The Dutch firm will be responsible for the integrated engineering, preparation, removal, and disposal (EPRD) of the two platforms.
Installed by Heerema in the 1990s, the Ketch and Schooner platforms are tied-back to the Murdoch complex.
Heerema Marine Contractors is also under contract to remove the Murdoch complex.
Heerema decommissioning director Michel Hendriks said: “Heerema is proud to be the contractor of choice for the decommissioning of the Ketch and Schooner platforms. The EPRD award is the result of our ambition to remove offshore structures of all sizes in a safe and sustainable manner.
“We are especially pleased to contribute to the circularity of the project by being the installation and removal contractor, which is in line with our own sustainable circular ambitions.”
Heerema said that the Ketch and Schooner platforms, after removal, will be disposed of responsibly. It will later be reused or up to 97% of it will be recycled.
Heerema Marine Contractors is particularly involved in the transportation, installation and removal of offshore infrastructure.
Aker will be responsible for the reception, dismantling, and recycling of three offshore installations from the Heimdal and Veslefrikk fields.
The contract was awarded after Heerema Marine Contractors was contracted by Equinor for the decommissioning of the three offshore installations.