The logo of the Organization of the Petroleum Exporting Countries (OPEC) is pictured at its headquarters in Vienna, Austria, August 21, 2015. OPEC forecasters expect oil prices will rise by no more than $5 a barrel a year to reach $80 by 2020, with a slowing in rival non-OPEC production growth not enough to absorb the current oil glut, according to OPEC sources. The sources said the figures came from an updated mid-term strategy report discussed this week by representatives from the Organization of the Petroleum Exporting Countries (OPEC) in Vienna, which has yet to be fully endorsed by OPEC ministers. The report forecasts that non-OPEC supply would amount to 58.2 million barrels per day by 2017, some 1 million barrels per day lower than in the previous forecast. That effectively means OPEC will have to supply the world with 1 million extra barrels per day – good news […]