Synthesis of shale inhibitor of alkyl glycoside quaternary ammonium salt and its action mechanism

被引：0
|
作者：
Huang Y. [1 ]
Li Z. [1 ]
Yan B. [1 ]
Li H. [2 ]
Lü K. [2 ]
Sun J. [2 ]
Dai C. [2 ]
Jiang G. [3 ]
机构：
[1] Zhanjiang Branch of CNOOC (China) Company Limited, Zhanjiang
[2] School of Petroleum Engineering in China University of Petroleum(East China), Qingdao
[3] College of Petroleum Engineering in China University of Petroleum(Beijing), Beijing
来源：
Zhongguo Shiyou Daxue Xuebao (Ziran Kexue Ban)/Journal of China University of Petroleum (Edition of Natural Science) | 2020年 / 44卷 / 04期
关键词：
Alkyl glycoside; Inhibition mechanism; Quaternary ammonium salt; Shale inhibitor; Wellbore stability;
D O I：
10.3969/j.issn.1673-5005.2020.04.015
中图分类号：
学科分类号：
摘要：
Aiming at the problems of large dosage and high cost of non-ionic surfactant alkyl glycoside (APG) used as water-based drilling fluid inhibitors, shale inhibitor of alkyl glycoside quaternary ammonium salt (APGS) was synthesized by introducing quaternary ammonium cations into APG molecules through etherification reaction. The inhibition performance was evaluated by immersion experiment, linear expansion experiment and shale rolling recovery experiment. The toxicity and biodegradability of APGS were evaluated by luminescent bacteria method and biological oxygen demand method, respectively. The inhibition mechanism was investigated by surface tension test, particle size analysis, adsorption test and infrared spectrum analysis. The results show that APGS effectively inhibits the hydration and dispersion of clay, and its performance is better than that of polyamine and potassium chloride. For easily dispersing drill cuttings, the rolling recovery rate of 2% APGS is 73.8%, which is higher than that of polyamine and APG. APGS has a good compatibility with drilling fluid, which has little effect on the rheological properties of the drilling fluid and can reduce fluid loss to a certain degree. Besides, APGS is nontoxic and easily biodegradable. It is found that APGS can neutralize the negative charges of clay and compress the spacing of the crystal layer, inhibiting the hydration and dispersion of clay. APGS could adsorb on the surface of clay to form a dense adsorption layerby the electrostatic attraction and hydrogen bonding, preventing water interaction with clay. The surface tension can be greatly reduced.And the surface tension of 1% APGS aqueous solution is 29 mN/m, preventing water invasion into the formation by reducing the capillary force. © 2020, Editorial Office of Journal of China University of Petroleum(Edition of Natural Science). All right reserved.
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页码：128 / 134
页数：6
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