| 玄武岩纤维堵漏体系在高海拔非开挖钻进中的应用研究 |
| 投稿时间：2022-02-27 修订日期：2022-04-14 点此下载全文 |
| 引用本文：周生伟,孙平贺,苏卫锋,等.玄武岩纤维堵漏体系在高海拔非开挖钻进中的应用研究[J].钻探工程,2022,49(3):139-145.ZHOU Shengwei,SUN Pinghe,SU Weifeng,et al. Use of basalt fiber drilling fluid in trenchless works at high altitudes[J]. Drilling Engineering, 2022,49(3):139-145. |
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| 基金项目:中石油管道局科技计划项目“高海拔地区山体定向穿越断层稳定性分析及泥浆技术研究”（编号：2019-07-01） |
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| 中文摘要:高海拔地区实施非开挖水平定向钻进时，裂隙发育地层的泥浆漏失不仅会影响泥浆的有效循环，还会形成大量的岩屑床，导致钻具过度磨损、摩阻异常增大、有效孔径减小等问题。针对西藏某地钻遇花岗岩裂隙，采用近景摄影测量技术对其进行量化表征，得到该区裂隙地层的缝宽<4 mm；提出采用玄武岩纤维作为裂隙封堵主剂，并建立随钻玄武岩纤维堵漏配方体系，实验结果表明：采用3、6和9 mm多级组合的玄武岩纤维堵漏效果最好，3 mm纤维复合惰性材料形成骨架结构，6和9 mm纤维可发挥一定强度的“加筋”作用。现场随钻实验结果表明：采用玄武岩纤维堵漏后，泥浆中固相含量下降幅度减少了13.14%，有效保障了长距离裂隙山体的有效、绿色、安全钻进。 |
| 中文关键词:裂隙地层 泥浆漏失 玄武岩纤维 堵漏 近景摄影测量 非开挖水平定向钻进 高海拔地区 |
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| Use of basalt fiber drilling fluid in trenchless works at high altitudes |
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| Abstract:In trenchless horizontal directional drilling in high-altitude areas， mud leakage in fracture-developed formation is one of the key problems that plagues trenchless works. It will not only affect the effective circulation of drilling fluid， but also form a large number of cuttings beds in the borehole. That will lead to other problems such as excessive wear of drilling tools， abnormal increase in frictional resistance， and reduction of the effective diameter. In view of the granite fractures in a Tibetan site， the close-range photogrammetry technology was used to quantitatively characterize the fractures， and found that the fracture width of the fractured strata in the study area was less than 4 mm. At the same time， basalt fiber is proposed as the main fracture plugging agent， and the formulation system of basalt fiber plugging-while-drilling has been established. The experimental results showed that the multi-grade combination of 3mm， 6mm and 9mm basalt fibers can achieve the best results， where the 3mm fiber can form a space skeleton structure with inert materials， and the 6mm and 9mm fibers can function as “reinforcing” with a certain strength. Results at the jobsite indicate that the solid phase content in the mud decreased by 13.14% with basalt fiber plugging， ensuring effective， green， and safe drilling for the long-distance mountain crossing with trenchless technology. |
| keywords:fractured formation mud leakage basalt fiber plugging close-range photogrammetry trenchless horizontal directional drilling high altitude areas |
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