Numerical Simulation of Stratum Deformation Based on Fluid-structure Interaction
Stratum deformation is one of the major reasons to cause casing damage in petroleum exploitation,and some exploitation methods such as the high-pressure water injection oil recovery promotes the deformation of strata significantly.In this paper,the finite element software ADINA is used to establish a seven-points well fluid-structure interaction numerical simulation model in the light of the deformation of strata which results from high-pressure water injection oil recovery in petroleum engineering,and the process of stratum deformation in high-pressure injection is described in detail,then the calculation results are studied and analyzed.The results show that the high-pressure water injection is apt to make the wellbore formation stress concentrated,and make the rock sliding,expanding and the stratum sunken and so on.In addition,the increment of pore pressure and fluid flow velocity in low porosity reservoirs are more than that in large porosity ones.The above conclusions provide theoretical basis for preventing and reducing the influence caused by stratum deformation in fluid-structure interaction.
high pressure water injectionfluid-structure interactionstratum deformationADINA
NETL
NSTL
万方数据
维普
