It is known that the technology of developing gas hydrate fields with the usage of the replacement process is the most perspective from the point of view of process energy consumption (Xiao-Hui Wang, 2017, Oveckiy, 2016). The replacement process is extremely long. (Voronov, 2013). The replacement models for CO2/N2 injection into the CH4/HYDRATE system were studied in article of Kvamme (2015) and Lim (2017) et. t. The distinctive features of the study are the experimentation in the CO2/HYDRATE and CO2/N2/HYDRATE system at low pressures, as well as the use of substitution substances in the gaseous phase. The article presents experimental data on the simulation of the gas hydrate formation in a porous structure and the replacement of methane in hydrate by CO2. The results of gas amount calculations converted to hydrate are presented.
To date, there is a trend of humanity's transition to gas, as the main source of energy, as it once happened to coal and oil. Given the uneven distribution of natural gas deposits on the ground and the huge reserves of natural gas found in the gas hydrate form at the bottom of the world ocean and the permafrost zone (Macogon, 1970, Merey, 2016), which exceed are the natural gas reserves in the traditional form (Milkov, 2004, Kvenvolden, 1993, Chong 2016), there is a conditioned interest in these compounds at the present time.
Gas hydrates are guest inclusion compounds that are formed when guest molecules are trapped in host water lattices under certain thermo baric conditions. (Sloan 2008) In particular, hydrates of natural gas entice various hydrocarbons as guest molecules in cages formed by water molecules. The host water molecules build the cages with different sizes and shapes using the hydrogen bonds and the repulsions force of the guests molecules prop open these water cages via van der Waals interactions. (Sloan E. 2003)