Oil prices up slightly after industry data shows rise in U.S. crude inventories - MarketWatch
1. U.S. crude inventories surged by 3.34M barrels, exceeding forecasts. 2. Cold weather disrupted North Dakota oil production by 120K-150K barrels daily. 3. Oil futures, including CL.1, ticked up slightly for the week. 4. Inventory data and weather concerns drive near-term market sensitivity.