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| Synthesis and evaluation of environmentally friendly high temperature resistant clay stabilizer |
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YANG Fan1,2, YANG Xiaohua1,2, LIN Yongxue1,2, LI Zhoujun1,2, SHEN Huibing3, WU Pingping3, XUE Meiyu3, LI Peng3, ZHANG Hongyu3
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(1.State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 102206, China;2.SINOPEC Research Institute of Petroleum Engineering Company Limited, Beijing 1022016, China;3.College of Chemistry and Chemical Engineering in China University of Petroleum (East China), Qingdao 266580, China)
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| Abstract: |
| 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%. |
| Key words: thermostability clay stabilizer environmentally friendly chemical organosilane |
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