| 用稳定性理论和方法研究井壁坍塌问题 |
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| 引用本文： | 殷有泉,陈朝伟. 用稳定性理论和方法研究井壁坍塌问题[J]. 北京大学学报(自然科学版), 2009, 45(4): 559 |
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| 作者姓名： | 殷有泉 陈朝伟 |
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| 作者单位： | 1.北京大学工学院力学与空天技术系，北京100871； 2.中国石油集团钻井工程技术研究院，北京100195；， E-mail：chenzwdri@cnpc.com.cn |
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| 基金项目： | 中国石油集团钻井工程技术研究院青年基金(DRI2008J01)资助 |
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| 摘 要： | 给出了钻井过程井壁围岩的应力场和位移场的解析解。在此基础上，建立了井壁压力和井壁位移的平衡路径曲线，提出井壁坍塌是一种极值点型失稳现象，澄清了石油工程中的一些问题。得到了井壁失稳的临界压力公式，并给出了气体钻井的适用条件。
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| 关 键 词： | 稳定性 井壁破坏 井壁坍塌 初应力提法 |
| 收稿时间： | 2008-07-29 |
Study on Wellbore Collapse Using the Theory and Method of Stability |
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| YIN Youquan,CHEN Zhaowei. Study on Wellbore Collapse Using the Theory and Method of Stability[J]. Acta Scientiarum Naturalium Universitatis Pekinensis, 2009, 45(4): 559 |
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| Authors: | YIN Youquan CHEN Zhaowei |
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| Affiliation: | 1.Department of Mechanics and Aerospace Engineering，College of Engineering，Peking University，Beijing 100871；2. Drilling Research Institute，CNPC，Beijing 100195；，E-mail：chenzwdri@cnpc.com.cn |
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| Abstract: | The analytical solutions for stress and displacement around a borehole during drilling were given.On the base of the solutions,the balance path curve for pressure and displacement at the face of the wellbore was drawn.The conclusion is that wellbore collapse is an instability phenomenon of extreme point type,and a number of issues in oil industry are clarified.At last,the formula of critical pressure for wellbore collapse is derived,and the condition for air and gas drilling is analyzed. |
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| Keywords: | stability wellbore failure wellbore collapse method of initial stress |
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