| 基于统计损伤的井壁坍塌压力模型 |
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| 引用本文： | 邱康,陈勉,金衍.基于统计损伤的井壁坍塌压力模型[J].岩土力学,2011,32(7):2029-2033. |
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| 作者姓名： | 邱康 陈勉 金衍 |
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| 作者单位： | 中国石油大学（北京）油气资源与探测国家重点实验室，北京 102249 |
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| 基金项目： | “973”计划，教育部新世纪优秀人才支持计划 |
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| 摘 要： | 目前在计算油气井壁坍塌压力时，通常采用摩尔-库仑准则，该准则没有考虑中间应力对岩石破坏过程的影响，计算结果比较保守，限制了低密度钻井液发展。针对这一情况，考虑岩石破坏过程中的损伤，基于统计损伤原理，对统一强度准则进行了修正，并利用修正后的强度准则建立了新的井壁坍塌压力模型。结果表明，修正后的统一强度准则能更好地模拟岩石强度，利用该准则建立的井壁坍塌模型计算出的坍塌压力比传统的摩尔-库仑准则低，准确率更高
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| 关 键 词： | 损伤力学 统一强度准则 准则修正 坍塌压力 井壁 |
| 收稿时间： | 2010-11-16 |
Model of well casing collapse pressure based on statistical model of rock damage |
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| QIU Kang,CHEN Mian,JIN Yan.Model of well casing collapse pressure based on statistical model of rock damage[J].Rock and Soil Mechanics,2011,32(7):2029-2033. |
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| Authors: | QIU Kang CHEN Mian JIN Yan |
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| Institution: | State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249,China |
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| Abstract: | At present,the Mohr-Coulomb criterion is usually used to calculate well casing collapse pressure in oil and gas wells.Since this criterion doesn't take the impact of the intermediate stress in rock failure process into consideration,the calculated result is conservative and hence limits the development and application of low-density drilling fluid.For this situation,it is often advisable to apply the unified strength criterion.In this paper,the unified strength criterion is adopted and modified,based on the... |
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| Keywords: | damage mechanics unified strength criterion modified criteria collapse pressure well casing |
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