环氧树脂液体胶塞封窜堵剂体系性能评价*

Performance Evaluation of Epoxy Resin Plugging Agent System

杨 彪 黄雪莉 何 龙 巫光胜 董瑞强

YANG Biao HUANG Xueli HE Long WU Guangsheng DONG Ruiqiang

在油田开发过程中，由于修井、采油及地层结构的影响，油水井经常出现管外窜通和钻井液漏失等问题，严 重影响采油速率和油水井的使用寿命。本文以环氧树脂作为封窜剂主剂，考察活性稀释剂缩水甘油丁醚加量、 固化剂TEA加量、硅烷偶联剂KH-560加量对环氧树脂胶塞堵剂固化时间、固化强度、封窜等性能的影响，并根据 简化的环氧树脂固化动力学模型，模拟得到树脂胶塞封窜剂凝胶时间和温度的关系曲线。研究结果表明，环氧 树脂胶塞封窜剂中稀释剂缩水甘油丁醚的最佳加量为15%（占环氧树脂用量），固化剂TEA加量为10%~20% 时，在130℃下环氧树脂胶塞封窜剂的固化时间可控制在2~5 h，固化后抗压强度可达到20 MPa以上，封窜强度 5.57 MPa，当KH-560加量为3%~4%时，树脂胶塞的封窜性能提升2倍左右，具有很好的封窜性能，完全能够满 足套管封窜要求。通过模型模拟得到稀释剂加量15%、固化剂TEA加量15%的环氧树脂胶塞浆液的凝胶时间tgel 与温度T关系为： ，对现场施工具有指导意义。图9表3参18

In the process of oilfield development，due to the influence of routine well workover，oil recovery and stratum structure，outputting oil and injecting water well tubers often have problems such as water channeling of outside tubes or drilling fluid loss，which seriously affects the oil production rate and the service life of oil or water wells. Therefore，in this paper，the epoxy resin was selected as the main agent for sealing channeling，and the effects of active diluent（glycidyl butyl ether）dosage， curing agent TEA dosage and silane coupling agent KH-560 dosage on curing time，curing strength and sealing channeling of epoxy resin adhesive plugging agent were studied. The research results showed that the optimal dilution ratio of epoxy resin plugging agent was 15%，accounting for epoxy resin dosage，and by adjusting the dosage of curing agent in range of 10%—20%，the curing time of epoxy resin plug sealing agent could be controlled within 2—5 h，and the compressive strength of colloid plug could reach above 20 MPa，and the sealing strength was 5.57 MPa. By adding 3%—4% silane coupling agent，the sealing strength could be increased two times. The plugging agent had good sealing and channeling performance，and could completely meet the requirements of casing sealing and channeling. According to the simplified chemical reaction kinetic model of epoxy resin curing，the relationship between gel time and temperature of the resin rubber plugging agent was simulated，which had guiding significance for field construction.

10.19346/j.cnki.1000-4092.2020.02.010