Microscopic Pore Structure Characteristics and Genesis of Low Resistivity Reservoirs: A Case Study of the Wufeng and Longmaxi Formations in the Changning Area, Sichuan Basin.
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| Title: | Microscopic Pore Structure Characteristics and Genesis of Low Resistivity Reservoirs: A Case Study of the Wufeng and Longmaxi Formations in the Changning Area, Sichuan Basin. |
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| Authors: | Pei, Xiangyang1 (AUTHOR), Li, Xizhe1,2,3 (AUTHOR) lxz69@petrochina.com.cn, Guo, Wei1,2 (AUTHOR), Wu, Zhenkai1 (AUTHOR) wuzhenkai@petrochina.com.cn, Zhao, Shengxian4 (AUTHOR), Huang, Yize1 (AUTHOR), He, Sijie5 (AUTHOR), Bian, Yanan1 (AUTHOR), He, Weikang3 (AUTHOR) |
| Source: | Energy Science & Engineering. Dec2025, Vol. 13 Issue 12, p5910-5923. 14p. |
| Subject Terms: | *Shale gas, *Gas reservoirs, *Geological basins, *Organic geochemistry, *Geological formations, *Porosity |
| Geographic Terms: | Sichuan Sheng (China) |
| Abstract: | This study investigates the micro‐pore structure characteristics and genesis of low‐resistivity reservoirs in the Wufeng and Longmaxi Formation of the Sichuan Basin. A comprehensive analytical approach—combining core analysis, gas adsorption, high‐pressure mercury intrusion, and X‐ray photoelectron spectroscopy (XPS) was employed to systematically characterize the pore structure of low‐resistivity shale reservoirs and their relationship with electrical resistivity. The results reveal that low‐resistivity shale reservoirs typically exhibit smaller pore volume and specific surface area, along with a higher degree of organic matter graphitization. This organic matter graphitization process significantly reduces the rock's resistivity. Pore structure evolution is governed by both compaction and tectonic deformation, leading to macropore reduction and meso‐/micropore redistribution. Morphological transformations in organic matter pores—including pore collapse and wall contact—further facilitate electron migration and contribute to resistivity decline. By analyzing microstructural features of the Wufeng–Longmaxi shale, this study highlights the dominant influence of organic matter maturity, graphitization, and pore structure dynamics on resistivity, offering a theoretical framework for understanding the genesis and guiding exploration of low‐resistivity shale gas reservoirs. [ABSTRACT FROM AUTHOR] |
| Database: | Energy & Power Source |
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| Header | DbId: enr DbLabel: Energy & Power Source An: 190211794 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Microscopic Pore Structure Characteristics and Genesis of Low Resistivity Reservoirs: A Case Study of the Wufeng and Longmaxi Formations in the Changning Area, Sichuan Basin. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Pei%2C+Xiangyang%22">Pei, Xiangyang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Xizhe%22">Li, Xizhe</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<i> lxz69@petrochina.com.cn</i><br /><searchLink fieldCode="AR" term="%22Guo%2C+Wei%22">Guo, Wei</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wu%2C+Zhenkai%22">Wu, Zhenkai</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> wuzhenkai@petrochina.com.cn</i><br /><searchLink fieldCode="AR" term="%22Zhao%2C+Shengxian%22">Zhao, Shengxian</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Huang%2C+Yize%22">Huang, Yize</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22He%2C+Sijie%22">He, Sijie</searchLink><relatesTo>5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Bian%2C+Yanan%22">Bian, Yanan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22He%2C+Weikang%22">He, Weikang</searchLink><relatesTo>3</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Energy+Science+%26+Engineering%22">Energy Science & Engineering</searchLink>. Dec2025, Vol. 13 Issue 12, p5910-5923. 14p. – Name: Subject Label: Subject Terms Group: Su Data: *<searchLink fieldCode="DE" term="%22Shale+gas%22">Shale gas</searchLink><br />*<searchLink fieldCode="DE" term="%22Gas+reservoirs%22">Gas reservoirs</searchLink><br />*<searchLink fieldCode="DE" term="%22Geological+basins%22">Geological basins</searchLink><br />*<searchLink fieldCode="DE" term="%22Organic+geochemistry%22">Organic geochemistry</searchLink><br />*<searchLink fieldCode="DE" term="%22Geological+formations%22">Geological formations</searchLink><br />*<searchLink fieldCode="DE" term="%22Porosity%22">Porosity</searchLink> – Name: SubjectGeographic Label: Geographic Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Sichuan+Sheng+%28China%29%22">Sichuan Sheng (China)</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: This study investigates the micro‐pore structure characteristics and genesis of low‐resistivity reservoirs in the Wufeng and Longmaxi Formation of the Sichuan Basin. A comprehensive analytical approach—combining core analysis, gas adsorption, high‐pressure mercury intrusion, and X‐ray photoelectron spectroscopy (XPS) was employed to systematically characterize the pore structure of low‐resistivity shale reservoirs and their relationship with electrical resistivity. The results reveal that low‐resistivity shale reservoirs typically exhibit smaller pore volume and specific surface area, along with a higher degree of organic matter graphitization. This organic matter graphitization process significantly reduces the rock's resistivity. Pore structure evolution is governed by both compaction and tectonic deformation, leading to macropore reduction and meso‐/micropore redistribution. Morphological transformations in organic matter pores—including pore collapse and wall contact—further facilitate electron migration and contribute to resistivity decline. By analyzing microstructural features of the Wufeng–Longmaxi shale, this study highlights the dominant influence of organic matter maturity, graphitization, and pore structure dynamics on resistivity, offering a theoretical framework for understanding the genesis and guiding exploration of low‐resistivity shale gas reservoirs. [ABSTRACT FROM AUTHOR] |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=enr&AN=190211794 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1002/ese3.70267 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 14 StartPage: 5910 Subjects: – SubjectFull: Shale gas Type: general – SubjectFull: Gas reservoirs Type: general – SubjectFull: Geological basins Type: general – SubjectFull: Organic geochemistry Type: general – SubjectFull: Geological formations Type: general – SubjectFull: Porosity Type: general – SubjectFull: Sichuan Sheng (China) Type: general Titles: – TitleFull: Microscopic Pore Structure Characteristics and Genesis of Low Resistivity Reservoirs: A Case Study of the Wufeng and Longmaxi Formations in the Changning Area, Sichuan Basin. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Pei, Xiangyang – PersonEntity: Name: NameFull: Li, Xizhe – PersonEntity: Name: NameFull: Guo, Wei – PersonEntity: Name: NameFull: Wu, Zhenkai – PersonEntity: Name: NameFull: Zhao, Shengxian – PersonEntity: Name: NameFull: Huang, Yize – PersonEntity: Name: NameFull: He, Sijie – PersonEntity: Name: NameFull: Bian, Yanan – PersonEntity: Name: NameFull: He, Weikang IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 12 Text: Dec2025 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 20500505 Numbering: – Type: volume Value: 13 – Type: issue Value: 12 Titles: – TitleFull: Energy Science & Engineering Type: main |
| ResultId | 1 |
