By Christian Berthelsen, Neena Rai and Benoît Faucon 

Crude-oil prices fell Thursday after worries about production in Saudi Arabia and Libya eased.

Light, sweet crude for December delivery was down 76 cents, or 1%, at $77.92 a barrel on the New York Mercantile Exchange. Brent crude was down 61 cents, or 0.7%, at $82.35 a barrel on the ICE Futures Europe exchange.

Markets jumped Wednesday and arrested their monthslong slide after a fire was reported at a pipeline in Saudi Arabia and rebels attacked Libya's main oil field. But they turned lower early Thursday on reports that damage to the Saudi Aramco diesel pipeline was limited and that the Libyan rebel attack was over.

In addition, the loss of Libyan production was small relative to 1 million-barrel surplus in international markets at the moment.

"Following the renewed occupation by armed militants of the El Sharara oil field in the south west of Libya, the market has been 'stripped' of 200,000 barrels of crude oil per day from Libya," said Commerzbank in a note to clients.

On Thursday, The Wall Street Journal reported that the Organization of the Petroleum Exporting Countries could lower production if oil prices fall to $70 a barrel. The WSJ report cited OPEC officials.

The market was also supported by data showing weekly U.S. oil stockpiles didn't increase as much as expected.

"U.S. prices (WTI) did a lot better than European prices (Brent) after some helpful U.S. data," said Tobin Gorey, commodities analyst at Commonwealth Bank of Australia. "A bounce after setting new lows is not all that surprising, but the main issue remains just how far OPEC is willing to push on with price competition."

Gasoline for December delivery was flat at $2.9872 a gallon. December diesel was down 0.68 cent at $2.4319 a gallon.

Write to Christian Berthelsen at christian.berthelsen@wsj.com, Neena Rai at neena.rai@wsj.com and Benoît Faucon at benoit.faucon@wsj.com

Subscribe to WSJ: http://online.wsj.com?mod=djnwires

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