Device for simulating storage of supercritical carbon dioxide in stratified salt rock under dynamic pressure difference

The invention discloses a device for simulating storage of supercritical carbon dioxide in stratified salt rock under dynamic differential pressure, which comprises a differential pressure simulation tank and a stratified salt rock test assembly, and further comprises a first brine container, a water pump and a second brine container for recycling waste brine, the device further comprises a high-pressure gas tank used for storing carbon dioxide gas, a gas pump, a low-pressure gas tank used for storing carbon dioxide gas, a liquid medium storage tank, a liquid injection pump and a liquid medium recovery tank. The device can simulate a complex environment state that the layered rock salt test piece is soaked in brine, one side of the layered rock salt test piece bears pressure of the brine and supercritical carbon dioxide, the other side of the layered rock salt test piece bears stratum pressure, and the layered rock salt test piece is in a dynamic fluctuation pressure difference condition. And the change rule