Treating seawater at the seabed allows for a very effective disinfection and removal of particles, solving the traditional maintenance intensive topside solutions. Moving water treatment from topside to the seabed reduces weight and space requirements topside and simplifies the process significantly since weight and space are no longer an issue. At the seabed, Seabox™ is a system without any moving parts and filters, and is significantly simpler than the traditional topside systems.

Treated seawater has many applications. Platform topside process systems require large volume of waters for cooling and traditional topside water systems are rather maintenance intensive. Treated seawater for water injection into the reservoir is another high-volume application.

The Seabox™ is a unique system that ensures proper disinfection of water and removal of particles for different applications. Water quality for water injection into the reservoir may require further treatment of the water, like removing all suspended solids, removing sulphate or producing low salinity water. Part of the quality specifications are for protecting the reservoir and facilities, other parts are for changing conditions in the reservoir to increase production and oil recovery.

No chemicals are added in the water treatment at seabed, the required chemicals for the disinfection are produced in the Seabox™. The subsea solution is more energy efficient, resulting in less cost and reduced CO2 footprint. Maintenance is limited to an intervention every fourth year.

The focus of this presentation is the subsea water treatment and value proposition related to water intake.