Effect study on surfactant/polymer binary compound displacement system

Based on the new SP binary compound system used in Daqing oilfield, microscopic simulation models flooding experiment and core flooding experiment were carried out. The flooding effects of polymer solution, surfactant solution and SP binary compound system after water flooding were compared, and the influence law of SP binary compound system interfacial tension and emulsion water content on flooding effect. The results show that the flooding effect of SP system is better than that of polymer or surfactant single solution, and the recovery ratio of artificial core by SP system flooding after water flooding was raised about 17.5 percent while the recovery ratio of artificial core flooded by the binary compound system following the water and polymer solution flooding respectively. Further researching on flooding mechanism of surfactant/polymer system and Influencing factors of displacement effect provide great guides to surfactant/polymer system injection project design.