Finite element analysis of deformation mechanism for porous materials under fluid–solid interaction

Deformation of underground rocks, also named rock creep, is treated as porous materials which usually results in many engineering problems, especially in petroleum engineering. However, it can be controlled by fluid–solid interaction in porous materials, and the deformation mechanism of underground rocks with fluid–solid interaction was analysed by finite element computing method. Specifically, an Iterative computing method and a computational procedure of two-way fluid–solid coupling are used to simulate deformation process until the fluid and solid solution variables are fully coupled. A typical application example was taken in Jinzhou oil production plant of Liaohe Oil Field Company, and a finite element model is built by combined application of parasolid and native modelling methods. According to the calculation results, deformation mechanism of underground rocks is proposed, and some advice is also presented.