Physicochemical Possibility Zonation For Methane Hydrates In Caspian Sea | 18472
Journal of Marine Science: Research & Development
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Gas hydrate has been suggested as a potential source for future energy, a trigger for global climate changes and geohazards
and seafloor instability. Preliminary analysis of conditions of the Caspian Sea, especially south part, showed that suitable
thermobaric and physical-mechanical condition, clayey deposits and high concentrations of organic matter, increase the
possibility of gas accumulations. Studies showed that most part of gas hydrate compose of methane. Then, in this study, based
on physicochemical function for stability of methane hydrate which include pressure, temperature and salinity, gas hydrate
potential in Caspian Sea basin for more than 600 points was analyzed and zoning maps for upper and lower limit of methane
hydrate potential were presented. The study showed there are physicochemical conditions for composing methane hydrate
from the depth near to seabed up to more than 4000 meter below the sea surface for low geothermal gradient, theoretically. For
high geothermal gradient, lower limit end at 2500 meter below the sea surface. Comparing the results with geophysical survey
showed that gas hydrate, usually accommodate near the lower physicochemical limit for high gradient geothermal.
Hadi Gerivani has completed his PhD at the age of 32 years from Ferdowsi University of Mashhad. He is the Assistant Professor at Iranian National Institute of
Oceanography and Atmospheric Science. He has published more than 5 papers in reputed journals.
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