Offshore staff
STAVANGER, Norway – Techouse has completed work on a lightweight sulfate removal module that will help protect subsea production wells on Equinor’s Johan Castberg field in the Barents Sea.
Front-end engineering and design started three years ago.
Techouse’s technology will remove sulfate present in seawater before it is injected into Castberg’s reservoir, reducing the risk of sulfate scaling.
It comprises three filtration systems combined in one unit with the capacity to treat more than 180,000 b/d of seawater, similar to the field’s anticipated daily oil production.
The compact, 1,300-metric ton (1,433-ton) module will occupy half the width of the FPSO, which will be 55 m (180 ft) wide and 295 m (968 ft) long.
Johan Castberg is 240 km (149 mi) northwest of Hammerfest, northern Norway. To withstand extreme cold in winter, the module can be heated if necessary.
According to Techouse, the sulfate reduction unit, with more than 100 sequences, will be one of the most complex modules on the FPSO.
Currently the company and Equinor are testing the control sequences before the module leaves the yard in Egersund this fall.
06/09/2020
