The front-month Brent contract for December delivery expires on Thursday.
In the United States, TC Energy Corp's 750,000 barrels per day (bpd) Marketlink crude pipeline from Cushing, Oklahoma, to Nederland, Texas, was operating at reduced rates, three sources said.
Oil rose the most in six weeks on upbeat U.S.jobs data and Chinese manufacturing figures, but persistent trade-war concerns kept prices down on the week.
The ongoing tub of war between hope for a reconciliation between China and the US at one end and worry over a weakening economy on the other weighed in favour of the latter within the crude trading community on Thursday, with modest losses for both benchmarks inspired by weak factory data from China. But WTI prices could still be pressured because of the Marketlink flows slowing.
The market received some respite from a run of poor economic data after an unexpected bounce in a private sector survey of Chinese manufacturing activity on Friday, which contrasted with dour results in an official survey Thursday.
Leaders from the United States and China encountered a new obstacle in their struggle to end the trade conflict when the summit at which they were supposed to meet was canceled because of violent protests in Chile, the host nation.
A Reuters survey showed that oil prices are likely to remain pressured this year and next.
Oil headed for its biggest weekly loss in a month as swelling American stockpiles and renewed doubts over a long-term U.S. Crude supplies were forecast to increase by 2.5 million barrels, according to analysts polled by S&P Global Platts. Chinese officials don't expect any meaningful breakthrough in the talks unless the USA offers to roll back some of the tariffs it has slapped on Chinese imports, according to Bloomberg's sources.
For the week ending October 25, US commercial crude oil inventories increased 5.7 million barrels from the previous week, the Energy Information Administration reported on Wednesday.
USA crude oil stockpiles soared last week amid higher imports and a release from national reserves, while gasoline and distillate inventories extended their declines even as refiners ramped up production, the Energy Information Administration (EIA) said. "Risk assets were dealt a blow as market players anxious that the U.S. and China would delay settling their trade differences", said PVM analyst Stephen Brennock.