Analysis method for rock salt underground gas storage limit operation pressure

The invention discloses an analysis method for rock salt underground gas storage limit operation pressure, and the method comprises the steps: judging mechanical parameters of rock salt, mud rock and an interlayer through the geological data and the condition of onsite exploration; employing different gas storage limit operation pressure discriminating standards for different conditions of a gas storage, and calculating the theoretical value of the gas storage limit operation pressure; carrying out the finite element simulation analysis of the theoretical value of the gas storage limit operation pressure through employing an improved Moore-Coulomb yield criteria, and obtaining a simulation value of the gas storage limit operation pressure; finally carrying out the optimization, and obtaining the limit value of an operation pressure. According to the invention, the method carries out the integrated concluding and analyzing of rock condition understanding, the gas storage limit operation pressure discriminating standards and the finite element simulation analysis, finally obtains the whole process of the rock salt underground gas storage limit operation pressure, can completely analyze a plurality of conditions of homogeneous rock salt and rock salt containing interlayers, and is suitable for wide application.