SEISMIC RESPONSE ANALYSIS OF OIL WELL CASING CONSIDERING SOIL COUPLING EFFECT
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.
oil well casing structureseismic dynamic responsenonlinear time history analysis
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