A new integrated methodology of evaluating the change in the permeability of a fractured or pressure-sensitive porous reservoir based on analytical or numerical simulation of a fluid inflow to a well has been proposed. The analysis draws on results of well tests. Analytical solutions of direct and inverse problems allow an evaluation of the permeability variation with decreasing pressure. Numerical simulation of an unsteadystate fluid inflow to a well (a direct problem) allows determining the diagnostic signs of variation in the reservoir permeability from the dynamics of the bottom hole pressure and an assessment of the evaluations obtained from solving an inverse problem. The methodology has been approved using results of some well tests.
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Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 83, No. 2, pp. 235–247, March–April, 2010.
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Shchipanov, A.A. Pressure transient analysis of deformable reservoirs. J Eng Phys Thermophy 83, 250–262 (2010). https://doi.org/10.1007/s10891-010-0340-4
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DOI: https://doi.org/10.1007/s10891-010-0340-4