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The Products Formation and Flow During Underground Thermal Decomposition of Oil Shale

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Shale is sedimentary rock formed by the accumulation of pelagic sediments, minerals and their further transformation. The pyrolysis of oil shale can yield liquid hydrocarbons and a combustible gas that can be used as energy sources. There are various methods of oil shale thermal processing. However, methods that do not require the extraction of rock to the surface (in situ methods) are of special interest. A mathematical model of in situ oil shale heating and decomposition is presented. In comparison with known papers, new model describes processes under “non-equilibrium” conditions, when gas pressure in pores is determined by temperature and composition change. Model also allows describing the flow of the reacting mixture forming product in the presence of a production well and can be used to determine the technological parameters of the well and the heating process that provide maximum valuable product extraction rate.

Article Highlights

  • Temperature distribution in oil shale under heat source forming by high-frequency electromagnetic field is studied.

  • The distributions of motion velocity and concentrations were analyzed.

  • The model shows describing the flow of decomposition product in the presence of a production well.

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The work was performed according to the Government research assignment for ISPMS SB RAS, project FWRW-2022-0003.

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Correspondence to A. L. Maslov.

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Knyazeva, A.G., Maslov, A.L. The Products Formation and Flow During Underground Thermal Decomposition of Oil Shale. Transp Porous Med 147, 157–168 (2023).

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