Role of Hydrodynamic and Mineralogical Heterogeneities on Reactive Transport Processes

Abstract : Predicting reactive transport at large scale, i.e., Darcy- and field- scale, is still challenging considering the number of heterogeneities that may be present from nm- to pore-scale. It is well documented that conventional continuum-scale approaches oversimplify and/or ignore many important aspects of rock structure, chemical reactions, fluid displacement and transport, which, as a consequence, results in uncertainties when applied to field-scale operations. The changes in flow and reactive transport across the different spatial and temporal scales are of central concern in many geological applications such as groundwater systems, geo-energy, rock building heritage and geological storage... In this presentation, we will discuss some laboratory and numerical results on how local heterogeneities (structural, hydrodynamic and mineralogical) can affect the localization and the rate of the reaction processes. Different flow through laboratory experiments using various rock samples will be presented, from simple monomineral rocks such as limestone samples, and more complex rocks composed of different minerals with a large range of kinetic reactions. A new numerical approach based on multirate water mixing approach will be presented and applied to one of the laboratory experiment in order to analyze and distinguish the effect of the mineralogy distribution and the hydrodynamic heterogeneity on the total reaction rate.
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Communication dans un congrès
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https://hal.umontpellier.fr/hal-02100169
Contributeur : Pascale Roussel <>
Soumis le : lundi 15 avril 2019 - 16:00:10
Dernière modification le : mardi 28 mai 2019 - 13:48:10

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  • HAL Id : hal-02100169, version 1

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Linda Luquot, Maria Garcia-Rios, Joaquim Soler-Sagarra, Philippe Gouze, Laura Martinez-Perez, et al.. Role of Hydrodynamic and Mineralogical Heterogeneities on Reactive Transport Processes. AGU 2017 Fall meeting, Dec 2017, New Orleans, United States. ⟨hal-02100169⟩

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