非均质油藏三次采油方法研究

Tertiary recovery method for heterogeneous oil reservoirs

应用平面非均质和层间非均质两种模型 ,分别对水驱、聚合物驱、三元复合驱、凝胶驱调剖、凝胶驱加三元复合驱等不同的驱油方式进行了数值模拟研究。结果表明 ,凝胶驱加三元复合驱可使油藏低渗透区的原油饱和度大幅度降低 ,整个油藏得到均匀开采 ,采收率最高 ,是开采非均质油藏最理想的方法。

Based on the areal and interlayer heterogeneous models, different oil displacement modes of waterflooding, polymer flooding, ASP flooding, gel flooding as well as gel plus ASP flooding are studied using numerical simulation. The results indicate that the profile control by gel flooding is the key to exploit the potential in the heterogeneous reservoirs. Gel flooding plus ASP flooding can decrease the oil saturation considerably in the low permeable zones of the reservoir, develop the whole reservoir evenly, and then improve the oil recovery obviously. So it is the most ideal recovery method for heterogeneous oil reservoirs.