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Stress from NaCl crystallisation by carbon dioxide injection in aquifers

Abstract : The goal of this paper is to identify the mechanical impact of water evaporation and salt crystallisation during supercritical carbon dioxide injection (drying-out process) in aquifer rocks. The precipitation of salt and the resulting crystallisation pressure are inferred from the chemical equilibrium of the carbon dioxide-rich gas phase, the in-pore brine and the crystal. The induced rock strain and equivalent tensile stress are then estimated within the framework of isotropic linear poroelasticity. A one-dimensional numerical simulation is conducted to illustrate the ability of the model to estimate the poromechanical behaviour of a structure submitted to a constant flow of nearly dry supercritical carbon dioxide.
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https://hal-brgm.archives-ouvertes.fr/hal-03699281
Contributeur : Frédérique COUFFIGNAL Connectez-vous pour contacter le contributeur
Soumis le : lundi 20 juin 2022 - 10:48:47
Dernière modification le : mercredi 9 novembre 2022 - 03:47:51

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Florian Osselin, Antonin Fabbri, Teddy Fen-Chong, Patrick Dangla, Jean-Michel Pereira, et al.. Stress from NaCl crystallisation by carbon dioxide injection in aquifers. Environmental Geotechnics, 2015, 2 (5), pp.280-291. ⟨10.1680/envgeo.13.00057⟩. ⟨hal-03699281⟩

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