Assessing the Potential of Depleted Gas Reservoirs to Create an Underground Hydrogen Storage

In this paper, the issues of creation of a UHS in depleted gas deposits are investigated. Such facilitiesare an alternative to aquifers for the creation of a underground hydrogen storage (UHS). Based on mathematical experiments, it is shown that the use of specialized wells for water injection also contributes to the creationof a compact hydrogen storage in a depleted gas reservoir. At the same time, the creation of a UHS in a depleted gas deposit requires less energy costs, but, if possible, the reverse extraction of hydrogen turns out to be less effective than the creation of a UHS in an aquifer. In addition, the use of an already existing well stock reduces costs,but increases the likelihood of technical problems in the creation and operation of the UHS.