The Switzerland-based offshore specialist Allseas has announced that the Brazilian oil major Petrobras has contracted the company to deliver a rigid riser-based subsea solution for the ultra-deepwater Ataptu-2 pre-salt field development, 230 kilometers offshore Rio de Janeiro, Brazil.
Allseas secured this contract through a competitive Petrobras tender, and the contract covers design, procurement, construction and installation of 143 kilometres of rigid risers and flowlines in water depths exceeding 2000 meters, where the subsea network will connect 18 wells to a new FPSO via steel catenary risers in a ‘lazy wave’ configuration.
The scope of work contracted by Petrobras also includes critical components such as flex-joints, pipeline end terminations and jumpers to complete the connections.
The offshore work is scheduled to begin in Q1 2029 and will be executed by Allseas’ pipelay vessel Audacia.
This new contract award follows the Búzios-10 contract announced earlier this year, which covers 111 kilometres of rigid risers and flowlines linking 16 wells to a FPSO. While similar in size and complexity, Atapu-2 is larger in scope, with additional wells and longer pipeline systems. Together, these two contracts rank among the largest and most technically complex in Allseas’ 40-year history, as the company mentions.
Allseas states that in order to support both projects the company has expanded its project management and engineering presence in Rio de Janeiro, which serves as the strategic hub for their operations in Brazil. Preparations are underway to award subcontracts for seamless linepipe manufacturing, internal cladding and flexible joints for the steel catenary risers, further strengthening the local supply chain.
“This award demonstrates Petrobras’ confidence in Allseas’ proven capability to execute large-scale, technically complex projects safely and efficiently. We are proud to contribute to the continued development of Brazil’s offshore resources and to strengthen our engagement with local suppliers and talent,” says André de Melo, Allseas General Manager Brazil.
