Natural gas storage plays a vital role in maintaining the reliability of supply needed to meet the demands of consumers. Under such circumstances, the TAP Project envisages gas cavern storage possibilities in Albania, in salt domes.

Underground salt formations offer an option for natural gas storage. These formations are well-suited to natural gas storage because salt caverns, once formed, allow only little injected natural gas to escape from the formation unless specifically extracted. The walls of a salt cavern also have the structural strength of steel, thus helping protect the cavern from shocks.

Salt domes are thick formations created from natural salt deposits that, over time, leach up through overlying sedimentary layers to form large dome-type structures. They can be as large as 1500 m in diameter, and 9000 meter in height. Typically, salt domes used for natural gas storage are between 2000 and 500 meter below the earth, although in certain circumstances they can come much closer to the surface.