Physical simulation of pore filling pressure gradient at different scales in shale oil reservoirs.
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| Title: | Physical simulation of pore filling pressure gradient at different scales in shale oil reservoirs. |
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| Authors: | Zhao, Ying1,2 (AUTHOR), Wei, Jianguang2 (AUTHOR), Zhang, Jinyou2 (AUTHOR), Song, Zhaojie1 (AUTHOR) songz@cup.edu.cn, Xian, Chenggang1 (AUTHOR), Yang, Ying2 (AUTHOR) |
| Source: | Canadian Journal of Chemical Engineering. Mar2026, Vol. 104 Issue 3, p1630-1648. 19p. |
| Subjects: | Nuclear magnetic resonance, Pore fluids, Pore water pressure, Petroleum reservoirs |
| Abstract: | The influence mechanism of filling pressure gradient on pores of different scales is complex. In this paper, firstly, the nuclear magnetic resonance method is used to measure the spontaneous imbibition water and spontaneous imbibition oil of different scale pores in shale, revealing the differences in the multiscale pore‐fluid interaction mechanism in shale oil reservoirs. On this basis, the oil injection volume of different scale pores in shale is quantified using displacement and two‐dimensional nuclear magnetic resonance measurement technology under different injection pressure conditions, and the injection pressure gradient (start‐up pressure gradient) of different scale pores is clarified. Results show that (a) in non‐aqueous calcite and illite systems, when the oil/pore ratio is 27%, shale oil is filled in the pore throats; when the oil/pore ratio is ≤20%, water channels are formed inside the shale oil. (b) The small, medium, and large pores of block shale are basically saturated during 1.2 MPa pressure differential displacement, with a saturation degree of 95% and an average pressure gradient of 39.2 MPa/m; (c) The small, medium, and large pores of rich‐bedding shale are basically saturated with a pressure difference of 0.5 MPa during displacement, with a saturation degree of 95% and a pressure gradient of 14.2 MPa/m. [ABSTRACT FROM AUTHOR] |
| Copyright of Canadian Journal of Chemical Engineering is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Header | DbId: egs DbLabel: Engineering Source An: 191457648 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Physical simulation of pore filling pressure gradient at different scales in shale oil reservoirs. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Zhao%2C+Ying%22">Zhao, Ying</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wei%2C+Jianguang%22">Wei, Jianguang</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Jinyou%22">Zhang, Jinyou</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Song%2C+Zhaojie%22">Song, Zhaojie</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> songz@cup.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Xian%2C+Chenggang%22">Xian, Chenggang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yang%2C+Ying%22">Yang, Ying</searchLink><relatesTo>2</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Canadian+Journal+of+Chemical+Engineering%22">Canadian Journal of Chemical Engineering</searchLink>. Mar2026, Vol. 104 Issue 3, p1630-1648. 19p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Nuclear+magnetic+resonance%22">Nuclear magnetic resonance</searchLink><br /><searchLink fieldCode="DE" term="%22Pore+fluids%22">Pore fluids</searchLink><br /><searchLink fieldCode="DE" term="%22Pore+water+pressure%22">Pore water pressure</searchLink><br /><searchLink fieldCode="DE" term="%22Petroleum+reservoirs%22">Petroleum reservoirs</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The influence mechanism of filling pressure gradient on pores of different scales is complex. In this paper, firstly, the nuclear magnetic resonance method is used to measure the spontaneous imbibition water and spontaneous imbibition oil of different scale pores in shale, revealing the differences in the multiscale pore‐fluid interaction mechanism in shale oil reservoirs. On this basis, the oil injection volume of different scale pores in shale is quantified using displacement and two‐dimensional nuclear magnetic resonance measurement technology under different injection pressure conditions, and the injection pressure gradient (start‐up pressure gradient) of different scale pores is clarified. Results show that (a) in non‐aqueous calcite and illite systems, when the oil/pore ratio is 27%, shale oil is filled in the pore throats; when the oil/pore ratio is ≤20%, water channels are formed inside the shale oil. (b) The small, medium, and large pores of block shale are basically saturated during 1.2 MPa pressure differential displacement, with a saturation degree of 95% and an average pressure gradient of 39.2 MPa/m; (c) The small, medium, and large pores of rich‐bedding shale are basically saturated with a pressure difference of 0.5 MPa during displacement, with a saturation degree of 95% and a pressure gradient of 14.2 MPa/m. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Canadian Journal of Chemical Engineering is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1002/cjce.70090 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 19 StartPage: 1630 Subjects: – SubjectFull: Nuclear magnetic resonance Type: general – SubjectFull: Pore fluids Type: general – SubjectFull: Pore water pressure Type: general – SubjectFull: Petroleum reservoirs Type: general Titles: – TitleFull: Physical simulation of pore filling pressure gradient at different scales in shale oil reservoirs. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Zhao, Ying – PersonEntity: Name: NameFull: Wei, Jianguang – PersonEntity: Name: NameFull: Zhang, Jinyou – PersonEntity: Name: NameFull: Song, Zhaojie – PersonEntity: Name: NameFull: Xian, Chenggang – PersonEntity: Name: NameFull: Yang, Ying IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 03 Text: Mar2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 00084034 Numbering: – Type: volume Value: 104 – Type: issue Value: 3 Titles: – TitleFull: Canadian Journal of Chemical Engineering Type: main |
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