摘要
为了提高页岩气水基钻井液的润滑性能，满足其环保和抗高温的要求，室内以改性植物油、有机多元醇、复合表面活性剂以及有机硼极压抗磨剂为原料，制备了一种抗高温环保润滑剂GWHB-11，并对其性能进行了评价。结果表明：在淡水基浆和盐水基浆中加入2.0%的GWHB-11后，润滑系数降低率大于90%，泥饼黏附系数降低率大于75%，润滑性能优良；改润滑剂具有良好的抗磨性能和耐温性能，耐温可达180 ℃，能够显著提高现场钻井液的润滑性能，且对其流变性能影响较小，配伍性较好；生物毒性较低，生物降解性良好，具有良好的环保性能。现场应用结果表明，与使用其他常用润滑剂的邻井相比，使用润滑剂GWHB-11后，W-1井和W-2井起下钻摩阻明显降低，机械钻速提高，有效提高了钻井效率，取得了较好的施工效果。
Abstract
In order to improve the lubricity of shale gas water-based drilling fluid and meet the requirements of environmental protection and high temperature resistance, a high temperature resistant and environmental protection lubricant GWHB-11 was prepared by using modified vegetable oil, organic polyol, composite surfactant and organic boron extreme pressure anti-wear agent as raw materials, and its performance was evaluated. The results show that after 2.0% GWHB-11 is added into fresh water base slurry and salt water base slurry, the reduction rate of lubrication coefficient is more than 90%, and the reduction rate of mud cake adhesion coefficient is more than 75%, and the lubrication performance is excellent. The lubricant GWHB-11 has good anti-wear performance and temperature resistance, and the resistant temperature can reach 180 ℃. The lubricant GWHB-11 can significantly improve the lubrication performance of drilling fluid on site, and effect on its rheological property is less and the compatibility is good. The lubricant GWHB-11 has low toxicity, good biodegradability and good environmental protection performance. The field application results show that compared with the adjacent wells using other common lubricants, the trip friction of well W-1 and well W-2 that use the lubricant GWHB-11 is significantly reduced, its rate of penetration is significantly increased, the drilling efficiency is effectively improved and the construction effect is better.
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