| 基于残余应力的热采井套管安全评价分析 |
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| 引用本文： | 陈勇,练章华,陈若铭,宋朝晖,艾才云,钟智慧. 基于残余应力的热采井套管安全评价分析[J]. 石油矿场机械, 2009, 38(4): 16-19 |
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| 作者姓名： | 陈勇 练章华 陈若铭 宋朝晖 艾才云 钟智慧 |
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| 作者单位： | 1. 西部钻探工程有限公司,克拉玛依钻井工艺研究院,新疆,克拉玛依,834000
2. 西南石油大学,油气藏地质及开发工程国家重点实验室,成都,610500 |
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| 摘 要： | 针对热采井中套管接头螺纹发生漏失和滑脱现象，采用有限元数值模拟，得到井筒的温度场分布，将温度场导入到应力场中计算套管残余拉应力与吞吐周期的变化规律，并进行曲线拟合，建立了适合于蒸汽吞吐过程中套管残余应力评估的关系式；结合套管的剩余强度和极限剩余强度对套管进行了安全评价。该研究结果为建立合理的热采井套管损坏预防措施提供了理论依据。
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| 关 键 词： | 热采井 套管螺纹 残余拉应力 有限元分析 极限剩余强度 |
Analysis for Casing Safety Evaluation Based on Residual Stress in Thermal Well |
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| CHEN Yong,LIAN Zhang-hua,CHEN Ruo-ming,SONG Zhao-hui,AI Cai-yun,ZHONG Zhi-hui. Analysis for Casing Safety Evaluation Based on Residual Stress in Thermal Well[J]. Oil Field Equipment, 2009, 38(4): 16-19 |
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| Authors: | CHEN Yong LIAN Zhang-hua CHEN Ruo-ming SONG Zhao-hui AI Cai-yun ZHONG Zhi-hui |
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| Affiliation: | CHEN Yong ,LIAN Zhang-hua ,CHEN Ruo-ming, SONG Zhao-hui ,AI Cai-yun ,ZHONG Zhi-hui(1. Drilling Technology Research Institute of Kelamayi, Kelamayi 834000,China;2. State Key Lab of Oil and Gas Reservoir Geology and Exploitation ,Southwest Petroleum University ,Chengdu 610500,China) |
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| Abstract: | In order to handle leakage and slippage of casing threaded connector in steam stimulation, temperature field was obtained by using finite element method （FEM）. Temperature field was imported to stress field to calculate varying history of casing residual stress with stimulation cycles, and the formula suitable for evaluating the residual stress on casing was established by curve fitting. Safety evaluation to casing was made through the formula, residual stiffness and ultimate residual stiffness. The analysis provided theory reference to set up advisable preventive measures for casing failure in steam injection well. |
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| Keywords: | thermal production well casing thread residual tension stress FEA ultimate residual stiffness |
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