`` However , supply worries Negative_sentiment would ease even more should Iraq manage to push militants back to Mosul and also provided UAE continues to boost Cause.movement.up.gain output . ''

The market faces a range of supply crises Crisis , most notably in OPEC member Iran , that may compel other producers in the cartel to boost Cause.movement.up.gain output .

Some analysts have also warned that the disruptions Cause.movement.down.loss are likely to cause other producers , particularly ExxonMobil , to quickly boost Cause.movement.up.gain production as prices rise Movement.up.gain .

Even as Iraq 's Oil Minister Abdul Kareem Luaibi sketched out plans to boost Cause.movement.up.gain output in OPEC 's second biggest producer , Sunni Islamist insurgents in the north seized control of Mosul - Iraq 's second city and pressed on to Iraq 's biggest oil refinery at Baiji .

Moscow responded within minutes to what looked like a war of words , with Alexander Novak , the country 's energy minister , saying Russia had the ability to boost Cause.movement.up.gain production by 500,000 barrels a day .

Crude prices closed up Movement.up.gain more than 4 percent on Thursday as rising violence Civil.unrest in producer Libya and a boost Cause.movement.up.gain in oil demand .

By cutting Cause.movement.down.loss further , the group may boost Cause.movement.up.gain prices and end up encouraging more investment in U.S. shale and a create a fresh surplus Oversupply .

Over the past year , the kingdom has emerged as OPEC 's leading supporter of measures to boost Cause.movement.up.gain prices .

`` The big mistake was that they continued to reduce Cause.movement.down.loss production to try to boost Cause.movement.up.gain the prices and the price plunged Movement.down.loss anyway , '' said analyst Yasser Elguindi of Medley Global Advisors .

`` The big mistake was that they continued to cut Cause.movement.down.loss supply to try to boost Cause.movement.up.gain the prices and the price dropped Movement.down.loss anyway , '' said analyst Yasser Elguindi of Medley Global Advisors .