CO_2混相驱提高原油采收率的研究现状及发展前景  

Research status and development prospects of CO_2 miscible flooding enhanced oil recovery

作　　者：王丽[1] 卜祥福[1] 伍锐东[1,2] 

机构地区：[1]长江大学石油工程学院,湖北荆州434023 [2]中海油上海分公司,上海200030

出　　处：《石油化工应用》2010年第2期4-7,共4页Petrochemical Industry Application

摘　　要：针对我国低渗透油藏自然产能低、地层能量不足、地层压力下降快等引起采收率低的现状,分析了CO_2混相驱的机理,包括CO_2在原油中溶解度对原油粘度、体积、表面张力的影响,比较了几种气体在原油中的溶解度,以及溶解气量对油-水界面张力的影响,总结了CO_2驱的几种作用方式,主要有一次接触混相驱、多次接触混相驱和轻质油加CO_2混相驱,现场应根据实际情况选择合理的CO_2混相驱作用方式。最后给出了CO_2混相驱的应用实例及效果,展望了CO_2混相驱发展前景。Against the status that our natural capacity of low-permeability reservoir is low, lack of formation energy, formation pressure drop caused by rapid recovery issues, we give the analysis of the mechanism of CO2 miscible flooding. Impact of solubility in crude oil of CO2 to viscosity, volume and inteffaeial tension of the crude oil are including. Compare the solubility of a few kinds of gases in crude oil, and the impact of the amount of dissolved gas to the IFT of oil-water. Summarizes the mode of action of several CO2 flooding, they are first contact miscible flooding, multiple contact miscible flooding and light oil plus CO： Miscible flooding. Site selection should be based on the actual situation in a reasonable mode of action of CO2 miscible flooding. Finally, me give the CO2 miscible drive application examples and effect, looked to the development prospects of CO2 miscible flooding.

关 键 词：低渗透 CO2混相驱 界面张力 

分 类 号：TE357.45[石油与天然气工程—油气田开发工程]