Proved Global Oil Reserves
Countries
Continents
at end 1991 at end 2001 2010
1000 million
barrels
1000 million
barrels
1000 million
barrels
US 32.15 30.44 30.88
Canada 40.1 180.95 175.23
Mexico 50.93 18.77 11.7
Total North America 123.18 230.16 217.81
 
Argentina 1.69 2.88 2.53
Brazil 4.82 8.49 14.25
Colombia 1.89 1.85 1.9
Ecuador 1.53 4.64 6.16
Peru 0.83 0.98 1.25
Trinidad & Tobago 0.58 0.97 0.83
Venezuela 62.65 77.69 296.51
Other S. & Cent. America 0.61 1.38 1.34
Total S. & Cent. America 74.56 98.84 324.74
 
Azerbaijan n/a 1.18 7
Denmark 0.62 1.35 0.9
Italy 0.83 0.83 1.42
Kazakhstan n/a 5.41 30
Norway 8.82 11.6 6.77
Romania 1.5 1.16 0.61
Russian Federation n/a 73.02 86.62
Turkmenistan n/a 0.55 0.61
United Kingdom 4.17 4.54 2.81
Uzbekistan n/a 0.6 0.6
Other Europe & Eurasia 60.92 2.23 2.2
Total Europe & Eurasia 76.82 102.42 139.5
 
Iran 92.87 99.09 151.17
Iraq 100 115 115
Kuwait 96.5 96.5 101.5
Oman 4.35 5.91 5.5
Qatar 3 16.84 24.69
Saudi Arabia 260.94 262.7 264.52
Syria 3 2.33 2.5
United Arab Emirates 98.1 97.81 97.81
Yemen 2.01 2.41 2.68
Other Middle East 0.08 0.13 0.28
Total Middle East 660.83 698.67 765.62
 
Algeria 9.2 11.32 12.2
Angola 1.45 6.5 13.5
Chad ... 0.9 1.5
Rep. of Congo (Brazzaville) 0.7 1.58 1.95
Egypt 3.54 3.67 4.5
Equatorial Guinea 0.31 1.12 1.71
Gabon 0.88 2.41 3.69
Libya 22.8 36 47.1
Nigeria 20 31.51 37.21
Sudan 0.31 0.7 6.7
Tunisia 0.41 0.53 0.43
Other Africa 0.82 0.62 2.27
Total Africa 60.38 96.81 132.72
 
Australia 3.23 4.96 3.84
Brunei 1.15 1.16 1.11
China 15.52 15.42 14.79
India 6.13 5.52 5.84
Indonesia 5.91 5.1 4.24
Malaysia 3.71 4.46 5.86
Thailand 0.22 0.59 0.45
Vietnam 0.24 2.21 4.41
Other Asia Pacific 0.92 1.13 1.23
Total Asia Pacific 37 40.51 41.71
 
Total World 1032.74 1267.39 1622.06
of which: OECD 142.68 254.76 234.97
Non-OECD 890.07 1012.63 1387.1
OPEC 769.02 855.55 1167.33
Non-OPEC 204.75 330.41 329.39
European Union 8.3 8.78 6.78
Former Soviet Union 58.99 81.43 125.36
 
Canadian oil sands: Total 32.4 174.66 169.19
of which: Under active development 3.16 11.53 25.93
Venezuela: Orinoco Belt ... ... 220
 
Countries
Continents
at end 2011
1000 million
barrels
1000 million
barrels
Share
of total
R/P
ratio
US 3.73 30.88 1.9% 10.79
Canada 28.24 175.23 10.6% (1)
Mexico 1.58 11.4 0.7% 10.63
Total North America 33.55 217.51 13.2% 41.67
 
Argentina 0.35 2.53 0.2% 11.4
Brazil 2.19 15.06 0.9% 18.81
Colombia 0.29 1.99 0.1% 5.86
Ecuador 0.91 6.16 0.4% 33.18
Peru 0.18 1.25 0.1% 22.25
Trinidad & Tobago 0.12 0.83 0.1% 16.74
Venezuela 46.31 296.51 17.9% (1)
Other S. & Cent. America 0.16 1.08 0.1% 22.07
Total S. & Cent. America 50.48 325.37 19.7% (1)
 
