Gas hydrate formation of sulfur dioxide by injection of liquid carbon dioxide into a natural layer saturated with methane and ice

4th International Scientific Conference "Arctic: History and Modernity"

生态环境科学;历史学

Khasanov, M.K.^1 ; Kildibaeva, S.R.^1

Sterlitamak Branch of Bashkir State University, Sterlitamak, Russia^1

关键词: Characteristic zones;    Hydrate formation;    Injected liquid;    Injection pressures;    Liquid carbon dioxide;    Pressure and temperature;    Temperature rise;    Thermobaric conditions;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/302/1/012053/pdf
DOI  :  10.1088/1755-1315/302/1/012053

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

A mathematical model of injection of liquid sulfur dioxide into a natural layer saturated with ice and methane, accompanied by the formation of SO2 gas hydrate on the front surface is presented. The case when the initial state of the system, as well as the pressure and temperature of the injected liquid sulfur dioxide correspond to the thermobaric conditions of the existence of sulfur dioxide gas hydrate is considered. That, the formation of sulfur dioxide gas hydrate occurs on the front surface, coinciding with the surface of methane displacement by sulfur dioxide. In this case, two characteristic zones are formed in the layer. In the first (near) zone the pores are saturated with sulfur dioxide and its gas hydrate, in the second (far) zone it is saturated with ice and methane. The dependences of the temperature and the coordinates of the formation border of sulfur dioxide gas hydrate on the injection pressure are explored. It is established that the injection pressure increase causes the rise in temperature and movement speed of the surface of the formation of sulfur dioxide gas hydrate. It is shown that at sufficiently high values of injection pressure and initial layer temperature, the temperature rises above the ice melting temperature at the formation border of sulfur dioxide gas hydrate. This corresponds to the formation of an intermediate region saturated with a mixture of water and methane. It is determined the dependence of the limit value of the sulfur dioxide injection pressure, above which an intermediate region saturated with a mixture of water and methane appears on the initial layer temperature.