The de-facto leader of the cartel, Saudi Arabia said the cut of 2 million barrels per day (bpd) of output - equal to 2% of global supply - was necessary to respond to rising interest rates in the West and a weaker global economy.
The
kingdom rebuffed criticism it was colluding with Russia, which is included in
the OPEC+ group, to drive prices higher and said the West was often driven by
"wealth arrogance" when criticizing the group.
The White House said President Joe Biden would continue to assess whether to release further strategic oil stocks to lower prices.
"The President is disappointed by the shortsighted decision by OPEC+ to cut production quotas while the global economy is dealing with the continued negative impact of (Russian President Vladimir) Putin’s invasion of Ukraine," the White House said.
Biden faces low approval ratings ahead of mid-term elections due to soaring inflation and has called on Saudi Arabia, a long-term US ally, to help lower prices.
US officials have said part of the reason Washington wants a lower oil price is to deprive Moscow of oil revenue. Biden travelled to Riyadh this year but failed to secure any firm cooperation commitments on energy. Relations have been further strained as Saudi Arabia has not condemned Moscow's actions in Ukraine.
Saudi Energy Minister Abdulaziz bin Salman said OPEC Plus had needed to be pro-active as central banks around the world moved to "belatedly" tackle soaring inflation with higher interest rates.
Wednesday's production cuts of 2 million bpd are based on existing baseline figures, which means the cuts would be less deep because the cartel fell about 3.6 million barrels per day short of its output target in August.
Under-production happened because of Western sanctions on countries such as Russia, Venezuela and Iran and output problems with producers such as Nigeria and Angola.
Analysts from Jefferies said they estimated the figure at 0.9 million bpd, while Goldman Sachs put it at 0.4-0.6 million bpd saying cuts would mainly come from Gulf OPEC producers such as Saudi Arabia, Iraq, the United Arab Emirates and Kuwait.
