FIELD: oil and gas production.
SUBSTANCE: group of inventions in the form of method versions is related to gas production from gas hydrates. More precisely, inventions consist in provision of effect at formation containing gas hydrate by warm water from water-bearing bed with release of bound gas. Method comprises the following stages: creation of well shaft passing through deposit of gas hydrate into liquid source; transfer of liquid from liquid source into gas hydrate deposit; contact of gas hydrate deposit with liquid from liquid source for production of gas; after production of gas introduction of mixture of carbon dioxide in supercritical state and water capable of gas hydrate production into deposit of gas hydrate, to stabilise deposit of gas hydrate. According to other versions, method provides for equipment of well shaft with insulation device, which is located lower or higher than gas hydrate deposit.
EFFECT: provides for higher efficiency of method due to possibility to stabilise gas hydrate deposit after gas production.
18 cl, 3 dwg
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