The Guardian | Oil prices rise by 2.5% to highest level since November The Guardian The closure of a processing plant in Nigeria was the latest problem to hit the global supply of oil. Last week's wildfires around the Canadian city of Fort McMurray, disrupting the region's oil sand production, has been cited as another factor ... Oil Rises as Goldman Sachs Sees Supply Shortfall Oil prices surge on Nigerian outages, Goldman forecast Goldman Sachs calls end to cheap oil |