摘要
为了提高聚合物驱用于非均质性较强油藏开发的采收率,对一种可溶性改性淀粉MS在岩心表面的吸附滞留能力及其对提高采收率的影响进行了实验研究。研究结果表明:MS在Berea岩心上有较强的吸附滞留能力,具有较高的残余阻力系数;MS能较多地进入并吸附在高渗透层,可有效改善注入流体的波及面积,增大流体在低渗透层的流动性;MS能够较大幅度地提高后续水驱采收率。
In order to increase recovery of more heterogeneous reservoirs developed by polymer flooding, the adsorption of a modified starch MS on core surfaces and its effects on EOR were studied by experiments. The experimental results showed that MS had higher adsorption capability on Berea cores, with higher residual resistance coefficient. Meanwhile, more MS can enter into and be adsorbed on high permeable zones, which may effectively improve sweep area of injected fluids and increase their flow in low permeable zones. Therefore, MS can greatly increase recovery of reservoirs during succeeding development of water flooding.
出处
《中国海上油气》
CAS
2008年第5期312-315,共4页
China Offshore Oil and Gas
