Page 22: of Offshore Engineer Magazine (Jul/Aug 2025)

21 23

POWER FPSOs AND GAS TURBINES

Lars Morkin © Equinor

Figure 1:

Johan Castberg FPSO

POWERING DEEPWATER

PRODUCTION

Designing Gas Turbines for Modern FPSOs

By Philipp Geipel and Atif Aliuddin, Siemens Energy reventing unplanned downtime of rotating modern FPSOs. equipment assets, such as gas turbines and An example of this is the SGT-750 industrial gas tur- compressors, is important to success in the bine, which recently began operation on the Johan Cast- offshore production environment. This is par- berg FPSO (Figure 1) in the Barents Sea, where it is be- ticularly the case for felds located in harsh ing used to drive two DATUM centrifugal compressors in

P environments and highly remote locations, where the cost 1x100% service (i.e., with no backup). The compressors and complexity of performing maintenance and repairs is reinject gas into the reservoir, providing pressurization and often magnifed. At the same time, tightening environmen- eliminating the need for capture or faring, the latter of tal regulations, coupled with voluntary commitments from which is not permissible in the region. offshore operators to decarbonize, has increased focus on This article highlights several unique features of the the fuel effciency and emissions footprint of prime movers. compression train installed on Johan Castberg and discuss-

Companies have taken strategic steps in recent years es how the SGT-750 is supporting offshore requirements to help the industry address these challenges by design- for low emissions and high availability in both direct drive ing rotating equipment packages to meet the demands of and power generation applications. 22 OFFSHORE ENGINEER OEDIGITAL.COM