基于45°倾角油砂储层三元复合驱实验研究

Experimental Research of ASP Flooding Based on the 45° Angle Oil Sands Reservoir

以甘肃某地具有典型性的45°倾角油砂储层为研究对象,使用当地油砂为样本构建三维实验模型,采用氢氧化钠、十二烷基苯磺酸钠及阴离子型聚丙烯酰胺制备三元复合驱替剂,考察了热水驱后三元复合驱应用于45°倾角油砂储层的二次开发效果,分析了驱替剂的波及范围、储层内含油饱和度及异向水平井产量的变化规律。结果表明,三元复合驱替剂的流动范围产生横向扩展,波及区域显著增加,使得油砂油采收率提高了18.91%,异向水平井中平行于储层倾角方向的水平井产油率更高。

Based on the typical oil sands of the 45° angle reservoir somewhere in Gansu province as the research object, an experimental model with the application of sodium hydroxide, sodium dodecyl benzene sulfonic acid and anionic polyacrylamide as the triple component ASP displacement agent was investigated using local oil sands as samples. The asp flooding on the secondary development of 45° angle oil sands reservoir effect after hot-water flooding was tested, and the changing laws of sweep area for displacement agent, flooding effect and production of different direction horizontal well were also studied. The results showed that, displacement agent flowed to transverse area and affected area increased significantly, making the oil sands recovery improved for 18.91%, and production of the horizontal well which parallel to inclination of the reservoir is higher.