Oil prices were steady above $91 a barrel Thursday in Asia after a report showed U.S. crude supplies unexpectedly rose last week, which suggests that a recovery in demand may have slowed, according to AP. Benchmark oil for February delivery rose 19 cents to $91.31 a barrel late afternoon Singapore time in electronic trading on the New York Mercantile Exchange. The contract fell 37 cents to settle at $91.12 on Wednesday. The American Petroleum Institute said late Wednesday that crude inventories rose 3.1 million barrels last week while analysts surveyed by Platts, the energy information arm of McGraw-Hill Cos., had forecast a drop of 3.2 million barrels. The crude supply increase was the first in five weeks and just the second in the last nine. Inventories are 4 percent above last year and 9.3 percent higher than the average from 2004 to 2008. «This should raise concerns about demand levels relative to supply,» energy consultant The Schork Report said. Inventories of gasoline fell 3.1 million barrels and distillates added 1.4 million barrels, the API said. The Energy Department's Energy Information Administration reports its weekly supply data later Thursday. Traders will be closely watching the latest data on weekly U.S. jobless claims, pending home sales and industrial production to gauge the strength of the economic recovery. Oil has hovered above $91 this week amid thin year-end trading volume. Global oil markets are closed Friday for the New Year's Day holiday. In other Nymex trading in January contracts, heating oil added 0.4 cent to $2.53 a gallon and gasoline futures gained 2.0 cents to $2.41 a gallon. February natural gas futures advanced 3.5 cents to $4.32 per 1,000 cubic feet. In London, Brent crude rose 17 cents to $94.31 a barrel on the ICE Futures exchange.