Development of coupled fluid-flow/geomechanics model considering storage and transport mechanism in shale gas reservoirs with complex fracture morphology

• DOI: 10.1038/s41598-024-70086-2
• Publication Date: 2024-08-20T07:04:18Z
• Authors: Dongxu Zhang; Hongchao Wu; Fangfang Jiang; Zejin Shi; Chengxi Wu
• Keywords: Geomechanics; Effective stress; Poromechanics

Field observations frequently demonstrate stress fluctuations resulting from the reservoir depletion. The development of reservoirs, particularly completion infill wells and refracturing, can be significantly impacted by changes in around drainage areas. Previous studies mainly focus on plane fractures few consider influence complex transport storage mechanism irregular fracture geometry evolution shale gas reservoirs. Based embedded discrete model (EDFM) finite-volume method (FVM), a coupled geomechanics/fluid has been successfully developed considering adsorption, desorption, diffusion slippage gas. This achieves coupling simulation natural fractures, hydraulic with geometry, mechanism, stress, pore-elastic effect. open-source software OpenFOAM is used as main solver for this model. calculation productivity are verified classical poroelasticity problem results published research commercial simulator EDFM respectively. indicate that σ