
We introduce the mathematical model and study the process peculiarities of gas hydrate formation at the injection of carbon dioxide into the porous medium initially saturated with methane and its hydrate. Self-similar solutions of the axisymmetric problem that describe the distribution of main parameters in the reservoir are obtained. It is shown that there are solutions, according to which the process can occur without dissociation of the source gas hydrate into methane and water, as well as with dissociation. The critical diagrams of solution existence for each type are built.
В статье представлена математическая модель и исследование особенностей процесса образования газового гидрата при нагнетании углекислого газа в пористую среду, насыщенную в исходном состоянии метаном и его гидратом. Построены автомодельные решения осесимметричной задачи, описывающие распределения основных параметров в пласте. Показано, что существуют решения, согласно которым процесс может происходить как без диссоциации исходного газогидрата на метан и воду, так и с ней. Построены критические диаграммы существования решений каждого типа.
пas hydrates, автомодельное решение, axisymmetrical formulation, диссоциация, carbon dioxide, осесимметричная постановка, porous medium, газовый гидрат, self-similar solution, dissociation, диоксид углерода, exchange process, процесс замещения, пористая среда
пas hydrates, автомодельное решение, axisymmetrical formulation, диссоциация, carbon dioxide, осесимметричная постановка, porous medium, газовый гидрат, self-similar solution, dissociation, диоксид углерода, exchange process, процесс замещения, пористая среда
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