{
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  "LayerId" : 254,
  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 1906,
    "wlbName" : "2/7-28",
    "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\u003eExploration well 2/7-28 was drilled on\r\nthe Eldfisk Jurassic Prospect, on the flank of the Eldfisk Field on the western\r\nside of the Feda Graben in the North Sea. The well was positioned 1.8\r\nkilometres west of the Eldfisk Alpha Platform. The primary objective was to\r\nprove hydrocarbons in sandstones in the Late Jurassic Eldfisk Formation. The\r\nEldfisk Formation is interpreted as high density turbidite/debris flow deposits\r\nlocated on the eastern side of the major northwest-southeast trending Skrubbe\r\nFault. \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 2/7-28 was spudded with the jack-up\r\ninstallation Mærsk Guardian on March 8, 1992 and drilled to TD at 3893 m, 54 m\r\ninto the Late Permian Zechstein Group. Drilling to the Upper Palaeocene Section\r\nproceeded without major difficulty, but the 11 3/4" liner was set higher\r\nthan prognosed because of a combination of lost circulation in the Lower\r\nPalaeocene Våle Formation and instability in the Tertiary section above. A\r\nprognosed depleted chalk reservoir horizon, the flank of the Eldfisk Field, necessitated\r\nsetting 9 7/8" casing at top of the Ekofisk Formation. Drilling proceeded\r\nto 3050.4 m in the Lower part of the Hod Formation, the proposed setting for\r\nthe 8 3/4" casing. While under-reaming before running the linear, an\r\nunder-reamer arm was lost in the hole. A successfully sidetrack hole was made\r\nbelow the liner. Drilling continued to 3061.1 m where the bottom hole assembly\r\ntwisted off. The hole was sidetracked again and drilling continued to base of\r\nthe Early Cretaceous where 7" liner was set. Further drilling to final TD\r\nwent without significant difficulties. The well was drilled water based with spud\r\nmud down to 745 m, polymer mud from 745 m to 8313 m, sea water/Drispac/Soltex\r\nmud from 8313 m to 9304 m, polymer mud from 9304 m to 1",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
}