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  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 853,
    "wlbName" : "6507/7-4",
    "wlbHistory" : "\r\n\r\n\r\n\u003ch2\u003e\u003cspan lang=EN-GB\u003eWellbore history \u003c/span\u003e\u003c/h2\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003e \u003c/span\u003e\u003c/p\u003e\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\u003eAppraisal well 6507/7-4 was drilled in\r\nthe northern part of the Haltenbanken area, some 190 km west of the Norwegian\r\ncoast. It was drilled to evaluate the "B" prospect in the intensely\r\nfaulted zone that lies at the intersection of the Nordland Ridge in the\r\nnortheast and the Halten Terrace in the south. The prospect was in a southward\r\nplunging horst block formed by a Late Jurassic tensional fault system. Well\r\n6507/7-4 was drilled in a down dip position relative to discovery well 6507/7-2\r\nand the prime objective was to establish the oil/water contact in sandstones of\r\nthe Middle Jurassic Tomma Formation.\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\u003eWell 6507/7-4 was spudded with the\r\nsemi-submersible installation Nortrym on 6 November 1985 and drilled to TD at\r\n2850 m in the Early Jurassic Tilje Formation. Due to adverse weather conditions\r\nin the first week of operations spudding of the well was made difficult, and 4.5\r\ndays were lost as WOW in this phase. Swelling clays (gumbo) caused some problems\r\nin the 17 1/2" section. The upper part of the core barrel in core no 3\r\nruptured, unfortunately exactly in the section around OWC. Otherwise operations\r\nproceeded without significant problems. The well was drilled with sea water and\r\ngel sweeps down to 1021 m and with gypsum/polymer mud from 1021 m to TD.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eThe Tomma Formation sandstones (Garn\r\nFormation) was prognosed at 2455 m, and encountered at 2449 m. The Garn\r\nFormation was found oil bearing. Oil shows were observed on core no 1 from\r\n2444.5 m (driller's depth) down to 2490.7 m. It was described as a uniform\r\nstrong yellow show with even white cut down to 2463 m when the show became m",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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}