Oil prices rose in early trading on Friday as turmoil in Nigeria, shale bankruptcies in the United States and crisis in Venezuela all contributed to tightening supplies. Despite this, brimming inventories across the world were preventing supply shortfalls and sharper price spikes, traders said. International Brent crude futures LCOc1 were trading at $49.10 per barrel at 0128 GMT, up 29 cents or 0.59 percent from their last settlement. U.S. West Texas Intermediate ( WTI ) crude futures CLc1 was up 39 cents, or 0.81 percent, at $48.55 a barrel. ANZ bank said that unexpected supply disruptions across the world, excluding output falls in the United States, amounted to around 2.5 million barrels of daily production, virtually erasing a production overhang that had pulled down prices by over 70 percent between 2014 and early 2016. […]