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<p>The main treating agent of the vegetable gum drilling fluid system is preferred and evaluated on account of its good performance. Based on the laboratory orthogonal experimental research, it is confirmed that the composition of vegetable gum drilling fluid include: water + 3%bentonite + 0.6%soda ash + 0.4%ZWJ-B(vegetable gum, natural polymer coating agent)+1-1.5%ZWJ-J(vegetable gum, natural polymer filtrate reducer) + 2-3%HX-KYG(high temperature stabilizer, filtrate reducer) + 0.2%XC-T (high temperature protective agent, viscosifier) + 2%SWH-F(inhibitor, formation sealing and anti-caving agent) + 2%SWH-R+3-4%polyethylene glycol + barite + 15%weigh3(deoxidant, water soluble weighting agent). It is indicated from laboratory performance evaluation that: the shale recovery rate of the vegetable gum drilling fluid system is up to 96.76% with low core expansion rate, good inhibition performance, 9mL high temperature and pressure water loss, 1mm mud cake, 0.05 mud cake friction coefficient, and lowest friction coefficient of different fluids and friction surfaces, at the same time the oil layer protection effect is better than other water-based drilling fluids and the temperature resistance up to 180°C. The evaluation results show that the vegetable gum drilling fluid system EC50 is greater than 30000 mg/L, which meets the national marine I level emission standards. And it is non-stimulating to the eyes and skin, non-toxic, and easily biodegradable.</p>

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Research on Composition and Performance Evaluation of Environmentally Friendly Vegetable Gum Drilling Fluid System

  • 期刊论文

  • 发表日期：

    2025年9月1日

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  • Fengxia Li,
  • Zhengku Wang,
  • Jianian Xu,
  • Hongli Liu,
  • Jiyin Zhang

摘要

The main treating agent of the vegetable gum drilling fluid system is preferred and evaluated on account of its good performance. Based on the laboratory orthogonal experimental research, it is confirmed that the composition of vegetable gum drilling fluid include: water + 3%bentonite + 0.6%soda ash + 0.4%ZWJ-B(vegetable gum, natural polymer coating agent)+1-1.5%ZWJ-J(vegetable gum, natural polymer filtrate reducer) + 2-3%HX-KYG(high temperature stabilizer, filtrate reducer) + 0.2%XC-T (high temperature protective agent, viscosifier) + 2%SWH-F(inhibitor, formation sealing and anti-caving agent) + 2%SWH-R+3-4%polyethylene glycol + barite + 15%weigh3(deoxidant, water soluble weighting agent). It is indicated from laboratory performance evaluation that: the shale recovery rate of the vegetable gum drilling fluid system is up to 96.76% with low core expansion rate, good inhibition performance, 9mL high temperature and pressure water loss, 1mm mud cake, 0.05 mud cake friction coefficient, and lowest friction coefficient of different fluids and friction surfaces, at the same time the oil layer protection effect is better than other water-based drilling fluids and the temperature resistance up to 180°C. The evaluation results show that the vegetable gum drilling fluid system EC50 is greater than 30000 mg/L, which meets the national marine I level emission standards. And it is non-stimulating to the eyes and skin, non-toxic, and easily biodegradable.