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Characterization of pore structures and gas transport characteristics of Longmaxi shale
Cao GH(曹高辉); Lin M(林缅); Ji L(姬莉); Jiang WB(江文滨); Yang M(杨明)
Source PublicationFuel
2019-08
Volume258Pages:10.1016/j.fuel.2019.116146
ISSN0016-2361
Abstract

Multiscale pore structures of shale conjunctionally determine the gas storage and transport properties of gas shale reservoirs. To investigate the complex pore structures and gas transport in the ultra-tight porous media, a combination of petrophysical and scanning measurements is adopted in this study. Five shale samples of the main productive layers from four wells (Long 1(1) sub-members of Longmaxi Formation) in southeast Sichuan Basin, China are analyzed. Based on scanning electron microscope (SEM) image, different types of organic pores and inorganic pores are quantitatively analyzed. A method for identification of organic and inorganic pores from SEM images is developed. And a comparison between the pores identified from SEM and gas adsorption (N-2 and CO2 adsorption) is conducted. Results show that the main part of inorganic pores are mesopores, and the organic pore size distributions tend to be lognormal with the peak pore size from 10 nm to 30 nm. Results also show that the gas storage space obtained by SEM is several times to several tens of times larger than that obtained by gas adsorption method. The permeability of OM and shale cores is also compared. The permeability is strongly anisotropic and all those samples show a significant non-Darcy effect. Finally, the relationship between the pore structures and gas transport behavior is studied, and the high quality shale samples are identified considering their gas storage and transport behaviors.

KeywordShale Pore structure Anisotropic permeability Longmaxi Formation
DOI10.1016/j.fuel.2019.116146
Indexed BySCI ; EI
Language英语
WOS IDWOS:000487820500056
WOS KeywordCOUPLED MODEL ; SICHUAN BASIN ; PERMEABILITY ; STORAGE ; SIMULATION ; POROSITY ; MATRIX ; SAMPLE ; FLOW
WOS Research AreaEnergy & Fuels ; Engineering
WOS SubjectEnergy & Fuels ; Engineering, Chemical
Funding ProjectNational Natural Science Foundation of China[41690132] ; National Natural Science Foundation of China[41872163] ; National Natural Science Foundation of China[41574129] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA14010304] ; Major National Science and Technology Special Program of China[2017ZX05037-001]
Funding OrganizationNational Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Major National Science and Technology Special Program of China
Classification一类
Ranking1
ContributorLin M
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/79772
Collection流固耦合系统力学重点实验室
Affiliation1.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Cao GH,Lin M,Ji L,et al. Characterization of pore structures and gas transport characteristics of Longmaxi shale[J]. Fuel,2019,258:10.1016/j.fuel.2019.116146.
APA Cao GH,Lin M,Ji L,Jiang WB,&Yang M.(2019).Characterization of pore structures and gas transport characteristics of Longmaxi shale.Fuel,258,10.1016/j.fuel.2019.116146.
MLA Cao GH,et al."Characterization of pore structures and gas transport characteristics of Longmaxi shale".Fuel 258(2019):10.1016/j.fuel.2019.116146.
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