Effect of permeability and fractures on oil mobilization of unconventional resources during CO2 EOR using nuclear magnetic resonance

Effect of permeability and fractures on oil mobilization of unconventional resources during CO2 EOR using nuclear magnetic resonance

Abstract CO2 EOR (enhanced oil recovery) will be one of main technologies of enhanced unconventional resources recovery. Understanding effect of permeability and fractures on the oil mobilization of unconventional resources, i.e. tight oil, is crucial during CO2 EOR process. Exposure experiments bas...

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Autores principales: Huanquan Sun, Haitao Wang, Zengmin Lun
Formato: article
Lenguaje:EN
Publicado: Nature Portfolio 2021
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Acceso en línea:https://doaj.org/article/1a0d307a300d40a095d528fb00a80866
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spelling oai:doaj.org-article:1a0d307a300d40a095d528fb00a808662021-12-02T17:40:49ZEffect of permeability and fractures on oil mobilization of unconventional resources during CO2 EOR using nuclear magnetic resonance10.1038/s41598-021-92158-32045-2322https://doaj.org/article/1a0d307a300d40a095d528fb00a808662021-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-92158-3https://doaj.org/toc/2045-2322Abstract CO2 EOR (enhanced oil recovery) will be one of main technologies of enhanced unconventional resources recovery. Understanding effect of permeability and fractures on the oil mobilization of unconventional resources, i.e. tight oil, is crucial during CO2 EOR process. Exposure experiments based on nuclear magnetic resonance (NMR) were used to study the interaction between CO2 and tight oil reservoirs in Chang 8 layer of Ordos Basin at 40 °C and 12 MPa. Effect of permeability and fractures on oil mobilization of exposure experiments were investigated for the different exposure time. The oil was mobilized from matrix to the surface of matrix and the oil recovery increased as the exposure time increased. The final oil recovery increased as the core permeability increased in these exposure experiments. Exposure area increased to 1.75 times by fractures resulting in that oil was mobilized faster in the initial stage of exposure experiment and the final oil recovery increased to 1.19 times from 28.8 to 34.2%. This study shows the quantitative results of effect of permeability and fractures on oil mobilization of unconventional resources during CO2 EOR, which will support CO2 EOR design in Chang 8 layer of Ordos Basin.Huanquan SunHaitao WangZengmin LunNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-6 (2021)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
Huanquan Sun
Haitao Wang
Zengmin Lun
Effect of permeability and fractures on oil mobilization of unconventional resources during CO2 EOR using nuclear magnetic resonance
description Abstract CO2 EOR (enhanced oil recovery) will be one of main technologies of enhanced unconventional resources recovery. Understanding effect of permeability and fractures on the oil mobilization of unconventional resources, i.e. tight oil, is crucial during CO2 EOR process. Exposure experiments based on nuclear magnetic resonance (NMR) were used to study the interaction between CO2 and tight oil reservoirs in Chang 8 layer of Ordos Basin at 40 °C and 12 MPa. Effect of permeability and fractures on oil mobilization of exposure experiments were investigated for the different exposure time. The oil was mobilized from matrix to the surface of matrix and the oil recovery increased as the exposure time increased. The final oil recovery increased as the core permeability increased in these exposure experiments. Exposure area increased to 1.75 times by fractures resulting in that oil was mobilized faster in the initial stage of exposure experiment and the final oil recovery increased to 1.19 times from 28.8 to 34.2%. This study shows the quantitative results of effect of permeability and fractures on oil mobilization of unconventional resources during CO2 EOR, which will support CO2 EOR design in Chang 8 layer of Ordos Basin.
format article
author Huanquan Sun
Haitao Wang
Zengmin Lun
author_facet Huanquan Sun
Haitao Wang
Zengmin Lun
author_sort Huanquan Sun
title Effect of permeability and fractures on oil mobilization of unconventional resources during CO2 EOR using nuclear magnetic resonance
title_short Effect of permeability and fractures on oil mobilization of unconventional resources during CO2 EOR using nuclear magnetic resonance
title_full Effect of permeability and fractures on oil mobilization of unconventional resources during CO2 EOR using nuclear magnetic resonance
title_fullStr Effect of permeability and fractures on oil mobilization of unconventional resources during CO2 EOR using nuclear magnetic resonance
title_full_unstemmed Effect of permeability and fractures on oil mobilization of unconventional resources during CO2 EOR using nuclear magnetic resonance
title_sort effect of permeability and fractures on oil mobilization of unconventional resources during co2 eor using nuclear magnetic resonance
publisher Nature Portfolio
publishDate 2021
url https://doaj.org/article/1a0d307a300d40a095d528fb00a80866
work_keys_str_mv AT huanquansun effectofpermeabilityandfracturesonoilmobilizationofunconventionalresourcesduringco2eorusingnuclearmagneticresonance
AT haitaowang effectofpermeabilityandfracturesonoilmobilizationofunconventionalresourcesduringco2eorusingnuclearmagneticresonance
AT zengminlun effectofpermeabilityandfracturesonoilmobilizationofunconventionalresourcesduringco2eorusingnuclearmagneticresonance
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