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    Evolution of Shale Microstructure under Microwave Irradiation Stimulation

    Access Status
    Fulltext not available
    Authors
    Hu, G.
    Sun, C.
    Huang, J.
    Xu, Guang
    Zhu, J.
    Date
    2018
    Type
    Journal Article
    
    Metadata
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    Citation
    Hu, G. and Sun, C. and Huang, J. and Xu, G. and Zhu, J. 2018. Evolution of Shale Microstructure under Microwave Irradiation Stimulation. Energy and Fuels. 32 (11): pp 11467–11476.
    Source Title
    Energy and Fuels
    DOI
    10.1021/acs.energyfuels.8b03299
    ISSN
    0887-0624
    School
    WASM: Minerals, Energy and Chemical Engineering (WASM-MECE)
    URI
    http://hdl.handle.net/20.500.11937/72969
    Collection
    • Curtin Research Publications
    Abstract

    As the low permeability of shale gas reservoirs limit its large-scale commercial development, the microwave irradiation stimulation is proposed as a new approach to increase the shale gas reservoir's production. In this study, in order to investigate the microwave's effect on shale pore structure, experiments were performed using nuclear magnetic resonance to compare the pore size distribution of shale samples before and after microwave treatment. The results showed that the numbers as well as sizes of mesopores and macropores in shale samples increased, while the number of micropores decreased after the microwave irradiation. This is benefit to enhance shale gas flow in reservoirs. In addition, the moisture within the shale samples increased its ability to absorb microwave energy, leading to a positive effect on the increase of breathable pores and microfractures. When the accompanying thermal stress and vapor pressure generated inside the shale is larger than the cementation strength between the shale mineral particles, the shale cracks and forms microcracks until it is destroyed. The experimental results demonstrated that the microwave stimulation is effective in expanding breathable pores and inducing fissures in shale samples; it may therefore have applications in enhancing shale gas reservoirs.

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