Research on the development of petroleum sulfonate composite flooding for enhanced oil recovery
A composite oil displacement agent YCQY-103 was obtained by using self-made petroleum sul-fonate as the main agent and optimizing additives to improve its solubilization and interface performance.Compared with the sulfonate type oil displacement agent CDMP-2 and the on-site oil displacement agent CQH-1 in a certain oilfield,YCQY-103 has significantly improved interfacial tension,wetting perform-ance,capillary lift height,and permeability.Under the conditions of injection volume of 0.8 PV,concen-tration of 0.3％,and permeability of 10 mD,YCQY-103 achieved an enhanced recovery rate of 12.18％.
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