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[1]赵垒,闫怡飞,王鹏,等.复杂气井套管力学分析与可靠度评价[J].中国安全生产科学技术,2018,14(12):67-72.[doi:10.11731/j.issn.1673-193x.2018.12.010]
　ZHAO Lei,YAN Yifei,WANG Peng,et al.Mechanical analysis and reliability evaluation on casing of complex gas well[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2018,14(12):67-72.[doi:10.11731/j.issn.1673-193x.2018.12.010]
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复杂气井套管力学分析与可靠度评价
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
14
期数:
2018年12期
页码:
67-72
栏目:
职业安全卫生管理与技术
出版日期:
2018-12-31

文章信息/Info

Title:
Mechanical analysis and reliability evaluation on casing of complex gas well
文章编号:
1673-193X(2018)-12-0067-06
作者:
赵垒1; 2; 闫怡飞1; 2; 王鹏3; 周晓奇4; 冯耀荣3; 闫相祯2
(1.中国石油大学（华东）机电工程学院，山东 青岛 266580；2. 中国石油大学（华东）油气CAE 技术研究中心，山东 青岛 266580；3. 中国石油天然气集团石油管工程重点实验室，陕西 西安 710065；4. 中原油田分公司 石油工程技术研究院，河南 濮阳 457000）
Author(s):
ZHAO Lei1; 2;  YAN Yifei1; 2;  WANG Peng3;  ZHOU Xiaoqi4;  FENG Yaorong3;  YAN Xiangzhen2
(1. College of Mechanical and Electronic Engineering, China University of Petroleum(East China), Qingdao Shandong 266580, China;2. Oil & Gas CAE Technology Research Center, China University of Petroleum(East China), Qingdao Shandong 266580, China;3. CNPC Key Laboratory of Tubular Goods, Xi’an Shaanxi 710065, China;4. Petroleum Engineering Technology Research Institute, SINOPEC Zhongyuan Oilfield Company, Puyang Henan 457000, China）
关键词:
非均匀地应力; 等效外挤力; 气井; 套管柱; 安全系数; 可靠指标; 蒙特卡洛法; 评价
Keywords:
nonuniform insitu stress;  equivalent external pressure;  gas well;  casing string;  safety factor;  reliability index;  MonteCarlo method;  evaluation
分类号:
X937
DOI:
10.11731/j.issn.1673-193x.2018.12.010
文献标志码:
A
摘要:
为建立考虑地层和套管参数随机性的套管可靠度评价理论方法，以便得到复杂井况下套管传统设计安全系数与可靠指标之间的关系，提出了非均匀地应力和内压联合作用下，沿套管最大外挤力方向管壁任意位置发生屈服失效时外壁等效均匀外挤力的计算方法；建立了套管抗挤和抗内压三轴强度计算公式以及有效内压计算方法；根据套管载荷和强度影响因素统计参数以及评价过程中参数测试标准值，利用蒙特卡洛法（MC）建立了完整的套管可靠度计算和评价方法；通过实例对传统安全系数与可靠指标的对应关系进行了研究。研究结果表明：指定条件下，套管安全系数与可靠指标之间存在对应关系；利用建立的方法编制计算程序可以为传统设计法中安全系数代表的安全程度进行量化；可靠度评价方法能够为安全系数的选取提供指导。
Abstract:
In order to establish a theoretical method for the reliability evaluation of casing with considering the randomness of formation and casing parameters, so as to obtain the relationship between the safety factor in traditional design and reliability index of the casing under the complex well conditions, a method for calculating the equivalent uniform external pressure of the outer wall of casing when the yield failure appeared at any position along the direction of the maximum external pressure of casing under the combined effect of nonuniform insitu stress and inner pressure was proposed. The calculation formulas of triaxial strength for anticollapse and resisting inner pressure of the casing were established, as well as the calculation method of effective internal pressure. According to the statistical parameters of impact factors of the casing load and strength as well as the standard values of parameters in the evaluation process, a complete reliability calculation and evaluation method of the casing was established by using the MonteCarlo (MC) method, and the corresponding relationship between the traditional safety factor and reliability index was studied by an example. The results showed that there was a correspondence relationship between the safety factor and reliability index of the casing under the specified conditions. Preparing the calculation program by using the established method could quantify the safety level represented by the safety factor in the traditional design method. The reliability evaluation method can provide the guidance for the selection of safety factor.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期： 2018-09-08
基金项目： 国家自然科学基金项目(51804330)；国家科技重大专项(2016ZX05017-003)；中石油科技计划项目（2016A-3905）；中央高校基本科研业务费专项资金项目（18CX02154A）
作者简介： 赵垒，博士研究生，主要研究方向为油气安全工程。
通信作者： 闫怡飞，博士，讲师，主要研究方向为油气安全工程。
更新日期/Last Update: 2019-01-03