Features of hydrate formation in porous formations during gas blowing

Theoretically, the processes of gas hydrate formation in gases saturated with gas and water porous media of finite length when they are blown with cold gas. The influence of initial parameters of the porous medium, as well as blowdown conditions on the features of the evolution of the hydration-saturation fields and temperature. It is shown that for some parameters of the injected gas, the boundary can be stopped phase transition.

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Prediction of Methane and Ethane Gas Hydrate Formation and Their Mixture in a Porous Medium

Archives of Industrial Engineering ◽

10.31829/2637-9252/aie2019-2(1)-109 ◽

2019 ◽

pp. 1-16

Keyword(s):

Porous Medium ◽

Porous Media ◽

Thermodynamic Modeling ◽

Gas Hydrate ◽

Pore Diameter ◽

Laboratory Data ◽

Hydrate Formation ◽

Equilibrium Temperature ◽

Formation Temperature ◽

Gas Hydrate Formation

The purpose of this paper is to study the thermodynamic modeling of the conditions for methane and ethane gas hydrate formation and their mixtures in a porous and non-porous environment. In this paper, the Van der Waals- Platteeuw thermodynamic model was used for prediction of gas hydrate formation conditions. Also, the SRK and PTV equations of state were used for calculations of driving force. In this research, the results of thermodynamic modeling in a porous were compared with the non-porous environment and laboratory data in the literature. Studies have shown that the results of the modeling are in good agreement with the laboratory data and the percentage of errors is low. The results also showed that with increasing pressure of porous and non-porous media, the equilibrium temperature increases. In addition, the effect of the pore diameter of porous media on the results of modeling was investigated for methane, ethane and their mixtures during gas hydrates formation. The results showed that by increasing the pressure for any size of the pore diameter of the porous medium, hydrate formation temperature increases. In addition, by increasing the pore diameter of the porous medium, hydrate formation temperature methane, ethane and their mixture increase at a constant pressure. The results also showed that the equilibrium temperature of the non-porous medium is higher than the equilibrium temperature of the non-porous medium. This shows that the hydrate formation in the porous medium has a deterrent effect and leads to lower temperatures and higher temperatures conditions for gas hydrate formation. The results showed that by increasing the percentage of methane in a porous or non-porous medium, the temperature of hydrate formation of the binary gas mixture of methane and ethane decreases.

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Mathematical modelling of injection gas hydrate formation into the massif of snow saturated the same gas

Proceedings of the Mavlyutov Institute of Mechanics ◽

10.21662/uim2016.2.034 ◽

2016 ◽

Vol 11 (2) ◽

pp. 233-239 ◽

Cited By ~ 2

Author(s):

V.Sh. Shagapov ◽

A.S. Chiglintseva ◽

S.V. Belova

Keyword(s):

Diffusion Coefficient ◽

Mathematical Modelling ◽

Gas Hydrate ◽

Hydrate Formation ◽

Influence Analysis ◽

Hydrate Layer ◽

Gas Hydrate Formation ◽

Hydrate Saturation ◽

The Given ◽

Cold Gas

Considered the problem of gas hydrate formation during injection of cold gas in the snow massif, initially saturated with the same gas. In work some limited scheme according to which, intensity of hydrate formation is limited by diffusion of gas through the hydrate layer formed between the phases of gas and ice, to the boundary of contact ice-hydrate, and is determined by the introduction of only one parameter the given diffusion coefficient. Shows the distributions of pressure, temperature, hydrate saturation and the saturation of the snow at different points in time. Held influence analysis of the effect of the pressure of the injected gas and the permeability of the snow massif on the intensity of hydrate formation.

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