| 西藏伦坡拉盆地钻井实践 |
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| 引用本文： | 陈天成. 西藏伦坡拉盆地钻井实践[J]. 石油钻采工艺, 2001, 23(5): 15-18,83. DOI: 10.3969/j.issn.1000-7393.2001.05.005 |
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| 作者姓名： | 陈天成 |
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| 作者单位： | 1.中国石化勘探开发研究院石油钻井研究所, 山东德州 253005 |
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| 摘 要： | 西藏伦坡拉盆地属陆相第三系走滑拉张性质的盆地,地层特征复杂,井斜、井漏、井塌严重,中深井钻井成井率低,深井钻探十分困难,由于先期钻井认识不足,井深大于 2 2 0 0m的井有 4口,其中藏 1井深 2 3 3 4.4 7m,西伦 3井深 2 3 62.86m,西伦 6井深 2 2 86m,都在 2 0 0 0m左右的牛二段中底部发生了井壁垮塌事故,只有西伦 2井在 2 80 2m完成了地质勘探任务。1996年后加大了科研力度,改进了井身结构,顺利地完成了班深 1井 3 2 2 3.3 2m的钻井任务。重点介绍了伦坡拉盆地出现的井下复杂现象,进行了原因分析,给出了相应的解决方法。
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| 关 键 词： | (伦坡拉盆地) 地层压力 井斜 井塌 井漏 定向 纠斜 井身结构 |
| 收稿时间： | 2019-05-19 |
| 修稿时间： | 2001-05-18 |
Drilling Practices in Lunpola Basin of Tibet |
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| by Chen Tiancheng. Drilling Practices in Lunpola Basin of Tibet[J]. Oil Drilling & Production Technology, 2001, 23(5): 15-18,83. DOI: 10.3969/j.issn.1000-7393.2001.05.005 |
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| Authors: | by Chen Tiancheng |
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| Affiliation: | 1.Drilling Research Dept. of Exploration and Development Research Inst., SINOPEC |
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| Abstract: | Hole deviation, lost circulation and hole sloughing is very serious in Lunpola Basin of Tibet, a strike-slip tension basin of the Tertiary, which has very complicated geological conditions, and deep well drilling is especially difficult in this area. In the four deep wells that over 2200m, only well Xilun-2 is successfully drilled to TD at 2802m, while other three wells, well Zang-1 of 2334.47m, well Xilun-3 of 2362.86m and well Xilun-6 of 2286m, all encountered serious hole collapse at about 2000m. By improving the casing program and drilling technology since 1996, well Banshen-1 of 3223.32m of TD is successfully drilled.. The downhole troubles and their causes are investigated, and the corresponding solutions are illustrated. |
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| Keywords: | Lunpola Basin formation pore pressure hole deviation hole caving lost circulation directional well hole straightening casing program |
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