Crude prices closed more than 4-percent higher on Thursday as conflict in producer Libya and an expected boost in oil demand following China's central bank easing helped the market rebound.The U.S. Energy Information Administration said in its weekly report that natural gas storage in the U.S. in the week ended January 30 fell by 115 billion cubic feet, compared to expectations for a decline of 121 billion. Natural gas storage in the U.S. fell by 94 billion cubic feet in the preceding week.