| 有渗流作用的油井井壁稳定性的解析分析 |
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| 引用本文： | 李忠华, 潘一山. 有渗流作用的油井井壁稳定性的解析分析[J]. 工程力学, 2002, 19(3): 105-108. |
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| 作者姓名： | 李忠华 潘一山 |
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| 作者单位： | 辽宁工程技术大学力学与工程科学系, 辽宁, 阜新, 123000 |
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| 摘 要： | 本文将岩石视为多孔介质,考虑渗流作用,应用弹塑性理论和损伤力学,导出了井壁围岩的应力分布规律,并应用动力判别准则提出了力学意义上严格的井壁稳定条件,给出了渗流作用下井壁稳定的孔隙压力的临界值.提出当井壁孔隙压力接近临界值时,井壁处于非稳定平衡状态,在有动力扰动的情况下,井壁因失稳而坍塌.
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| 关 键 词： | 井眼稳定性 渗流 临界载荷 损伤 解析分析 |
| 文章编号： | 1000-4750(2002)03-105-04 |
| 收稿时间： | 2000-10-08 |
| 修稿时间： | 2001-01-06 |
STABILITY ANALYSIS OF WELLBORE WITH PERMEATION |
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| LI Zhong-hua, PAN Yi-shan. STABILITY ANALYSIS OF WELLBORE WITH PERMEATION[J]. Engineering Mechanics, 2002, 19(3): 105-108. |
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| Authors: | LI Zhong-hua PAN Yi-shan |
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| Affiliation: | Dept. of Mechanics and Engineering Sciences, Liaoning Technical University, Fuxin, China 123000 |
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| Abstract: | As a porous medium, rocks have permeation effects. Elastic-plastic theory and damage mechanics are used to obtain the stress distribution of rocks around wellbore. With dynamic discriminant, strict stable conditions for wellbore are put forward, and critical stress values of wellbore are acquired take into account the permeable effect. When the stress of wellbore is close to critical loads, wellbore is in the state of instability, and when dynamic disturbance is present, wellbore will collapse because of instability. |
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| Keywords: | wellbore stability permeation critical load damage analysis |
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