Azerbaijan 0.96 7 0.4% 20.61
Denmark 0.11 0.82 (2) 10
Italy 0.19 1.38 0.1% 34.26
Kazakhstan 3.94 30 1.8% 44.66
Norway 0.84 6.89 0.4% 9.25
Romania 0.08 0.61 (2) 18.68
Russian Federation 12.08 88.18 5.3% 23.51
Turkmenistan 0.09 0.61 (2) 7.62
United Kingdom 0.38 2.81 0.2% 6.99
Uzbekistan 0.09 0.6 (2) 18.91
Other Europe & Eurasia 0.31 2.22 0.1% 15.19
Total Europe & Eurasia 19.03 141.08 8.5% 22.33
 
Iran 20.77 151.17 9.1% 95.85
Iraq 19.32 143.11 8.7% (1)
Kuwait 13.99 101.5 6.1% 97.05
Oman 0.75 5.5 0.3% 16.92
Qatar 3.18 24.69 1.5% 39.26
Saudi Arabia 36.46 265.41 16.1% 65.16
Syria 0.35 2.5 0.2% 20.62
United Arab Emirates 12.98 97.81 5.9% 80.66
Yemen 0.35 2.68 0.2% 32.03
Other Middle East 0.09 0.66 (2) 37.08
Total Middle East 108.2 794.98 48.1% 78.66
 
Algeria 1.54 12.2 0.7% 19.34
Angola 1.83 13.5 0.8% 21.18
Chad 0.22 1.5 0.1% 36.15
Rep. of Congo (Brazzaville) 0.28 1.95 0.1% 18
Egypt 0.58 4.31 0.3% 16.03
Equatorial Guinea 0.24 1.71 0.1% 18.55
Gabon 0.51 3.69 0.2% 41.2
Libya 6.14 47.1 2.9% (1)
Nigeria 5.03 37.21 2.3% 41.48
Sudan 0.91 6.7 0.4% 40.53
Tunisia 0.06 0.43 (2) 15.01
Other Africa 0.3 2.19 0.1% 27.03
Total Africa 17.57 132.44 8.0% 41.22
 
Australia 0.44 3.88 0.2% 21.94
Brunei 0.15 1.11 0.1% 18.17
China 2.01 14.72 0.9% 9.86
India 0.76 5.71 0.3% 18.21
Indonesia 0.56 4.04 0.2% 11.76
Malaysia 0.77 5.86 0.4% 28.02
Thailand 0.06 0.45 (2) 3.51
Vietnam 0.6 4.41 0.3% 36.74
Other Asia Pacific 0.15 1.14 0.1% 10.4
Total Asia Pacific 5.47 41.27 2.5% 13.99
 
Total World 234.26 1652.62 100% 54.18
of which: OECD 35.67 234.73 14.2% 34.69
Non-OECD 198.59 1417.89 85.8% 59.74
OPEC 168.39 1196.32 72.4% 91.48
Non-OPEC 48.66 329.39 19.9% 26.35
European Union 0.9 6.67 0.4% 10.8
Former Soviet Union 17.21 126.92 7.7% 25.79
 
Canadian oil sands: Total 27.5 169.19    
of which: Under active development 4.22 25.93    
Venezuela: Orinoco Belt 35.28 220    
 

Notes:

(1) More than 100 years
(2) Less than 0.05%

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.
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 an independent estimate of Russian 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.

Graphics of global Oil Reserves-to-production (R/P) ratios

World Proved Oil Reserves

World proved oil reserves at the end of 2011 reached 1652.6 billion barrels, sufficient to meet 54.2 years of global production. The continuing increase in official Venezuelan reserves pushed the South & Central American R/P ratio above 100. The large increase in Middle Eastern production reduced the region's R/P ratio despite an increase in reserves; the region holds 48.1% of global proved reserves.

BP (British Petroleum)

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