Mathematical Modelling

2008, No. 3

B.D. Ivanov

MATHEMATICAL MODELLING WATER-FREE RECOVERY OF GAS FROM GAS-GASHYDRATE STRATUM

In the paper the mathematical model of a new method of a gas-gashydrate stratum mining based on a gas desorption from a gas hydrate in preservation of a diphase equilibrium of a gashydrate-gas is investigated. At that there is no decomposition of a gas hydrate and by thus water from gashydrate is not allocated that is an important factor in a practice of recovery of natural gas. Equations of a filtration of a free gas phase in view of a gas desorption from a gashydrate in preservation of a diphase equilibrium gashydrate-gas are obtained. The numerical solution by mean of finite differences is obtained. Thus parameters of a gas-gashydrate stratum mining are obtained and their values are compared with values of these parameters, obtained from material and thermal balances. Co-incidence of results has appeared good, that prove about reliability and correctness of the obtained results.