FILE- In this Sunday, Dec. 20, 2015 file photo, a man rides a camel through the desert oil field and winter camping area of Sakhir, Bahrain. OPEC nations have agreed in theory that they need to reduce their production to help boost global oil prices during a meeting in Algeria, but a major disagreement between regional rivals Saudi Arabia and Iran still may derail any cut. (AP Photo/Hasan Jamali, File) Photo: Hasan Jamali, STR / Copyright 2016 The Associated Press. All rights reserved.