Oil prices fell slightly today, as investors eyed how major producers respond to the US-led emergency oil release designed to cool the market and with OPEC now expecting the release to swell inventories.

Brent crude futures slipped 14 cents, or 0.2%, to $82.11 a barrel this afternoon, while US West Texas Intermediate (WTI) crude futures fell 30 cents, or 0.4%, to $78.09 a barrel.

OPEC expects the US release to swell a surplus in oil markets by 1.1 million barrels per day (bpd), a source from the group said.

The Organization of the Petroleum Exporting Countries, Russia and allies, together called OPEC+, will meet on December 1-2 to set policy.

"The bold move from the oil importers has opened the door wide open for OPEC+ to adjust its supply policy downwards at its next (meeting on) 2 December 2021," Rystad Energy analyst Louise Dickson said.

OPEC+ has been adding 400,000 barrels per day of supply since August, unwinding record output cuts made last year when pandemic curbs slammed demand.

Three sources told Reuters OPEC+ is not discussing pausing its oil output increases, despite the decision by the US, Japan, India and others to release emergency oil stocks.

OPEC members the United Arab Emirates and Kuwait said they were fully committed to the OPEC+ agreement and had no prior stance ahead of next week's meeting.

Iraq, also an OPEC member, said it backs continuing OPEC+'s existing plan of raising output by 400,000 bpd a month, saying the outlook for the oil market was unclear due to turbulence in global markets.

High oil prices have added to inflationary concerns. A coordinated release could add around 70-80 million barrels of crude supply to markets, analysts at Goldman Sachs said.

The US Department of Energy has launched an auction to sell 32 million barrels of strategic petroleum reserves (SPR) for delivery between late December to April 2022.

It plans to release another 18 million barrels soon.

Traders are also looking out for whether China will follow through on plans to release oil from its reserves.

US Energy Information Administration data this week showed gasoline and distillate stockpiles fell more than expected, while crude stocks rose.