(Bloomberg) -- Saudi Aramco showed it has made significant progress in restoring its Khurais oil field to normal operations a month after a devastating aerial attack halted production.

A visit to the site revealed gleaming stabilization towers, four of which were damaged in the strike by missiles and drones on Sept. 14. While one of the towers shown to reporters remained a charred wreck, Aramco insisted that Khurais is now able to operate at full capacity for limited periods.

Workers at the state-run oil giant worked 24 hours a day to restore supply after the attacks on Khurais and the Abqaiq processing plant disabled 5% of global supply. A trip to Khurais a week after the assault showed equipment scorched and ruptured, with several stabilization units -- 90-meter (300-foot) towers that reduce pressure and remove gas from the crude -- burnt out.

Yet Aramco made surprisingly swift progress with repairs, returning production to pre-attack levels by the end of last month. Oil prices, having surged the most on record immediately after the strikes, gave up their gains as traders turned their attention to slowing economic growth and demand concerns.

The Khurais field has a maximum output capacity of 1.45 million barrels a day. It’s now technically possible to operate at full capacity, which Aramco proved by running the site flat out for about a day, an official said on Saturday.

Saudi and U.S. officials said that the drones and missiles used in the attack were made by Iran, though Tehran denied involvement. The incident ratcheted up instability in the world’s most important oil-producing region, where tensions increased further on Friday as Iran said missiles had struck one of its tankers in the Red Sea.

--With assistance from Anthony DiPaola.

To contact the reporter on this story: Dina Khrennikova in Moscow at dkhrennikova@bloomberg.net

To contact the editors responsible for this story: James Herron at jherron9@bloomberg.net, Amanda Jordan, James Amott

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