The Brent Field, lying 186km north east of the Shetland Islands, is one of the largest fields in the North Sea, and has three gravity base structures, Bravo, Charlie and Delta, and one steel jacket – Alpha. It is a 50:50 joint-venture between Shell, as operator, and Esso. Decommissioning Brent is a complex, major engineering project, because of its size, age, infrastructure and the harsh environment of the North Sea.
Brent Delta ceased production 2011, Alpha and Bravo in 2014, and Charlie is still in production. The Delta topside was removed in a single lift in 2017 by Allseas’ vessel Pioneering Spirit, and taken to Able UK’s facility in Hartlepool, North East England, where over 97% has been recycled.
Brent Bravo’s 25,000t topside was lifted in June 2019, by the Pioneering Spirit.