大曲率定向连续取心技术研究与应用

doi:10.3799/dqkx.2026.178

大曲率定向连续取心技术研究与应用

doi: 10.3799/dqkx.2026.178

1. 中国电建集团成都勘测设计研究院有限公司, 四川成都 610072;
2. 中国地质科学院探矿工艺研究所, 四川成都 610081

基金项目:

国家自然科学基金(U22A20601)

西部地区复杂地层绿色钻探技术支撑(DD202402054)

中国电建核心攻关项目(DJ-HXGG-2024-07)。

详细信息

作者简介:
张世殊,1970年8月生,男,主要从事深地工程生产与科研工作。国家百千万人才工程专家,国家有突出贡献的中青年专家,获国务院政府特殊津贴,李四光地质科学奖获得者,四川省“天府青城计划”卓越工程师,四川省工程勘察设计大师,中国电建集团首席技术专家。邮箱:1992070@chidi.com.cn

通讯作者:
张世殊,1970年8月生,男,主要从事深地工程生产与科研工作。国家百千万人才工程专家,国家有突出贡献的中青年专家,获国务院政府特殊津贴,李四光地质科学奖获得者,四川省“天府青城计划”卓越工程师,四川省工程勘察设计大师,中国电建集团首席技术专家。邮箱:1992070@chidi.com.cn

中图分类号: P634.6
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出版历程
- 收稿日期: 2025-12-03
- 网络出版日期: 2026-06-29

Research and Application of High-Angle Curved Directional Continuous Coring Technology

1. PowerChina Chengdu Engineering Corporation Limited, Chengdu 610072, China;
2. Institute of Exploration Technology, Chinese Academy of Geological Sciences, Chengdu 610081, China

摘要

摘要: 伴随能源、交通、国家水网等强国战略工程的实施，我国已成为地下工程建设数量、规模和难度最大的国家。西部地区工程建设大多面临高海拔、高埋深、高应力、高水压和大落差的极端地质环境，精细化勘察势在必行。针对西部地区某水电工程深切河谷区域横纵岩性展布规律不明确、定向精细化勘察难度大等问题，研发绳索取心柔性导向取心钻具，建立基于Bezier理论的轨迹控制模型，构建“柔性导向取心钻具+Bezier理论轨迹控制模型”的工作模式，形成大曲率定向连续取心方法技术体系，完成艰险复杂地质区域千米级大曲率定向连续取心精准轨迹控制，实现精细化勘察目标。应用结果表明：（1）建立柔性导向取心钻具在不同控制点下的力学仿真模型，仿真结果表明：稳定器距钻头距离越远，钻头横向应力、最大应力、挠度等均减小，表明稳定器距离钻头越近造斜强度越大。（2）基于Bezier理论的轨迹控制模型计算轨迹控制参数与实测值的最大误差在5%以内；（3）千米级曲线钻孔实际终孔孔斜78°，满足地质要求，终孔方位角212°，与初始方位角误差仅为0.95%，实现大曲率造斜段连续取心，且国内外首次取出弯曲状岩心，轨迹控制较好，可为艰险复杂地质区域的大曲率定向连续取心钻探提供技术支撑。
- 极端地质环境 /
- 柔性导向取心钻具 /
- 大曲率连续取心 /
- 随钻轨迹控制
Abstract: Driven by the implementation of national strategic projects such as energy, transportation and national water network construction, China has become a global leader in the scale, quantity and complexity of underground engineering. Engineering constructions in western China are frequently challenged by extreme geological conditions including high altitude, large burial depth, high geostress, high water pressure and great height difference, making refined geological investigation an urgent requirement. Aiming at the problems of unclear lithologic distribution and difficult directional refined exploration in deep valley areas of hydropower projects in western China, a wireline flexible steering coring tool was developed, and a trajectory control model based on Bezier theory was established. A technical framework of “flexible steering coring tool + Bezier trajectory control model” was proposed, forming a complete technical system for high-curvature directional continuous coring. Precise trajectory control for kilometer-scale high-curvature directional continuous coring was successfully achieved in complex and difficult geological areas, satisfying the demands of refined geological exploration. The application results show that: (1) Mechanical simulation of the flexible steering coring tool reveals that the lateral stress, maximum stress and deflection of the drill bit decrease as the stabilizer moves away from the bit, verifying that a shorter stabilizer-to-bit distance produces higher deflecting strength. (2) The maximum relative error between the trajectory parameters calculated by the Bezier-based model and the field-measured values is less than 5%. (3) The final inclination of the kilometer-scale curved borehole is 78°, fully meeting the geological requirements; the final azimuth is 212°, with an error of only 0.95% relative to the initial azimuth. Continuous coring in the high-curvature deflecting section is realized, and curved cores are successfully obtained for the first time worldwide with favorable trajectory control performance. The research results can provide solid technical support for high-curvature directional continuous coring drilling in difficult and complex geological areas.
- extreme geological conditions /
- flexible guided coring tool /
- high-angle curved continuous coring /
- while-drilling trajectory control

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