Mohamed F. El-Amin Mohamed F. El-Amin Relative Permeability Modeling for Underground Hydrogen Storage: A Comparative Analysis of Hysteresis Effects
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2025-01-15
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Abstract
The transition towards a sustainable and low-carbon future introduces the necessity to develop efficient energy storage systems. H2, with its high energy density and environmental benignity, emerges as a pivotal element in this energy transition. Nevertheless, the efficient storage of H2 is impeded by substantial obstacles, which requires the development of innovative solutions. Underground H2 storage (UHS) in depleted hydrocarbon reservoirs is a promising solution for large-scale H2 energy management that is essential for the transition to an H2 economy. This paper investigates the mathematical modeling and curve fitting of experimental measured relative permeability hysteresis data for H2 and water during drainage, imbibition processes on reservoir-scale performance. This study evaluates the performance of several relative permeability models—Brooks-Corey (BC), Van Genuchten (VG), and Modified Brooks-Corey-variable Corey (BC-vC)—using experimental data for H2 and water during drainage and imbibition processes. Error metrics, including Mean Squared Error (MSE), Mean Absolute Percentage Error (MAPE), and the coefficient of determination (R2), are calculated to assess model accuracy. The results indicate that the VG model provides the best fit for H2 during drainage, while all models perform comparably for water drainage. The VG model is a more suitable option for H2 in terms of imbibition. The study underscores the importance of model selection in accurately describing multiphase flow in porous media.