Pore Scale Numerical Modelling of Geological Carbon Storage Through Mineral Trapping Using True Pore Geometries

Abstract Mineral trapping (MT)is the most secure method of sequestering carbon for geologically significant periods time. The processes behind MT fundamentally occur at pore scale, therefore understanding which factors control this scale is crucial. We present a finite elements advection–diffusion–reaction numerical model uses true geometry domains generated from $$\upmu$$ μ CT imaging. Using model, we investigate impact features such as branching, tortuosity and throat radii on distribution occurrence carbonate precipitation in different networks over 2000 year simulated periods. find evidence that greater tortuosity, degree branching network narrower throats are detrimental to contribute risk clogging reduction connected porosity. suggest less than 2 critical promoting per unit volume should be considered alongside porosity permeability when assessing reservoirs geological storage (GCS). also show dominant influence precipitated mass Damköhler number, or reaction rate, rather availability reactive minerals, suggesting focus engineering effective subsurface long term security. Article Highlights rate has stronger mineral amount available reactant. In fully preferential flow pathways still form results uneven precipitate distribution. A <2 recommended facilitate mineralisation.