The heaviest oil platform ever constructed is the Troll A platform, a concrete structure located in the North Sea off the coast of Norway. Weighing over 683,600 metric tons, the Troll A platform is an engineering marvel. It stands at a height of 472 meters (1,549 feet) and has a base area of 450 meters by 260 meters (1,476 feet by 853 feet). The platform's construction began in 1991 and was completed in 1996. It serves as an offshore production facility for natural gas and condensate, and its production capacity is approximately 1 billion cubic feet of gas per day and 120,000 barrels of condensate per day. The Troll A platform is a testament to human ingenuity and the ability to push the boundaries of engineering to meet the demands of the energy industry.
