RESEARCH STATUS OF CO_2-EOR

CO2-EOR can meet the requirements of environ-mental protection and high efficient development of reservoir. Based on literatures published at home and abroad,the research of CO2-EOR technology was discussed systematically,the recovery mecha-nism of CO2-EOR was analyzed and the implementation method of CO2-EOR was summarized. The key technologies including deter-minnation of the minimun miscibility pressure and improving CO2 sweep efficiency and so on were described,and the application situa-tion and prospect of CO2-EOR in China were reviewed.