Mathematical modeling of some features of gas hydrates dissociation
https://doi.org/10.20914/2310-1202-2018-2-313-322
Abstract
In the modern oil and gas industry, specialists often have to solve multifaceted problems associated with processes of dissociation of technogenic and natural gas hydrates. Known methods of calculation and dissociation studies mainly describe this process with the supply to heat hydrate. However, when using the method of pressure reduction for dissociation, hydrate metastability states are manifested - self-preservation and conservation effects, discovered by Russian and foreign researchers. Available in the literature descriptions of the effects of metastability were obtained as a result of experiments with hydrates from one-component gases and for specific thermobaric conditions. The existing dependencies for some hydrate systems do not apply to others, so that their direct application in solving practical problems, for example, with the extraction of natural gas or the elimination of man-made hydrates in a wide range of thermobaric conditions, is difficult. Therefore, the creation of a method for calculating the main parameters of the dissociation of hydrates from multicomponent gases is relevant. The article presents the developed physico-mathematical model of the features of hydrate dissociation process under isothermal pressure decrease of its environment. With the help of these models, the parameters of the hydrate dissociation process, including manifestations of their metastability states, are calculated. The mathematical dependencies connecting the parameters of the hydration dissociation process with the current parameters of the medium, as well as with the thermobaric conditions of the process of their formation (i.e. with their "history") can be used to solve practical problems of ensuring reliability and continuity of functioning systems of oil and gas industry. In addition, the obtained dependences can be used to develop promising reserves of hydrocarbons that are in the hydrate state in the depths and bottom sediments of the continental shelves, as well as to intensify oil and gas production using hydrate technologies.
About the Authors
E. P. Zaporozhets
Kuban State Technological University
Russian Federation
Dr. Sci. (Engin.), professor, department of oil and gas business named after Professor G.T. Vartumyan, Moscowskaya str., 2 Krasnodar, 350051, Russia
Russian Federation
Dr. Sci. (Engin.), professor, department of oil and gas business named after Professor G.T. Vartumyan, Moscowskaya str., 2 Krasnodar, 350051, Russia
N. A. Shostak
Kuban State Technological University
Cand. Sci. (Engin.), associate professor, department of oil and gas business named after Professor G.T. Vartumyan, Moscowskaya str., 2 Krasnodar, 350051, Russia
Cand. Sci. (Engin.), associate professor, department of oil and gas business named after Professor G.T. Vartumyan, Moscowskaya str., 2 Krasnodar, 350051, Russia
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Review
For citations:
Zaporozhets E.P., Shostak N.A. Mathematical modeling of some features of gas hydrates dissociation. Proceedings of the Voronezh State University of Engineering Technologies. 2018;80(2):313-322. (In Russ.) https://doi.org/10.20914/2310-1202-2018-2-313-322
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