be extremely low in comparison with common soil in-situ bio-ethane!