*M ore than 100 years.
† Less than 0.05.
◆Less than 0.05%.
‡E xcludes Former Soviet Union.
#E xcludes Estonia and Latvia in 1994.
Notes: Total proved reserves of oil – Generally taken to be those quantities that geological and engineering information indicates with reasonable certainty can be recovered in the future from
known reservoirs under existing economic and operating conditions. The data series for proved oil reserves does not necessarily meet the definitions, guidelines and practices used for determining
proved reserves at company level, for instance as published by the US Securities and Exchange Commission, nor does it necessarily represent BP’s view of proved reserves by country.
Reserves-to-production (R/P) ratio – If the reserves remaining at the end of any year are divided by the production in that year, the result is the length of time that those remaining reserves
would last if production were to continue at that rate.
Source of data – The estimates in this table have been compiled using a combination of primary official sources, third-party data from the OPEC Secretariat, World Oil, Oil & Gas Journal and
independent estimates of Russian reserves based on official data and Chinese reserves based on information in the public domain. Canadian oil sands ‘under active development’ are an official
estimate. Venezuelan Orinoco Belt reserves are based on the OPEC Secretariat and government announcements.
Reserves include gas condensate and natural gas liquids (NGLs) as well as crude oil.
Shares of total and R/P ratios are calculated using thousand million barrels figures.