Failure analysis for gas storage salt cavern by thermo-mechanical modelling considering rock salt creep

2020 ◽  
Vol 32 ◽  
pp. 102004
Author(s):  
Wenjing Li ◽  
Xiuxiu Miao ◽  
Chunhe Yang
Keyword(s):  
Failure Analysis ◽  
Rock Salt ◽  
Gas Storage ◽  
Salt Cavern ◽  
Salt Creep ◽  
Mechanical Modelling

Rock Long-Term Strength Parameters Determination of a Salt Cavern Gas Storage

2013 ◽  
Vol 353-356 ◽  
pp. 1685-1688
Author(s):  
Li Na Ran ◽  
Hua Bin Zhang ◽  
Zhi Yin Wang
Keyword(s):  
Mechanical Properties ◽  
Rock Salt ◽  
Gas Storage ◽  
Surrounding Rock ◽  
Creep Process ◽  
Term Strength ◽  
Salt Cavern ◽  
Study Results ◽  
Salt Cavern Gas Storage

In order to determine the long-term mechanical properties of surrounding rock of salt cavern gas storage, long tri-axial creep test studies on rock salt of the field were carried out. Based on the test data, long-term strength of rock salt was determined, and comparatively analysis was conducted combined with of the instantaneous test. The study results show that: Considering the axial strain, radial strain and volumetric strain to determine the long-term strength of rock salt can ensure reliability of the results. Under the same condition, the less salt content, the value of long-term strength is higher. Tri-axial creep process has a different effect degree between cohesion and internal friction angle; it is more sensitive to cohesion. The strain limit should be considered for the stability analysis of multi-bedded salt cavern gas storage construction and pay more attention about the mechanical properties of the interlayer parts. The study results provide references for researching the surrounding rock long-term mechanical properties of salt cavern gas storage.

Failure Analysis of Overhanging Blocks in the Walls of a Gas Storage Salt Cavern: A Case Study

2016 ◽  
Vol 50 (1) ◽  
pp. 125-137 ◽  
Author(s):  
Tongtao Wang ◽  
Chunhe Yang ◽  
Jianjun Li ◽  
Jinlong Li ◽  
Xilin Shi ◽  
...  
Keyword(s):  
Failure Analysis ◽  
Gas Storage ◽  
Salt Cavern

Softening model for failure analysis of insoluble interlayers during salt cavern leaching for natural gas storage

2018 ◽  
Vol 13 (4) ◽  
pp. 801-816 ◽  
Author(s):  
Xilin Shi ◽  
Wei Liu ◽  
Jie Chen ◽  
Deyi Jiang ◽  
Fei Wu ◽  
...  
Keyword(s):  
Natural Gas ◽  
Failure Analysis ◽  
Gas Storage ◽  
Natural Gas Storage ◽  
Salt Cavern

scholarly journals Numerical Investigation on Shape Optimization of Small-Spacing Twin-Well for Salt Cavern Gas Storage in Ultra-Deep Formation

Energies ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2859
Author(s):  
Haitao Li ◽  
Jingen Deng ◽  
Qiqi Wanyan ◽  
Yongcun Feng ◽  
Arnaud Regis Kamgue Lenwoue ◽  
...  
Keyword(s):  
Safety Evaluation ◽  
Gas Storage ◽  
Gas Pressure ◽  
Salt Cavern ◽  
Well Spacing ◽  
3D Geomechanical Model ◽  
The Stability ◽  
Bedded Rock Salt ◽  
Salt Cavern Gas Storage ◽  
Small Spacing

Small-spacing twin-well (SSTW) salt caverns have an extensive application prospect in thin or bedded rock salt formations due to their good performance, while they are rarely used in ultra-deep formations. The target strata depth of Pingdingshan salt mine is over 1700 m, and it is planned to apply an SSTW cavern to construct the underground gas storage (UGS). A 3D geomechanical model considering the viscoelastic plasticity of the rock mass is introduced into Flac3D to numerically study the influence of internal gas pressure, cavern upper shape and well spacing on the stability of an SSTW salt cavern for Pingdingshan UGS. A set of assessment indices is summarized for the stability of gas storage. The results show that the minimum internal gas pressure is no less than 14 MPa, and the cavern should not be operated under constant low gas pressure for a long time. The cavern with an upper height of 70 m is recommended for Pingdingshan gas storage based on the safety evaluation and maximum volume. The well spacing has a limited influence on the stability of the salt cavern in view of the volume shrinkage and safety factor. Among the values of 10 m, 20 m and 30 m, the well spacing of 20 m is recommended for Pingdingshan gas storage. In addition, when the cavern groups are constructed, the pillar width on the short axis should be larger than that on the long axis due to its greater deformation in this direction. This study provides a design reference for the construction of salt cavern gas storage in ultra-deep formations with the technology of SSTW.

Parameter optimization of solution mining under nitrogen for the construction of a gas storage salt cavern

2021 ◽  
pp. 103954
Author(s):  
Jianfu Wang ◽  
Guoyin An ◽  
Baodong Shan ◽  
Wenquan Wang ◽  
Jianchao Jia ◽  
...  
Keyword(s):  
Parameter Optimization ◽  
Gas Storage ◽  
Salt Cavern ◽  
Solution Mining

Prediction method for calculating the porosity of insoluble sediments for salt cavern gas storage applications

Energy ◽  
2021 ◽  
Vol 221 ◽  
pp. 119815
Author(s):  
Peng Li ◽  
Yinping Li ◽  
Xilin Shi ◽  
Kai Zhao ◽  
Xin Liu ◽  
...  
Keyword(s):  
Prediction Method ◽  
Gas Storage ◽  
Salt Cavern ◽  
Salt Cavern Gas Storage
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