Research on the Dynamic Apparent Permeability of Shale: Coupling Anisotropic Deformation Characteristics and Multiple Transport Mechanisms.

As shale gas is an unconventional energy source, it is believed to be essential for achieving green resource development and improving the energy supply-demand balance. However, owing to shale's substantial anisotropic properties and various microstructures, its gas flow characteristics and transport mechanisms are exceedingly complex. Therefore, accurately predicting gas permeability evolution in shale pores was considered to be important for energy development.

An Apparent Permeability Model in Organic Shales: Coupling Multiple Flow Mechanisms and Factors.

It is of great significance to study shale apparent permeability under the action of multiple flow mechanisms and factors because shale reservoirs possess complex pore structures and flow mechanisms. In this study, the confinement effect was considered, with the thermodynamic properties of gas being modified, and the law relating to the conservation of energy adopted to characterize bulk gas transport velocity. On this basis, the dynamic change of pore size was assessed, from which shale apparent permeability model was derived.