section_path: Sources/Crystallized natural gas – clathrates
section_name: Crystallized natural gas – clathrates
paragraph_text: Crystallized natural gas – clathrates
  
  Huge quantities of natural gas (primarily methane) exist in the form of clathrates under sediment on offshore continental shelves and on land in arctic regions that experience permafrost, such as those in Siberia. Hydrates require a combination of high pressure and low temperature to form.
  
  In 2013, Japan Oil, Gas and Metals National Corporation (JOGMEC) announced that they had recovered commercially relevant quantities of natural gas from methane hydrate.