Hydrogen Storage in Depleted Gas Fields – First Insights from Conceptual Reservoir Modelling

H₂ storage in gas fields is a relatively underexplored topic of research. This study gives first insights on the reservoir dynamics, which are different from underground natural gas storage reservoirs, due to the different fluid properties of hydrogen and the risk of methane breakthrough (or any other gas present in the reservoir). Based on this, a new definition of WV:CV is proposed. Which reservoir characteristics are (more) relevant for the WV:CV (than others) is explored in part 1 of this study.

To get a generic idea on future application of hydrogen storage in gas reservoirs, first insights on future hydrogen storage demand are used to define a set of requirements for a hydrogen storage reservoir (or: a set of reservoirs), which includes the period and frequency of send-in and send-out. This was used for part 2 of this study, which explores the longer term effects in reservoir dynamics by simulating multiple cycles of pre-defined periods based on the required storage demand.