This 14 September 2019 video says about itself:
Saudi Arabia: major fire at world’s largest oil refinery after drone attack
Drones attacked the world’s largest oil processing facility in Saudi Arabia and a major oilfield operated by Saudi Aramco early on Saturday, the kingdom’s interior ministry said, sparking a huge fire at a processor crucial to global energy supplies.
Translated from Dutch NOS TV today:
Saudi state oil company Aramco has almost halved its oil production after last night’s drone attack on a big refinery and an oil field. Sources said that to Reuters news agency and The Wall Street Journal.
Production is said to have been reduced by around 5 million barrels per day, or around 5 percent of world production. The Saudi authorities have not confirmed the report. However, shortly after the attack, the state television reported that the export continued as usual.
The responsibility for tonight’s attack has been claimed by the Houthi rebels in Yemen. According to a spokesperson, it was a retaliation for Saudi Arabia’s involvement in the war in Yemen. The Saudis are leading a coalition that is fighting a violent war …
The affected Buqaiq oil refinery, near the Persian Gulf, is said to be the biggest in the world. The also attacked Khurais oil field lies more towards the capital Riyadh and is the second biggest in the country.
After the attack, which, according to the Houthis, was carried out with ten drones, huge fires started. … Nobody was injured.
The reduced production has no immediate impact on the oil price, as the stock exchanges are closed worldwide due to the weekend.