复合驱提高采收率实验研究

将聚合物、表面活性剂和凝胶进行复配，制得复合驱体系。进行了复合驱驱油实验，同时还对复合驱提高采收率机理以及复合驱体系注入速度进行了研究。结果表明，聚合物驱后再进行复合驱能进一步提高采收率；高渗复合驱体系具有较高的驱油效率，提高采收率为12．51％-15．66％；低渗复合驱体系也具有较高的驱油效率，提高采收率为7．08％-13．06％，提高采收率值均大于聚合物驱的提高采收率值。确定了复合驱体系最佳注入速度，为0．5mL／min。复合驱体系中凝胶的存在，可提高后续水驱的波及系数，从而提高原油采收率。

Investigation of Combination Flooding Enhancing Oil Recovery

Combination flooding systems were systems to enhance oil recovery was tested in compounded with polymer, surfactant and gel. The lab. The EOR mechanism and the injection speed effectiveness of the of the system were also investigated. The results showed that combination flooding after polymer flooding increased the recovery ratio more .The recovery ratio raised 12.51% - 15.66% by high osmotic combination flooding and 7.08% - 13.06% by low osmotic combination flooding,all which were higher than that by polymer flooding. The optimal injection speed of the combination flooding systems was 0.5 mL/min. The gel in the systems might raise sweep efficiency of the following water flooding and oil recovery ratio.