利用CO_2提高石油采收率技术研究现状

RESEARCH STATUS OF CO_2-EOR

利用CO2提高石油采收率(CO2—EOR)可满足环保和油藏高效开发的双重要求。在对国内外相关文献调研的基础上,对CO2—EOR技术研究进行了系统阐述。分析了CO2—EOR的采油机理,总结了CO2—EOR的实施方法,评述了CO2—EOR研究中的最小混相压力的确定、改善CO2波及效率等关键技术的研究进展,以及我国CO2—EOR应用的现状及前景。

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.