Majnun – Proven reserves: 12.1 –20.0 billion barrels West Qurnah -- Proven reserves: 11.3 –15.0 billion barrels East Baghdad -- Proven reserves: 11+ billion barrels Karkuk -- Proven reserves: 10+ billion barrels Nahr Umar -- Proven reserves: 6+ billion barrels Ratawi -- Proven reserves: 3.1 billion barrels Halfaya -- Proven reserves: 2.5 – 4.6 billion barrels Nasiriyah -- Proven reserves: 2 – 2.6 billion barrels Ar Rumaylah -- Proven reserves: 10+ billion barrels Bayji – Crude refining capacity: 150,000 barrels per day Al Basrah – Crude refining capacity: 140,000 barrels per day Ad Dawrah – Crude refining capacity: 100,000 barrels per day Khanaqin – Crude refining capacity: 12,000 barrels per day Hadithah – Crude refining capacity: 7,000 barrels per day Mosul – Crude refining capacity: 2,000 barrels per day