摘要
复杂的井下环境导致振动工况下固井套管柱系统振动响应异常复杂。为揭示固井套管柱系统动力学行为规律,该研究首先考虑钻井液、水泥浆和扶正器等因素,建立固井套管柱系统动力学模型并运用分离变量法和模态叠加法对系统的振动特性和振动位移响应进行求解。在此基础上,通过模态试验和振动响应试验验证模型的正确性。最后,研究套管柱参数、流体参数和扶正器刚度等对固井套管柱系统振动特性和振动位移响应的影响机理,分析振动在套管柱上的传播规律。结果表明:流体密度和套管柱材料参数对振动特性影响显著。套管柱尺寸参数、阻尼比和扶正器刚度对系统振动特性和振动位移响应均显著性影响。在满足固井工艺要求的前提下,选取小直径薄壁套管,黏滞系数较小的水泥浆和低刚度的扶正器将有益于提高振动响应幅值。在振动固井作业时,激励频率的选取应该综合考虑振动响应幅值和振动分布。该研究为精确求解固井套管柱系振动响应和振动固井装备参数设计及应用提供了理论依据和技术支撑。
Due to the complex downhole environment,a cementing casing system’s response under vibration conditions is very complicated.To reveal the dynamic behavior of the cementing casing system,considering factors such as the effects of fluid and centralizer,a dynamic model of the cementing casing system was established firstly.And the vibration characteristics and vibration displacement response of the system were solved by using the separation of variables and modal superposition methods.Then,on this basis,the correctness of the model was verified by modal tests and vibration response tests.Finally,the influence mechanisms of the casing string parameters,fluid parameters,and centralizer stiffness on the vibration characteristics and vibration displacement response of the system were studied,and the propagation of vibration on the casing string was analyzed.The results indicate that the fluid density and casing material parameters have a significant impact on the vibration characteristics.The size parameters of the casing string,damping ratio,and stiffness of the stabilizer have a significant impact on the vibration characteristics and displacement response of the system.On the premise of meeting the requirements of cementing technology,selecting small-diameter thin-walled casing,cement slurry with low viscosity coefficient,and low stiffness stabilizer will be beneficial for improving the amplitude of vibration displacement response.During the vibration cementing operation,the selection of excitation frequency should comprehensively consider the magnitude and distribution of vibration response.The study provides a theoretical basis for accurately solving the vibration characteristics of the cementing casing system and correctly designing the vibration cementing equipment parameters.
作者
王立琰
尹宜勇
齐林山
于永金
夏修建
胡原农
刘卫雄
WANG Liyan;YIN Yiyong;QI Linshan;YU Yongjin;XIA Xiujian;HU Yuannong;LIU Weixiong(School of Engineering,University of China Agricultural,Beijing 100083,China;CNPC Engineering Technology R&D Co.,Ltd.,Beijing 102206,China)
出处
《振动与冲击》
北大核心
2025年第10期180-190,共11页
Journal of Vibration and Shock
基金
国家自然科学基金资助项目(52175126)
中国石油科技创新基金资助项目(2022DQ02-0302,2019D-5007-0306)。
关键词
固井套管柱
分离变量法
模态叠加法
固有频率
振动响应
cementing casing string
separation of variables
modal superposition
natural frequency
vibration response
