| 细观损伤力学在气体钻井井壁稳定性研究中的应用 |
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| 引用本文： | 周翔宇,邹灵战,邓金根,郑立会.细观损伤力学在气体钻井井壁稳定性研究中的应用[J].重庆科技学院学报(自然科学版),2010,12(6). |
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| 作者姓名： | 周翔宇 邹灵战 邓金根 郑立会 |
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| 作者单位： | 中国石油大学,北京,102249;中国石油集团钻井工程技术研究院,北京,100085 |
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| 基金项目： | 长江学者和创新团队发展计划项目(IRT0411); 全国百篇优秀博士论文基金项目(200349) |
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| 摘 要： | 用RFPA2D软件建立气体钻井井眼稳定的损伤力学模型,通过跟踪声发射信号研究井壁围岩在应力下的损伤演化,从细观损伤力学的角度探讨气体钻井时井壁围岩的损伤演化,以及转换介质后井壁失稳的原因。研究发现,气体钻井时井眼周围一定范围内出现损伤区,损伤区内形成微裂纹和裂缝,转换介质后由于泥浆渗入、压力波动而导致损伤区坍塌。
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| 关 键 词： | 气体钻井 井壁稳定 损伤力学 |
Wellbore Stability in Gas Drilling by Meso-damage Mechanics |
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| ZHOU Xiang-yu,ZOU Ling-zhan,DENG Jin-gen,ZHENG Li-hui.Wellbore Stability in Gas Drilling by Meso-damage Mechanics[J].Journal of Chongqing University of Science and Technology:Natural Science Edition,2010,12(6). |
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| Authors: | ZHOU Xiang-yu ZOU Ling-zhan DENG Jin-gen ZHENG Li-hui |
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| Affiliation: | ZHOU Xiang-yu1 ZOU Ling-zhan2 DENG Jin-gen1 ZHENG Li-hui1 (1.China University of Petroleum,Beijing 102249,2.CNPC Drilling Research Institute,Beijing 100085) |
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| Abstract: | The study of borehole stability is the key technique to solve the puzzle of gas drilling adaptability. It has significance to promote the application of gas drilling,to run-up the ROP of drill and to accelerate the progress of oil and gas exploitation and exploration. Numerical model of borehole in gas drilling is set up by using RFPA2D,and damage evolution around borehole is studied by tracking acoustic emissions. The study indicates that there exists a damage zone around borehole in gas drilling. In excav... |
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| Keywords: | gas drilling wellbore stability damage mechanics |
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