Map: Iraq’s oil reserves under threat

A member of Kurdish security forces takes up position with his weapon as he guards an oil refinery on the outskirts of Mosul, June 22, 2014. U.S. Secretary of State John Kerry met Iraq's Prime Minister Nuri al-Maliki in Baghdad on Monday to push for a more inclusive government, even as Baghdad's forces abandoned the border with Jordan, leaving the entire Western frontier outside government control. Picture taken June 22, 2014. REUTERS/Azad Lashkari (IRAQ - Tags: CIVIL UNREST POLITICS MILITARY CONFLICT ENERGY TPX IMAGES OF THE DAY)

Analysts say the ISIL expansion campaign in Iraq will likely have a detrimental impact on overall oil production in the country and, in turn, global supplies.