Saudi Arabia's Energy Minister Prince Abdulaziz bin Salman, speaking at the coalition's committee meeting on Monday, called on the group to be proactive in the face of uncertain demand
Brent crude futures fell 23 cents to settle at $42.93 a barrel, and US West Texas Intermediate (WTI) crude futures dropped 8 cents to settle at $40.88 a barrel
"We have to be realistic that this recovery is not picking up pace at the rate that we expected earlier in the year," he said. "Demand itself is still looking anaemic."
At the same time, markets are set to receive fresh supplies in January as OPEC and its partners relax some of the measures they've taken to prevent a glut
The main reason OPEC was able to wrest this control in 1973 was that in 1970, crude oil production in Texas started to fall
Oil prices slipped further below $40 a barrel in London on Monday, close to their lowest in more than two months
Earlier on Wednesday, Oil Minister Ihsan Abdul Jabbar was quoted as saying that he has spoken about the exemption to key OPEC oil ministers in three separate meetings
Firmer stock markets and a weaker dollar were also lending support, said Commerzbank analyst Eugen Weinberg
World oil demand will fall by 9.06 million barrels per day (bpd) this year, the Organization of the Petroleum Exporting Countries said in a monthly report
The oil company will boost outpur capacity by 1 million barrels per day (bpd) to 13 million bpd despite spending cuts this year and next year
Both benchmarks rose 2% on Wednesday following a sharp drawdown in US crude inventories
Futures in New York dropped below $41 a barrel, though the more global Brent benchmark's structure firmed on signs of tightness in physical markets.
Brent crude futures settled at $43.08 a barrel, down 2 cents in the session. US West Texas Intermediate settled down 1 cent at $40.62 a barrel.
The Organization of Petroleum Exporting Countries cut production by 1.93 million barrels a day to 22.69 million a day last month, according to the survey.
OPEC+ have agreed to cut production by a record 9.7 million barrels per day
Crude stocks rose by 5.7 million barrels in the week to June 5 to 538.1 million barrels, according to a report from the USEnergy Information Administration.
The speed at which the oil market rebounded to $40 per barrel has certainly grabbed attention, but it needs to walk before it can run
The group, known as OPEC+, agreed on Saturday to sustain those cuts, equal to about 10% of global supply, through July
OPEC+ had initially agreed in April that it would cut supply by 9.7 million barrels per day (bpd) during May-June to prop up prices that collapsed due to the coronavirus crisis.
An extension to cuts was contingent on high compliance, three Opec sources told Reuters