The Study On Residual Oil And Effective Character Of Surfactant/Polymer Combined Flooding In Sazhong Oilfield Of Daqing

The test of Crude rock indicated that the advanced number of polymer bigger than wateris ten-twelve, the advanced number of Surfactant/Polymer bigger than polymer is eleven-twelve, the result proved that Surfactant/Polymer combined flooding could advance the effectof flooding. The test of Surfactant/Polymer combined flooding in Daqing West oil filed hasbeen developed for three years, although the test has had a certain extent effect, the extent issmall and different greatly, for that, it was necessary to analyze residual oil and effectivecharacter of the area.This item farther compartmentalized sediment posture and anew protracted sedimentposture, and original reservoir description results comparison, more detailed, and reallyreflect the underground situation. The result establish important foundation for confirming theconnectedness and effect. Through numerical value simulator, understood the different circsof oil saturation, the result established important foundation for choosing well and floor. Andthe numerical value simulator finished the forecast of the developer effect.This project summed up the characteristics of residual oil distribution in best oilreservoir after polymer flooding, considering with the analytical result of residual oildistribution, the project carried out targeted measures，better searched residual oil, verifiedthe correctness of the study of residual oil. Considering the engineering field dynamicmovement, this project summed up the effective character of the area.