{
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  "LayerId" : 254,
  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 397,
    "wlbName" : "30/11-2",
    "wlbHistory" : "\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 30/11-2 was drilled on the Bjørgvin\r\nArch between the Stord Basin and the Frigg Field in the North Sea. The primary objective\r\nwas a potential stratigraphic trap, formed by a shale-out of the Early Eocene\r\n"Frigg Sand" equivalent. Secondary objectives were sand bodies in the\r\nunder-lying Paleocene (Cod and Danian Sands).\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\u003eWildcat well 30/11-2 was spudded with the\r\nsemi-submersible installation Ocean Vanguard on 18 March 1975 and drilled to TD\r\nat 2590 m in the Late Cretaceous Shetland Gp. A shallow gas incident occurred\r\nat 343 m where the total mud gas increased to more than 30% for 5 minutes. The\r\nmud weight was increased to 490 psi. No further significant problem was\r\nencountered in the operations. The well was drilled with seawater and viscous slugs\r\ndown to 215 m, with H921 Polymer/lignosulphonate/Gel and Ferrobar weighting\r\nmaterial from 215 m to 1158 m, and with Dextrid/gel/lignosulphonate and Ferrobar\r\nweighting material from 1158 m to TD. \u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eAll targets including the Frigg sand were\r\nwater bearing. The Frigg Formation was encountered at 2052 m and was 86 m\r\nthick. Based on petrophysical analysis it contain 58 m net sand (N/G = 0.69)\r\nwith 33% average porosity. The Cod and Danian Sands were absent, or represented\r\nonly by thin sandstone streaks and tight siltstones. Apart from the shallow gas,\r\nall gas readings were low throughout the well. The only oil show described was\r\n"a very faint solvent cut fluorescence" on a sidewall core from\r\n2120.2 m in the Frigg sand.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eNo cores were cut and no fluid sample was\r\ntaken.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eThe well was permanently abandoned on 16\r\nApril 1975 as a dry well.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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