Investing.com - Oil was higher Wednesday as armed protesters disrupted output in Libya.
U.S. crude was up 27 cents, or 0.56%, at $48.64 at 08:00 ET. Brent crude gained 31 cents, or 0.60%, to $51.73.
Investors are also mulling the chances of an extension of output cuts by major producers.
OPEC and non-OPEC producers are cutting output by 1.8 million barrels a day in the first half.
Iranian Oil Minister Bijan Zanganeh said Tuesday an extension of the cuts beyond June is likely.
American Petroleum Institute weekly data Tuesday showed a rise of 1.9 million barrels in U.S. crude stocks.
The Energy Information Administration is expected to report a 1.357 million barrels rise in crude inventories.