Toward a Fundamental Understanding of Geological Hydrogen Storage

Geological H2 storage plays a central role to enable the successful transition to the renewable H2 economy and achieve net-zero emission in the atmosphere. Depleted oil and gas reservoirs are already explored with extensive reservoir and operational data. However, residual hydrocarbons can mix with injected H2 in the reservoirs. Furthermore, low density and high diffusivity of H2 may establish H2 leakage from the reservoirs via fault pathways. Interestingly, H2 can be consumed by microorganisms, which results in pore-network precipitation, plugging, and partial permeability impairment. Therefore, stored H2 may be lost in the formations if the storage scenario is not planned cautiously. While salt caverns are…

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  Curtin University of Technology