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  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 911,
    "wlbName" : "6507/2-1",
    "wlbHistory" : "\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWell 6507/2-1 is located on the Dønna\r\nTerrace, offshore Mid Norway. The primary objective of the well was to test the\r\nhydrocarbon potential of Middle and Early Jurassic sandstone sequences. Secondary\r\nobjective was to examine the possibilities of Cretaceous sand in the area. \u003c/p\u003e\r\n\r\n\u003cp\u003eIt was expected that the primary target, the\r\nMiddle Jurassic Tomma sandstone (Fangst Group in today?s nomenclature) would be\r\nencountered at ca 3848 m whilst the Early Jurassic Aldra sandstone (Tilje\r\nFormation) was prognosed at ca 4158 m. Expected total depth for the well was\r\n4823 m +/- 200 m or about 50 m into Triassic aged sediments.\u003c/p\u003e\r\n\r\n\u003cp\u003e\u003cb\u003eOperations and results\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWell 6507/2-1 was spudded with the\r\nsemi-submersible installation Polar Pioneer on 24 June 1986 and drilled to TD at 4477 m in Late Triassic claystones and siltstones of the Åre Formation. The\r\nwell had 29% down time, due mostly to problems with the seal assemblies and\r\ntechnical sidetracking. The sidetrack was kicked off from 3285 m after the pipe\r\nhad stuck twice, at 3432 m and 3430 m. The well was drilled with seawater and\r\nhigh viscosity pills down to1064 m, with KCl/polymer mud from 1064 m to 3655 m\r\n(including sidetrack), and with gel/lignite/resinex mud from 3655 m to TD.\u003c/p\u003e\r\n\r\n\u003cp\u003eThe well penetrated several sandy intervals\r\nin the Cretaceous, the most important beeing a thin Lysing Formation sand from\r\n2874 to 2879 m, and an Intra-Lange Formation sandy sequence from 3425 m to 3490\r\nm. The Jurassic sandstones of the Fangst Group were encountered at 3858 m. Oil shows;\r\nstaining and fluorescence were observed sporadically throughout the well from\r\n2800 m to 4375 m. The strongest oil shows were observed in the Lysing and Lange\r\nFormation sandstones, and from 3858 m down to 3956 m in the Fangst and Båt\r\nGroups. Well site geochemical analyses indicated two source rock intervals in\r\nthe well. The sequence from 3610 to 3858 m (the Viking Group) was considered to\r\nbe a fair source rock containing mature Type II margina",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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