Global benchmark Brent crude LCOc1 was down 39 cents at $46.56 a barrel at 0917 GMT. It closed Tuesday 5.7 percent higher on news that members of the Organization of the Petroleum Exporting Countries would renew efforts to limit production. U.S. crude CLc1 was 47 cents lower at $45.34 a barrel.

Light, sweet crude for December delivery settled down 9 cents, or 0.2%, at $43.32 a barrel on the New York Mercantile Exchange, the lowest settlement since Sept. 19. U.S. oil fell as low as $42.20 a barrel, the lowest intraday price since mid-August, before a rebound throughout the afternoon. Brent, the global benchmark, fell 32 cents, or 0.7%, to $44.43 a barrel, its lowest settlement since Aug. 10.

Brent crude futures LCOc1 were down 2 cents on the day at $44.73 a barrel by 1005 GMT (5:05 a.m. ET), while NYMEX crude futures CLc1 were down 6 cents at $43.35 a barrel.

The downturn produced a leaner, more efficient U.S. shale industry that was forced to develop and quickly adapt new technology to compete with conventional oil supplies during a two-year period of depressed prices.

International Brent crude oil futures LCOc1 were trading at $45.77 per barrel at 0743 GMT (2:43 a.m. ET), down 7 cents from their last close. U.S. West Texas Intermediate (WTI) crude oil futures CLc1 were trading down 10 cents at $44.56 per barrel, weighed down by weakening U.S. demand.

Russian Energy Minister Alexander Novak said on Thursday global crude oil output could be frozen at November levels if the world's leading oil producers reach an agreement on Nov. 30.

At 3:30 pm Singapore time (0739 GMT), January ICE Brent crude futures were down 64 cents/b (1.39%) from Tuesday's settle at $45.40/b, while the NYMEX December light sweet crude contract fell 59 cents/b (1.31%) to $44.39/b.

Brent crude futures LCOc1 were trading at $46.29 per barrel at 0705 GMT, up 71 cents, or 1.56 percent, from their previous close. U.S. West Texas Intermediate (WTI) crude futures CLc1 were up 730 cents, or 1.66 percent, at $44.80 a barrel.

U.S. West Texas Intermediate crude CLc1 fell by 70 cents to $45.97 by 0611 ET and Brent crude LCOc1 was down 69 cents at $47.45. Both contracts were at their lowest since Sept. 28.

London Brent crude for December delivery LCOc1 was down 29 cents, or 0.6 percent, at $49.42 a barrel by 0750 GMT after settling down 76 cents on Friday. NYMEX crude for December delivery CLc1 was trading down 29 cents, or 0.6 percent, at $48.41 a barrel, after closing down $1.02 on Friday.