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View Diary: Our future is going up in flames (49 comments)

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    Natural gas almost always comes out of the ground sour
    This isn't a correct assessment of this problem.

    Most sour gas is associated with conventional oil and natural gas drilling into hydrocarbon reservoirs.   In order for hydrogen sulfide to accumulate in gas underground, a transport mechanism is necessary with generation of hydrogen sulfide and methyl mercaptan in petroleum liquids which migrate to gas pockets in porous strata in conventional oil and gas production.

    In tight formations, such separation and transfers in nature in the underground don't exist since the coefficient of gaseous diffusivity will be very low in a tight sands or oil shale formation.    I'd expect that shale gas as field gas will generally have significantly less hydrogen sulfide contained in it than would typically occur from most conventional oil and gas produced field gas.

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