Digital Rock Physics: computation of hydrodynamic dispersion

Digital Rock Physics: computation of hydrodynamic dispersion

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...

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Veröffentlicht in:Oil & gas science and technology 2021, Vol.76, p.51
Hauptverfasser: Soulaine, Cyprien, Girolami, Laurence, Arbaret, Laurent, Roman, Sophie
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creator Soulaine, Cyprien
Girolami, Laurence
Arbaret, Laurent
Roman, Sophie
description 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.
doi_str_mv 10.2516/ogst/2021032
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title Digital Rock Physics: computation of hydrodynamic dispersion
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