SPE Annual Technical Conference and Exhibition, Journal Year: 2024, Volume and Issue: 70

Published: Sept. 20, 2024

Abstract Underground Hydrogen Storage (UHS) in porous media represents a promising solution for long-term, large-scale energy storage. Despite its potential, UHS development faces challenges such as low storage efficiencies and potential geochemical reactions between hydrogen reservoir rocks. This study investigates the behavior interactions of carbonate rocks, specifically limestones, under conditions UHS, focusing on both geomechanical changes induced by exposure. Static reactivity tests were conducted various limestone samples at constant pressure 500 psi, exposed to different temperature (25°C 50°C) brine over 30 days. Both dry saturated states tested simulate diverse conditions. Parameters porosity, permeability, Uniaxial Compressive Strength (UCS) measured before after Results showed that porosity remained stable across all conditions, suggesting exposure does not significantly alter pore structure. However, permeability exhibited mixed responses, with increases observed two out three types, indicating could enhance fluid flow certain All elevated temperatures saturation demonstrated reduction UCS, weakening mechanical integrity, which impact structural stability safety operations. The extent varied among mineralogical composition plays crucial role rock response These findings provide critical insights into rocks While reservoirs appears feasible, significant UCS highlights risks stability. Understanding these is essential assessing feasibility projects reservoirs. Future research should focus long-term mitigation strategies address

Language: Английский