Study on Sealing Failure of Wellbore in Bedded Salt Cavern Gas Storage

2018 ◽  
Vol 52 (1) ◽  
pp. 215-228 ◽  
Author(s):  
Xiangsheng Chen ◽  
Yinping Li ◽  
Wei Liu ◽  
Hongling Ma ◽  
Jianli Ma ◽  
...  
Keyword(s):  
Gas Storage ◽  
Salt Cavern ◽  
Salt Cavern Gas Storage ◽  
Sealing Failure

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.

scholarly journals Analysis of Serious Deformation of Cavitation Tubing in Salt Cavern Gas Storage in Jianghan Oilfield

2021 ◽  
Vol 791 (1) ◽  
pp. 012130
Author(s):  
Hu Wei ◽  
Fan Shigang ◽  
Wang Chenglin ◽  
Yuan Guohai
Keyword(s):  
Gas Storage ◽  
Salt Cavern ◽  
Salt Cavern Gas Storage

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

Research on Tubing and Casing Anti-Bending Technology for Salt Cavern Gas Storage Cavity Construction

2020 ◽  
Author(s):  
Xueqi Cen ◽  
Hao Zeng ◽  
Haibo Wang ◽  
Xiao Huang ◽  
Rusheng Zhang ◽  
...  
Keyword(s):  
Gas Storage ◽  
Salt Cavern ◽  
Salt Cavern Gas Storage

scholarly journals The Influence of Operation Pressure on the Long-Term Stability of Salt-Cavern Gas Storage

2014 ◽  
Vol 6 ◽  
pp. 537679 ◽  
Author(s):  
Jianjun Liu ◽  
Qiang Xiao
Keyword(s):  
Internal Pressure ◽  
Element Model ◽  
Gas Storage ◽  
Salt Cavern ◽  
Term Stability ◽  
Long Term Stability ◽  
Rock Creep ◽  
Operation Pressure ◽  
Salt Cavern Gas Storage

The operation pressure of underground salt-cavern gas storage directly affects its stability. Because of seasonal demand and other emergency reasons, the gas storage working pressures always change from high to low or from low to high cyclic variation. In order to analyze the effect of gas storage pressure changing on its long-term stability, considering the salt rock creep, a 3D finite element model was built using the software Abaqus. Moreover, the deformation and analyzed results of the storage under 0 MPa, 4 MPa, 6 MPa, 8 MPa, 10 MPa, and 12 MPa and also circulating changes pressure operation were given in the 10-year creep. It concluded that how working pressures have effect on long-term stability of salt-cavern gas storage. The research results indicated that the long-term creep performance of underground salt cavern gas storage is affected by internal pressure, the smaller the internal pressure creep is, the more obvious the creep and the greater deformation of gas storage are. The greater the internal pressure is, the smaller the deformation of the gas storage is. The low pressure and excessive high pressure must be avoided during the operation of gas storage. These results have an important significance on determining the reasonable pressure of gas storage operation and ensure the long-term stability of gas storage.

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