Theoretical research of the gas hydrate deposits development using the injection of carbon dioxide

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

“…We used the approximate analytical solutions presented in [31] to test the mathematical model. In [31], approximate analytical solutions were obtained for the problem of decomposition of methane gas hydrate during the injection of gaseous CO 2 into a gas-hydrated formation based on the method of converting to a self-similar variable. Figure 3 presents the dependence of the coordinates of the hydrate substitution boundary in time.…”

“…At present, there are only a few works on the mathematical modeling of the methane replacement processes with carbon dioxide taking into account heat and mass transfer in the reservoir. Thus, the mathematical models of the replacement of CH 4 by CO 2 when carbon dioxide is injected into the gas hydrate reservoir are presented in [30,31]. However, these studies do not take into account the diffusion kinetics of the substitution process.…”

Numerical study of the process of injection carbon dioxide into a porous formation saturated with methane and its hydrate

“…Therefore, the conditions for the conservation of masses of gases and water on it have the form [5,6]: …”

“…To solve such a system, the method of catching the front in a spatial mesh node was used [5,6], in combination with the sweep algorithm and the iteration method.…”

“…It is shown that the proportion of methane substituted in this way from the hydrate composition can make up to 70% [2,3]. Theoretical models of injecting CO 2 into methane hydrate formations are examined in [5,6]. In this paper, we present a mathematical model of the substitution of CH 4 for CO 2 in the methane hydrate formation during the carbon dioxide injection, taking into account the finite extent of the formation, the real gas properties, the Joule-Thomson effect, and the adiabatic expansion of the gas.…”