{
  "type" : "Feature",
  "links" : [
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      "rel" : "collection",
      "type" : "application/geo+json",
      "title" : "The collection document"
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    {
      "href" : "https://factmaps.sodir.no/api/rest/services/Factmaps/FactMapsWGS84/OGCFeatureServer/collections/254/items/365?f=json",
      "rel" : "self",
      "type" : "application/geo+json",
      "title" : "This document as JSON"
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  "LayerId" : 254,
  "LayerName" : "Wellbore - History",
  "id" : "365",
  "properties" : {
    "OBJECTID" : 365,
    "wlbNpdidWellbore" : 370,
    "wlbName" : "25/11-10",
    "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\u003eWell 25/11-10 was drilled to appraise the\r\nBalder Field on the Utsira High in the North Sea. The objective was to\r\nestablish the presence of a thick accumulation of oil sand in the southern part\r\nof the Balder Field, and evaluate the geologic concept of sand-shale\r\ndistribution and the reservoir quality of the Paleocene 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\u003eAppraisal well 25/11-10 was spudded with\r\nthe semi-submersible installation Glomar Biscay II on 20 January 1981 on and\r\ndrilled to TD at 1988 m (1985 m logger's depth) in the Danian age chalk of the Ekofisk\r\nFormation. The well was drilled with seawater/gel/Lignosulphonate mud.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eThe Paleocene Heimdal Formation reservoir\r\nsands anticipated to be present in this well were found at 1786 m, significantly\r\ndeeper than prognosed and below the field oil-water contact. Gross thickness of\r\nthe sands was 128.2 m with an average porosity of 31.4%. They were water wet. The\r\nsands were found similar to those found in 25/11-7 to the north. Only thin\r\nstringers (2.5 m totally) with shows between 1757 m and 1785 m were found in\r\nthe Sele and Lista formations. \u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eNo cores were cut and no wire line fluid\r\nsamples were taken.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eThe well was permanently abandoned on 17\r\nFebruary 1981 as a dry well with shows.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cb\u003e\u003cspan lang=EN-GB\u003eTesting\u003c/span\u003e\u003c/b\u003e\u003cspan lang=EN-GB\u003e \u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eNo drill stem test was performed.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\r\n\r\n",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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}