Upscaling Strategies of Porosity-Permeability Correlations in Reacting Environments from Pore-Scale Simulations

Author:

Prasianakis Nikolaos I.1ORCID,Gatschet Michael12,Abbasi Aida1,Churakov Sergey V.12

Affiliation:

1. Laboratory for Waste Management LES, Nuclear Energy and Safety Department, Paul Scherrer Institute, 5232 Villigen, Switzerland

2. Institute of Geological Sciences, University of Bern, 3012 Bern, Switzerland

Abstract

In geochemically reacting environments, the mineral dissolution and precipitation alters the structural and transport properties of the media of interest. The chemical and structural heterogeneities of the porous media affect the temporal evolution of the permeability with respect to porosity. Such correlations follow a nonlinear trend, which is difficult to estimate a priori and without knowledge of the microstructure itself, especially under the presence of strong chemical gradients. Macroscopic field-scale codes require such an input, and in the absence of exact descriptions, simplified correlations are used. After highlighting the diversity of microstructural evolution paths, due to dissolution, we discuss possible upscaling strategies.

Funder

Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung

Publisher

Hindawi Limited

Subject

General Earth and Planetary Sciences

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