三元复合驱油机理实验研究

Experimental Study on the Mechanism of ASP Flooding

三元复合驱提高采收率技术于上世纪80年代开始广泛应用,指碱剂、表面活性剂、聚合物按一定比例混合作为注入液注入地层。相对于热水驱及一、二元三元复合驱,三元复合驱能更好的降低油水间的界面张力,扩大波及体积,因此具有更好的开采效果。通过三维井网模型实验,与热水驱实验结果进行对比,分析了宏观和微观角度下的三元复合驱提高采收率机理。

ASP flooding enhanced oil recovery technique is to inject the mixture of alkali, surfactant and polymer into the formation; it has been widely used since 1980s. Among all kinds of flooding techniques, ASP flooding can best reduce the interfacial tension between oil and water, and expand swept volume, so it has the best exploitation effect. In this paper, based on three-dimensional network model experiments, compared with hot water flooding experimental results, EOR mechanism of ASP flooding technique was analyzed from the macro and micro perspectives.