Finite Element Analysis Of Porous Media On Thermal Fluid-structural Interaction

Porous media fluid flow problems exist in many engineering problems, such as ground subsidence, reservoir-induced earthquakes, dam stability, coal seam gas seepage, etc. They are also widely distributed in the oil industry, such as the injection and production in the process of reservoir flow, wall stability, oil wells and casing damage, producing layers of sand, hydraulic fracturing, formation instability, etc.Two-way interaction coupling calculation method, the two kinds of finite element models of thermal fluid-structural interaction and other content are analysised on the basis of recalling the theory of porous media on thermal fluid-structural interaction. The modeling process and methods of porous media on thermal fluid-structural interaction are discussed using finite element analysis software ADINA. The article uses finite element analysis software ADINA for porous media on thermal fluid-structural interaction to numerical simulation, and analyses the impact of the reservoir due to steam injection and fluid flow in the process of thermal oil. There exists structural model and fluid model, when we establish three-dimensional finite element model using ADINA. Soil is established by parasolid in structural model, intermediate formation uses porous, the remaining two use Isotropic linear elastic material that are sandstone, shale and other rock materials. The load should consider gravity load and external load. Soil and fluid models were also established by parasolid in fluid model. The difference between structural model and fluid model is fluid around the middle stratum and the well-head. The load should consider fluid pressure load and temperature load.Through analysis of porous material, fluid pressure, temperature and external load, it is concluded that, firstly, the influence of external load on the formation of porous media is the largest, therefore, the choosing of the oil exploration site should try to avoid areas of geological instability; secondly, temperature and permeability of porous has more influence on the flow of fluid, so we can achieve the purpose of increasing production through adjusting the temperature and selecting the appropriate exploitation of the region.