Enhancing Energy Supply Security Through Green Hydrogen Integration: The Role of Depleted Gas Reservoirs in Serbia

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🔬研究者:Provides quantitative screening criteria and comparative analysis of H2, CH4, and CO2 storage in porous media.

🏢実務担当者:Offers a replicable assessment framework for evaluating depleted reservoirs for hydrogen and CCS projects.

🏛政策担当者:Highlights the strategic role of subsurface storage in national energy transition and security planning.

Serbia’s energy sector is undergoing structural transformation driven by European climate policies, market volatility, and the need for long-term energy security. In this context, geological storage of energy carriers represents a strategically important option. Depleted gas reservoirs, particularly within the Pannonian Basin, constitute a technically validated subsurface infrastructure suitable for repurposing as multifunctional storage systems for natural gas, CO2, and green hydrogen. This study analyzes trends in European and Serbian natural gas markets, EU decarbonization targets, and Serbia’s energy balance to assess the feasibility of carbon capture and storage (CCS) and underground hydrogen storage. Key geological parameters governing long-term containment—lithology, effective porosity, permeability, caprock integrity, and structural stability—are evaluated, with emphasis on reservoirs combining favorable properties and proximity to existing infrastructure. Quantitative screening based on reservoir depth (approximately 1000–2500 m), effective porosity (15–25%), permeability (typically >50 mD), verified caprock integrity, and estimated geological storage capacities ranging from 0.17 to 1.25 billion m3 demonstrates that several depleted gas reservoirs in Serbia meet explicit fit-for-purpose criteria for underground storage applications. A comparative analysis of the physical and molecular behavior of H2, CH4, and CO2 in porous media indicates that hydrogen storage is the most sensitive to reservoir integrity. The reported results provide quantitative and qualitative evidence that selected depleted gas reservoirs in Serbia satisfy essential requirements for project-level screening, including reservoir capacity, petrophysical suitability, caprock integrity, and infrastructure accessibility. These findings support the technical readiness of such reservoirs for staged deployment of natural gas storage, CO2 sequestration, and underground hydrogen storage in the post-2035 energy system. Overall, combined subsurface storage of natural gas, CO2, and hydrogen in Serbia is technically feasible, economically justified, and strategically relevant within the national energy transition framework.

• semanticscholar https://doi.org/10.3390/en19030782first seen 2026-05-15 19:24:44