Physical Models for Shale Gas Reservoir Considering Dissolved Gas in Kerogens

DOI: 10.14800/IOGR.423

Abstract

To figure out the complexity of the fabric and gas flow mechanism within the shale gas reservoirs shapes our preliminary study purpose. The pore structure and composition of shale are much more complicated than that of conventional and tight gas reservoirs. Apart from the classic matrix and fracture media, two new triple porous medium models regarding kerogen as the third medium were proposed in this paper. Furthermore, integrated gas flow mechanisms, including Darcy flow, slippage flow, transient flow, Knudsen diffusion, and Henry diffusion, within each model were illustrated. Overall, four types of gas flow models were presented and related gas flow patterns and flow principles were explicated.