Research on Efficiency and Mechanism of Oil Recovery Using Chemical Agents for Deep Profile Control in Oil Fields
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.
Chemical agentsDepth profile controlPermeabilityOil-water interfacial tensionOil displacement efficiency
万方数据
维普
