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GasDepositDiagramfr.svg fr Schma des diffrentes types de source gologique du gaz naturel Libells en franais Gaz associ aux gisements de ptrole Gaz conventionnel non associ Gaz de houille Gaz de rservoir ultracompact Gaz de schiste eia doe gov html US Energy Information Administration Schma modifi par rapport la source amricaine