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Application of Low Pressure N2 Adsorption on Shale Nanoscale Pore Structure: Examples from the Permian Shanxi Formation of Transitional Facies Shale

Received: 15 August 2018     Accepted: 29 August 2018     Published: 12 October 2018
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Abstract

Shale gas resources in transitional facies are important unconventional energy sources. In order to understand the seepage characteristics of shale reservoir, low pressure nitrogen adsorption experiment were applied to investigate the nanoscale pore structure and adsorption fractal characteristics of shale in Shanxi Formation. FHH fractal model was adopted to calculate the absorption pore fractal dimension values D and quantitatively confirm the relationship between fractal dimension values and pore parameters. Results show that distribution curve obtained by the desorption branch present pore size distribution ranges from 1.14 nm to 173.39 nm, micropores and macropores developed and concentrated, no obvious dominant peak in the mesopores (2-25 nm) with relatively uniform distribution. Fractal dimension values range from 2.42 to 2.81, indicating shale pore structure is complex and heterogeneous. Fractal dimension is positively correlated with specific surface area and total pore volume, and highly negatively correlated with the average pore diameter. Fractal dimension is also a characterization of buried depth, and there is a weak positive correlation between them. With the increase of buried depth, fractal dimension has an increasing trend. The study provides a new method to further understand the shale nanometer pore structural heterogeneity.

Published in International Journal of Oil, Gas and Coal Engineering (Volume 6, Issue 6)
DOI 10.11648/j.ogce.20180606.12
Page(s) 134-141
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2018. Published by Science Publishing Group

Keywords

Low Pressure N2 Adsorption Isotherms, Nanoscale Pore, Adsorption Characteristics, FHH Fractal Model, Shanxi Formation Shale

References
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Cite This Article
  • APA Style

    Delu Xie, Suping Yao, Rongjie Hu, Biao Liu. (2018). Application of Low Pressure N2 Adsorption on Shale Nanoscale Pore Structure: Examples from the Permian Shanxi Formation of Transitional Facies Shale. International Journal of Oil, Gas and Coal Engineering, 6(6), 134-141. https://doi.org/10.11648/j.ogce.20180606.12

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    ACS Style

    Delu Xie; Suping Yao; Rongjie Hu; Biao Liu. Application of Low Pressure N2 Adsorption on Shale Nanoscale Pore Structure: Examples from the Permian Shanxi Formation of Transitional Facies Shale. Int. J. Oil Gas Coal Eng. 2018, 6(6), 134-141. doi: 10.11648/j.ogce.20180606.12

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    AMA Style

    Delu Xie, Suping Yao, Rongjie Hu, Biao Liu. Application of Low Pressure N2 Adsorption on Shale Nanoscale Pore Structure: Examples from the Permian Shanxi Formation of Transitional Facies Shale. Int J Oil Gas Coal Eng. 2018;6(6):134-141. doi: 10.11648/j.ogce.20180606.12

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  • @article{10.11648/j.ogce.20180606.12,
      author = {Delu Xie and Suping Yao and Rongjie Hu and Biao Liu},
      title = {Application of Low Pressure N2 Adsorption on Shale Nanoscale Pore Structure: Examples from the Permian Shanxi Formation of Transitional Facies Shale},
      journal = {International Journal of Oil, Gas and Coal Engineering},
      volume = {6},
      number = {6},
      pages = {134-141},
      doi = {10.11648/j.ogce.20180606.12},
      url = {https://doi.org/10.11648/j.ogce.20180606.12},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ogce.20180606.12},
      abstract = {Shale gas resources in transitional facies are important unconventional energy sources. In order to understand the seepage characteristics of shale reservoir, low pressure nitrogen adsorption experiment were applied to investigate the nanoscale pore structure and adsorption fractal characteristics of shale in Shanxi Formation. FHH fractal model was adopted to calculate the absorption pore fractal dimension values D and quantitatively confirm the relationship between fractal dimension values and pore parameters. Results show that distribution curve obtained by the desorption branch present pore size distribution ranges from 1.14 nm to 173.39 nm, micropores and macropores developed and concentrated, no obvious dominant peak in the mesopores (2-25 nm) with relatively uniform distribution. Fractal dimension values range from 2.42 to 2.81, indicating shale pore structure is complex and heterogeneous. Fractal dimension is positively correlated with specific surface area and total pore volume, and highly negatively correlated with the average pore diameter. Fractal dimension is also a characterization of buried depth, and there is a weak positive correlation between them. With the increase of buried depth, fractal dimension has an increasing trend. The study provides a new method to further understand the shale nanometer pore structural heterogeneity.},
     year = {2018}
    }
    

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  • TY  - JOUR
    T1  - Application of Low Pressure N2 Adsorption on Shale Nanoscale Pore Structure: Examples from the Permian Shanxi Formation of Transitional Facies Shale
    AU  - Delu Xie
    AU  - Suping Yao
    AU  - Rongjie Hu
    AU  - Biao Liu
    Y1  - 2018/10/12
    PY  - 2018
    N1  - https://doi.org/10.11648/j.ogce.20180606.12
    DO  - 10.11648/j.ogce.20180606.12
    T2  - International Journal of Oil, Gas and Coal Engineering
    JF  - International Journal of Oil, Gas and Coal Engineering
    JO  - International Journal of Oil, Gas and Coal Engineering
    SP  - 134
    EP  - 141
    PB  - Science Publishing Group
    SN  - 2376-7677
    UR  - https://doi.org/10.11648/j.ogce.20180606.12
    AB  - Shale gas resources in transitional facies are important unconventional energy sources. In order to understand the seepage characteristics of shale reservoir, low pressure nitrogen adsorption experiment were applied to investigate the nanoscale pore structure and adsorption fractal characteristics of shale in Shanxi Formation. FHH fractal model was adopted to calculate the absorption pore fractal dimension values D and quantitatively confirm the relationship between fractal dimension values and pore parameters. Results show that distribution curve obtained by the desorption branch present pore size distribution ranges from 1.14 nm to 173.39 nm, micropores and macropores developed and concentrated, no obvious dominant peak in the mesopores (2-25 nm) with relatively uniform distribution. Fractal dimension values range from 2.42 to 2.81, indicating shale pore structure is complex and heterogeneous. Fractal dimension is positively correlated with specific surface area and total pore volume, and highly negatively correlated with the average pore diameter. Fractal dimension is also a characterization of buried depth, and there is a weak positive correlation between them. With the increase of buried depth, fractal dimension has an increasing trend. The study provides a new method to further understand the shale nanometer pore structural heterogeneity.
    VL  - 6
    IS  - 6
    ER  - 

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Author Information
  • School of Earth Sciences and Engineering, Nanjing University, Nanjing, China

  • School of Earth Sciences and Engineering, Nanjing University, Nanjing, China

  • National Engineering Research Center of Coal Mine Water Hazard Controlling, Suzhou, China

  • School of Earth Sciences and Engineering, Nanjing University, Nanjing, China

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