Stability evaluation and failure analysis of rock salt gas storage caverns based on deformation reinforcement theory

Uniaxial compression creep tests have been performed on a kind of rock salt similar material and laminated salt rock similar material on the base of salt rock gas-storage in Jintan. The creep tests show that the rheological property of the similar material is basically the same with the original rock. Under the uniaxial compression, the deformation gradually approaches to be constant after the early short stage of creep attenuation. The similar material shows stress-dependent behavior obviously under different stress stage, the greater the load the higher the creep ratio and creep deformation. A creep constitutive equation which is suitable to rock salt is used to the similar material, and it fits with the obtained creep data very well. The results show that the similar material developed in this passage has the same creep property as the original salt rock,and this material can be used to simulated the deformation and failure of underground gas storage constructed in bedded salt deposits.

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Experimental study on repair characteristics of damaged rock salt of underground gas storage

Journal of Central South University ◽

10.1007/s11771-019-4165-9 ◽

2019 ◽

Vol 26 (8) ◽

pp. 2185-2196 ◽

Cited By ~ 3

Author(s):

Hong-wu Yin ◽

Hong-ling Ma ◽

Xi-lin Shi ◽

Hao-ran Li ◽

Xin-bo Ge ◽

...

Keyword(s):

Experimental Study ◽

Rock Salt ◽

Gas Storage ◽

Underground Gas Storage

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Potential capacity of gas storage caverns in rock salt bedded deposits in Poland

Journal of Natural Gas Science and Engineering ◽

10.1016/j.jngse.2017.03.028 ◽

2017 ◽

Vol 43 ◽

pp. 167-178 ◽

Cited By ~ 14

Author(s):

Jarosław Ślizowski ◽

Leszek Lankof ◽

Kazimierz Urbańczyk ◽

Karolina Serbin

Keyword(s):

Rock Salt ◽

Gas Storage ◽

Potential Capacity

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Critical Length and Collapse of Interlayer in Rock Salt Natural Gas Storage

Advances in Civil Engineering ◽

10.1155/2018/8658501 ◽

2018 ◽

Vol 2018 ◽

pp. 1-8

Author(s):

Yingjie Wang ◽

Jianjun Liu

Keyword(s):

Mathematical Model ◽

Rock Salt ◽

Critical Length ◽

Gas Storage ◽

Mechanical Instability ◽

Calculation Results ◽

The Stability ◽

Salt Cavern Gas Storage ◽

The Mathematical Model ◽

Physical And Mechanical Characteristics

The existence of an interlayer has a significant effect on the stability of a rock salt gas storage cavity; therefore, an uncontrollable collapse of the interlayer would cause a series of issues. In this study, three types of mechanical instability criteria are comprehensively calculated. The limit radius of the interlayer is computed under different criteria, and the collapse radius of the interlayer is obtained by comparison. The calculation results of the mathematical model are highly accurate with respect to actual engineering logging data, in general with over 90% of accuracy. It is demonstrated that, besides the physical and mechanical characteristics of the sandwich, the location of the interlayer in the cavity and concentration of the brine also have an important effect on the collapse of the interlayer. The brine at the bottom of the cavity is nearly saturated. Therefore, an interlayer at this location does not easily collapse. The mathematical model established in this study is used in the seismic design and prediction of interlayer collapse during the construction of salt-cavern gas storage facilities in China.

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