Brent crude futures LCOc1 declined 28 cents, or 0.4%, at $63.59 a barrel by 0547 GMT
Oil prices slipped on Friday in quiet trade with the US Thanksgiving holiday limiting activity, while investors awaited a meeting of OPEC and its allies next week that may result in the extension of an output cut agreement to support the market.
Brent crude futures LCOc1 declined 28 cents, or 0.4%, at $63.59 a barrel by 0547 GMT. Brent futures are set for a slight gain of 0.3% for the week, the fourth weekly increase, during which prices have climbed 3.1%.
West Texas Intermediate (WTI) futures CLc1 were down 15 cents, or 0.3%, at $57.97 a barrel.
For the week, WTI is set to gain 0.4%, the fourth weekly increase, during which prices have risen 3.2%.
Next week's meeting of the Organization of the Petroleum Exporting Countries (OPEC) and allies including Russia, a group known as OPEC+, is high on investors' list of things to watch.
The group has agreed to cut its output by 1.2 million barrels per day through to March to support prices and analysts expect the agreement to be extended as US production keeps hitting records.
"It is highly probable that the group will rollover the deal in its current form until at least the end of 2020, but we see limited scope for a new round of cuts, in light of uneven compliance and diminishing returns," Fitch Solutions said in a note.
Russian oil companies proposed on Thursday not to change their output quotas, putting pressure on OPEC+ to avoid any major shift in the policy when the group meets in Vienna on Dec. 5-6.
Still, "risk-neutral is an excellent spot to be ahead of the weekend as there is a ton of headline risk that could upset the apple cart," said Stephen Innes chief Asia market strategist at AxiTrader.
China warned the United States on Thursday that it would take "firm countermeasures" in response to US legislation backing anti-government protesters in Hong Kong.
Investors are concerned any such move by China would further delay a preliminary agreement with the United States to end their trade war that has held back growth in global economies and in the consumption of oil.