IDEAS home Printed from https://ideas.repec.org/a/gam/jeners/v12y2019i24p4743-d297250.html
   My bibliography  Save this article

Insights into Multifractal Characterization of Coals by Mercury Intrusion Porosimetry

Author

Listed:
  • Sijian Zheng

    (School of Energy Resource, China University of Geosciences, Beijing 100083, China
    Coal Reservoir Laboratory of National Engineering Research Center of CBM Development & Utilization, China University of Geosciences, Beijing 100083, China
    Beijing Key Laboratory of Unconventional Natural Gas Geological Evaluation and Development Engineering, Beijing 100083, China)

  • Yanbin Yao

    (School of Energy Resource, China University of Geosciences, Beijing 100083, China
    Coal Reservoir Laboratory of National Engineering Research Center of CBM Development & Utilization, China University of Geosciences, Beijing 100083, China)

  • Shasha Zhang

    (College of Chemistry, Nankai University, Tianjin 300071, China)

  • Yong Liu

    (School of Energy Resource, China University of Geosciences, Beijing 100083, China
    Coal Reservoir Laboratory of National Engineering Research Center of CBM Development & Utilization, China University of Geosciences, Beijing 100083, China)

  • Jinhui Yang

    (Beijing Oil and Gas Pipeline Control Center, Beijing 100083, China)

Abstract

Mercury intrusion porosimetry (MIP) as a practical and effective measurement has been widely used in characterizing the pore size distribution (PSD) for unconventional reservoirs (e.g., coals and shales). However, in the process of MIP experiments, the high mercury intrusion pressure may cause matrix compressibility and result in inaccurate estimations of PSD. To get a deeper understanding of the variability and heterogeneity characteristics of the actual PSD in coals, this study firstly corrected the high mercury intrusion pressure data in combination with low-temperature N 2 adsorption (LTNA) data. The results show that the matrix compressibility was obvious under the pressure over 24.75 MPa, and the calculated matrix compressibility coefficients of bituminous and anthracite coals range from 0.82 to 2.47 × 10 −10 m 2 /N. Then, multifractal analysis was introduced to evaluate the heterogeneity characteristics of coals based on the corrected MIP data. The multifractal dimension D min is positively correlated with vitrinite content, but negatively correlated with inertinite content and mercury intrusion saturation. The multifractal dimension D max shows negative relationships with moisture and ash content, and it also emerges as a “U-shaped” trend with efficiency of mercury withdrawal. It is concluded that multifractal analysis can be served as a practical method not only for evaluating the heterogeneity of coal PSDs, but also for other unconventional reservoirs (e.g., shale and tight sandstone).

Suggested Citation

  • Sijian Zheng & Yanbin Yao & Shasha Zhang & Yong Liu & Jinhui Yang, 2019. "Insights into Multifractal Characterization of Coals by Mercury Intrusion Porosimetry," Energies, MDPI, vol. 12(24), pages 1-18, December.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:24:p:4743-:d:297250
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1996-1073/12/24/4743/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/1996-1073/12/24/4743/
    Download Restriction: no
    ---><---

    References listed on IDEAS

    as
    1. Mateusz Kudasik & Norbert Skoczylas & Anna Pajdak, 2017. "The Repeatability of Sorption Processes Occurring in the Coal-Methane System during Multiple Measurement Series," Energies, MDPI, vol. 10(5), pages 1-15, May.
    Full references (including those not matched with items on IDEAS)

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Yabin Gao & Jing Cao & Shaoqi Zhang & Ziwen Li, 2023. "Analysis of the Pore Structure and Fractal Characteristics of Coal and Gas Outburst Coal Seams Based on Matrix Compression Correction," Sustainability, MDPI, vol. 15(17), pages 1-15, August.

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Katarzyna Godyń & Barbara Dutka & Monika Chuchro & Mariusz Młynarczuk, 2020. "Synergy of Parameters Determining the Optimal Properties of Coal as a Natural Sorbent," Energies, MDPI, vol. 13(8), pages 1-17, April.
    2. Skoczylas Norbert & Anna Pajdak & Katarzyna Kozieł & Leticia Teixeira Palla Braga, 2019. "Methane Emission during Gas and Rock Outburst on the Basis of the Unipore Model," Energies, MDPI, vol. 12(10), pages 1-22, May.
    3. Paweł Baran & Katarzyna Czerw & Bogdan Samojeden & Natalia Czuma & Katarzyna Zarębska, 2018. "The Influence of Temperature on the Expansion of a Hard Coal-Gas System," Energies, MDPI, vol. 11(10), pages 1-10, October.
    4. Norbert Skoczylas & Anna Pajdak & Mariusz Młynarczuk, 2019. "CO 2 Adsorption–Desorption Kinetics from the Plane Sheet of Hard Coal and Associated Shrinkage of the Material," Energies, MDPI, vol. 12(20), pages 1-20, October.
    5. Sijian Zheng & Shuxun Sang & Shiqi Liu & Xin Jin & Meng Wang & Shijian Lu & Guangjun Feng & Yi Yang & Jun Hou, 2022. "An NMR-Based Method for Multiphase Methane Characterization in Coals," Energies, MDPI, vol. 15(4), pages 1-15, February.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:gam:jeners:v:12:y:2019:i:24:p:4743-:d:297250. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.