高强度乳液冻胶体系的研究与应用  

Research and Application of High-strength Emulsion Gel System

作　　者：尉振业 杨昌华 成鹏飞 YU Zhenye;YANG Changhua;CHENG Pengfei(Institute of Petroleum Engineering,Xi’an Shiyou University,Xi’an,Shaanxi 710065,P R of China;Western Hypotonic-special hypotonic Reservoir Development and Treatment,Ministry of Education,Xi’an,Shaanxi 710065,P R of China)

机构地区：[1]西安石油大学石油工程学院,陕西西安710065 [2]西部低渗-特低渗油藏开发与治理教育部工程研究中心,陕西西安710065

出　　处：《油田化学》2023年第2期272-276,283,共6页Oilfield Chemistry

基　　金：局级重点攻关项目“浅层、中深层高含水油藏气驱主导技术攻关与应用研究”(项目编号JDYT-2019-JS-262);西安石油大学研究生创新与实践能力培养计划资助(项目编号YCS21213172)。

摘　　要：为解决传统冻胶体系现场溶解困难和针对大孔喉的封堵效果差的问题,研究了一种可快速溶解的水溶性乳液聚合物为主剂的高强度冻胶堵剂体系,并评价了该体系的稳定性和封堵性能。实验结果表明,配方为5000 mg/L HPAM类聚合物乳液主剂+500 mg/L交联剂+1500 mg/L pH调节剂乙酸的体系,在60℃下可形成黏度为130 Pa·s以上的高强度冻胶,该冻胶体系具有良好热稳定性和针对大孔道的封堵能力,对大孔隙和裂缝的封堵率高达89.36%。此外,通过玻尔兹曼拟合建立了交联剂浓度与交联反应进程间的显函数关系,首次从理论上提出了一种通过调整交联剂浓度来控制冻胶体系黏度变化的方法。In order to solve the problems of difficult on-site dissolution of traditional gel systems and poor plugging effect for large pore throats,a high-strength gel plugging system with a fast-dissolving water-soluble emulsion polymer as the main agent was studied and the thermal stability and sealing performance of system was evaluated.The experimental results showed that the system,composed of 5000 mg/L HPAM polymer emulsion+500 mg/L crosslinker+1500 mg/L acid,could develop a high-strength gel with viscosity above 130 Pa·s at the temperature of 60℃.the gel system has good thermal stability and sealing ability,the sealing rate of the system for large pores and cracks was up to 89.36%.In addition,a significant function between the cross-linking agent concentration and the cross-linking reaction process was established by Boltzmann fitting,and a theoretical method to control the viscosity of the gel system by adjusting the cross-linking agent concentration was put forward.

关 键 词：冻胶体系 玻尔兹曼拟合 稳定性 调剖堵水 

分 类 号：TE358.3[石油与天然气工程—油气田开发工程]