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针对传统水基钻井液的特点 ,引入满足环保要求的醇醚化合物替代油类润滑剂 ,并以此建立含醇醚水基钻井液体系。经室内研究和现场应用表明 :该体系具有优良的润滑性 ,良好的井眼清洁能力 ,井壁稳定和抑制能力接近油基钻井液水平 ,无荧光不干扰地质录井 ,储层保护效果好。生物毒性检测结果表明 ,该体系具有环境可接受性。现场应用近 30口井并取得成功。
Aiming at the characteristics of traditional water-based drilling fluid, the alcohol ether compound that meets the environmental protection requirements is introduced instead of the oil lubricant, and an alcohol ether-based water-based drilling fluid system is established. The indoor research and field application show that the system has good lubricity, good wellbore cleaning ability, well wall stability and suppression ability close to the oil-based drilling fluid level, and no fluorescence does not interfere with geological logging, and the reservoir protection effect is good. Biotoxicity test results show that the system is environmentally acceptable. Nearly 30 wells were used and successfully achieved.