不同时机聚驱剩余油分布规律研究

通过物理模拟实验和微观可视化实验,研究了不同时机聚驱时剩余油的分布规律及其成因。实验结果表明,早期注聚能够有效降低注入端附近剩余油饱和度,残余油体积细小,分布分散;后期注聚能够降低远离注入端的中后区域剩余油饱和度,残余油体积较大,分布相对集中,整体驱替效果不如早期注聚。

Study on Remaining Oil Distribution After Injecting Polymer Flooding Agent at Different Moments

The distribution of remaining oil at different moments and the cause for the distribution were studied by means of physical simulation experiment and microscopic visualization experiment. The experiment results have shown that the saturation of remaining oil can be reduced effectively at the injection end with reduced volume and more scattered distribution of remaining oil by injecting the polymer flooding agent in an early stage. The saturation of remaining oil can be reduced in the middle or back zones that are far away from the injection end by injecting the polymer flooding agent in a later stage, however the volume of remaining oil is larger and the distribution of remaining oil is more concentrated in this case with the displacement effect inferior to that when the polymer flooding agent is injected in the early stage.