Description of hydrodynamic and thermal fields at gas hydrate reservoir production

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


2015, Vol. 1. №3(3)

Description of hydrodynamic and thermal fields at gas hydrate reservoir production

About the authors:

Vladislav Sh. Shagapov, Dr. Sci. (Phys.-Math.), Professor, Chief Researcher, Mavlyutov Institute of Mechanics, Ufa Investigation Center of the Russian Academy of Sciences;

Angelina S. Chiglintseva, Associate Professor, Cand. Phys. and Math. Sci., Department of Higher Mathematics Birsk Branch of Bashkir State University
Alex A. Rusinov, Assistant, Department of Higher and Applied Mathematics, Birsk Branch of Bashkir State University


The paper presents the theoretical model and opportunity analysis of the gas production from gas hydrate reservoirs only by means of thermal reserves of both fields and surrounding rock formations. Since, according to the geologic data, the field radii are typically within the order of ten kilometers, and the field thickness — several tens of meters, in this paper we consider a hypothetical homogeneous reservoir in the form of a pancake with characteristic linear dimensions corresponding to the real fields. It is expected that the gas hydrate reservoir is partially saturated with gas hydrates and free gas. It is revealed that the rate of decline of hydrate saturation in the period of field deactivation is much lower than in the period of gas extraction. The influence of the formation thickness on the development of the gas hydrate reservoir is studied. For the reservoirs with the thickness of several tens of meters, the minimum time of field exploitation required for the complete decomposition of hydrates is observed in cyclic operation, when the regime of gas extraction alternates the following field deactivation.


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