Numerical modeling of formation of a gas hydrate in a finite-length porous bed purged by a gas

Shagapov, V. Sh.; Хасанов, М. К.; Gimaltdinov, I. K.; Stolpovskii, M. V.

doi:10.1134/s0021894411040134

Cited by 21 publications

(6 citation statements)

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“…The system of Equations (23)- (29) with the boundary and initial conditions in Equation (30) was solved by the finite difference method. Table 1 [11,16,19,39,54]. Note that the temperature fields in a reservoir will largely depend on the porous reservoir material, since it affects the values of thermal conductivity and specific volumetric heat capacity.…”

Section: Description Of the Ch 4 -Co 2 Replacement Kinetics In The Hymentioning

confidence: 99%

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Mathematical Model of Carbon Dioxide Injection into a Porous Reservoir Saturated with Methane and Its Gas Hydrate

2020

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In this paper, the process of methane replacement in gas hydrate with carbon dioxide during CO2 injection into a porous medium is studied. A model that takes into account both the heat and mass transfer in a porous medium and the diffusion kinetics of the replacement process is constructed. The influences of the diffusion coefficient, the permeability and extent of a reservoir on the time of full gas replacement in the hydrate are analyzed. It was established that at high values of the diffusion coefficient in hydrate, low values of the reservoir permeability, and with the growth of the reservoir length, the process of the CH4-CO2 replacement in CH4 hydrate will take place in the frontal regime and be limited, generally, by the filtration mass transfer. Otherwise, the replacement will limited by the diffusion of gas in the hydrate.

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Section: Description Of the Ch 4 -Co 2 Replacement Kinetics In The Hymentioning

confidence: 99%

“…One of the methods of CO 2 utilization is its underground conservation in the gas hydrate state [15]. The numerical study of the processes of heat and mass transfer, accompanied by hydrate formation, when injecting gas into a porous reservoir, is carried out, for example, in [16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Mathematical Model of Carbon Dioxide Injection into a Porous Reservoir Saturated with Methane and Its Gas Hydrate

2020

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“…Mathematical models for formation and decomposition of gas hydrates when injecting the same gas which saturated the hydrate area in its initial state are considered in [9][10][11][12][13]. The papers [14,15] present a mathematical model for injection of liquid CO 2 into a porous medium saturated with CH 4 and its gas hydrate.…”

Section: _____________mentioning

confidence: 99%

Simulation of CH4 recovery from hydrate deposits by injection of CO2

et al. 2019

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The paper presents a mathematical model of CH 4 recovery from gas hydrate deposits via injection of liquid CO 2. The process of CH 4 recovery is supposed to occur on the moving frontal boundary separating the deposit into two domains. The near domain is saturated with liquid CO 2 and its hydrate while the far one is saturated with CH 4 and its hydrate. Self-similar solutions describing the temperature and pressure fields were obtained. The effect of main parameters on the dynamics of the process under study was explored. It was revealed that at low temperatures of the CO 2 being injected the temperature in the far domain did not exceed that of equilibrium for decomposition of CH 4 gas hydrate. It was also found that with increasing pressure at which CO 2 was injected into the gas hydrate domain, the extension of the region saturated with CO 2 hydrate was increasing.

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“…In particular, it is shown that there are three possible filtration modes in a porous medium, which differ qualitatively in the fields of temperature and hydrate saturation, namely: filtration without the formation of a gas hydrate in the porous medium; frontal mode of phase transitions; and the bulk mode of hydrate formation. In [21], the process of gas hydrate formation was considered in a porous reservoir of finite length. The numerical implementation of the mathematical model of the process under study presented in the work was carried out using the method of catching the front into a grid node.…”

Section: Introductionmentioning

confidence: 99%

“…In [22], a similar initial and boundary value problem was solved by the finite difference method using the iterative algorithm and the sweep method. However, in contrast to papers [19][20][21], a mathematical model was used, which took into account a greater number of the main physical features of the process under study: the real properties of the gas, the Joule-Thomson effect, and the joint movement of water and gas.…”

Section: Introductionmentioning

confidence: 99%

Solution of the Problem of Natural Gas Storages Creating in Gas Hydrate State in Porous Reservoirs

Мусакаев

Хасанов

2020

Mathematics

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Underground gas hydrate storage of natural gas is a rather promising way of creating underground storage facilities for hydrocarbon raw materials in porous reservoirs. This paper presents a solution to the problem of the formation of CH4 hydrate in a porous medium during the injection of methane into a reservoir at a temperature lower than the initial temperature of the reservoir. Self-similar solutions of the problem in axisymmetric approximation are given, describing the pressure and temperature distribution in separate reservoir regions at the formation of gas hydrate on the frontal surface. On the basis of the method of sequential change of stationary states, an analytical solution was obtained, which allowed us to determine the position of the methane hydrate formation boundary depending on different parameters for any moment of time. The limits of the applicability of the proposed model are also given. Thus, the analysis of the calculation results showed that the constructed solution allows one to sufficiently and accurately determine the values of parameters at the frontal surface for a highly permeable medium (k0 > 10−13 m2). It was proved that in the case of a highly permeable medium, the methane hydrate formation intensity will be limited by convective heat dissipation during hydrate formation.

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Numerical modeling of formation of a gas hydrate in a finite-length porous bed purged by a gas

Cited by 21 publications

References 1 publication

Mathematical Model of Carbon Dioxide Injection into a Porous Reservoir Saturated with Methane and Its Gas Hydrate

Mathematical Model of Carbon Dioxide Injection into a Porous Reservoir Saturated with Methane and Its Gas Hydrate

Simulation of CH4 recovery from hydrate deposits by injection of CO2

Solution of the Problem of Natural Gas Storages Creating in Gas Hydrate State in Porous Reservoirs

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