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  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 2617,
    "wlbName" : "31/4-10",
    "wlbHistory" : "\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cb\u003e\u003cspan lang=EN-GB\u003eGeneral\u003c/span\u003e\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eWell 31/4-10 was drilled to appraise the\r\nBrage Field on the Bjørgvin Arch in the North Sea. The main objective was to\r\nconfirm hydrocarbons in the Sognefjord Formation. The secondary objectives were\r\nto obtain information about reservoir properties and stratigraphic development\r\nof the Fensfjord and Krossfjord Formations.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cb\u003e\u003cspan lang=EN-GB\u003eOperations and results\u003c/span\u003e\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eAppraisal well 31/4-10 was spudded with\r\nthe semi-submersible installation West Vanguard on 14 November 1995 and drilled\r\nto TD at 2342 m in Middle Jurassic sediments in the Heather Formation. The well\r\nwas drilled and logged without significant problems. It was drilled with spud\r\nmud down to 1010 m and with KCl/polymer mud from 1010 m to TD.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eA 21 m thick Draupne Formation was\r\npenetrated from 2004 m to 2025 m. The Sognefjord Formation was encountered at\r\n2025 m and a total of 4.7 m net pay was calculated in the interval between\r\n2038.0 m and 2044.9 m. The average oil saturation over this interval is\r\nestimated to 50.6 %. The average porosity is calculated to 23 %. MDT pressure\r\nmeasurements gave an oil-water contact at 2045 m. Low saturations of residual\r\nhydrocarbons are observed in intervals below the oil-water contact down to\r\nbottom Sognefjord Formation at 2097.5 m. No gas-oil contact could be determined\r\nfrom pressure measurements or logs because of the low permeability over this\r\ninterval. However, a gas-oil contact at 2034.5 m was inferred from hydrocarbon\r\nshows on the cores. The Fensfjord Formation was encountered at 2167.5 m and a\r\ntotal of 3.2 m net pay was calculated between 2167.5 m and 2171 m. MDT pressure\r\nmeasurements gave an oil-water contact at 2171 m. Low saturations of residual\r\nhydrocarbons are observed in intervals below the oil-water contact down to\r\nbottom Fensfjord Formation at 2",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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