Offshore wind

Offshore Wind Farm Integrated Into Subsea Field Development

A system was designed to extend the offshore wind-energy concept from the power grid to a subsea field-development application. The system integrates a floating foundation with a wind-turbine generator, with all the required utilities hosted directly onboard the same floater.

ogf-2020-11-tech-syn-hexafloat-hero.jpg
Typical floater arrangement with basket, tendons, and substructure. Credit: OTC 30721.

Operators are moving active production and injection equipment onto the seabed with the aim of reducing capital expenditures (CAPEX) or topside space requirements. Moreover, they want to minimize new production floating facilities. Given this scenario, overall electric power needs may become an issue because of the extra power demand caused by the increasing number of electric consumers placed subsea. The complete paper discusses a floating wind-turbine solution that is particularly cost-competitive for deepwater locations and that can unlock the possibility of deploying large wind-powered generators far from the coastline in deep water.

Introduction

Saipem launched an initiative aimed at finding a solution for the management of subsea field-power demand, bearing in mind two primary considerations:

  • Minimize CAPEX by reducing the distance between the subsea-field production location and the topside equipment supporting this production
  • Decarbonize the field by adopting a renewable energy source

Concept Background and Potential Application

The operator has developed a floating substructure technology for offshore wind farms known as HexaFloat.

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