A dual porosity poroelastic model for simulation of gas flow in saturated claystone as a potential host rock for deep geological repositories

• Published in: Tunnelling and underground space technology Vol. 115; p. 104049
• Main Authors: Yang, Jianxiong, Fall, Mamadou
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.09.2021; Elsevier BV
• Subjects: Coupling; Deep geological repository; Dilatant gas pathway; Fractures; Gas flow; Gas injection; Gas migration; Gas transport; Geology; Host rock; Hydro-mechanical processes; Mechanical properties; Nuclear waste; Porosity; Porous materials; Porous media; Radioactive waste disposal; Radioactive wastes; Repositories; Safety; Simulation; Gas migration; Deep geological repository; Dilatant gas pathway; Hydro-mechanical processes; Host rock; Nuclear waste

•Claystone is a potential host rock for radioactive waste disposal.•Gas migration in host rocks can jeopardize the safety of a repository.•A fully coupled HM model is developed to simulate the gas transport in claystone.•Main experimental behaviors are well captured by the HM model.•Dilation/compres...