PRODUCTION OF GAS FROM GAS HYDRATES Russian patent published in 2014 - IPC E21B43/16 E21B43/24 

FIELD: oil-and-gas industry.

SUBSTANCE: proposed method comprises development of non-equilibrium pressure and/or heat feed, and/or gas removal and that of formation fluid formed from hydrates, in gas hydrates occurrence zone. Note here that gas is cleaned and dried and fed to consumer. Besides, this process includes location of local heating source in well, if required. In compliance with this invention, decreased pressure are is created outside occurrence of gas hydrates, that is a phase separator with pressure of 0.3-0.5 of initial pressure in gas hydrate occurrence zone, and receiver with controlled valves. Extracted gas and formation fluid are forced into decreased pressure separator while heated dried gas is forced into gas hydrate occurrence zone. These jobs alternate to initiate heat pressure waves in gas hydrate occurrence zone rock to decrease local pressure therein.

EFFECT: higher efficiency.

6 cl, 1 ex, 1 dwg