Proven Oil Reserves is valued through geological and engineering processes to produce an estimated value of oil stocks in the ground. Proven Oil Reserves showcases the commercially available (and recoverable) oil reserves of a given country based on its recognized reservoirs. For the purposes of the GFP ranking, oil is a highly valued factor when considering a prolonged war and is used in conjunction with oil consumption and oil production.
Proven Oil Reserves data through 2015. The values below are displayed in Barrels per Day (bbl).
Sources: CIA.gov, CIA World Factbook, wikipedia.com, public domain print and media sources and user contributions. Some values may be estimated when official sources are lacking.