| 东乘公麻冻土地层低温冲洗液研究与应用 |
| 投稿时间：2021-03-18 修订日期：2021-06-13 点此下载全文 |
| 引用本文：丁付利,段晓,皮建伟.东乘公麻冻土地层低温冲洗液研究与应用[J].钻探工程,2022,49(1):104-109.DING Fuli,DUAN Xiao,PI Jianwei. Research and application of low-temperature drilling fluid for permafrost strata in the Dongchenggongma area[J]. Drilling Engineering, 2022,49(1):104-109. |
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| 基金项目:中央财政项目“青海省都兰-同德-甘德地区金及多金属资源调查评价”（编号：1212011220665） |
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| 中文摘要:结合东乘公麻金矿区地层特性和高原冻土环境实际，钻进过程中存在冻土地层融化、孔壁膨胀崩塌、钻孔越打越浅、岩心采取困难、钻孔冻结等技术难题。通过对钻探施工设备、施工工艺和施工管理进行研究和分析，重点研究了低温冲洗液性能对钻进过程的影响。通过正交试验对冲洗液配方在-5 ℃条件下对比，优选出抗低温、散热系数小、粘度适中、滤失量低的最佳配方，有效解决了高原冻土地层钻进技术难题。在CZK031和CZK4821两个钻孔进行现场应用，冲洗液对孔壁保护较好，未发生孔壁坍塌掉块和孔内冻结事故，取得了较好的施工效果。低温冲洗液配方的研究应用，对其他地区高原冻土地层施工具有参考意义。 |
| 中文关键词:冻土地层 冲洗液 低温 工业盐 钻进效率 |
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| Research and application of low-temperature drilling fluid for permafrost strata in the Dongchenggongma area |
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| Abstract:Drilling problems， such as melting permafrost strata， expansion and collapse of hole walls， less drilling depth， core taking difficulty， borehole freezing， are encountered in the process of drilling due to the characteristics of strata and the fact of the plateau permafrost environment of Dongchenggongma. Drilling equipment， drilling technology and drilling management was investigated with the focus on the effect of low-temperature drilling fluid properties on drilling process. Orthogonal experiment was conducted to compare the formulation of flushing fluid at -5℃ to select the optimum formulation with low temperature resistance， small heat dissipation coefficient， proper viscosity and low filtration loss， and it effectively solved the drilling problem in plateau permafrost strata. Field use in two boreholes of CZK031 and CZK4821 showed the hole wall was well protected by the drilling fluid， and no collapse and freezing accidents occurred， achieving good drilling effect. The research and application of low-temperature drilling fluid formulation can provide reference for drilling in plateau permafrost strata in other areas. |
| keywords:permafrost strata drilling fluid low temperature industrial salt drilling efficiency |
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