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Determining kinetic parameters of a block coal bed gas by solving inverse problem based on data of borehole gas measurements

  • Geomechanics
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Journal of Mining Science Aims and scope

Abstract

In the framework of the developed and implemented nonlinear geomechanical model of a coal bed having block structure, describing gas inflow, the authors propose the method for quantitative estimate of gas content as well as diffusion and mass exchange coefficients based on solution of inverse problems using pressure measurements taken in shut-in borehole in the “pressure drop” mode. Besides the main function, the set problem had an auxiliary objective function with the less number of arguments. Numerical experiments with synthetic input data yield that the auxiliary objective function has a number of local minimums. The authors also put forward a technique of finding global minimum that provides the set problem solution.

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Authors and Affiliations

  1. Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Krasnyi pr. 54, Novosibirsk, 630091, Russia

    L. A. Nazarova

  2. Sobolev Institute of Mathematics, Siberian Branch, Russian Academy of Sciences, pr. Akademika Koptyuga 4, Novosibirsk, 630090, Russia

    L. A. Nazarov & A. L. Karchevsky

  3. Laboratoire Navier (UMR 8205), CNRS, ENPC, IFSTTAR, Université Paris-Est, F-77455, Marne-la-Vallee, France

    M. Vandamme

Authors
  1. L. A. Nazarova
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  2. L. A. Nazarov
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  3. A. L. Karchevsky
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  4. M. Vandamme
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Correspondence to L. A. Nazarova.

Additional information

Original Russian Text © L.A. Nazarova, L.A. Nazarov, A.L. Karchevsky, M. Vandamme, 2015, published in Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, 2015, No. 4, pp. 34–41.

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Nazarova, L.A., Nazarov, L.A., Karchevsky, A.L. et al. Determining kinetic parameters of a block coal bed gas by solving inverse problem based on data of borehole gas measurements. J Min Sci 51, 666–672 (2015). https://doi.org/10.1134/S1062739115040027

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  • DOI: https://doi.org/10.1134/S1062739115040027

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