Title
A coupled geochemical-transport-geomechanical model to address caprock integrity during long-term CO2 storage
Author
van der Veer, E.F.
Waldmann, S.
Fokker, P.A.
Publication year
2015
Abstract
Underground storage of CO2 will lead to chemical fluid-rock interactions which may potentially alter the porosity and the flow patterns in faults. In this study, we present a coupled numerical model combining chemical fluid-rock interactions, aqueous diffusion, fluid flow, and mechanical processes, aiming at a better understanding of mineral reactions leading to changes of the rock properties, the associated flow patterns and the mechanical stability of faulted caprock on the long-term (500 yrs). In the examples that we studied the mechanical stability of the caprock system was not affected, but significant porosity changes were predicted for low-consolidated fault gouges. Coupled chemical-flow modelling is preferred over chemical modelling as this showed significantly higher porosity increases. Copyright 2015 ARMA, American Rock Mechanics Association.
Subject
Geo
PG - Petroleum Geosciences
ELSS - Earth, Life and Social Sciences
Geo Energy
Geosciences
Energy
Carbon dioxide
Chemical stability
Chemical modelling
Fluid-rock interaction
Geochemical transport
Geomechanical model
Mechanical process
Underground storage
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http://resolver.tudelft.nl/uuid:804f49d4-5c5c-4d9c-91e7-efa50072dc6c
TNO identifier
535435
Publisher
American Rock Mechanics Association (ARMA)
ISBN
9781510810518
Source
49th US Rock Mechanics / Geomechanics Symposium 2015 Vol 4, 2458-2468
Document type
conference paper