Abstract: The experimental study shows that there is a non-linear relationship between permeability modulus and pressure drop in a large range of pressure variation. This paper presents the fractural permeability variation model and the variable permeability modulus pressure behavior model for dual porosity reservoir based on the experimental study results. The implicit finite difference method is used to discretize the formulation and the iterative method is used to resolve the above mentioned nonlinear equations. According to the calculations the sensitivities of each parameter in the model are analyzed.

Key words: permeability module, dual porosity, media, pressure behavior