聚合物调剖堵水室内研究

Laboratory Study on Profile Control and Water Shutoff Performance of Polymers

随着我国大多数油田进入高含水期,开发过程中的层间矛盾、平面矛盾问题日益突出。注水锥进现象导致油区见水过早,产量递减,驱油效率降低。为解决这一问题,国内外通过调剖堵水技术来提高采收率[1]。本文对目前最常用的聚合物调剖堵水技术进行研究,以W储层为支撑对三种不同类型的聚合物调剖堵剂进行评价。结果显示,弱凝胶堵剂、凝胶颗粒堵剂、水玻璃凝胶堵剂对研究储层堵水均是有效的;弱凝胶堵剂对研究区储层堵水效果是最好的,凝胶颗粒堵剂效果次之,水玻璃凝胶堵剂效果相对较差。

Now most of oilfields in China have entrenched into the high water cut stage, the problem of plane contradiction and interlayer contradiction in the development process becomes more and more prominent. The water coning phenomena causes the oil region see the water prematurely, the production decline, and oil displacement efficiency reduce. To solve this problem, the profile control and water shutoff technology has been widely used to improve oil recovery at home and abroad. In this paper, common polymer profile control and water shutoff technologies were researched. Taking W reservoir as research objective, three different types of polymer profile control and water shutoff agents were evaluated. The results show that, weak gel blocking agent, gel particles blocking agent, sodium silicate gel plugging agent all have plugging effect for the reservoir; plugging effect of the weak gel plugging agent for the reservoir is the best, plugging effect of the sodium silicate gel plugging agent is the poorest.