不同驱油剂应用于聚合物驱油后油层的适应性分析

国内一些油田已陆续进入聚合物驱后续水驱阶段,亟待研发聚合物驱油后进一步提高采收率技术。为此,运用物理模拟方法,研究了不同驱油剂的渗流能力及聚合物驱油后驱油效果。实验结果表明,泡沫复合体系阻力系数及残余阻力系数最高,流度控制作用最强,扩大了波及体积,同时由于表面活性剂的加入,进一步提高了驱油效率,驱油效果较好,聚合物驱油后采收率提高10.6个百分点。

Reservoir adaptability analysis of different oil displacement agents in polymer flooding

s:Some oilfields in China have entered the stage of subsequent water flooding after polymer flooding,and it is in urgent need to develop EOR technology after polymer flooding. Therefore physical simulation has been performed to study the percolation capacity of different oil displacement agents and the oil displacement efficiency of polymer flooding. The experiment results show that foam complex system has the highest resistance coefficient and residual resistance factor,the strongest control on fluid mobility,expands swept volume,and further improves oil displacement efficiency by adding surfactant. The recovery factor is improved by 10.6% after polymer flooding.