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Abstract Salt rocks are layering distributed containing multiple interlayers and with big difference in burial depths across China. The shape control of salt cavern is critical for its stability and safe operation. A testing device for salt cavern simulation and morphology control was developed for determining the optimal construction process and the control parameters of morphology of the salt cavern in laboratory. The test device was designed according to the similarity principles. It is composed of a reaction framework，a coupled multi-field system，an injection cycle system，a dynamic parameter measurement and control system of the injection cycle and a system for salt cavern shape measuring，etc. The reaction framework is the modularized main structure. The coupled multi-field system can simulate the ground temperature and stress fields. The injection cycle system can simulate the injection of water and the control of oil pad. The dynamic parameter measurement and control system of injection cycle can achieve a good control of the pipe heights inside and outside and the height and angle of the probes. The system for salt cavern shape measuring can provide a video-visualization and a real-time shape measurement in the construction process of salt caverns. The device was tested on the constructions of caverns of different sizes inside the salt samples and was confirmed to be capable of providing the visual simulation of the cavern construction and the shape evolution of the embedded salt rock under the condition of the coupled multi-fields with different construction technologies and parameters.
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2014, Vol. 33 
