The Reuters survey shows that OPEC's oil production in December decreased after two consecutive months of growth, with the UAE and Iran cutting production due to oilfield maintenance, offsetting increases from Nigeria and other member countries. The survey indicates that OPEC's daily production last month was 26.46 million barrels, a decrease of 0.05 million barrels compared to November, with the UAE experiencing the largest decline, reducing its daily production by 0.09 million barrels to 2.85 million barrels. Iran's production fell by 0.07 million barrels. The two largest oil-producing countries in OPEC, Saudi Arabia and Iraq, maintained stable production. Among the countries that increased production, Nigeria's daily production rose by 0.05 million barrels, reflecting increased domestic consumption and exports from refineries such as Dangote. Libya's production also increased by 0.05 million barrels as oil production continues to recover following the resolution of disputes over central bank control.