Multi-interlayer rock salt geological condition simulated cavity construction model test device

Abstract

The invention discloses a multi-interlayer rock salt geological condition simulated cavity construction model test device, which comprises a round barrel, an annular heating cushion, cavity construction intermediate casings, a pressure plate, a temperature controller, an ultrasonic energy exchanger and a data processor. The outer periphery of the annular heating cushion is attached to the inner wall of the round barrel, the annular heating cushion is controlled by the temperature controller, the pressure plate is arranged at the top of the round barrel, a transmitting probe and a receiving probe on the ultrasonic energy exchanger are abreast placed on the outer wall of the round barrel, a signal output end of the ultrasonic energy exchanger is connected with the data processor, and the bottoms of the cavity construction intermediate casings penetrate through the pressure plate and extend into a cavity of an interlayer rock salt test piece. Using the device for a cavity construction simulated test of the interlayer rock salt test piece can guarantee similar model tests of geological environments and salt bed occurrence conditions, and the cavity construction process of multi-interlayer rock salt can be better observed and analyzed to provide more real theoretical support and technical guidance for avoidance of cavity construction failure and design of cavity reconstruction technological parameters.

Description

technical field [0001] The invention relates to a rock-salt cavity-making test device, in particular to a cavity-making model test device for simulating geological conditions of multi-interlayer salt rocks. Background technique [0002] Compared with other storage methods, rock salt underground oil and gas storage is safe and economical. However, accidents (such as oil and gas leakage, dissolution cavity failure, surface subsidence, etc.) still occur in overseas rock salt underground storage. At present, almost all underground rock salt storages in foreign countries are built in huge salt domes, while the rock salt that can be built in my country is layered rock salt, which has the characteristics of thin thickness, many interlayers, low grade, and large buried depth (Jintan salt rock layer in Jiangsu Province The burial depth is about 1000m), in contrast, the construction of underground rock salt storage in my country is more difficult and the operation risk is higher. At p...

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Problems solved by technology

[0004] The existing test devices have the following deficiencies: 1. The cost of core drilling is high and the size effect is serious, which cannot reflect the cavity formation in salt rock; 2. The cavity formation process with interlayers cannot be realized; 3. The geological conditions cannot be simulated

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