Abdullah N. Heat and mass transfer and hydrodynamics in gas-liquid dispersed media .

Gas hydrates are the only non-productive source of natural gas on Earth that can compete with traditional fields. Significant potential gas resources in hydrated deposits will provide humanity with highquality energy raw materials for a long time. The author analyzes the previous experience: - the mechanism of formation and decomposition of hydrates and it is established that the equilibrium parameters of formation and decomposition of hydrates in the slit space differ from the corresponding parameters in the free volume. The process of hydrate formation in the porous space is influenced by the composition of rocks, porosity, mineralization of formation water, curvature of the phase interface, which leads to hysteresis between the corresponding conditions and to their change relative to the conditions of hydrate formation in the free volume; - methods of formation and decomposition of hydrates in pipelines and it is established that for the formation of hydrates it is necessary that the partial pressure of water vapor over the hydrate was higher than the elasticity of these vapors in the hydrate. A laboratory setup was developed to determine the thermodynamic parameters of hydrate formation. With its help a number of field experiments were carried out at different initial parameters: the pressure was changed in the range from 0.1 to 0.6 MPa; the temperature varied from 273 to 278 K; the concentration of surfactants varied from 0 to 10 ml / liter; the time was varied from 30 minutes to 5 hours. An installation for measuring the gas capacity of a gas hydrate was developed. As a result of the experiment it was found that the gas capacity varies (under given conditions) from 0 to 80 m 3 / m 3 .