超深水浅层气藏无隔水管测试管柱力学性能分析  

Mechanical performance analysis of test string in ultra deep water shallow gas reservoirs with riserless system

作　　者：任冠龙 刘贤玉 孟文波 彭巍 孙巧雷[2] REN Guanlong;LIU Xianyu;MENG Wenbo;PENG Wei;SUN Qiaolei(CNOOC Zhanjiang Branch Company,Zhanjiang,Guangdong 524057,China;School of Mechanical Engineering,Yangtze University,Jingzhou,Hubei 434023,China)

机构地区：[1]中海石油(中国)有限公司湛江分公司,广东湛江524057 [2]长江大学机械工程学院,湖北荆州434023

出　　处：《油气井测试》2025年第1期15-20,共6页Well Testing

基　　金：国家重点研发计划“深海和极地关键技术与装备”重点专项:“海洋天然气水合物、浅层气、深部气目标评价及合采技术”(2021YFC2800900)。

摘　　要：超深水浅层气藏无隔水管测试作业存在着流固耦合、一体化测试干扰、井筒流动安全保障困难等问题。通过优化测试管柱海水段传热特性,基于管柱微元受力模型,建立了无隔水管海水段测试管柱力学模型,分析了不同测试管柱组合在作业海域海洋环境参数及平台偏移工况下的应力弯矩等性能。优选了超深水浅层气藏无隔水管系统下测试管柱组合和套管井口组合,并通过测试管柱疲劳和泄漏风险分析,得出在短周期内不存在疲劳风险,当泄漏气液混合体充斥于作业平台四分之一处时,在设计工况风速下,平台因平衡状态横摇角度幅值小于17°时可满足作业标准要求。研究成果可为超深水浅层气藏无隔水管安全测试设计及工程应用提供技术支持,实现了对超深水浅层气藏的低成本快速安全评价。There are problems such as fluid-solid coupling,integrated testing interference,and difficulty in ensuring wellbore flow safety during the testing operation of ultra deep and shallow gas reservoirs without a riser.By optimizing the heat transfer characteristics of the seawater section of the test strings and based on the micro element stress model of the strings,a mechanical model of the test strings in the seawater section without a riser was established.The stress and bending moment performance of different combinations of test strings under marine environmental parameters and platform offset conditions in the operating area were analyzed.The optimized test strings and casing wellhead combination for the ultra deep water and shallow gas reservoir without a riser system were recommended.Through fatigue and leakage risk analysis of the test strings,it was found that there is no fatigue risk in the short cycle of the test strings.At the design wind speed,when the platform′s roll angle amplitude is less than 17°due to the equilibrium state,it can meet the operating standards.The research results can provide technical support for the design and engineering application of safety testing without a riser and can achieve low-cost and rapid safety evaluation of the ultra deep water and shallow gas reservoirs.

关 键 词：超深水 浅层气藏 地层测试 无隔水管系统 管柱力学 疲劳分析 泄漏风险 

分 类 号：TE27[石油与天然气工程—油气井工程]