Petronius is a deepwater compliant tower oil platform operated by Chevron
Corporation and Marathon Oil in the Gulf of Mexico, 210 km southeast of New Orleans, United States.
A compliant piled tower design, it is 609.9 metres (2,001 ft) high, and was arguably the tallest free-standing structure in the world, until surpassed by the Burj Khalifa in 2008, although this claim is disputed since only 75 metres of the platform are above water. The multi-deck topsides are 64 metres by 43 metres by 18.3 metres high and hold 21 well slots, and the entire structure weighs around 43,000 tons. Around 8,000 m3 (50,000 barrels) of oil and 2,000,000 m3 (70 million cubic feet) of natural gas are extracted daily by the rig.