The mating operation was completed entirely to plan, and all that remained before the platform could begin its journey north was to hook up piping and cable systems. The maximum permitted deviation from an ideal match of topsides and shaft was a mere 40 millimetres – so accuracy was essential in all stages of the operation.Īs large volumes of water were pumped from its storage cells, the GBS rose, took over the weight from the barges and continued to raise the topsides high above the sea surface. Mating was accomplished by manoeuvring the barges into position over the concrete shaft and deballasting the gravity base structure (GBS). Photo: Dag Magne Søyland/Norwegian Petroleum Museum bygging av betongdelen til plattformen, engelsk, plattformen plasseres på feltet, The topside was mated with the GBS in Yrkjefjorden. On 6 March, this structure was transferred to two huge barges and towed to Vats by five tugs. In the meantime, the topsides were being completed at Stavanger’s Rosenberg Verft yard. Photo: A/S Norske Shell/Norwegian Petroleum Museum plattformen plasseres på feltet, engelsk, The topside is placed on two huge barges and towed to Vats by five tugs. This operation was a nervous time, with the Sleipner sinking (see separate article) the year before still fresh in the minds of most people present. On 24 March, the concrete structure underwent a trial submersion which left only a few metres of the shaft visible above the sea surface. The Condeep monotower was readied in March 1993 to receive the topsides, which were to be towed from Stavanger to the deepwater mating site at Vats. bygging av betongdelen til plattformen, plattformen plasseres på feltet, forsidebilde The GBS raises high against the sky where it is located in Yrkjefjorden, soon ready to be mated with the topside. It was also the first fixed installation to be positioned above the 62nd parallel – making the tow-out the longest to date on the Norwegian continental shelf (NCS). The contract also includes four one-year extension options.To start with, the platform ranked at the time as the tallest structure ever towed. The drilling contractor will execute the contract by deploying semi-submersible drilling rigs. Its production stood at 17,500boepd in 2020.ĬOSL Drilling Europe was awarded a four-year frame contract for providing drilling services on the Norwegian Continental Shelf for OKEA in May 2021.Īs part of this contract, COSL Drilling Europe is expected to drill the planned single development well for the Hasselmus project. The Draugen field is situated approximately 140km northwest of Kristiansund, Norway. Both the Draugen field and the Hasselmus gas discovery are located in PL 093 in the south Norwegian Sea.ĭiscovered in 1984, the Draugen oil field commenced operations in 1993. The Hasselmus field development will be the first tieback to the Draugen platform. The oil is transported from the storage cells via pipelines to a floating loading-buoy which loads oil to the shuttle tankers for onshore export. The platform consists of oil storage cells located at the base of the GBS. The topsides on the platform include well stream processing facilities, utilities, as well as accommodation facilities. The water depth in the area is approximately 251.3m and the height of the GBS is approximately 285.1m. The topside modules of the Draugen platform sit on a single-shaft concrete gravity base structure (GBS) based on the Condeep design. The well stream will be processed at Draugen platform which is located approximately 7km southeast of the Hasselmus gas discovery. The Hasselmus field development involves the drilling of a single subsea well, installation of the associated subsea infrastructure, and a tieback to the Draugen platform. The field’s reservoir comprises the Early Jurassic sandstones of the Ror and the Ile Formations. The well encountered a 16m gas column and a 6.8m oil column. The offshore gas field was discovered through the drilling of the Hasselmus wildcat well, 6407/9-9 by Norske Shell in 1999. The water depth in the area is approximately 250m. The Hasselmus field is located in blocks 6407//9H within PL 093 in the south Norwegian Sea, Norway. Location, discovery, and reservoir details Neptune Energy picked up a 7.56% interest through the acquisition of VNG Norge in September 2018. OKEA acquired a 44.56% interest in production licence 093 and assumed operatorship of the Draugen field from Norske Shell in November 2018.
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