In this work, it is presented a locally conservative multiscale algorithm accounting the mineralization process during the supercritical carbon dioxide injection into a deep saline aquifer. The purpose of this study is to address numerically the geological storage of CO2 in a highly heterogeneous reservoir, leading with interactions among several phenomena in multiple scales.
This algorithm have features that distinguish it from the presently available solvers which are: (i) an appropriate combination of a coupled transport system solver using a high-order non-oscillatory central-scheme finite volume method and, elliptic numerical approach applying a locally conservative finite element method for Darcy’s law and, (ii) the capability of leading with interactions among several phenomena in multiple scales.
As a result, this approach was able to quantify the precipitation of the carbonate crystals at the solid interface.
The author strongly recommends the extension of the algorithm coupling the formulation with a poromechanical model, considering that the porous medium is subjected to external loading, thus studying the total stresses applied to the solid-fluid mixture. Additionally, the consideration of the diffusive term in the mass balance of CO2 in the aqueous phase would be enriching. Lastly, a further investigation onto mineralization is needed, in which an adaptation of more accurate mineralization models to estimated Td and Tr would be made.
Rodrigues Sica, L.U. (2020), "A multiscale algorithm for the mineralization process during supercritical carbon dioxide injection into a deep saline aquifer", International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 30 No. 6, pp. 3101-3120. https://doi.org/10.1108/HFF-09-2018-0494
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