水溶性树脂固井工作液体系性能评价*

Performance Evaluation of Water-soluble Resin-based Cementing Fluid System

赫英状 易 浩 李 斐 路飞飞 刘 强 项 楠 严圣东 严思明

HE Yingzhuang YI Hao LI Fei LU Feifei LIU Qiang XIANG Nan YAN Shengdong YAN Siming

针对油气田开发中高压油气、后期压裂、储气库周期性压力变化等带来的层间流体窜流、井口带压问题，以 水溶性树脂（S-HR）与胺类中温固化剂（CA-1）为胶凝材料，制得适用于中低温的树脂固井工作液体系。对该体 系的工程性能、防窜性能、力学性能、耐温性、树脂固化动力学等进行了研究。结果表明，通过调节加重剂重晶石 和悬浮剂微硅的加量，该树脂体系密度在1.20～1.90 g/cm3 可调，流动性能良好；60～90 ℃时，稠化时间在60～ 410 min可调；模拟顶替效率91.5%时，树脂固化体的胶结强度为3.01 MPa，窜流突破压力大于12 MPa，远高于相 近顶替效率下的常规水泥石；树脂固化体在90 ℃下常压养护24 h的抗压强度为53.2 MPa，六次循环交变应力加 载后的弹性恢复率超过85%，优于常规水泥石；固化体的耐温性良好，热分解温度为398 ℃。通过非等温DSC法 确定了S-HR/CA-1和S-HR/胺类高温固化剂（DCY）体系的固化动力学方程。该树脂工作液体系固井界面胶结 强度高，形变恢复能力强，有利于保证固井环空固化体的长期完整性和封隔性，防止窜流的发生；固化动力学方 程的建立为此类树脂工作液体系的研究与应用提供了理论参考。

In view of the problems of gas channeling and wellhead pressure caused by high pressure and fracturing in the development of oil and gas fields and periodicity pressure changing in gas storage，water-soluble resin（S-HR）and amines curing agent for medium temperature（CA-1）were used as the main cementitious materials and a resin-based well cementing fluid system applying to low and medium temperature was prepared. The engineering performance，anti-channeling performance，mechanical property，temperature resistance and curing kinetics of the system were studied. The results showed that the density of the resin system could be adjusted to 1.20—1.90 g/cm3 by changing the dosages of weighting agent barite and suspending agent micro-silica， and it had good flowing ability. The thickening time could be adjusted from 60 to 410 min between 60 ℃ and 90 ℃. When the displacement efficiency was 91.5%，the consolidation strength of cured resin was 3.01 MPa，the interface breakthrough pressure was more than 12 MPa，which was much higher than that of conventional cement stone under similar displacement efficiency. The compressive strength of cured resin was 53.2 MPa after curing at 90 ℃ for 24 h，and the elastic recovery rate was more than 85% after six cycles of alternating stress loading，which was better than that of conventional cement stone. The cured resin body had good temperature resistance and the initial decomposition temperature was 398 ℃. The curing kinetics equations of S-HR/CA-1 and S-HR/amines curing agent for high temperature（DCY）systems were determined by differential scanning calorimetry. The resin cementing fluid had high consolidation strength and strong deformation recovery ability at the cementing interface，which was conducive to ensuring the long-term integrity and sealing performance of cementing material，and preventing fluid channeling of oil and gas wells. The study of curing kinetics provided a theoretical reference for the research and application of this kind of resin working fluid system.

10.19346/j.cnki.1000-4092.2021.04.005