As oil resources become increasingly scarce,improving oilfield extraction efficiency has become a major challenge facing the oil industry.In this article,three different chemical agents(PAM,SDBS,PAA)were used to conduct oil displacement efficiency experiments by measuring core permeability and oil-water interfacial tension.Experimental results showed that PAA performed best in increasing rock permeability,increasing from 130.14 mD to 212.43 mD,an increase of 63.2%,while SDBS performed best in reducing oil-water interfacial tension,decreasing from 38.92 mN·m-121.00 mN·m-1,reduced by 46.2%.In addition,the oil displacement efficiency reached its optimum under medium temperature(40℃)and medium pressure(20 MPa)conditions,as well as moderate injection flow rate(100 L·min-1).The role of chemical agents in changing the rock pore structure and reducing the oil-water interfacial tension jointly promoted the improvement of oil-water fluidity,thereby significantly enhancing the overall oil displacement effect.The findings of this study have important reference value in guiding the selection and application of chemical agents in actual oilfield operations,and provide new perspectives and methods for oilfield development.
关键词
化学剂/深度调剖/渗透率/油水界面张力/驱油效率
Key words
Chemical agents/Depth profile control/Permeability/Oil-water interfacial tension/Oil displacement efficiency
维普
万方数据