Theory Of Fluid Transportation And Configuration Development In Solution Mining Cavern For Underground Gas Storage

Theory of fluid transportation and configuration development in solution mined cavern were studied in this thesis. The main works of this thesis include:1. According to theory of fluid and chemical kinetics and material equilibrium, mechanism of fluid transportation were analyzed and a model for halite dissolution was given. Shape of solution mined cavern was affected by interaction of consistence and flow field. Characteristic of fluid transportation was different in various regions of solution mined cavern. Rate of dissolution and production were balanced by fluid transportation.2. Mathematical model for fluid transportation and solution mining cavern was set up. Equations of dissolution Rate and of moving border for solution mined cavern were derived. The mechanical feature of interlining was discussed and its mechanics model was given by theory of elastic mechanics to describe its influence to the development of solution mined cavern.3. The numerical solution to the mathematical model and its computing program were given to simulate development of solutionmined cavern.4. The model was tested and verified by experiment. Some affecting factors were discussed for the model.5. Principle and method were given for optimizing designing of solution mined cavern. The principle could be expressed by dissolving upward gradationally to ensure the continuity of the border of solution mined cavern considering of its security and stability. Then determining the overall structure of the solution mined cavern to optimize the technology parameter by downward designing method.Solution mined cavern has been designed in both homogeneous halite stratum and non-homogeneous halite stratum with interlining by numerical simulation method. It has been indicated that the numerical simulating result and the designing cavern were in good agreement for solution mining with the reasonable technology parameter.The paper provided an academic basis for designing solution mined cavern and took an important role in building underground gas storage in salt stratum.