Nigeria is experiencing difficulties selling its crude oil, but imports most of its refined oil products. No, that is not a mistake.
Nigeria Bearing Brunt of U.S. Shale Oil Boom is the title of a recent Wall Street Journal article. As the title suggests, increased domestic production in the U.S. has had a serious impact on Nigerian oil sales:
Exports of Nigerian oil to the U.S. almost halved between 2011 and 2012, according to (U.S. Energy Information Administration) data. In the late 2000s, Nigeria regularly shipped around one million barrels a day of crude to the U.S., but last year that number was just 405,000 barrels a day.
Other members of OPEC have also been affected. Exports from both Angola and Algeria fell more than 30% last year. But the impact has been the most severe in Nigeria, which has historically sent the bulk of its oil exports to the U.S., and the country has been forced to react.