Offshore Production And Test Ship Delivered By NKK To Norwegian Owner

The Petrojarl I, said to be the world's first purpose-built, floating offshore oil production and testing system, was completed recently at the Tsurumi Works of Nippon Kokan (NKK) in Japan and delivered to K/S Petrojarl A/S. The vessel will enter North Sea service this summer, operated by Golar-Nor Offshore A/S of Trondheim, Norway, a limited partnership consisting of Fearnleys, Gotaas-Larsen Shipping, Laly, and Norcem.

Designed for well testing and early production, the Petrojarl I can operate in water up to 2,132 feet deep and under severe sea and weather conditions. With a dynamic positioning system and eight anchors, it can maintain an optimum heading at all times, while its turret mooring system permits the riser pipe from the well to remain unaffected by any movement from waves, wind, and current.

The vessel has an overall length of 587.4 feet, beam of 105 feet, depth of 50.5 feet, and draft of 39.4 feet.

Daily production capability is 30,000 barrels, with storage capacity of 188,000 barrels. Shuttle tankers will transport the oil to onshore terminals at regular intervals.

Electrical power is supplied by four duel-fuel (gas/diesel) turbines, each driving a 2,800-kw generator; two diesel generators, each rated 1,500 kw; and emergency generator in the forward part of the vessel rated 500 kw.

Accommodations for 60 persons are provided in 16 single and 22 double air-conditioned cabins, all with shower and toilet. A helideck above the bow is designed to handle a Boeing 234 Chinook helicopter.

The Petrojarl I will provide testing and recording of reservoir data from one or several wells, for better planning of depletion strategies and permanent production facilities.

Early production of larger fields prior to installation of permanent facilities will allow verification of depletion strategies and improved cash flow. Attractive economics, including minimal initial investment, will encourage exploitation of fields that are sub-commercial at present, due to small reserves, hetrogeneities, short production lives, or unproven production characteristics.

The vessel is classed by Det norske Veritas 1A1 Mobile Offshore Unit and also has the additional notation Production and Storage Vessel or Tanker for Oil. It meets the Norwegian Maritime Directorate rules for drilling vessels and the Norwegian Petroleum Directorate rules for production facilities. It also meets or exceeds the applicable regulations of the U.K. Department of Energy, the U.S. Coast Guard, and the International Maritime Organization.

Maritime Reporter Magazine, page 49,  Aug 1986

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