Allowable pillar width for bedded rock salt caverns gas storage

doi:10.1016/j.petrol.2015.01.040

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	Allowable pillar width for bedded rock salt caverns gas storage
	Wang, Tongtao 1,2; Yang, Chunhe 2; Yan, Xiangzhen 1; Daemen, J. J. K.3
刊名	JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
	2015
卷号	127 页码:433-444
关键词	underground gas storage natural gas salt cavern pillar width safety numerical simulation
ISSN号	0920-4105
DOI	10.1016/j.petrol.2015.01.040
英文摘要	Three-dimensional numerical models of bedded rock salt cavern gas storages of Jintan salt mine. Jiangsu province, China, are established using FLAC(3D) simulator to investigate factors affecting the allowable width for pillars between two adjacent caverns. Vertical stress, deformation, plastic zone, safety factors, and seepage pressure of pillars between two adjacent salt caverns are discussed, and the allowable width of the pillars is optimized. Results show that the vertical stress on the pillars increases with depth and decreases with increasing pillar width, gas pressure inside the caverns, and creep time, i.e., cavern operating duration. Rock salt creep gradually smoothens the vertical stresses on the pillars, and the effect is expected to become imperceptible after five years. An increase in gas pressure difference between the caverns increases shear stresses in the pillars, which aggravates the unevenness of stress distributions and reduces the stability of the pillars. The asynchronous injection-production mode has negative effects on pillar stability and seepage pressure, particularly for narrow pillars. Interlayer permeability and pillar width are key factors affecting seepage through the pillars. The allowable pillar width for bedded salt cavern gas storage groups in Jintan salt mine. Jiangsu province, China, is proposed based on vertical stress, deformation, plastic zone, safety factors, and seepage pressure, and is recommended to be 2.0-2.5 times the maximum diameter of a cavern. This is a smaller range than the pillar width proposed by available codes, which ranges from 1.5 to 3.0 times the maximum diameter of a cavern. This decreases the uncertainty in the pillar width design caused by the conventional wide range and can increase the efficient use of the rock salt resources. The study provides fundamental data and references for designing pillars for salt cavern gas storages in other areas with similar conditions. (C) 2015 Elsevier B.V. All rights reserved.
WOS研究方向	Energy & Fuels ; Engineering
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000351782400039
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/3697]
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.China Univ Petr, Coll Pipeline & Civil Engn ; 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn ; 3.Univ Nevada, Mackay Sch Earth Sci & Engn
推荐引用方式 GB/T 7714	Wang, Tongtao,Yang, Chunhe,Yan, Xiangzhen,et al. Allowable pillar width for bedded rock salt caverns gas storage[J]. JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING,2015,127:433-444.
APA	Wang, Tongtao,Yang, Chunhe,Yan, Xiangzhen,&Daemen, J. J. K..(2015).Allowable pillar width for bedded rock salt caverns gas storage.JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING,127,433-444.
MLA	Wang, Tongtao,et al."Allowable pillar width for bedded rock salt caverns gas storage".JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING 127(2015):433-444.