{
  "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/274?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/274?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/274?f=application/geo+json",
      "rel" : "alternate",
      "type" : "application/geo+json",
      "title" : "This document as application/geo+json"
    }
  ],
  "LayerId" : 254,
  "LayerName" : "Wellbore - History",
  "id" : "274",
  "properties" : {
    "OBJECTID" : 274,
    "wlbNpdidWellbore" : 279,
    "wlbName" : "2/8-9",
    "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 2/8-9 was drilled as an appraisal to\r\nhelp establish the commerciality of the southern North Sea Valhall Field, which\r\nhad earlier been discovered by 2/8-6 and confirmed by 2/8-8. The primary\r\nobjective of 2/8-9 was an evaluation of the Chalk reservoirs of Maastrichtian (Tor\r\nFormation) and pre-Maastrichtian (Hod Formation) age. The existence of\r\nhydrocarbons in the Early-Middle Miocene section creates a low velocity\r\n"bright spot" on the seismic, blanketing the crest of the Valhall\r\nstructure and causing "dimming" or total loss of the top chalk\r\nsection. The Valhall crest is therefore an area where the estimated thickness\r\nof the Tor section and the fault patterns are questionable. Only one previous\r\nwell, 2/8-4, had been drilled in the vicinity some 2.5 km to the west. Well\r\n2/8-4 was essentially a dry hole with only 1 m of Tor and tight but oil bearing\r\nHod Formation. \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 2/8-9 was spudded with the\r\nsemi-submersible installation Sedco 135 G on 9 April 1976 and drilled to TD at 2703\r\nm in the Early Cretaceous Rødby Formation. The well was drilled in a total of\r\n30 days, without any major drilling problems. It was drilled with sea water and\r\nviscous mud down to 183 m, with seawater and gel from 183 m to 392 m, and with\r\nDrispac/lime/seawater mud from 392 m to TD.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eWell 2/8-9 penetrated a normal of\r\nQuarternary -Tertiary section from surface to top of the Late Cretaceous. The\r\nDanian was found to have been removed by erosion. The well found the Chalk\r\nhydrocarbon bearing at 2524 m correlating 53.3 m high and 76.8 m low to wells\r\n2/8-4 and 2/8-8, respectively. The Tor Formation was 5.5 m thick with high\r\nreservoir quality; porosity of up to 48% and a water saturation close to zero. The\r\nHo",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
}