A worker checks the valve of an oil pipe at Nahr Bin Umar oil field, north of Basra, Iraq

A worker checks the valve of an oil pipe at Nahr Bin Umar oil field, north of Basra, Iraq December 21, 2015. Iraq has signed deals worth $1.4 billion to ship about 160,000 barrels per day of crude to two Indian refiners in 2016, sources said, upping the ante in a race among exporters to cement their market share in Asia - the world's top oil consuming region.  Picture taken December 21, 2015. REUTERS/Essam Al-Sudani  - RTX1ZVFW

A worker checks the valve of an oil pipe at Nahr Bin Umar oil field, north of Basra, Iraq December 21, 2015. Iraq has signed deals worth $1.4 billion to ship about 160,000 barrels per day of crude to two Indian refiners in 2016, sources said, upping the ante in a race among exporters to cement their market share in Asia – the world’s top oil consuming region. Picture taken December 21, 2015. REUTERS/Essam Al-Sudani – RTX1ZVFW