聚合物与弹性微球二元复合段塞调剖效果研究

采用填砂管岩心流动实验,通过在模拟油层渗透率情况下测定一定浓度聚合物溶液、微球悬浮溶液、聚合物与弹性微球复合体系在岩心中调剖时的阻力系数变化过程,探究聚合物与弹性微球二元复合段塞的调剖效果。结果表明,弹性微球在注入过程中阻力系数呈波动式上升,具有很高的残余阻力系数,其调剖效果好于聚合物。聚合物/弹性微球二元复合段塞中,聚合物主要起到增加黏度的作用,携带微球溶液进入地层。微球溶液起到深部调剖的主导作用。实验得出聚合物(浓度500 mg/L)/弹性微球(浓度1 000～2 000 mg/L)的复合段塞调剖能够发挥较好的封堵效果。

Study on Profile Control Effects of Polymer and Elastic Microspheres Binary Complex Slug

In order to know the water profile control effects of polymer and elastic microsphere binary complex slug, core flow test was used to study the variation characteristic of resistance factor with polymer, microspheres, and polymer/microsphere system in cores after water flooding. The results show that in the process of elastic microspheres injection, the resistance coefficient presents characteristic of wave-type variation and has the high residual resistance factor after the water flooding, which is better than that of polymer. In the polymer/microsphere system, polymer mainly plays the role of increasing viscosity, carrying microspheres solution into the ground. and the microspheres solution makes leading role in the deep profile control. The results also shows that under the slug of polymer(500mg/L) and elastic microspheres (1000~2000mg/L), the water profile control effect is better.