| RANK | COUNTRY | BILLION OF BARRELS |
| 1 | Saudi Arabia | 264.3 |
| 2 | Canada | 178.8 |
| 3 | Iran | 132.5 |
| 4 | Iraq | 115 |
| 5 | Kuwait | 101.5 |
| 6 | United Arab Emirates | 97.8 |
| 7 | Venezuela | 79.7 |
| 8 | Russia | 60 |
| 9 | Libya | 39.1 |
| 10 | Nigeria | 35.9 |
| 11 | United States | 21.4 |
| 12 | China | 18.3 |
| 13 | Qatar | 15.2 |
| 14 | Mexico | 12.9 |
| 15 | Algeria | 11.4 |
| 16 | Brazil | 11.2 |
| 17 | Kazakhstan | 9 |
| 18 | Norway | 7.7 |
| 19 | Azerbaijan | 7 |
| 20 | India | 5.8 |
Source: Oil & Gas Journal, Vol. 103, No. 47 (Dec 19, 2005). From: U.S. Energy Information Administration
