A mathematical model for the shape prediction of bedded salt cavern used for energy storage

The vertical layering and anisotropic characteristics of bedded rock salt are different from those of salt mounds, and the brine reinjection operation during the cavern creation process makes it difficult to predict the distribution of brine concentration in the cavern. The accumulation of slag in the complex cavern affects the brine flow characteristics and cavern volume, which makes the water-soluble cavern formation in bedded rock salt deviate from the expected design. In this paper, we propose the control scheme and required technology for cavern construction system in bedded rock salt, establish the prediction theory of brine cavern concentration and flow rate considering the cavern morphology and brine injection and drainage scheme, establish the prediction theory of dissolution morphology and insoluble matter morphology considering the difference of mineral components, and complete the coupled solution of the flow field, concentration field, morphology expansion, and insoluble matter morphology prediction, and give an example of software platform development with parameter input and graphic display function. A software platform development example with parameter input and graphic display functions is provided to facilitate engineers’ use. After the function test and the calculation of the cavern creation example, this paper can improve the stability of the control of cavern creation in bedded rock salt.