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Digital Rock Physics: computation of hydrodynamic dispersion

Abstract : Hydrodynamic dispersion is a crucial mechanism for modelling contaminant transport in subsurface engineering and water resources management whose determination remains challenging. We use Digital Rock Physics (DRP) to evaluate the longitudinal dispersion of a sandpack. From a three-dimensional image of a porous sample obtained with X-ray microtomography, we use the method of volume averaging to assess the longitudinal dispersion. Our numerical implementation is open-source and relies on a modern scientific platform that allows for large computational domains and High-Performance Computing. We verify the robustness of our model using cases for which reference solutions exist and we show that the longitudinal dispersion of a sandpack scales as a power law of the Péclet number. The assessment methodology is generic and applies to any kind of rock samples.
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https://hal.archives-ouvertes.fr/hal-03275296
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Submitted on : Wednesday, June 30, 2021 - 10:33:24 PM
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Cyprien Soulaine, Laurence Girolami, Laurent Arbaret, Sophie Roman. Digital Rock Physics: computation of hydrodynamic dispersion. Oil & Gas Science and Technology - Revue d'IFP Energies nouvelles, Institut Français du Pétrole, 2021, 76, pp.51. ⟨10.2516/ogst/2021032⟩. ⟨hal-03275296⟩

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