Abstract:
Chemical agents have been used in laboratory to generate in-situ carbon dioxide.By using heavy oil samples of some oilfield,an alternate experiment between continuous co2 stimulation + water flooding and co2 stimulation alternate+ water flooding has been carried out,and the comparative analysis of oil displacement efficiency on different crude oil viscosity,physical property and oil saturation of cores has also been carried.The laboratory results indicate the viscosity of crude oil is smaller,physical properties are poor,and the cores with high oil saturation has better flooding effect.