Simulating the transport of brine in the strata of bedded salt cavern storage with a fluid-solid coupling model

doi:10.1016/j.enggeo.2020.105595

	Simulating the transport of brine in the strata of bedded salt cavern storage with a fluid-solid coupling model
	Chen, Xiangsheng 2,3; Li, Yinping 2; Ge, Xinbo 2,3; Shi, Xilin 2; Xue, Tianfu 1
刊名	ENGINEERING GEOLOGY
	2020-06-20
卷号	271 页码:9
关键词	Bedded salt cavern storage Brine transport Convection-diffusion equation Fluid-solid coupling Non-salt interlayer Permeability
ISSN号	0013-7952
DOI	10.1016/j.enggeo.2020.105595
英文摘要	The majority of salt mines in China are located in the strata of lacustrine deposition, which are interbedded structure consisting of rock salts and non-salt interlayers. In the solution mining stage, rock salts will be dissolved to form a cavity for storing natural gas or petroleum. But the non-salt interlayers will soften or even collapse under the immersion of brine (dissolved rock salt), some of which will sink to the cavern bottom to form insolubles, and the other part will become the surrounding rock of this cavity. The retention time of brine in a salt cavern depends on the cavern size and efficiency of solution mining, which is generally about three years. During this period, the brine can seep into the fractures and joints of interlayers, and then inevitably has physical and chemical interactions with the rock minerals (typically montmorillonite). To reveal the affected range and results of brine on the interlayers, this paper takes poro-elasticity theory into account convection-diffusion equation to form a new fluid-solid coupling equation, and then establishes an actual geomechanical simulation model for numerical solution. The calculation results show that the penetration of brine in interlayers is very obvious. The penetration range is 28.37 m within three years, which is about 5.6 times that of rock salt. As the penetration range increases, the brine pressure gradually decreases and eventually stabilizes. In addition, brine transport has complex coupling boundary conditions composed of concentration, pressure and geostress, which interact with each other. This research contents have important reference and guidance for the study on brine crystallization and halite self-healing, and can lay a foundation for the subsequent safe operation and tightness evaluation of salt cavern.
资助项目	National Natural Science Foundation of China[51874273] ; National Natural Science Foundation of China[51774266] ; National Key Research and Development Program of China[2018YFC0808401]
WOS研究方向	Engineering ; Geology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000532829600021
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/24103]
专题	中科院武汉岩土力学所
通讯作者	Li, Yinping; Shi, Xilin
作者单位	1.Chongqing Univ, State Key Lab Coal Mine Disaster & Control, Chongqing 400044, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100000, Peoples R China
推荐引用方式 GB/T 7714	Chen, Xiangsheng,Li, Yinping,Ge, Xinbo,et al. Simulating the transport of brine in the strata of bedded salt cavern storage with a fluid-solid coupling model[J]. ENGINEERING GEOLOGY,2020,271:9.
APA	Chen, Xiangsheng,Li, Yinping,Ge, Xinbo,Shi, Xilin,&Xue, Tianfu.(2020).Simulating the transport of brine in the strata of bedded salt cavern storage with a fluid-solid coupling model.ENGINEERING GEOLOGY,271,9.
MLA	Chen, Xiangsheng,et al."Simulating the transport of brine in the strata of bedded salt cavern storage with a fluid-solid coupling model".ENGINEERING GEOLOGY 271(2020):9.