Goldman Sachs: oil price to remain low for another 15 years

According to Goldman Sachs Group Inc, a glut of crude oil may keep oil prices low for the next 15 years. 

The head of commodities research at the bank, Jeffrey Currie, said there's less than a 50% chance that prices will drop to $20 a barrel, when refineries shut in October and March for maintenance. 

Goldman's long-term forecast for crude is $50 a barrel, Interfax reports.