Huge amount of methane hydrates worldwide exist at offshore and onshore areas, particularly in reservoirs of marine sediments. Because the development of methane hydrates is of great interest for future energy of natural gas, a lot of R&D projects have been undertaken to achieve the whole system including geological survey, exploration, production and enhanced recovery technologies. Japanese program MH21 has promoted the own R&D, focused on the production of methane hydrates from offshore areas. In this talk, research and development related to gas hydrates production are summarized to reveal the status and updated technologies of its exploitation. Recent predominant R&D cases of gas hydrates enhanced recovery are also introduced for advanced energy utilization and sustainable development of gas hydrate resources.

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