Abstract: Energy storage caverns constructed in salt formations is one of the most widely adopted patterns in the world. To explore the feasibility of storage clusters in the Jintan deep salt mine, the geophysical explorations and research works have been performed on the regional geological and tectonic characteristics as well as the geological occurrence of the salt mine. The following conclusions have been obtained: 1) the sedimentary boundaries of Jintan salt basin are controlled by several faults. These faults, which are currently inactive, belong to the compressional faults, and have fairly gas tight character. 2) The salt mines mainly deposit in the fourth section of FuNing Group, Eocene Series. The salt layer and other layers are horizontally alternatively deposited. The salt layers are gradually wedging out in all directions. In the center area of salt basin, the thickness of salt is in range of 68231m with a good engineering property. The salt rock in this area has a great potential for the energy storage. (3) Both the overlying and the underling rock consist of mudstone, glauberite and other very low permeability rock formations. They have excellent gas tight property for the proposed storageclusters. In conclusion, the regional stability and tightness of Jintan salt basin are satisfactory and can be selected as the candidate site for energy storage clusters.

Key words: Gas storage Caverns, Regional Geological Tectonics, Rock Faults, Gas Tightness, Salt Rock Mass