Mathematical modeling of gas extraction from a gas-hydrate reservoir with account of the ice formation

Tyumen State University Herald. Physical and Mathematical Modeling. Oil, Gas, Energy


Release:

Releases Archive. Вестник ТюмГУ. Физико-математические науки. Информатика (№7, 2014)

Title: 
Mathematical modeling of gas extraction from a gas-hydrate reservoir with account of the ice formation


About the authors:

Nail G. Musakaev, Dr. Sci. (Phys.-Math.), Chief Researcher, Tyumen Branch of Khristianovich Institute of Theoretical and Applied Mechanics of the Siberian Branch of the Russian Academy of Sciences; Professor, University of Tyumen; musakaev@ikz.ru

Marat K. Khasanov, Cand. Sci. (Phys.-Math.), Associate Professor, Department of Applied Informatics and Programming, Sterlitamak Branch of Bashkir State University; hasanovmk@mail.ru

Abstract:

It has been conducted a theoretical study of the features of gas hydrates decomposition to gas and ice during gas extraction from a gas-hydrate reservoir which is saturated with gas and gas hydrate in the initial state. Self-similar solutions of this problem in the axial-symmetric formulation are derived. These solutions are describing distributions of the main parameters in the reservoir. The condition of formation of the phase transitions extended zone was obtained. The critical values of the mass flow rate of gas extraction, at which the extended zone occurs, were defined. It has been determined that the frontal mode of the gas hydrate dissociation is realized in the porous medium with high permeability and in the reservoirs with low initial temperature.

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