December Brent crude futures LCOc1 were last up 42 cents at $50.61 a barrel by 0913 GMT, off a session low of $49.74, while U.S. crude futures CLc1 rose 37 cents to $48.61 a barrel, above the day's low at $47.78.

The November contract for global crude benchmark Brent was up 0.78% at $46.33 while its U.S. counterpart West Texas Intermediate gained 0.58% to hit $44.94.

U.S. West Texas Intermediate (WTI) crude had fallen 38 cents to $45.55 a barrel by 0103 GMT, after rising $1.45, or 3.3 percent, in the previous session. Brent crude futures slipped 43 cents to $46.91 a barrel after closing up $1.46, or 3.2 percent.

Brent crude futures LCOc1 rose 73 cents to $46.62 a barrel by 1052 GMT, having rallied from a session low of $45.74, while U.S. crude prices CLc1 rose 54 cents to $45.02 a barrel.

Brent crude futures were at $46.54 per barrel at 0645 GMT (02:45 a.m. EDT), up 77 cents, or 1.7 percent, from their previous settlement. U.S. crude was up 78 cents, or 1.8 percent, at $43.81 a barrel.

On the New York Mercantile Exchange, light, sweet crude futures traded at $43.65 a barrel at 0301 GMT, down 26 cents in the Globex electronic session. Brent crude on London's ICE Futures exchange fell 25 cents to $46.34 a barrel.

On the New York Mercantile Exchange, light, sweet crude futures for delivery in October traded at $43.72 a barrel at 0145 GMT, up $0.14 in the Globex electronic session. November Brent crude on London's ICE Futures exchange rose $0.27 to $46.12 a barrel.

Global oil demand growth is slowing at a faster pace than initially predicted.

Brent crude prices LCOc1 fell 92 cents to $47.40 a barrel by 0910 GMT (05:10 a.m. EDT), while U.S. West Texas Intermediate futures CLc1 declined by $1.03 to $45.26 a barrel.

London Brent crude for November delivery was down 58 cents at $49.41 a barrel as of 0647 GMT after rising above $50 for the first time in two weeks and settling up $2.01, or 4.2 percent, on Thursday. NYMEX crude for October delivery was down 51 cents at $47.11.