Hebron GBS | Canada
Hebron demonstrates North Sea–style gravity-base technology adapted for iceberg impact protection and large integrated oil storage. The GBS delivers a robust, long-life foundation for production in one of the world’s harshest offshore environments.
Extreme weather and large icebergs
- Location: Offshore Newfoundland and Labrador, Canada
- Water depth: 93 m
- Project period: 2011–2015
- Client / Operator: ExxonMobil
- Structure type: Concrete gravity-based structure (GBS) with integrated crude oil storage
Engineering and construction of a concrete gravity-based structure that is fixed to the seabed by self-weight, designed to support a large topside and withstand extreme metocean conditions and iceberg impacts.
The delivery model combined industrialized civil construction (dry-dock slip-forming and completion while floating) with planned marine operations for tow-out, set-down and topside mating.
- Built for ice and harsh environmental loads
- High structural robustness and durability
- Integrated storage ~1.2 million bbl
- Strong HSE performance >40 million hours with no lost‑time injuries
- Water depth: 93 m
- Concrete volume: ~130,000 m³
- Reinforcement: ~45,000 tonnes (~350 kg/m³)
- Post-tensioning steel: ~3,500 tonnes
- Construction start: 2012
- Tow-out to deepwater construction site: 2014
- Topside mating: 2016
- First oil: November 2017