| na | Not available / not applicable |
| $ | US dollar |
| € | Euro |
| DZD | Algerian dinar |
| XAF | Central African Franc (Congo, Gabon and Equatorial Guinea) |
| IRR | Iranian rial |
| IQD | Iraqi dinar |
| KWD | Kuwaiti dinar |
| LYD | Libyan dinar |
| NGN | Nigerian naira |
| SAR | Saudi Arabian riyal |
| AED | United Arab Emirates dirham |
| VES | Bolívar soberano |
| b | barrel(s) |
| b/d | barrels per day |
| b/yr | barrels per year |
| bn | billion |
| bn b | billion barrels |
| cif | cost, insurance and freight |
| cu m | cubic metres |
| dwt | deadweight tonnage |
| fob | free on board |
| ft | feet |
| GDP | gross domestic product |
| GTL | Gas to liquid |
| LHS | left-hand side |
| LNG | liquefied natural gas |
| LPG | liquefied petroleum gas |
| m | million |
| m b | million barrels |
| NCV | net calorific value |
| NCO | non-conventional oil |
| NOC | national oil company |
| NGLs | natural gas liquids |
| RHS | right-hand side |
| s cu m | standard cubic metres |
| t | tonne |
| tr | trillion |
Rounding: In all tables totals may not add up due to independent rounding.
Balance of import-export tables may not match due to independent assessments and usage of various secondary sources.