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Journal of Applied Mechanics and Technical Physics

2015 year, number 5

GAS FILTRATION FROM AN UNDERGROUND RESERVOIR AT A LARGE INITIAL PRESSURE GRADIENT

T. P. Miroshnichenko1, N. A. Lutsenko1,2, V. A. Levin1,2
1Far Eastern Federal University, Vladivostok, 690950 Russia
taisia.miroshnichenko@gmail.com
2Institute of Automation and Control Processes, Far Eastern Branch, Russian Academy of Sciences, Vladivostok, 690041 Russia
nickl@inbox.ru
Keywords: фильтрация газа, взрыв газа, бародиффузия, gas filtration, gas explosion, barodiffusion

Abstract

Gas filtration from an underground reservoir through a layer of a porous medium due to an instantaneous increase in the gas pressure in the reservoir is studied. The problem is considered in a one-dimensional formulation in the general case where the temperatures of the gas and the porous medium are different and unstable, and in the case of a high specific heat of the solid phase and a high interfacial heat-transfer rate. The dynamics of the gas flow at the inlet and outlet of the underground reservoir is analyzed, the time of unloading of the system is estimated as a function of the permeability of the porous medium. It is shown that, depending on the properties of the porous layer, two characteristic gas flow regimes are possible: a fast discharge regime and a slow regime which is determined mainly by barodiffusion.