The Hebron gravity base structure (GBS) consists of a reinforced concrete base designed to withstand sea ice, icebergs and meteorological and oceanographic conditions, with an integrated topsides deck which includes a living quarters and facilities to perform drilling and production. A substantial portion of the topsides was engineered and fabricated in Newfoundland and Labrador.
The Hebron GBS is designed to store approximately 1.2 million barrels of crude oil.
Bull Arm construction site preparation work began in the fall of 2011. In October 2012, skirt installation began, marking the official start of GBS construction. In March 2013, a ceremonial cutting of the topsides “first steel” was performed. On July 22, 2014, construction of the Hebron GBS achieved a major milestone with the tow-out of the 27.5-metre-high concrete base to the deepwater site located three kilometres from the Bull Arm drydock. Moored in 150 metres of water, concrete slip-forming continued until the GBS reached its full height of 120 metres.
By November 2016, concrete pouring on the GBS was complete and all topsides modules had been assembled at the pier in Bull Arm. Mating of the concrete base and topsides took place at Bull Arm's deepwater site on December 13 and 14, 2016. Towout and installation of the completed platform at the offshore field is scheduled for 2017, with first oil anticipated later that year.
A 90 second time-lapse video documenting construction of the Hebron GBS in Bull Arm, Newfoundland and Labrador can be viewed here.
Status: In development
Project sanction: December 31, 2012
First oil: Scheduled for late 2017
Production life: Estimated 30 years
Hebron is in the Jeanne d’Arc Basin and is located 350 km (217 mi) southeast of St. John’s, NL. It consists of three discovered fields: Hebron, West Ben Nevis and Ben Nevis.
Water depth: 93 m (305 ft)
Estimated recoverable oil reserves:
707 million barrels
Operator: ExxonMobil Canada Properties
ExxonMobil Canada Properties – 36%
Chevron Canada Resources – 26.7%
Suncor Energy – 22.73%
Statoil Canada – 9.7%
Nalcor Energy – 4.9%
Mode of development: GBS supporting drilling, production and accommodation facilities; storage capacity - 1.2 million barrels of crude oil
For further information:
ExxonMobil Canada - Hebron Project
215 Water St., Suite 701
St. John’s, NL A1C 6C9
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