Oil prices rose on Friday as data showed the number of U.S. oil rigs was declining.
The number of rigs operating in U.S. oil fields fell by four to a total of 759 rigs this week, according to data released by oilfield service firm Baker Hughes on Friday.

Analysts said the figure eased investors' concern about chronic global oversupply.

Meanwhile, weaker U.S. dollar made the greenback-denominated oil more attractive for holders of other currencies.

The dollar index, which measures the greenback against six major peers, was down 0.54 percent at 92.771 in late trading.

The West Texas Intermediate for October Delivery added 0.44 dollar to settle at 47.87 dollars a barrel on the New York Mercantile Exchange, while Brent crude for October delivery gained 0.37 dollar to close at 52.41 dollars a barrel on the London ICE Futures Exchange.