(Reuters) – Oil prices dipped about 1% on Thursday, extending losses after postponement of an OPEC+ meeting stoked expectations that the group might not deepen output cuts next year.

Brent crude futures were down 90 cents, or about 1.1%, at $81.06 a barrel by 1143 GMT after falling as much as 4% on Wednesday.

U.S. West Texas Intermediate crude slid 86 cents, also about 1.1%, to $76.24 after dropping as much as 5% in the previous session.

In a surprise move on Wednesday, the Organization of the Petroleum Exporting Countries and allies including Russia delayed to Nov. 30 a ministerial meeting at which they were expected to discuss oil output cuts.

Producers were struggling to agree on output levels ahead of the meeting originally set for Nov. 26, OPEC+ sources said, suggesting that the disagreement was largely linked to a trio of African nations.

Angola, Congo and Nigeria were seeking to raise their 2024 supply quotas above the provisional levels agreed at the June meeting of the OPEC+ producer group, analysts said.

Angola and Congo have been producing below their 2024 production targets. Meanwhile, some estimates suggest that Nigeria has been able to nudge output near or above the target thanks to an improving security situation in the oil-rich Niger Delta.

“We think Nigeria can be assuaged as the leadership values its longstanding OPEC membership and improving ties with Saudi Arabia,” said RBC Capital Markets analyst Helima Croft.

“However, it may be more difficult to bridge the gap with Angola, which has been a moodier member of the producer group since it joined in 2007.”

Although internal upheavals have been quelled effectively in the past, this latest episode lays bare the enormity of the task that OPEC+ must accomplish, said Tamas Varga of oil broker PVM.

“What is certain is continuous volatility with a plausible price swing to the extent of $10+ after next Thursday’s meeting and possibly even before,” he said.

The questions over OPEC+ supply come as data showed that U.S. crude stocks jumped by 8.7 million barrels last week, much more than the 1.16 million build analysts had expected. [EIA/S]

On the demand side, there was more bleak news. Though a survey showed the downturn in euro zone business activity eased in November, data suggested the bloc’s economy will contract again this quarter as consumers continue to rein in spending.

U.S. trade is expected to be muted on Thursday because of the Thanksgiving public holiday.