P561 ABOUT NATURE AND STRATUM OCCURRENCES OF GAS-HYDRATES HYDROCARBON GASES IN THE CASPIAN SEA 1 Hydrocarbon composition's gas-hydrates is formed mainly in cryosphere and bottom sediments of the seas and oceans. The recent thermodynamic conditions of a sedimental cover of the earth crust as have shown researches are favorable for formation and preservation of solid gas-hydrates approximately on the 25% of territory of a land and 90% of the World ocean water area where thickness of gas-hydrates zone of formation can reach several thousands meters. A special interest represent mediterranean seas characterizing by a thick sedimentary series and high oil-gas


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