The safety study of a CO2 storage site requires the evaluation of the sustainable injection pressure. The faults are generally considered as one of the potential leakage paths as a fault zone could be more permeable than the neighbouring rock matrix. The pressure build up in the reservoir due to the injection procedure changes the stress field within the reservoir and its surrounding rocks. The decrease of effective stress in the vicinity of a fault, due to this pore pressure increase, may lead to fault failure, increasing its permeability or even creating induced seismicity. The aim of this study is to carry out large-scale 2D coupled hydromechanical simulations of the fault behaviour during and after the injection and to study the sensibility of the fault response regarding to some parameters. (C) 2011 Published by Elsevier Ltd.
- CO2 geological storage
- hydromechanical modelling
- fault modelling
- induced seismicity
- CO2 leakage
[Ducellier, Ariane; Seyedi, Darius; Foerster, Evelyne] Bur Rech Geol & Minieres, Nat Risks & Storage Safety Div CO2, F-45060 Orleans 2, France
Ducellier, A (reprint author), Bur Rech Geol & Minieres, Nat Risks & Storage Safety Div CO2, 3 Av C Guillemin,BP 36009, F-45060 Orleans 2, France.