Brent crude oil prices have surged from a low of about USD60 per barrel in early May to nearly USD80 per barrel now amid global uncertainties this year, according to a report from Morgan Stanley.The broker simplified the global situation into three main scenarios. If Middle East tensions are resolved quickly, oil prices may fall back to USD60 per barrel. If tensions remain high, uncertainties in Iranian supply may keep oil prices within the current range. If there is a severe global supply disruption and regional transportation is hindered, oil prices will rise significantly from current levels.Related NewsG Sachs: Considering Reduced Iranian Supply, Brent Oil Prices Expected to Surge Slightly Above US$90