Refrigeration provides economic process for recovering NGL from CO2-EOR recycle gas

01/18/2010
Removing and selling NGL from the produced gas stream is one on the ways CO2 enhanced oil recovery projects can improve their economics.These projects involve gas recycling into the reservoir for maintaining pressure and improving oil mobility. The recycled gas absorbs NGL in the reservoir that can be recovered with a refrigeration process.The process involves refrigerating the gas and then separating, stabilizing, and recovering the NGL. A company then can market the recovered NGL as C3, C3+, C4, and C5+ or use it to spike the crude.This article describes the following aspects of NGL recovery:• Process plant required for each alternative (C3+, fractionated liquids, or crude spiking)...
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