{
  "type" : "Feature",
  "links" : [
    {
      "href" : "https://factmaps.sodir.no/api/rest/services/Factmaps/FactMapsWGS84/OGCFeatureServer/collections/254/items?f=application%2fjson",
      "rel" : "collection",
      "type" : "application/geo+json",
      "title" : "The collection document"
    },
    {
      "href" : "https://factmaps.sodir.no/api/rest/services/Factmaps/FactMapsWGS84/OGCFeatureServer/collections/254/items/483?f=json",
      "rel" : "self",
      "type" : "application/geo+json",
      "title" : "This document as JSON"
    },
    {
      "href" : "https://factmaps.sodir.no/api/rest/services/Factmaps/FactMapsWGS84/OGCFeatureServer/collections/254/items/483?f=text/html",
      "rel" : "alternate",
      "type" : "text/html",
      "title" : "This document as text/html"
    },
    {
      "href" : "https://factmaps.sodir.no/api/rest/services/Factmaps/FactMapsWGS84/OGCFeatureServer/collections/254/items/483?f=application/geo+json",
      "rel" : "alternate",
      "type" : "application/geo+json",
      "title" : "This document as application/geo+json"
    }
  ],
  "LayerId" : 254,
  "LayerName" : "Wellbore - History",
  "id" : "483",
  "properties" : {
    "OBJECTID" : 483,
    "wlbNpdidWellbore" : 492,
    "wlbName" : "6407/9-5",
    "wlbHistory" : "\r\n\r\n\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWell 6407/9-5 was the fifth well drilled on\r\nthe Draugen Field in the southern Haltenbanken area. Wells 6407/9-1, 6407/9-2\r\nand 6407/9-3 delineated an areally extensive oil accumulation in relatively\r\nthin Late Jurassic Rogn Formation sandstone. Net oil sand thicknesses in these\r\nwells were 39, 12 and 34 m respectively. The oil gravity was 40 deg API. Well\r\n6407/9-4, located on the west flank of the northern accumulation, confirmed\r\npinch out of the Rogn Formation and encountered similar oil in the underlying Garn\r\nformation. The initial conditions of pressure and oil water contact in this\r\nwell (1638.5 m MSL were similar to those in the Rogn Formation accumulation. The\r\nobjectives of well 6407/9-5 were to delineate top structure and rock qualities\r\nin the southern culmination. Prognosed TD was 1805 m in rocks of Triassic age,\r\nor a maximum depth of 4000 m.\u003c/p\u003e\r\n\r\n\u003cp\u003e\u003cb\u003eOperations and results\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eAppraisal well 6407/9-5 was spudded with\r\nthe semi-submersible installation West Venture on 12 September 1985 and drilled\r\nto TD at 1820 m in the Early Jurassic Not Formation. Drilling proceeded without\r\nserious problems, except for the sections trough glacial deposits were huge\r\nboulders caused minor problems. The well was drilled vertical. Deepest reported\r\ndeviation survey was at 1675 m (1675 m TVD RKB). To this depth maximum\r\ndeviation from vertical was 0.66 deg. The well was drilled with seawater and\r\nbentonite down to 811 m, with KCl/polymer mud from 811 m to 1625 m, and with\r\nchalk mud from 1625 m to TD.\u003c/p\u003e\r\n\r\n\u003cp\u003eThe Rogn Formation was encountered at\r\n1654 m, 15 m deeper than prognosed. Light oil was discovered, as known from the\r\nother wells in the Draugen field. The oi1/water contact was found at 1671 m\r\n(1639 m MSL), the same contact as in the other wells drilled on the Draugen Field.\r\nAverage reservoir quality over this 17 m interval was good, with a calculated\r\nhydrocarbon saturation of 76% and a porosity of 27%. Core permeabilities from\r\nthe oil interval typically r",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
}