FIELD: oil and gas production.
SUBSTANCE: gas hydrate and releasing agent are brought into contact; further releasing agent and hydrocarbon in gas hydrate are exchanged producing hydrate of releasing agent and released hydrocarbon. Also temperature or pressure of gas hydrate is not raised for more, than 10% at the above said stages. According to one of the methods released hydrocarbon can be extracted from an underground channel. According to another method releasing agent can be insulated in underground beds, i.e. sequestered. Carbon dioxide, nitrous oxide or mixture of carbon dioxide with nitrous oxide, nitrogen, helium, neon or their combinations can be accepted as releasing agent. Methane can be accepted as released hydrocarbon.
EFFECT: increased efficiency of methods.
16 cl, 2 dwg
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