Print Email Facebook Twitter Subsurface hydrogen storage controlled by small-scale rock heterogeneities Title Subsurface hydrogen storage controlled by small-scale rock heterogeneities Author Jangda, Zaid (Heriot-Watt University) Menke, Hannah (Heriot-Watt University) Busch, Andreas (Heriot-Watt University) Geiger, S. (TU Delft Applied Geology) Bultreys, Tom (Universiteit Gent) Singh, Kamaljit (Heriot-Watt University) Date 2024 Abstract Subsurface porous rocks hold significant hydrogen (H2) storage potential to support an H2-based energy future. Understanding H2 flow and trapping in subsurface rocks is crucial to reliably evaluate their storage efficiency. In this work, we perform cyclic H2 flow visualization experiments on a layered rock sample with varying pore and throat sizes. During drainage, H2 follows a path consisting of large pores and throats, through a low permeability rock layer, substantially reducing H2 storage capacity. Moreover, due to the rock heterogeneity and depending on the experimental flow strategy, imbibition unexpectedly results in higher H2 saturation compared to drainage. These results emphasize that small-scale rock heterogeneity, which is often unaccounted for in reservoir-scale models, plays a vital role in H2 displacement and trapping in subsurface porous media, with implications for efficient storage strategies. Subject Energy transitionHydrogen storagePore-scale 3D visualizationPorous media To reference this document use: http://resolver.tudelft.nl/uuid:af3a2e6a-2516-4e78-a4ec-0b293c459884 DOI https://doi.org/10.1016/j.ijhydene.2024.02.233 ISSN 0360-3199 Source International Journal of Hydrogen Energy, 60, 1192-1202 Part of collection Institutional Repository Document type journal article Rights © 2024 Zaid Jangda, Hannah Menke, Andreas Busch, S. Geiger, Tom Bultreys, Kamaljit Singh Files PDF 1-s2.0-S0360319924006578-main.pdf 7.86 MB Close viewer /islandora/object/uuid:af3a2e6a-2516-4e78-a4ec-0b293c459884/datastream/OBJ/view