环保型耐高温黏土稳定剂的合成与性能评价

Synthesis and evaluation of environmentally friendly high temperature resistant clay stabilizer

采用γ-(2,3-环氧丙氧基)丙基三甲氧基硅烷(KH560)与三甲胺盐酸盐反应合成不含有机氯的环保型高温黏土稳定剂ZWS-2,考察其防膨性能与耐水洗性能。结果表明:确定最佳合成条件为KH560与三甲胺盐酸盐的物质的量比1.1∶1、反应温度70℃、反应时间6 h;质量分数为4%的ZWS-2水溶液在150℃下防膨率为96.6%,300℃下防膨率为90.3%;复配试验优选出的最优复配方案为1.5%ZWS-2+4%KCl,与滑溜水压裂液主剂复配后,防膨率达99.6%,一次耐水洗率为99.5%。

An environmentally friendly clay stabilizer ZWS-2 was synthesized by the reaction of γ-(2,3-epoxypropoxy) propyltrimethoxysilane(KH560) with trimethylamine hydrochloride. The anti-swelling performance and washing resistance of clay stabilizer under different conditions were studied. It is found that the optimum synthesis conditions are as follows: the molar ratio of KH560 to trimethylamine hydrochloride is 1.1∶1, the reaction temperature is 70 ℃, and the reaction time is 6 h. The anti-swelling rate of ZWS-2 aqueous solution with mass fraction of 4% is 96.6% at 150 ℃ and 90.3% at 300 ℃. The optimal compounding scheme is 1.5% ZWS-2 + 4% KCl. After compounding with the main agent of slippery hydraulic fracturing fluid, the anti-swelling rate is 99.6% and the 1st washing resistance rate is 99.5%.