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Bimonthly, started in 1957
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Shanxi Provincial Education Department
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Taiyuan University of Technology
Publisher
Ed. Office of Journal of TYUT
Editor-in-Chief
SUN Hongbin
ISSN: 1007-9432
CN: 14-1220/N
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  • Analysis of Anisotropic Heat Transfer Properties of Oil Shale and Simulation of In-Situ Thermal Conduction Exploitation

    DOI:
    10.16355/j.tyut.1007-9432.20230683
    abstract:

    According to the anisotropic heat transfer differences of oil shale, the horizontal and vertical bedding heat transfer differences of Barkol oil shale in Xinjiang under different temperatures were investigated by means of laboratory test and numerical simulation. The experimental results show that: 1) With the increase of temperature, the heat conduction coefficient of each bedding direction shows a "decreasing" trend, but the heat conduction coefficient of parallel bedding direction is greater than that ofvertical bedding direction. 2) With the increase oftemperature, the specific heat capacity first increases and then decreases. When the temperature is 400, the specific heat capacity is the maximum. 3) Combined with the micro-CT image, with the increase of temperature, the influence of increasing cracks on the heat conduction in the vertical bedding direction is greater than that in the parallel bedding direction. Based on the above experimental parameters, the "heat-solid" coupling model of in-situ electric heating of oil shale reservoir is established by COMSOL software. The simulation results show that: With the

    increase of heating time, anisotropic heat transfer difference gradually begins to appear. When heating reaches 600d, the heat transfer area in parallel bedding direction is obviously larger than that in vertical bedding direction, showing an "ellipse" shape. When heating reaches 1440d, the heat transfer area increased slightly, the temperature of the oil recovery well P1 reached 550°C, and the pyrolysis of the shale in the heating well control area was basically completed.


    Keywords:
    oil shale;anisotropy;coefficient of heat conduction;micro-CT;numerical simulation

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