厄立特里亚Zara金矿大角度斜孔钻探施工技术

介绍厄立特里亚Zara金矿大角度斜孔钻探施工情况,重点针对防斜保直钻进技术要求、复杂地层护壁堵漏、"打滑"地层提速增效等钻探技术进行实践探索。阐述了钻具组合合理配置、冲洗液使用工艺、钻进参数合理选择、钻头合理选用等方面技术措施。在初次完成大角度斜孔钻探施工中摸索和积累施工经验,为今后类似项目的进一步开展打下技术和管理基础。

Drilling Construction Technology of Large Angle Inclined Hole in Zara Golden Deposit in Eritrea

The drilling construction situation of large angle inclined hole in Zara golden deposit in Eritrea is introduced. The practice and exploration are carried out on the requirements of hole deviation control technology, hole wall protection and plugging in complex formation, drilling efficiency improvement in slipping formation and some more drilling technologies. Rational configuration of bottom-hole assembly, washing fluid using technology, drilling parameter selection and bits selection are demonstrated. The exploration process and construction experience will be the foundation of similar projects in the future.