聚驱后井网加密与二元复合驱结合提高采收率实验研究

Experimental Study on Infilling Well and Combined EOR Methods by S/P Binary Flooding after Polymer Flooding

国内一些油田已陆续进入聚合物驱后续水驱阶段,亟待研发聚驱后进一步提高采收率技术。为此,应用物理模拟方法,研究了聚驱后井网加密和二元复合驱相结合进一步提高采收率方法。实验过程中,利用饱和度监测技术测量物理模型含油饱和度的变化规律。实验结果表明,聚驱后油层仍有大量剩余储量,通过井网加密和二元复合驱结合可进一步提高采收率29.86%。

Some domestic oil fields have entered successively the subsequent water flooding stage after polymer flooding, and it is urgent to develop further EOR methods after polymer flooding. For this purpose, infilling well and combined EOR methods of S/P binary flooding after polymer flooding have been study through physical simulations. In the experiments, oil saturation changes in the physical models were measured by some oil saturation monitoring apparatus. The experiments indicate that there are still a large amount of remained reserves in the layers after polymer flooding and recovery factor can be further increased by 29.86% by infilling well and the combined EOR methods of S/P binary flooding.