For each of the three proposed gas hydrate production methods (left frame), conditions within initially stable hydrate-bearing sediment are shifted such that hydrate at that location is no longer stable, and will begin dissociating. Right frame: Depressurization: achieved by reducing the formation pressure below equilibrium limits. Thermal stimulation: achieved by increasing the formation pressure beyond equilibrium conditions. Chemical stimulation: changes in gas hydrate equilibrium conditions are induced by inhibitor injection.
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From collection: Frozen Heat - A Global Outlook on Methane Gas Hydrates