Creep deformation analysis of gas storage in salt caverns

doi:10.1016/j.ijrmms.2021.104635

	Creep deformation analysis of gas storage in salt caverns
	Ma, Xuqiang 1; Xu, Zijun 1; Chen, Liuping 1; Shi, Xilin 2
刊名	INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
	2021-03-01
卷号	139 页码:7
关键词	Analytical solution Creep Gas storage Salt cavern Shrinkage
ISSN号	1365-1609
DOI	10.1016/j.ijrmms.2021.104635
英文摘要	The creep shrinkage of a salt cavern with constant gas pressures was studied. The gas pressures have constant values, but their positions (i.e. cavern radii) change with time, which is negligible for small deformations rather than for large deformations. Based on whether the displacement of the cavern wall is considered in boundary conditions, small and large deformation solutions for cavern creep shrinkage were developed. To validate the solutions, the analytical results were compared with the numerical results. The results of the large deformation solutions showed good agreement with the numerical results in the case of small and large deformations. However, the small deformation solutions only applied when their results were sufficiently small; otherwise, the cavern shrinkage was overestimated. In addition, the sensitivity of cavern shrinkage to factors, such as time, creep parameters, and the difference between the geostatic pressure and gas pressure (pressure difference), was discussed. In some cases, the results of the large deformation solutions showed that the cavern shrinkage grows over time at a declining rate instead of a constant rate. For caverns of rock salt with great creep parameters, such as D and n in the Norton power law, the cavern shrinkage was fast. The cavern shrinkage rate decreased as the pressure difference decreased. The minimum internal pressure obtained by the large deformation solutions was lower than that obtained by the small deformation solutions, which can help to reduce the cushion gas in salt caverns. The large deformation solutions can provide useful references for gas storage in salt caverns.
资助项目	Key Research and Development Program of Jiangsu Province of China[BE2018071] ; Business Startups and Innovation Program of Jiangsu Province of China ; National Natural Science Foundation of China[51774266] ; Youth Innovation Promotion Association CAS[2019324]
WOS研究方向	Engineering ; Mining & Mineral Processing
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000633038700002
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/25976]
专题	中科院武汉岩土力学所
通讯作者	Ma, Xuqiang
作者单位	1.China Salt Jintan Co Ltd, Jintan Salt Mine, Jintan 213200, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China
推荐引用方式 GB/T 7714	Ma, Xuqiang,Xu, Zijun,Chen, Liuping,et al. Creep deformation analysis of gas storage in salt caverns[J]. INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES,2021,139:7.
APA	Ma, Xuqiang,Xu, Zijun,Chen, Liuping,&Shi, Xilin.(2021).Creep deformation analysis of gas storage in salt caverns.INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES,139,7.
MLA	Ma, Xuqiang,et al."Creep deformation analysis of gas storage in salt caverns".INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES 139(2021):7.