Abstract:To simulate the permeability and coupling characteristics of pores and fractures in intack rock,an iterative computation model for the analysis of coupled fluid flow and stress is established based on the dual porosity media model. The permeability coefficient and porosity of rock are updated by volumetric strain. The coupling model of fracture system is established by cubic element model;and the permeability coefficient and porosity are renewed as effective stress changes. Considering enormous time steps and huge workload in the coupling analysis,the element-by-element(EBE) finite element parallel computation method is adopted for numerical simulation. Corresponding parallel program for coupling analysis,GoupledGF,is developed and then implemented on cluster of workstation. Coupling analysis of fluid flow and stress is conducted for an enclosed area including a production well and an injection well. The total amount of time steps is about 22 000. Computational results show that the parallel coupling analysis model is very effective for the coupling analysis.