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Oseberg ((ノルウェー語:Osebergfeltet)) is an offshore oil field with a gas cap in the North Sea located northwest of the city of Bergen on the southwestern coast of Norway. The field, which is 25 km long by 7 km wide,〔 was discovered in 1979 and its development is known to be one of the significant milestones in emergence of Norway's independent oil and gas industry.〔(OLJEDIREKTORATET Norwegian Petroleum Directorate. Oseberg )〕〔 〕 The Oseberg field was named after Oseberg ship, one of Norway's most significant archeological discoveries. The ancient Viking ship from the early 9th century was discovered in a 1904 historical excavation of a burial mound at the Oseberg Farm, south of Oslo.〔 〕 An extensive subsea pipeline network called Oseberg Transport System (OTS) transports up to from the Oseberg area to Sture terminal in Norway.〔(Oil Pipelines in Norway and Downstream Activities )〕 The sea depth in the Oseberg area is 100 meters. The Oseberg Field Centre consists of three platforms: Oseberg A, B and D, connected to each other by bridges, in the southern part of the Oseberg field and the Oseberg C platform, which is located 14 kilometers north of the field center. The operator is Statoil, in partnership with Petoro, Total, ExxonMobil and ConocoPhillips.〔 The field extends into blocks 30/6 and 30/9, parts of Production licenses (PL) 053 and 079.〔 ==Exploration history== The first exploration well on the PL053 license, 30/6-1, was drilled as a wildcat and spudded on 19 June 1979. The well was plugged and abandoned as a gas discovery on 22 September. Subsequent appraisal wells proved oil in addition to the gas found by the discovery well and Oseberg was produced as an oilfield. The first exploration well on the PL079 license, 30/9-1 was drilled as a wildcat at the end of 1982, but treated as an appraisal after it encountered oil and gas considered to form part of the same accumulation.〔 In 2006, well 30/9-B-19 A proved reserves in the underlying Upper Triassic to Lower Jurassic Statfjord formation.〔 〕 Tests are also being carried out on the overlying Upper Cretaceous Chalk Group reservoir to evaluate the flow characteristics.〔 The vertical gas column in the Alpha block was 380 m while the underlying oil column was about 215 m before production began.〔 A total of 31 exploration and appraisal wells have been drilled on the Oseberg structure, although this includes sidetracks and re-entries. Of these wells, only three proved 'dry'.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Oseberg oil field」の詳細全文を読む スポンサード リンク
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