The Chinese companies are replacing Western oil and gas majors who left Iraq in search of greener pastures. CNPC took over the West Qurna 1 field last year and plans to boost its capacity to 1.2 million barrels daily by 2035. West Qurna 1 is one of the largest oil fields in the world, with reserves estimated at more than 20 billion barrels of recoverable hydrocarbons. Currently, it produces around 550,000 barrels daily.