考虑土体耦合作用的油井套管地震响应分析  

SEISMIC RESPONSE ANALYSIS OF OIL WELL CASING CONSIDERING SOIL COUPLING EFFECT

作　　者：刘汉辰 刘洋 何锦涛 范琳琳 吴浩然 LIU Hanchen;LIU Yang;HE Jintao;FAN Linlin;WU Haoran(School of Urban Planning and Municipal Engineering,Xi'an Polytechnic University,Xi'an 710048,China)

机构地区：[1]西安工程大学城市规划与市政工程学院,西安710048

出　　处：《低温建筑技术》2024年第1期28-32,共5页Low Temperature Architecture Technology

基　　金：陕西省重点研发计划项目(2022SF-085);陕西省油气井及储层渗流与岩石力学重点实验室开放基金项目(WSFRM20200102001)。

摘　　要：为研究油井套管的地震响应,文中以某油井工程为背景,依据欧拉伯努利弹性地基梁建立了考虑土体耦合作用的套管横向振动模型。采用有限元软件Midas/GTS建立了油井套管-土体动力相互作用的数值模型。通过非线性时程分析,得到油井套管在汶川地震波、Kobe地震波、Northridge地震波、人工地震波、El-Centro地震波下的位移、加速度响应。结果表明在地震作用下,油井套管的位移、加速度响应随着埋深的增加而减弱;与地面构筑物相比较,油井套管对地震波的响应有抑制作用;油井套管应力最大的位置出现在地面0m处和露出地面部分,并且这个位置是套管结构的最不利位置。研究结论可为地震区油井套管的抗震设计提供参考。Taking an oil well project as the case,a lateral vibration model of dynamic interaction of casing-soil cou⁃pling is established by Midas/GTS based on Euler Bernoulli elastic foundation beam to study the seismic response of oil well casing.Through nonlinear time history analysis,we obtain the displacement and acceleration responses of oil well casing under Wenchuan seismic wave,Kobe seismic wave,Northridge seismic wave,artificial seismic wave and El-Centro seismic wave.The results show that under the action of earthquake,the displacement and acceleration re⁃sponse of oil well casing decreases with the increase of buried depth.Compared with the ground structure,the oil well casing has an inhibitory effect on the response of seismic waves;the position of the maximum stress of the oil well cas⁃ing appears at the ground 0 m and the exposed ground part,and this position is the most unfavorable position of the casing structure.The conclusions may provide the reference for the seismic design of oil well casing in seismic zone.

关 键 词：油井套管结构 地震动力响应 非线性时程分析 

分 类 号：TU311.3[建筑科学—结构工程]