Gaz de schiste (shale)Source : US Department of Energy, Modern Shale Gas Development in the United States: A Primer, avril 2009, p. 14.
Forage horizontal et fracturation hydrauliqueSource : Ihara Ken, “Hi-zairaigata no genyu to tennnen gasu no seisan ni kakaru gijutsu topikku”(Technological Topics Concerning Unconventional Oil and Gas Development), site JOGMEC.