驱油体系乳化综合指数对提高采收率的影响

Effect of Emulsification Comprehensive Index of Flooding System on Enhanced Oil Recovery

栾和鑫 陈权生 陈 静 向湘兴 程志强 张国山

LUAN Huoxin，CHEN Quansheng，CHEN Jing，XIANG Xiangxing， CHENG Zhiqiang， ZHANG Guoshan

为了明确化学驱驱油体系乳化性能对提高原油采收率的作用， 揭示驱油体系乳化综合指数与提高采收率的关系， 研究了乳化强度不同的聚合物/表面活性剂/碱三元复合驱油体系的驱油效果。结果表明， 乳化综合指数＞70%的强乳化体系对提高采收率是不利的； 通过降低驱油体系碱加量及降低表面活性剂乳化作用的方法将驱油体系的乳化综合指数降至约60%， 可使采收率增幅由9.92%增至21%～ 30%， 三元复合驱油体系适宜的乳化综合指数应控制在60%左右。降低表面活性剂的乳化作用对提高采收率的影响大于降低碱加量的影响。图4表2参13

In order to research the effect of emulsifying property of chemical flooding system on enhanced oil recovery（EOR），and reveal the relationship between emulsification comprehensive index and EOR，the oil displacement effect of polymer/surfactant/alkali（ASP）complex flooding system with different emulsion strength was studied. The results showed that it had poor effect on EOR when the emulsification comprehensive index was bigger than 70%. While the emulsification comprehensive index of flooding system was decreased to about 60% by decreasing alkali concentration and emulsification of surfactant，the enhanced oil recovery rate increased from 9.92% to 21%—30%. The best emulsification comprehensive index was about 60% for ASP flooding. The effect of decreasing surfactant’ s emulsification on EOR was bigger than that of decreasing the concentration of alkali.

10.19346./j.cnki.1000-4092.2017.03.028