Effect of the Heterogeneity of Coal on Its Seepage Anisotropy: A Micro Conceptual Model.
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| Title: | Effect of the Heterogeneity of Coal on Its Seepage Anisotropy: A Micro Conceptual Model. |
|---|---|
| Authors: | Chen, Xiuling1,2 (AUTHOR) 2401008@stu.neu.edu.cn, Cui, Guanglei1,2 (AUTHOR) 2371109@stu.neu.edu.cn, Luo, Jiaming1,2 (AUTHOR), Wang, Chunguang3 (AUTHOR) cuiguanglei@mail.neu.edu.cn, Zhang, Jian4 (AUTHOR) zhangj614@163.com |
| Source: | Energies (19961073). Dec2024, Vol. 17 Issue 24, p6484. 24p. |
| Subjects: | Compound fractures, Gas injection, Permeability, Diffusion coefficients, Conceptual models, Coalbed methane |
| Abstract: | Coal is a typical dual-porosity structural material. The injection of CO2 into coal seams has been shown to be an effective method for storing greenhouse gasses and extracting coal bed methane. In light of the theory of dual-porosity media, we investigate the impact of non-homogeneity on seepage anisotropy and examine the influence of CO2 gas injection on the anisotropy of coal and the permeability of fractures. The results demonstrate that under constant pressure conditions, coal rock has the greatest permeability variation in the direction of face cleats and the smallest changes in the direction of vertical bedding. The more pronounced the heterogeneity, the more evident the change in permeability and the less pronounced the decreasing stage of permeability. Additionally, the larger the diffusion coefficient is, the less pronounced the permeability change. The change in permeability is inversely proportional to the size of the adsorption constant and directly proportional to the size of the fracture. As the matrix block size increases, the permeability also increases, whereas the decrease in permeability becomes less pronounced. The findings of this study offer a theoretical basis for further research into methods for enhancing the CO2 sequestration rate. [ABSTRACT FROM AUTHOR] |
| Copyright of Energies (19961073) is the property of MDPI 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: 181915227 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Effect of the Heterogeneity of Coal on Its Seepage Anisotropy: A Micro Conceptual Model. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Chen%2C+Xiuling%22">Chen, Xiuling</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> 2401008@stu.neu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Cui%2C+Guanglei%22">Cui, Guanglei</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> 2371109@stu.neu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Luo%2C+Jiaming%22">Luo, Jiaming</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Chunguang%22">Wang, Chunguang</searchLink><relatesTo>3</relatesTo> (AUTHOR)<i> cuiguanglei@mail.neu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Zhang%2C+Jian%22">Zhang, Jian</searchLink><relatesTo>4</relatesTo> (AUTHOR)<i> zhangj614@163.com</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Energies+%2819961073%29%22">Energies (19961073)</searchLink>. Dec2024, Vol. 17 Issue 24, p6484. 24p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Compound+fractures%22">Compound fractures</searchLink><br /><searchLink fieldCode="DE" term="%22Gas+injection%22">Gas injection</searchLink><br /><searchLink fieldCode="DE" term="%22Permeability%22">Permeability</searchLink><br /><searchLink fieldCode="DE" term="%22Diffusion+coefficients%22">Diffusion coefficients</searchLink><br /><searchLink fieldCode="DE" term="%22Conceptual+models%22">Conceptual models</searchLink><br /><searchLink fieldCode="DE" term="%22Coalbed+methane%22">Coalbed methane</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Coal is a typical dual-porosity structural material. The injection of CO2 into coal seams has been shown to be an effective method for storing greenhouse gasses and extracting coal bed methane. In light of the theory of dual-porosity media, we investigate the impact of non-homogeneity on seepage anisotropy and examine the influence of CO2 gas injection on the anisotropy of coal and the permeability of fractures. The results demonstrate that under constant pressure conditions, coal rock has the greatest permeability variation in the direction of face cleats and the smallest changes in the direction of vertical bedding. The more pronounced the heterogeneity, the more evident the change in permeability and the less pronounced the decreasing stage of permeability. Additionally, the larger the diffusion coefficient is, the less pronounced the permeability change. The change in permeability is inversely proportional to the size of the adsorption constant and directly proportional to the size of the fracture. As the matrix block size increases, the permeability also increases, whereas the decrease in permeability becomes less pronounced. The findings of this study offer a theoretical basis for further research into methods for enhancing the CO2 sequestration rate. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Energies (19961073) is the property of MDPI 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: 10.3390/en17246484 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 24 StartPage: 6484 Subjects: – SubjectFull: Compound fractures Type: general – SubjectFull: Gas injection Type: general – SubjectFull: Permeability Type: general – SubjectFull: Diffusion coefficients Type: general – SubjectFull: Conceptual models Type: general – SubjectFull: Coalbed methane Type: general Titles: – TitleFull: Effect of the Heterogeneity of Coal on Its Seepage Anisotropy: A Micro Conceptual Model. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Chen, Xiuling – PersonEntity: Name: NameFull: Cui, Guanglei – PersonEntity: Name: NameFull: Luo, Jiaming – PersonEntity: Name: NameFull: Wang, Chunguang – PersonEntity: Name: NameFull: Zhang, Jian IsPartOfRelationships: – BibEntity: Dates: – D: 15 M: 12 Text: Dec2024 Type: published Y: 2024 Identifiers: – Type: issn-print Value: 19961073 Numbering: – Type: volume Value: 17 – Type: issue Value: 24 Titles: – TitleFull: Energies (19961073) Type: main |
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