Speaker
Description
Large-scale energy storage achieved by underground hydrogen storage (UHS), e.g. in caverns or porous media, will likely play an important role in the low-carbon future. Especially for hydrogen storage in porous media, geological heterogeneities, such as in fluvial depositional environments, can influence UHS operations. In reservoirs with large-scale heterogeneities, hydrogen flow paths, plume shape and gas-saturation distribution can be impacted – all key factors, which affect UHS performance. In this UHS study, we examine the flow behaviour of hydrogen in fluvial depositional environments. Realistic fluvial reservoir systems are generated with a process-based tool FLUMY [1], where different characteristics such as the channel depth, width, and net-to-gross ratio, are varied to create an ensemble of geological realisations.
The numerical simulations of cyclical injection and production of hydrogen in these geological models is carried out using the multiphase flow simulator TOUGH3 [2]. We evaluate the impact of fluvial heterogeneities on UHS in terms of operational efficiency, hydrogen losses due to trapping with and without hysteresis and unwanted brine production. Results are presented for various geological configurations to highlight their implications for UHS design and optimization.
| References | [1] FLUMY™, Process based channelized reservoir models, Copyright © MINES PARIS PSL / ARMINES, https://flumy.minesparis.psl.eu [2] Jung, Y., G. Pau, S. Finsterle, C. Doughty, TOUGH3 User’s Guide, Version 1.0, Report LBNL-2001093, Lawrence Berkeley National Laboratory, Berkeley, Calif., January 2018. |
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| Country | Germany |
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