MarketWatch | Oil closes up amid Libyan output concerns, but posts weekly loss MarketWatch Oil futures settled higher Friday, buoyed by uncertainty surrounding Libya's crude production, but prices still registered a loss for the week on the back of rising U.S. output. Prices, however, saw a loss of more than 1% for the week, fueled by rising ... Armed faction enters major Libyan oil port Libya's Biggest Oil Port Seized in Blow to Production Surge East Libyan forces clash with rivals near oil ports |