Allseas awarded Atapu-2 subsea contract by Petrobras

Petrobras contracted Allseas to deliver a rigid riser-based subsea solution for the ultra-deepwater Ataptu-2 pre-salt field development, 230 km offshore Rio de Janeiro, Brazil.

The contract covers design, procurement, construction and installation of 143 km of rigid risers and flowlines in water depths exceeding 2000 m. The subsea network will connect 18 wells to a new FPSO via steel catenary risers in a “lazy wave” configuration. The scope also includes critical components such as flex joints, pipeline end terminations and jumpers to complete the connections. Offshore work is scheduled to begin in Q1 2029 and will be executed by Allseas’ pipelay vessel Audacia.