梳形聚合物凝胶与普通聚合物凝胶性能对比

Performance Comparison of Comb Polymer Gel and Ordinary Polymer Gel

王凤刚 赵凤兰 侯吉瑞 唐永强 曹淑君 郝宏达

WANG Fenggang ZHAO Fenglan HOU Jirui TANG Yongqiang CAO Shujun HAO Hongda

分别用梳形聚合物(M=2300×104)和普通聚合物(M=2200×104)配制梳形聚合物凝胶和普通聚合物凝胶，对比了两种凝胶的成胶特性、流变参数、微观结构和驱替效果。结果表明，两种凝胶的成胶间均为24 h，30℃下老化30 d后，普通聚合物凝胶和梳形聚合物凝胶的体积缩小率分别为1.2%和0.9%，热稳定性良好。成胶前，梳形聚合物凝胶的假塑性和增稠性高于普通聚合物凝胶；成胶后，梳形聚合物凝胶的弹性高于普通聚合物凝胶，且微观结构密实。岩心经梳形聚合物凝胶和普通聚合物凝胶封堵后，水驱采收率增幅分别为24.61%和21.64%，梳形聚合物凝胶的增油效果较好。图4表4参13

Comb polymer gel with 2300×104 relative molecular mass and ordinary polymer gel with 2200×104 relative molecular mass were prepared. The rheological parameter, gelling properties, microstructure and core displacement effect of two gels were compared. Experiment results showed that the gelling time of two gels was 24 hrs. The volumetric shrinkage rate of ordinary polymer gel and comb polymer gel was 1.2% and 0.9% after aging 30 d at 30℃, indicating good thermal stability. The pseudo plastic and thickening of comb polymer gel was slightly higher than that of ordinary polymer gel before gelling. After gelling, the elasticity of comb polymer gel was higher than that of ordinary polymer gel. And the microstructure of comb polymer gel was dense. Core displacement experiment showed that the enhanced oil recovery rate of water flooding increased 24.61% after comb polymer gel plugging while it only increased 21.64% after ordinary polymer gel plugging. Comb polymer gel had better control effect than ordinary polymer gel.