黑料网

Abstract

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.

Biography

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.