Release:2015, Vol. 1. №3(3)
About the authors:Vladislav Sh. Shagapov, Dr. Phys. and Math. Sci., Leading Researcher, Institute of Mechanics, Ufa Scientific Center of the Russian Academy of Sciences
Abstract: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.
1. Darovskih S. V., Krohalev I. V., Muljavin S. F. Promyslovo–geologicheskie osobennosti Messojahskogo gazogidratnogo mestorozhdenija [Production and Geological Characteristics of Messoyakhskiy Gas Hydrate Field] // Vestnik Nedropol'zovatelja HMAO [Herald of Subsurface User of Khanty-Mansiysk Autonomous Okrug]. 2007.
No 18. Pp. 47-53. (In Russian)
2. Dmitrievskij A. N., Balanjuk I. E. Gazogidraty morej i okeanov — istochniki uglevodorodov budushhego [Gas-hydrates of Seas and Oceans — Future Sources of Hydrocarbons]. M.: Gazprom, 2009. 416 p. (In Russian)
3. Makogon Ju. F. Gidraty prirodnyh gazov [Natural Gas Hydrates]. M.: Nedra, 1974. 208 p. (In Russian)
4. Makogon Ju. F., Omel'chenko R. Ju. Messojaha — gazogidratnaja zalezh', rol' i znachenie [Messoyakha — Gashydrate Deposit, Role and Value] // Geologija i poleznye iskopaemye Mirovogo okeana [Geology and Mineral Resources of the World Ocean]. 2012. No 3. Pp. 5-19. (In Russian)
5. Nigmatulin R. I. Dinamika mnogofaznyh sred [Dynamics of Multiphase Media. Vol. 1]. M.: Nauka [Science], 1987. T. 1. 464 p. (In Russian)
6. Suhonosenko A. L. Termogidrodinamicheskoe modelirovanie processov razrabotki gazogidratnyh mestorozhdenij: diss. kand. tehn. nauk [Thermohydrodynamic Modeling of the Development of Gas Hydrate Deposits: Diss. Cand. Sci. (Engin.)]. M., 2013. 145 p. (In Russian)
7. Shagapov V. Sh., Chiglinceva A. S., Syrtlanov V. R. O vozmozhnosti vymyvanija gaza iz gazogidratnogo massiva posredstvom cirkuljacii teploj vody [On the Possibility of Washing of Gas from Gas Hydrate solid by Circulating Warm Water] // Prikladnaja mehanika i tehnicheskaja fizika [Applied Mechanics and Technical Physics]. 2009. Vol. 50. No 4. Pp. 100-111. (In Russian)
8. Grover T., Moridis G., Holditch S. Analysis of reservoir performance of Messoyakha Gas hydrate Field // Proceedings of the Eighteenth International Offshore and Polar Engineering Conference Vancouver, BC, Canada (July 6-11, 2008). Pp. 49-56.
9. Moridis G. J. Depressurization-Induced Gas Production from Class 1 Hydrate Deposits // SPE 97266, presented at SPE ATCE. Dallas, 2005.
10. Sloan E.D., Koh C.A. Clathrate hydrates of natural gases. 3rd cd. CRC Press, Taylor & Francis group, 2008. 119 p.