The United States last week said the cut would boost Russia's foreign earnings and suggested it had been engineered for political reasons by Saudi Arabia, which denied it was supporting Moscow in its invasion of Ukraine.
Saudi King Salman bin Abdulaziz said the kingdom was working hard to support stability and balance in oil markets, including establishing and maintaining agreement of the OPEC Plus alliance.
The Saudi Defence Minister, Prince Khalid bin Salman, King Salman's son also said the October 05 decision to reduce output by 2 million barrels per day (bpd) - despite supply tightness in oil markets - was unanimous and based on economic factors.
His comments were backed by ministers of several OPEC Plus member states including the United Arab Emirates.
The UAE's Energy Minister, Suhail al-Mazrouei, wrote on Twitter,"I would like to clarify that the latest Group decision, which was unanimously approved, was a pure technical decision, with NO political intentions whatsoever."
His comment followed a statement from Iraq's state oil marketer SOMO.
"There is complete consensus among OPEC Plus countries that the best approach ...is a pre-emptive approach that supports market stability and provides the guidance needed for the future," a SOMO statement said.
Kuwait Petroleum Corporation Chief Executive Nawaf Saud al-Sabah also welcomed the decision by OPEC Plus and said the country was keen to maintain a balanced oil market, state news agency KUNA reported.
Oman and Bahrain echoed the comment in separate statements.
Algerian energy minister Mohamed Arkab, meanwhile, called the decision historic and said that he and OPEC Secretary General Haitham Al Ghais expressed full confidence in it, Algeria's Ennahar TV reported.
In a statement to Reuters on Monday, Arkab said the OPEC Plus decision, was a purely technical response based on purely economic considerations.
Oil inventories in major economies are lower than when OPEC has cut output in the past. Some analysts have said that recent volatility in crude markets could be remedied by a cut that would help attract investors.
Umer Karim, a research fellow at the University of Birmingham, said OPEC countries are attempting to project unity.
"The emphasis on the word technical also suggests that these member states are sending a message to the US that they are not a party in this row between Riyadh and Washington," Karim said.
US National Security Council spokesman John Kirby on Thursday said that more than one" OPEC member had felt coerced by Saudi Arabia into the vote, adding that the cut would also increase Russia's revenue and blunt the effectiveness of sanctions imposed over its invasion of Ukraine.
King Salman said in an address to the Kingdom's Advisory Shura Council that the country was a mediator of peace and highlighted the crown prince's initiative to release prisoners of war from Russia last month.
Khalid bin Salman said he was astonished by claims his country was standing with Russia in its war with Ukraine.
