Microscopic Pore Structure of Surrounding Rock for Underground Strategic Petroleum Reserve (SPR) Caverns in Bedded Rock Salt

doi:10.3390/en13071565

	Microscopic Pore Structure of Surrounding Rock for Underground Strategic Petroleum Reserve (SPR) Caverns in Bedded Rock Salt
	Zhang, Nan 1; Liu, Wei 3; Zhang, Yun 1; Shan, Pengfei 1; Shi, Xilin 2
刊名	ENERGIES
	2020-04-01
卷号	13 期号:7 页码:22
关键词	strategic petroleum reserve (SPR) bedded rock salt salt cavern pore characteristic gas adsorption
DOI	10.3390/en13071565
英文摘要	Using salt caverns for an underground strategic petroleum reserve (SPR) is considered as an ideal approach due to the excellent characteristics of low porosity, low permeability, self-healing of damage, and strong plastic deformation ability of rock salt. Salt deposits in China are mostly layered rock salt structures, with the characteristics of many interlayers, bringing great challenges for the construction of SPR facilities. Studying the microscopic pore characteristics of the rock surrounding SPR salt caverns in different environments (with brine and crude oil erosion) is necessary because the essence of mechanical and permeability characteristics is the macroscopic embodiment of the microscopic pore structure. In this paper, XRD tests and SEM tests are carried out to determine the physical properties of storage media and surrounding rock. Gas adsorption tests and mercury intrusion tests are carried out to analyze the microscopic pore structure, specific surface area variation and total aperture distribution characteristics of SPR salt cavern host rock. Results show that: (1) Large numbers of cores in interlayer and caprock may provide favorable channels for the leakage of high-pressure crude oil and brine. (2) The blockage of pores by macromolecular organic matter (colloid and asphaltene) in crude oil will not significantly change the structural characteristics of the rock skeleton, which is beneficial to the long-term operation of the SPR salt cavern. (3) The water-rock interaction will bring obvious changes in the micro-pore structure of rock and increase the leakage risk of the storage medium. The results can provide theoretical bases and methods for the tightness analysis of China's first underground SPR salt cavern.
资助项目	State key laboratory of geotechnical mechanics and engineering open fund[Z019012] ; National Natural Science Foundation of China[51904227] ; National Natural Science Foundation of China[51774266] ; 973 Key National Basic Research Program of China[2015CB251602] ; Key Natural Science Foundation of Shaanxi Province[2019JLZ-04] ; Chongqing Basic Research and Frontier Exploration Project[cstc2018jcyjAX0441]
WOS研究方向	Energy & Fuels
语种	英语
出版者	MDPI
WOS记录号	WOS:000537688400034
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/24281]
专题	中科院武汉岩土力学所
通讯作者	Zhang, Nan; Liu, Wei
作者单位	1.Xian Univ Sci & Technol, Sch Energy Sci & Engn, Key Lab Western Mines & Hazard Prevent, Minist Educ China, Xian 710054, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotechn Engn, Wuhan 430071, Peoples R China 3.Chongqing Univ, State Key Lab Coal Mine Disaster & Control, Chongqing 400044, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Nan,Liu, Wei,Zhang, Yun,et al. Microscopic Pore Structure of Surrounding Rock for Underground Strategic Petroleum Reserve (SPR) Caverns in Bedded Rock Salt[J]. ENERGIES,2020,13(7):22.
APA	Zhang, Nan,Liu, Wei,Zhang, Yun,Shan, Pengfei,&Shi, Xilin.(2020).Microscopic Pore Structure of Surrounding Rock for Underground Strategic Petroleum Reserve (SPR) Caverns in Bedded Rock Salt.ENERGIES,13(7),22.
MLA	Zhang, Nan,et al."Microscopic Pore Structure of Surrounding Rock for Underground Strategic Petroleum Reserve (SPR) Caverns in Bedded Rock Salt".ENERGIES 13.7(2020):22.