- The Organization of the Petroleum Exporting Countries.
- Intergovernmental Organization | created | September 10–14, 1960 | at the Baghdad Conference.
- Founding members | Iran, Iraq, Kuwait, Saudi Arabia and Venezuela.
- 12 member countries currently | Algeria (Africa) | Congo (Africa)| Equatorial Guinea (Africa) | Gabon (Africa) | Iran (Asia) | Iraq (Asia)| Kuwait (Asia) | Libya (Africa) | Nigeria (Africa) | Saudi Arabia (Asia) | UAE (Asia) | Venezuela (South America).
- The OPEC Secretariat-HQ | located in Vienna.
- Proven OPEC Crude Oil Reserves | 79.5% of total world reserves | 1243.53 billion barrels | OPEC Annual Statistical Bulletin 2023.
- OPEC Middle East countries share of Crude Oil Reserve | 67.2% of the OPEC total.
- Proven Non-OPEC Crude Oil Reserves | 20.5% of total world reserves | 320.92 billion barrels | OPEC Annual Statistical Bulletin 2023.
OPEC Countries with 100 Billion Barrell+ Proven Reserves
- Venezuela – 303.22
- Saudi Arabia – 267.19
- Iran – 208.60
- Iraq – 145.02
- UAE – 113
- Kuwait – 101.50
OPEC Annual Statistical Bulletin 2023