Oil prices rose slightly on Friday, but were set for a fourth straight month of losses amid growing concerns over weakening demand, with focus now turning to a potential supply cut by the OPEC next week. 

China's services activity expanded at a slower pace in September, an official survey showed on Friday, as COVID-19 curbs in populous cities weighed on consumption.

China's factory activity contracted at a sharper pace in September as strict COVID lockdowns disrupted production and dampened sales, a private sector survey showed on Friday.

Oil prices rose further on Thursday after expectations of declining U.S. supply sparked a two-day rally, with focus now turning to upcoming Chinese manufacturing data and an OPEC meeting that could potentially result in more supply curbs.

Asian share markets rose on Thursday after Britain's central bank launched an emergency bond buying programme to stabilise a furious sell-off in gilts, though trade was skittish and sterling remained under pressure.

A rebound in oil prices appeared to be running out of fuel on Wednesday as fears of slowing short-term demand offset a potential supply shortage stemming from OPEC production cuts and a hurricane in the Gulf of Mexico.