Which one were you referring too?
| 1. Ghawar Unknown |
| 2a. Burgan CONFIRMED DECLINE ~14% |
| 2b. Cantarell CONFIRMED DECLINE ~14% |
| 3. Bolivar Coastal Unknown |
| 4. Safaniya-Khafji Unknown |
| 5. Rumaila Unknown |
| 6. Tengiz Unknown |
| 7. Ahwaz CONFIRMED DECLINE ~64% |
| 8. Kirkuk CONFIRMED DECLINE |
| 9. Marun CONFIRMED DECLINE |
| 10. Gachsaran Unknown |
| 11. Aghajari CONFIRMED DECLINE |
| 12. Samotlor CONFIRMED DECLINE ~ 9% |
| 13a. Prudhoe Bay CONFIRMED DECLINE ~11% |
| 13b. Kashagan Unknown |
| 14. Abqaiq Unknown, but have you seen the cross section? It's all water! |
| 15. Romashkino Unknown |
| 16. Chicontepec Unknown |
| 17. Berri Unknown |
| 18. Zakum Unknown |
| 19. Manifa Unknown |
| 20. Faroozan-Marjan Unknown |
| 21. Marlim, Campos CONFIRMED DECLINE ~8% |
| 1. Ghawar, Saudi Arabia 75-83 billion barrels |
| 2a. Burgan, Kuwait 66-72 billion barrels |
| 2b. Cantarell, Mexico (often listed as a large complex of multiple smaller fields) 35 billion barrels |
| 3 Bolivar Coastal, Venezuela 30-32 billion barrels |
| 4 Safaniya-Khafji, Saudi Arabia/Neutral Zone 30 billion barrels |
| 5 Rumaila, Iraq 20 billion barrels |
| 6 Tengiz, Kazakstan 15-26 billion barrels |
| 7 Ahwaz, Iran 17 billion barrels |
| 8 Kirkuk, Iraq 16 billion barrels |
| 9 Marun, Iran 16 billion barrels |
| 10 Gachsaran, Iran 15 billion barrels |
| 11 Aghajari, Iran 14 billion barrels |
| 12 Samotlor, West Siberia, Russia 14-16 billion barrels |
| 13a.Prudhoe Bay, Alaska, USA 13 billion barrels |
| 13b. Kashagan, Kazakhstan 13 billion barrels |
| 14 Abqaiq, Saudi Arabia 12 billion barrels |
| 15 Romashkino, Volga-Ural, Russia 12-14 billion barrels |
| 16 Chicontepec, Mexico 12 billion barrels |
| 17 Berri, Saudi Arabia 12 billion barrels |
| 18 Zakum, Abu Dhabi, UAE 12 billion barrels |
| 19 Manifa, Saudi Arabia 11 billion barrels |
| 20 Faroozan-Marjan, Saudi Arabia/Iran 10 billion barrels |
| 21 Marlim, Campos, Brazil 10-14 billion barrels |