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    Molecular insight on competitive adsorption and diffusion characteristics of shale gas in water-bearing channels

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    Name:
    molecular insight.pdf
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    792.3Kb
    Format:
    PDF
    Description:
    Accepted manuscript
    Embargo End Date:
    2022-06-20
    Download
    Type
    Article
    Authors
    Gong, Liang cc
    Shi, Ji Hong
    Ding, Bin cc
    Huang, Zhao Qin
    Sun, Shuyu cc
    Yao, Jun
    KAUST Department
    Computational Transport Phenomena Lab
    Earth Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Date
    2020-06-20
    Online Publication Date
    2020-06-20
    Print Publication Date
    2020-10
    Embargo End Date
    2022-06-20
    Submitted Date
    2020-01-26
    Permanent link to this record
    http://hdl.handle.net/10754/663851
    
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    Abstract
    The shale gas adsorption and flow characteristics play essential roles in improving shale gas recovery. Motivated by the desire to clarify these characteristics carefully and precisely, a series of shale models with different water contents from 0.6 to 2.4 wt% were established. Presumably, these characteristics were sought to pin down answers by using the grand canonical Monte Carlo (GCMC) and molecular dynamics (MD) methods respectively. Importantly, the analysis of the pore structure of these models is firstly taken into account considering its microstructure to meet the demand for the explanation of the adsorption characteristics of methane. The results showed that the enterable volumes decrease significantly with the increase of water content due to the diffusion and aggregation of water molecules in the middle of enterable pores. Intuitively, it could lead to a marked linear decrease in the adsorption amount of methane from 1.2 mmol/g to 0.6 mmol/g. A curiosity of this study is that the diffusion coefficients of methane increase as the increase of temperature and ensuring the low pressure outside the channel could boost the flux of methane intriguingly. Suffice to say, the optimum development shale gas conditions in this work are at the temperature of 358 K and in the presence of water content of 2.4 wt%. Hence, there is an expectation that this study would provide a guidance for the exploitation of shale gas in the presence of water.
    Citation
    Gong, L., Shi, J.-H., Ding, B., Huang, Z.-Q., Sun, S.-Y., & Yao, J. (2020). Molecular insight on competitive adsorption and diffusion characteristics of shale gas in water-bearing channels. Fuel, 278, 118406. doi:10.1016/j.fuel.2020.118406
    Sponsors
    The authors gratefully acknowledge the financial support from the National Natural Science Foundation of China (No. 51936001 and No. 51676208) and the Fundamental Research Funds for the Central Universities (No. 18CX07012A and 19CX05002A).
    Publisher
    Elsevier BV
    Journal
    Fuel
    DOI
    10.1016/j.fuel.2020.118406
    Additional Links
    https://linkinghub.elsevier.com/retrieve/pii/S0016236120314022
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.fuel.2020.118406
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Earth Science and Engineering Program; Computational Transport Phenomena Lab

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