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  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 475,
    "wlbName" : "6506/12-4",
    "wlbHistory" : "\r\n\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWildcat well 6506/12-4 was drilled on the\r\nAlpha north segment in the northern part of the Smørbukk field, Haltenbanken.\r\nThe primary objective was to test the hydrocarbon bearing potential of Middle\r\nJurassic Sandstones.\u003c/p\u003e\r\n\r\n\u003cp\u003eSecondary objectives were to test Early\r\nJurassic sandstones within the coal beds, and possible sand development within\r\nthe Cretaceous. The prognosed depth was 4457 m or rocks of Triassic age to\r\nsatisfy the licence commitment.\u003c/p\u003e\r\n\r\n\u003cp\u003e \u003c/p\u003e\r\n\r\n\u003cp\u003eThe well is the typewell for the Melke,\r\nSpringar, and Nise Formations, and reference well for the Viking and Cromer\r\nKnoll Groups and the Lange, Lysing, and Kvitnos Formations (NPD Bulletin no 4)\u003c/p\u003e\r\n\r\n\u003cp\u003e \u003c/p\u003e\r\n\r\n\u003cp\u003e\u003cb\u003eOperations and results\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWildcat well 6506/12-4 was spudded with\r\nDyvi Offshore installation Dyvi Stena 24 March 1985 and drilled to TD at 4457 m\r\nin the Early Jurassic Åre Formation. The well was drilled with seawater and\r\nhi-vis pills down to 680 m where a shallow gas pocket caused the well to flow.\r\nThe gas was led through the diverter system and mud weight was increased. This\r\nled to lost circulation, but control was gradually regained after pumping LCM\r\npills. A cement plug was set between 600 m and 680 m. The 20" casing was\r\nset shallow at 622 m and drilling commenced with a Gypsum / Lignosulphonate mud\r\nsystem to the 8 1/2" section at 3936 m from where a weighted\r\nlignosulphonate mud system was used the rest of he well bore down to TD. During\r\ncoring operation, at 3978 m, a water kick was experienced, but was brought\r\nunder control. During cleanup at TD the drill string got stuck. While\r\nattempting to work this free, the string fell of the hook. Three weeks were\r\nspent on fishing for the string without complete success. The top of the fish\r\nis left at 3910 m.\u003c/p\u003e\r\n\r\n\u003cp\u003eAbout ten m sandstone was encountered in\r\ntop Lysing Formation (Late Cenomanian ? Turonian). The sandstone was cored and\r\nit contained hydrocarbons but none were produced during DST. The G",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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