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A supergiant natural gas field is a geological formation that traps and holds a significant amount of natural gas, typically containing more than 850 billion cubic meters (30 trillion cubic feet) of gas. These fields are rare, representing less than 1% of all known gas fields, but they hold approximately 80% of the world's natural gas reserves.

These reservoirs are usually made of porous and permeable sedimentary rocks, such as sandstone or limestone, capped by an impermeable layer that prevents the gas from escaping. Natural gas migrates into these formations due to pressure differences. Examples of supergiant fields include Urengoy in Russia, Groningen in the Netherlands, and Hassi R'Mel in Algeria.1234

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