CO2 membrane technology matures

EOR production tends to be long lived, partly because of advances in technology. For example, gas processing has changed in the SACROC Unit, Scurry County, Tex. Kinder Morgan CO2 Co. is the current operator of the SACROC, but initial operator Chevron Corp. began water-alternating-CO2 injection to enhance oil production from the unit in the 1970s.Chevron initially installed a Benfield (hot potassium carbonate) process for removing CO2 in the returned gas while a refrigeration plant processed the remaining hydrocarbons into NGL and sales gas.NATCO Group, which now operates the membrane units for SACROC, says that as production grew, the increase in CO2 in the returned gas outpaced the Benfi...

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