Investigation of thermal-mechanical effects on salt cavern during cycling loading

doi:10.1016/j.energy.2021.120969

	Investigation of thermal-mechanical effects on salt cavern during cycling loading
	Li, Wenjing 3,4; Nan, Xing 2,4; Chen, Jiasong 1; Yang, Chunhe 3
刊名	ENERGY
	2021-10-01
卷号	232 页码:13
关键词	Salt cavern Thermal-mechanical coupling Gas injection-and-withdrawal Thermal damage Collapse
ISSN号	0360-5442
DOI	10.1016/j.energy.2021.120969
英文摘要	Traditional stability analysis for salt cavern as UGS overlooks the thermal effects induced by cycling loading and cannot predict the potential risk. In this study viscoelastic WIPP model is employed to describe the temperature-dependent creep behavior of rock salt. A thermal-mechanical simulation framework is established to couple the effect of mechanical stress and thermal stress. A coupling thermal-mechanical numerical model implemented by FLAC3D in combination with the WIPP creep model is proposed. A field case, Cavern L, in Jintan, Jiangsu Province of China is demonstrated in this paper to explore the thermal response to gas injection-and-withdrawal process. The results show that there is tensile stress concentration region at the cavern roof. The dynamic process of thermal damage evolution and block falls on cavern roof is also investigated. The disintegration of rock salt mass at cavern roof occurs after the most severe gas depressurization period, and the retain of low pressure after gas withdrawal aggravate the thermal damage. It indicates that the thermal-induced tensile stresses are critical for salt cavern stability assessment. The feasibility and accuracy of the proposed thermal-mechanical modeling is verified by the field case, and the simulation results of thermal damage are coincided with the sonar results. This analysis confirmed the influence of thermal-mechanical effects on salt cavern wall. The approach used in this study provides an improved method for the stability evalu-ation and optimal operation parameters for salt caverns. (c) 2021 Elsevier Ltd. All rights reserved.
WOS研究方向	Thermodynamics ; Energy & Fuels
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000709712200004
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/28386]
专题	中科院武汉岩土力学所
通讯作者	Li, Wenjing
作者单位	1.China Oil & Gas Piping Network Corp, Jiangsu Gas Storage Co, Zhenjiang 212028, Jiangsu, Peoples R China 2.Sinochem Energy Corp Ltd, Beijing 100031, Peoples R China 3.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China 4.China Univ Petr, Minist Educ, Key Lab Petr Engn Beijing, Beijing Key Lab Urban Oil & Gas Distribut Technol, Beijing 102249, Peoples R China
推荐引用方式 GB/T 7714	Li, Wenjing,Nan, Xing,Chen, Jiasong,et al. Investigation of thermal-mechanical effects on salt cavern during cycling loading[J]. ENERGY,2021,232:13.
APA	Li, Wenjing,Nan, Xing,Chen, Jiasong,&Yang, Chunhe.(2021).Investigation of thermal-mechanical effects on salt cavern during cycling loading.ENERGY,232,13.
MLA	Li, Wenjing,et al."Investigation of thermal-mechanical effects on salt cavern during cycling loading".ENERGY 232(2021):13.