Subsea Pump Control System
Optimal operation of the subsea boosting system
Accelerate response times while safely monitoring and controlling pumps.
Uses less energy than topside compression (about 2.9 TW.h or 67% less for a gas subsea tieback of 120 km with 95% uptime across 10 years; savings variable from one application to another)
Decreases CO2e emissions compared with topside compression (about 1.44 million metric tons or 67% less CO2e for a gas subsea tieback of 120 km with 95% uptime across 10 years; savings variable from one application to another)
Lowers your impact with about half the weight of a conventional subsea compression system
While greater recovery, accelerated production, and fast return on investment have been the primary motivators for use of subsea compression technology, it also offers greater energy efficiency and a reduced CO2 footprint. The energy savings potential increases with tieback distance, water depth, and complex production assurance challenges.
Adding compression compensates for the losses generated in the production line between the subsea wells and the topside host. Subsea compression’s role in unlocking gas resources and improving the economics of subsea gas development is becoming more critical with the increasing focus on sustainability.
Compared with the option of lowering the near-end pressure using topside technology, compressing gas near the start of a long production flowline (where gas pressure is higher) can be significantly more energy-efficient—with correspondingly lower CO2 emissions—over the productive life of the asset.
Subsea multiphase compression systems are the most effective method of enhancing gas production for underwater applications. Essentially, compression is a mechanism for transferring energy to the production stream to overcome losses during extraction and transport.
Our award-winning subsea multiphase compressor is the world’s first and only true subsea wet gas compressor. Incorporating two contrarotating shafts, it is specifically designed for pressure boosting an unprocessed well stream. The unique configuration enables a compact and robust design that is based on OneSubsea’s proven multiphase boosting pumps.
The compressor can operate in any flow regime—with liquid fractions ranging from 0% to 100%—and tolerates sand and solids. Its low speed enables long step-outs without subsea variable speed drives, and the low module weight—approximately 60 metric tons—enables intervention with light vessels.
Total system solutions ensure that all risks are identified and mitigated in the early stages of field development planning. These solutions include all the equipment needed to operate the pumps during startup, shutdown, and normal flowing conditions; they are combined with operational support to provide complete system availability.
In this article, Mads Hjelmeland, Head of Processing Systems Projects at OneSubsea, discusses developments in subsea processing, boosting, and compression and their role in driving low-carbon production systems amid the global energy transition.
Eliminate requirements for upstream separation or antisurge systems.
Schlumberger announced today an award to OneSubsea by A/S Norske Shell of a frame agreement for an engineering, procurement, construction and installation (EPCI) contract for the supply of a subsea multiphase compression system for the Ormen Lange Field in the Norwegian Sea.
Upstream technologies recognized for excellence in innovative concept, design and application.