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Theses

Couplage réactions-transport pour la modélisation et la simulation du stockage géologique de CO2

Abstract : In this work, we present some results about the coupling between transport and geochemistry for the modelling and the simulation of co2 geological storage.
We present a multiphase flow model and a geochemical model which enables to describe a coupled reactive multiphase flow problem.
We then propose two methods of resolution, the first one is a global method, the other one is a splitting method which is used at the IFP in the software COORES. The splitting is based on physical assumptions. The coupling method used is a non iterative method, in which the splitting error is corrected by adding a penalisation term. A convergence study shows that this scheme converges to the same solution as the global scheme.
A part of this PhD is dedicated to diffusion and dispersion phenomena. We are interested in this term because it can't be integrated easily in a splitting scheme, if the reactive transport is solved locally (which is necessary to use local time-step). After having highlighted the importance of this term on a representative test case, we show some difficulties encountered to integrate it in a splitting scheme.
Finally, we study a miscible multiphase flow problem in 1D from a mathematical point of view. The difficulties arise with the non linearity due to the non zero gas solubility in water. We propose a definition for the weak solution of this problem and its existence is shown thanks to the convergence of a finite volume scheme.
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https://tel.archives-ouvertes.fr/tel-00206055
Contributor : Elodie Tillier <>
Submitted on : Wednesday, January 16, 2008 - 2:23:19 PM
Last modification on : Thursday, March 19, 2020 - 12:26:02 PM
Long-term archiving on: : Tuesday, April 13, 2010 - 5:03:28 PM

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  • HAL Id : tel-00206055, version 1

Citation

Elodie Tillier. Couplage réactions-transport pour la modélisation et la simulation du stockage géologique de CO2. Mathématiques [math]. Université de Marne la Vallée, 2007. Français. ⟨tel-00206055⟩

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