In remote and ultra-deep waters, power generation for large field developments is demanding. By centralising and sharing the power generation between several production units, DNV has created a new concept that can reduce both emissions and costs.
Depending on how it is implemented, the cost saving may also be complemented by enhanced production capacity. The power generation arrangement may reduce CO2 emissions with approximately forty per cent.
OPera
The concept, Offshore Power system for a new era (OPera), provides several potential benefits for the connected units. The need for topside processing power generation at each and every unit is eliminated, and available deck space can be increased. Significant increases in revenue could potentially be achieved with the installation of additional processing capabilities, resulting in more oil production from the same size installation. With its centralised location, OPera allows improvements in operational logistics, by consolidating the location of power generation personnel, maintenance and spare parts.
How It Works
The power hub has a gas fired combined cycle power plant that increases power generation efficiency by more than fifteen per cent, compared with conventional gas turbines alone. By consolidating power generation, the power hub also allows equipment to run at more optimal load. This further reduces fuel consumption and overall emissions. The power hub is fueled by associated gas or parts of the export gas produced.
Multiple Options
- The OPera power hub can be designed in different variants, and can also serve as a logistical hub, a centralised CO2 removal unit, or part of offshore LNG production.
- The OPera concept is highly flexible in size and configuration, making it relevant for different types of fields. The power plant consists of modular gas and steam units of 50 and 100 MW capacities, allowing the combined capacity to be tailored.
- Depending on water-depth, different platform and hull-designs can support the power plant. The power hub can connect with different numbers and types of installations.
Read more about OPera in the DNV brochure on the DNV website.
Illustration: Centralised power generation with OPera (by DNV)
