World’s biggest proved oil reserves (Top 20; CIA Factbook)
(Converted to billion barrels for readability; original is in barrels.)
| Rank | Country | Proved reserves (bn bbl) |
| 1 | Venezuela | 302.3 |
| 2 | Saudi Arabia | 266.2 |
| 3 | Canada | 170.5 |
| 4 | Iran | 157.2 |
| 5 | Iraq | 148.8 |
| 6 | Kuwait | 101.5 |
| 7 | United Arab Emirates | 97.8 |
| 8 | Russia | 80.0 |
| 9 | Libya | 48.36 |
| 10 | Nigeria | 37.45 |
| 11 | Kazakhstan | 30.0 |
| 12 | China | 25.63 |
| 13 | Qatar | 25.24 |
| 14 | Brazil | 12.63 |
| 15 | Algeria | 12.2 |
| 16 | Angola | 9.523 |
| 17 | Ecuador | 8.273 |
| 18 | Azerbaijan | 7.0 |
| 19 | Mexico | 6.63 |
| 20 | Norway | 6.376 |