倾斜角度射孔套管剩余强度有限元分析  

Analysis of Residual Strength of Inclined Angle Perforating Casing

作　　者：李明飞[1,2] 黄靖富 贾海 窦益华 梁经纬[1,2] 桑鹏飞 LI Mingfei;HUANG Jingfu;JIA Hai;DOU Yihua;LIANG Jingwei;SANG Pengfei(School of Mechanical Engineering,Xi'an Shiyou University,Xi'an,Shaanxi 710065,China;Xi'an Key Laboratory for Integrity Evaluation of Highly Difficult and Complex Oil and Gas Wells,Xi'an,Shaanxi 710065,China;CCDC Well Intervention Company,China National Petroleum Corporation,Chengdu,Sichuan 618300,China;Engineering Technology Research Institute,PetroChina Southwest Oil and Gas Field Company,Chengdu,Sichuan 610031,China)

机构地区：[1]西安石油大学机械工程学院,陕西西安710065 [2]西安市高难度复杂油气井完整性评价重点实验室,陕西西安710065 [3]中国石油集团川庆钻探工程有限公司试修公司,四川成都618300 [4]中国石油西南油气田公司工程技术研究院,四川成都618300

出　　处：《测井技术》2025年第1期117-122,共6页Well Logging Technology

基　　金：国家自然科学基金项目“多轮吞吐下CO_(2)注采井完井管柱特殊螺纹接头密封机理研究”(52374039);低渗透油气田勘探开发国家工程实验室开放课题“页岩油水平井压裂过程中套损机理研究”(2023014);中国石油天然气集团有限公司川庆钻探试修公司项目“超深井射孔-测试联作射孔段管柱强度安全评价技术研究”(CQSXFW2023-016)。

摘　　要：为了增加射孔有效穿透深度、建立高效的油气通道,射孔施工中经常要求射孔孔道沿储层平行方向,但是由于褶皱、断裂等地质构造原因常造成储层倾斜,就会使射孔孔道与套管非垂直相交,即导致射孔套管出现倾斜角度。倾斜射孔突破了现有射孔技术中射孔方向需要与套管垂直的局限性,但由于射孔后射孔孔眼改变了套管结构,当套管受外力作用后,孔眼周边会产生应力集中使得套管强度降低,射孔套管相比普通套管更容易发生损坏。由于现有文献对倾斜角度下射孔套管剩余强度的研究较少,通过建立有限元三维模型分析了倾斜射孔套管的剩余强度。分析结果表明,当孔径、孔密、相位角等射孔参数一定时,随着射孔倾斜角增加(从0增加到30°),套管的剩余抗外挤强度逐渐减小,射孔套管剩余强度的降低幅度不超过13.00%;当倾斜角度设定为30°、相位角由30°变化至180°时,射孔套管剩余强度变化幅值不超过10.20%;当相位角为90°时,射孔套管剩余强度为较优值。当倾斜角度设定为30°、孔径由10mm增加到18mm时,射孔套管剩余强度减小幅度可达17.45%。该分析结果可为倾斜角度射孔套管剩余强度分析和实际射孔施工应用提供理论支持。In order to increase the effective penetration depth of perforation and establish efficient oil and gas channels,it is often required that the perforation channels should be parallel to the reservoir direction during perforation construction.However,geological structures such as folds and faults often cause the reservoir to be inclined,which results in the channels intersecting the casing at an angle rather than perpendicularly,that is,the casing is perforated at an inclined angle.Inclined perforation breaks through the limitation in existing perforation technology that requires the perforation direction to be perpendicular to the casing.However,after perforation,the perforation holes alter the casing structure.When the casing is subjected to external forces,stress concentration occurs around the holes,reducing the casing's strength.As a result,perforated casings are more prone to damage compared to regular casings.Since there is relatively limited research on the residual strength of casing perforated at inclined angles.In this paper,a three-dimensional finite element model is established to analyze the residual strength of inclined perforated casing.The analysis results show that when the perforation parameters such as hole diameter,hole density,and phase angle are constant,as the perforation inclination angle increases(from 0 to 30°),the remaining external squeeze strength of the casing gradually decreases,and the reduction in the remaining strength of the perforation casing does not exceed 13.00%.When the inclination angle is set to 30°and the phase angle varies from 30°to 180°,the change in the remaining strength of the perforation casing does not exceed 10.20%.When the phase angle is 90°,the remaining strength of the perforation casing is relatively optimal.When the inclination angle is set to 30°and the hole diameter increases from 10 mm to 18 mm,the reduction in the remaining strength of the perforation casing can reach 17.45%.The study can provide theoretical support for the analysis of the remaini

关 键 词：倾斜射孔 套管剩余强度 相位角 有限元 

分 类 号：P631.84[天文地球—地质矿产勘探]