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Adsorption-induced pore blocking and its mechanisms in nanoporous shale due to interactions with supercritical CO2
Huang XF(黄先富)1,2; Zhao YP(赵亚溥)1,2; Wang XH(王晓荷)1,2; Pan LS(潘利生)3
Source PublicationJOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
2019-07-01
Volume178Pages:74-81
ISSN0920-4105
Abstract

Supercritical carbon dioxide (sCO(2)) has recently been used to recover hydrocarbons from shale formations due to its advantages in boosting production, saving water, and minimizing environmental impacts. Meanwhile, CO2 is sealed up underground, which would cut down the greenhouse gas emissions and reduce global warming. However, current knowledge regarding how sCO(2) interacts with shale, especially its nanopores which are responsible for adsorption, migration and storage of oil and gas, has been lacking. Here we show that after sCO(2) adsorption, the total pore volume decreases by similar to 20% in nanoporous shale, majorly by up to 60% in the range of 0.85-2.0 nm. We analyze the morphology and composition changes in shale, and show that the nanopore is either closed up or newly opened, with more closed pores than new ones. We for the first time propose that this adsorption-induced pore blocking phenomenon is jointly voluminal and geochemical resulted from physisorpfion, associative chemisorption and dissociative chemisorption of sCO(2) in shale. Our results help to effectively assess the hydrocarbon production capacity in shale gas reservoirs using CO2-fracking technique, and the CO2 storage potential in shale formations.

KeywordShale oil and gas CO2 sequestration Swelling Chemical reaction Nitrogen adsorption isotherm XPS
DOI10.1016/j.petrol.2019.03.018
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000466615500005
WOS KeywordGAS-ADSORPTION ; STORAGE CAPACITY ; MARCELLUS SHALE ; SURFACE-AREA ; NATURAL-GAS ; METHANE ; MODEL ; TRANSPORT ; PRESSURE ; RECOVERY
WOS Research AreaEnergy & Fuels ; Engineering
WOS SubjectEnergy & Fuels ; Engineering, Petroleum
Funding ProjectNational Natural Science Foundation of China (NSFC)[11702299] ; National Natural Science Foundation of China (NSFC)[11872363] ; National Natural Science Foundation of China (NSFC)[51861145314] ; Chinese Academy of Sciences (CAS) Interdisciplinary Innovation Team Project ; CAS Key Research Program of Frontier Sciences[QYZDJ-SSW-JSC019] ; CAS Strategic Priority Research Program[XDB22040401]
Funding OrganizationNational Natural Science Foundation of China (NSFC) ; Chinese Academy of Sciences (CAS) Interdisciplinary Innovation Team Project ; CAS Key Research Program of Frontier Sciences ; CAS Strategic Priority Research Program
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/79183
Collection非线性力学国家重点实验室
高温气体动力学国家重点实验室
Affiliation1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China;
2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China;
3.Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Huang XF,Zhao YP,Wang XH,et al. Adsorption-induced pore blocking and its mechanisms in nanoporous shale due to interactions with supercritical CO2[J]. JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING,2019,178:74-81.
APA Huang XF,Zhao YP,Wang XH,&Pan LS.(2019).Adsorption-induced pore blocking and its mechanisms in nanoporous shale due to interactions with supercritical CO2.JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING,178,74-81.
MLA Huang XF,et al."Adsorption-induced pore blocking and its mechanisms in nanoporous shale due to interactions with supercritical CO2".JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING 178(2019):74-81.
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