Internationally traded Brent crude futures were down 29 cents at $47.15 a barrel.
The price drops came on the back of rising stockpiles in North America and slowing economies in Asia.
U.S. crude stocks jumped by 6.3 million barrels in the week to Nov. 6 to 486.1 million barrels, data from industry group the American Petroleum Institute showed late on Tuesday, compared with analyst expectations for an increase of 1 million barrels.
On the demand side, confidence among Japanese manufacturers fell in November for a third straight month to levels unseen in more than two years, a Reuters poll showed on Wednesday, reflecting fears that a China-led slowdown in overseas demand may have pushed Asia`s second-biggest economy into recession.
"The weakness of global manufacturing activity is ... putting pressure on energy demand," JBC Energy said, adding that it expected a significant drop in oil demand growth in 2016.
In China, factory output grew slower than expected at an annual 5.6 percent in October, data showed on Wednesday, slightly below analyst forecasts of 5.8 percent and down from 5.7 percent in September.
China`s oil demand rose 0.9 percent in October from a year earlier to 10.14 million barrels per day (bpd), according to Reuters` calculations based on preliminary government data, with many analysts expecting a further slowdown.
The oil market is also looking for any indicators from the Organization of the Petroleum Exporting Countries (OPEC) over its production policy.
Since oil prices began falling in June 2014, OPEC has followed a Saudi-led policy of keeping production high in order to defend market share against other producers such as Russia and North America.
But BNP Paribas said it expected OPEC to continue pumping for market share.
"As the next OPEC meeting on Dec. 4 looms closer, speculation over what the cartel will do next will rise. We do not expect any surprises from the next OPEC meeting, and OPEC`s experiment in letting price bring adjustments to the world`s oil balance has yet to run its full course," the bank said.
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