World oil prices rose Thursday, rebounding slightly from recent losses after a successful Spanish bond auction eased energy demand concerns linked to the ongoing eurozone sovereign debt crisis. Brent North Sea crude for June gained 99 cents to $118.96 per barrel in London midday deals. New York's main contract, West Texas Intermediate (WTI) crude for delivery in May added 42 cents to $103.09 a barrel. "We had another successful Spanish auction today that gave further support to the equity and commodity markets and pushed crude oil prices higher after yesterday's sell-off," said Sucden analyst.