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

作　　者：孟祥海 王楠 吕鹏 薛宝庆 曹伟佳[2] 夏欢 刘欢 MENG Xianghai;WANG Nan;LYU Peng;XUE Baoqing;CAOWeijia;XIA Huan;LIU Huan(China Oilfield Services Limited of Tianjin branch,Tanggu,Tianjin 300450,P R of China;Laboratory of Enhanced Oil Recovery of Education Ministry,Northeast Petroleum University,Daqing,Heilongjiang 163318,P R of China)

机构地区：[1]中海石油(中国)有限公司天津分公司研究院,天津塘沽300450 [2]东北石油大学提高油气采收率教育部重点实验室,黑龙江大庆163318

出　　处：《油田化学》2021年第4期642-646,共5页Oilfield Chemistry

基　　金：中海石油(中国)有限公司天津分公司重点攻关课题“高效调剖调驱技术区块整体匹配性优化设计研究”(项目编号CCL2019TJT0NST2286)。

摘　　要：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K_(g)=300×10^(-3)~5400×10^(-3)μm^(2)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^(-3)μm^(2)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 K_(g) of homogeneous core was from 300×10^(-3)μm^(2) to 5400×10^(-3)μm^(2),the plugging rate was 99.65%to 96.94%.When the permeability of heterogeneous core was 300×10^(-3)/900×10^(-3)/2000×10^(-3)μm^(2),the oil recovery could be enhanced by 19.10%after the profile measurement.

关 键 词：渤中34-2/4油田 酚醛凝胶 封堵效果 调剖效果 液流转向 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]