A new method of surface subsidence prediction for natural gas storage cavern in bedded rock salts

doi:10.1007/s12665-016-5611-8

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	A new method of surface subsidence prediction for natural gas storage cavern in bedded rock salts
	Liu Wei 1,2,3; Li Yinping 1,2,3; Yang Chunhe 1,2,3; Jiang Deyi 1,2; Daemen, J. J. K.4; Chen Jie 1,2,3; Kong Junfeng 3
刊名	ENVIRONMENTAL EARTH SCIENCES
	2016
卷号	75 期号:9 页码:-
关键词	Bedded rock Salts Gas storage cavern Subsidence prediction Mogi model Semi-infinite space Validity
ISSN号	1866-6280
DOI	10.1007/s12665-016-5611-8
英文摘要	The surface subsidence above underground natural gas caverns in salt formations is mainly induced by the volume shrinkage of the cavern. In this paper a new method, based on the Mogi model, to predict the subsidence above bedded rock salts gas storage cavern is proposed. Firstly, the equivalent elastic boundary deformation of the cavern volume decrease is assumed to be the first-order approximation of the real subsidence induced by creep shrinkage. Secondly, the cavern shape is simplified to be a spherical one with the same depth and volume, subjected to the pressure change of hydrostatic pressure in the sphere. And then, solving for the subsidence above, the storage is analyzed as the boundary displacement problem of the spherical cavern subjected to pressure change of hydrostatic pressure in the sphere in semi-infinite space. Based on the equivalent elastic model, the Mogi model, which has been developed for subsidence prediction in volcano seismology, is introduced to solve the boundary displacement problem. Then the expressions for subsidence and for horizontal displacement are obtained. The advantage of the new method is that the ground displacements can be calculated directly from the cavern volume shrinkage, thus the calculation has much been simplified. The validity of the method is verified by comparing to numerical simulation results, which show that the Mogi model has high validity for subsidence prediction for the gas cavern in salt formations. In the end, some constructive discussions on the application and improvement of the Mogi model are presented for its further applications.
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Water Resources
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000376030100076
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/3871]
专题	岩土力学所知识全产出_期刊论文国家重点实验室知识产出_期刊论文
作者单位	1.Chongqing Univ, Coll Resources & Environm Sci; 2.Chongqing Univ, Coll Resources & Environm Sci, State Key Lab Coal Mine Disaster Dynam & Control, Chongqing 400044, Peoples R China; 3.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn ; 4.Univ Nevada, Machay Sch Earth Sci & Engn
推荐引用方式 GB/T 7714	Liu Wei,Li Yinping,Yang Chunhe,et al. A new method of surface subsidence prediction for natural gas storage cavern in bedded rock salts[J]. ENVIRONMENTAL EARTH SCIENCES,2016,75(9):-.
APA	Liu Wei.,Li Yinping.,Yang Chunhe.,Jiang Deyi.,Daemen, J. J. K..,...&Kong Junfeng.(2016).A new method of surface subsidence prediction for natural gas storage cavern in bedded rock salts.ENVIRONMENTAL EARTH SCIENCES,75(9),-.
MLA	Liu Wei,et al."A new method of surface subsidence prediction for natural gas storage cavern in bedded rock salts".ENVIRONMENTAL EARTH SCIENCES 75.9(2016):-.