Creep-damage constitutive model based on fractional derivatives and its application in salt cavern gas storage

2021 ◽  
Vol 44 ◽  
pp. 103403
Author(s):  
Cheng Lyu ◽  
Jianfeng Liu ◽  
Chengxing Zhao ◽  
Yi Ren ◽  
Chao Liang
Keyword(s):  
Constitutive Model ◽  
Fractional Derivatives ◽  
Creep Damage ◽  
Gas Storage ◽  
Salt Cavern ◽  
Model Based ◽  
Damage Constitutive Model ◽  
Salt Cavern Gas Storage

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

Application of a Creep Damage Constitutive Model for the Rotor of a 1000 MW Ultra-Supercritical Steam Turbine

2015 ◽  
Author(s):  
Jishen Jiang ◽  
Weizhe Wang ◽  
Nailong Zhao ◽  
Peng Wang ◽  
Yingzheng Liu ◽  
...  
Keyword(s):  
Constitutive Model ◽  
Steam Turbine ◽  
Axial Stress ◽  
Creep Damage ◽  
Turbine Rotor ◽  
Creep Analysis ◽  
Wide Range ◽  
Damage Constitutive Model ◽  
Creep Constitutive Model ◽  
Basic Features

A damage-based creep constitutive model for a wide stress range is applied to the creep analysis of a 1000 MW ultra-supercritical steam turbine, the inlet steam of which reaches 600°C and 35 MPa. In this model, the effect of complex multi-axial stress and the nonlinear evolution of damage are considered. To this end, the model was implemented into the commercial software ABAQUS using a user-defined material subroutine code. The temperature dependent material constants were identified from the experimental data of advanced heat resistant steels using curve fitting approaches. A comparison of the simulated and the measured results showed that they reached an acceptable agreement. The results of the creep analysis illustrated that the proposed approach explains the basic features of stress redistribution and the damage evolution in the steam turbine rotor over a wide range of stresses and temperatures.

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