Crude oil production from the OPEC+ alliance slumped by as much as 439,000 barrels per day in January compared to December as a major supply disruption in Kazakhstan added to lower output from Iran and Venezuela, OPEC data showed in its Monthly Oil Market Report (MOMR). Total OPEC+ crude oil production averaged 42.45 million barrels per day (bpd) in January 2026, down by 439,000 bpd versus December, as Kazakhstan’s output plummeted by 249,000 bpd, according to the OPEC estimates based on secondary sources. Kazakhstan’s…