测井技术2025，Vol.49Issue(1)：117-122,6.DOI:10.16489/j.issn.1004-1338.2025.01.014
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
摘要
Abstract
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 remaining strength of inclined perforation casings and practical application in perforation construction.关键词
倾斜射孔/套管剩余强度/相位角/有限元Key words
inclined perforation/remaining casing strength/phase angle/finite element分类
天文与地球科学引用本文复制引用
李明飞,黄靖富,贾海,窦益华,梁经纬,桑鹏飞..倾斜角度射孔套管剩余强度有限元分析[J].测井技术,2025,49(1):117-122,6.基金项目
国家自然科学基金项目"多轮吞吐下CO2注采井完井管柱特殊螺纹接头密封机理研究"(52374039) （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) （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) （CQSXFW2023-016）
