酚醛凝胶调剖剂封堵及调剖效果研究*

Plugging and Profile Control Effect of Phenolic Gel Profile Control Agent

孟祥海 王 楠 吕 鹏 薛宝庆 曹伟佳 夏 欢 刘 欢

MENG Xianghai WANG Nan LYU Peng XUE Baoqing CAO Weijia XIA Huan LIU Huan

针对渤中34-2/4油田长期注水开发后存在的非均质性加剧和注入水低效循环问题，须采取调剖措施来改 善水驱开发效果。以渤中34-2/4储层特征为模拟对象，测试了酚醛凝胶调剖剂的成胶时间和成胶黏度，采用环 氧树脂浇筑岩心和层内非均质岩心实验开展了酚醛凝胶调剖剂封堵及液流转向效果研究。研究结果表明，固化 剂间苯二酚和助剂碳酸氢铵可增加酚醛凝胶调剖剂的反应速率和凝胶强度，可通过向聚合物SD-201酚醛凝胶 调剖剂中添加固化剂，向乳液聚合物DW-R酚醛凝胶调剖剂中添加固化剂和助剂来提高凝胶强度。与聚合物 DW-R酚醛凝胶相比，聚合物SD-201酚醛凝胶在多孔介质内封堵效果和液流转向效果较好，当均质岩心渗透率 Kg=300×10-3 ～5400×10-3 μm2时，封堵率为 99.65%～96.94%，当非均质岩心渗透率为 300×10-3/900×10-3/2000× 10-3μm2时，调剖后采收率增幅达到19.10%。

In BZ 34-2/4 Oilfield，the heterogeneity has been aggravated and the injection water circulation is inefficient after long-term water flooding. Therefore，profile control measures should be taken to improve the water flooding development effect. Based on the characteristics of BZ 34-2/4 reservoir，the gelation time and gelation viscosity of the phenolic gel were tested，the experiments of plugging and liquid flow diversion of the phenolic gel were carried out by using epoxy resin casting core and heterogeneous core experiment. The results showed that the curing agent（resorcine）and auxiliary（ammonium bicarbonate）could increase the reaction rate and gel strength of phenolic gel profile control agents. The gel strength could be improved by adding curing agents to polymer SD-201 phenolic gel profile control agent and adding curing agents and auxiliaries to emulsion polymer DW-R phenolic gel profile control agent. Compared with the polymer DW-R phenolic gel，the polymer SD-201 phenolic gel had better plugging effect and liquid flow diversion effect in porous media. When the permeability Kg of homogeneous core was from 300×10-3 μm2 to 5400×10-3 μm2，the plugging rate was 99.65% to 96.94%. When the permeability of heterogeneous core was 300× 10-3/900×10-3/2000 ×10-3μm2，the oil recovery could be enhanced by 19.10% after the profile measurement.

10.19346/j.cnki.1000-4092.2021.04.012