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Numerical modeling of salt and gypsum dissolution: test case and comparison

Laouafa, Farid and Guo, Jianwei and Quintard, Michel Numerical modeling of salt and gypsum dissolution: test case and comparison. (2018) In: Mechanical behavior of SALT IX, 12 September 2018 - 14 September 2018 (Hannover, Germany).

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Abstract

This paper deals with the dissolution of certain soluble rocks such as salt and gypsum, and the geomechanical consequences like subsidence, sinkholes, underground collapses. It focuses on salt and gypsum, although the developed method can be used for any soluble rock. In this paper, a large-scale Diffuse Interface Model (DIM) is used to describe the evolution of a salt cavity formed by dissolution. The method is based upon the assumption of a pseudo-component dissolving with a thermodynamic equilibrium boundary condition. The purpose of this article is to provide a review the method we have developed and more specifically to present its possibilities. The problems considered are isothermal even if the temperature field could be easily integrated into the global physical problem. The potential of the proposed methodology is illustrated on one meso-scale (in-situ) configuration corresponding to salt cavity dissolution. Comparison between in-situ experiment data and numerical modeling shows the method is a good prediction tool. A final boundary value problem is also studied in which salt is replaced by gypsum to show the applicability of the proposed methodology to analyze rocks with different solubility.

Item Type:Conference or Workshop Item (Paper)
Additional Information:Thanks to Federal Institute for Geosciences and Natural Resources (BGR). BRG reserves the copyrights of the papers published in the Proceedings of the SaltMech IX.
Audience (conference):International conference proceedings
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
French research institutions > Institut National de l'Environnement Industriel et des Risques - INERIS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Southwest Jiaotong University - SWJTU (CHINA)
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Deposited On:25 Jan 2019 10:51

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