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Offshore/subsea systems

Combined-Cycle Approach Holds Potential for Offshore-Facility Carbon Capture

This paper describes the potential of combined-cycle technology (use of a gas turbine and a steam turbine together to turn fuel into electricity) in offshore carbon-capture applications.

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September 1, 2026
Journal of Petroleum Technology
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Fig. 1—(Left) Simple-cycle power plant with four gas turbines and WHRUs; (right) combined-cycle arrangement with equal heat and power capability in typical FPSO modules (22×22 m).
Fig. 1—(Left) Simple-cycle power plant with four gas turbines and WHRUs; (right) combined-cycle arrangement with equal heat and power capability in typical FPSO modules (22×22 m).
Source: SPE 225466.

Floating thermal power plants implementing CO2 capture and storage (CCS) provide clean power and enhanced oil recovery to the offshore oil and gas industry. Some have used combined-cycle technology, in which gas turbines (GTs) and steam turbines (STs) are used together to convert fuel into electricity. The complete paper describes the potential of combined-cycle technology in CCS applications for offshore facilities.

Features of Combined Cycle With Exhaust-Gas Recycling (EGR) and CCS

Most offshore installations use GTs to power the facility. The process-heat requirement normally is covered by heat recovery from the GT exhaust.

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