Hibernia is an oil field in the North Atlantic Ocean, approximately east-southeast of St. John's, Newfoundland, Canada, in 80 m of water. The production platformHibernia is the world's largest oil platform and consists of a integrated topsides facility mounted on a gravity base structure. The platform was towed to its final site, and of solid ballast were added to secure it in place. Inside the gravity base structure are storage tanks for of crude oil.
Exploration drilling to map the field began in the 1960s and continued into the 1980s, with the loss of the Ocean Rangermobile offshore drilling unit in the process. In the mid-1980s, a new Conservative federal government under Brian Mulroney pledged that then Crown corporationPetro-Canada would be a lead player in creating a commercially viable offshore development on the Hibernia field. Hibernia would become one of a series of regional "mega-projects" that Mulroney's government started across Canada during this time.
Development
Following several years of aborted startup attempts, during which time the federal government was forced to increase its liability stake in the project by forming the Crown corporation Canada Development Investment Corporation, the Hibernia megaproject began construction of the production platform and gravity base structure in the early 1990s. The Hibernia offshore oil field is owned jointly by ExxonMobil Canada, Chevron Canada Resources, Suncor, Canada Hibernia Holding Corporation, Murphy Oil and StatoilHydro Canada Ltd. As the Hibernia field is located in an inhospitable environment consisting ofrogue waves, fog, icebergs and sea ice, hurricanes, and nor'easter winter storms, engineering analyses determined that the most appropriate drilling platform would be in the form of a gravity base structure. The Hibernia GBS sits on the ocean floor approximately depth with its topsides extending approximately out of the water. The platform acts as a small concrete island with serrated outer edges designed to counter icebergs. The GBS contains production storage tanks for 1.3 million barrels of oil in an 85 m high caisson, with the entire structure weighing 587,000 tonne before 450,000 tonnes of solid ballast were added. The GBS was constructed in Bull Arm and the "topsides" production and living quarters was attached to the base while floating in Bull Arm, before the integrated unit was towed out to the actual Hibernia field. Production commenced on November 17, 1997. A dedicated fleet of shuttle tankers continuously operates between the platform and an onshore transshipment facility at Whiffen Head, adjacent to the Come By Chance Refinery. During peak construction in 1995, 5800 workers were employed. Many of these people received training in construction management and high technology. Others received an upgrading of their skills as a result of this project. The development of Hibernia involves a considerable amount of drilling services. As of January 1, 2007, over 50 development wells have been successfully drilled from the platform, including a Canadian record "extended reach drilling" well. The platform always has at least one logistics support vessel in attendance, which shuttle supplies and provides on-station emergency support. These support vessels are also tasked during the spring and summer months to tow small and medium-sized icebergs which might collide with the platform, even though the GBS is engineered to withstand such a hit. The crew consists of 280 people who spend 3 weeks on the platform and three weeks on land, flown to and from the platform by helicopter. The platform has been used to refuel CH-149 Cormorantsearch and rescue helicopters on long-range missions in the North Atlantic.
Production
The Canada-Newfoundland and Labrador Offshore Petroleum Board listed the total oil field production at as of August 2010. The same update listed the Proven and Probable estimated reserves as being of oil.
