曾义金. 海相碳酸盐岩超深油气井安全高效钻井关键技术[J]. 石油钻探技术, 2019, 47(3): 25-33. DOI: 10.11911/syztjs.2019062
引用本文: 曾义金. 海相碳酸盐岩超深油气井安全高效钻井关键技术[J]. 石油钻探技术, 2019, 47(3): 25-33. DOI: 10.11911/syztjs.2019062
ZENG Yijin. Key Technologies for Safe and Efficient Drilling of Marine Carbonate Ultra-Deep Oil and Gas Wells[J]. Petroleum Drilling Techniques, 2019, 47(3): 25-33. DOI: 10.11911/syztjs.2019062
Citation: ZENG Yijin. Key Technologies for Safe and Efficient Drilling of Marine Carbonate Ultra-Deep Oil and Gas Wells[J]. Petroleum Drilling Techniques, 2019, 47(3): 25-33. DOI: 10.11911/syztjs.2019062

海相碳酸盐岩超深油气井安全高效钻井关键技术

Key Technologies for Safe and Efficient Drilling of Marine Carbonate Ultra-Deep Oil and Gas Wells

  • 摘要: 塔里木盆地及四川盆地海相碳酸盐岩油气资源埋深超过7 000.00 m,地层具有层系多、非均质性强和高温高压等特点,钻井难度大、风险高,存在机械钻速低、井筒完整性易失效等突出工程问题。为此,研制了一批新型钻井提速工具及耐高温测量仪器与固井工具,研发了耐高温的高密度钻井液体系、环保型低摩阻钻井液、高性能堵漏浆和防气窜固井水泥浆,发展了硬地层协同破岩快速钻井技术、缝洞型高压油气井“预–监–控–压”闭环式安全控制钻井配套技术及超深小井眼水平井井眼轨迹测控关键技术,完成了多口井深超8 000.00 m的高难度超深井钻井施工,创造了多项工程纪录,有力支撑了新疆顺北、川西超深海相碳酸盐岩油气的勘探开发。

     

    Abstract: The marine carbonate oil and gas resources in the Tarim Basin and the Sichuan basin have a burial depth of more than 7 000.00 m, with multiple producing formations which exhibit strong heterogeneity, high temperature and high pressure, difficulty in drilling and high risks, all of which result in engineering problems, such as low ROP in drilling/completion, high risk of wellbore integrity failure, etc. To this end, a series of tools and products have been developed, including new drilling speed-up tools, high temperature resistant measuring instruments and cementing tools. Additionally, the following were developet: a high-density drilling fluid system with high temperature resistance; an environmentally-friendly low-friction, high performance plugging system; and an anti-gas channeling cement slurry system. Meanwhile, the rapid drilling technology for penetrating hard formations in a synergistic way. The goal of " precaution-monitoring-control-pressure” closed-loop safety control drilling matching technology for fractured-cave high pressure oil/gas wells was achieved, and key borehole trajectory measurement and control technology for ultra-deep slim hole horizontal wells wee developed. The application of those technologies in drilling many ultra-deep wells with the depth of over 8 000.00 m has set several engineering records, and strongly supported the exploration & development of ultra-deep marine oil/gas wells in Shunbei, Xinjiang and Western Sichuan.

     

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