{
  "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/142?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/142?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/142?f=application/geo+json",
      "rel" : "alternate",
      "type" : "application/geo+json",
      "title" : "This document as application/geo+json"
    }
  ],
  "LayerId" : 254,
  "LayerName" : "Wellbore - History",
  "id" : "142",
  "properties" : {
    "OBJECTID" : 142,
    "wlbNpdidWellbore" : 145,
    "wlbName" : "9/8-1",
    "wlbHistory" : "\r\n\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eThe 9/8-1 well is located in the central\r\nwestern part of the Norwegian-Danish Basin in the North Sea. The objective was\r\nto test the hydrocarbon potential of the sedimentary section present on the\r\ncrest of a closed seismic structure interpreted to be a salt pillow.\r\nProspective reservoir sands were anticipated towards the base of the Tertiary,\r\nin the Early Cretaceous and in the Early Triassic. \u003c/p\u003e\r\n\r\n\u003cp\u003e\u003cb\u003eOperations and results\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWildcat well 9/8-1 was spudded with the\r\njack-up installation Endeavour on 23 May 1968 and drilled to TD at 2176 m in\r\nthe Late Permian Zechstein Group. It was the first well drilled in Norwegian\r\nwaters with a jack-up platform. After the 36" conductor was set at 137 m,\r\nthe hole was drilled with a 17 1/2" bit to 411 m. While reaming the hole\r\nto 26", cavings and fill of shell fragments and gravel caused problems\r\nfrom about 300 m, necessitating the 20" casing to be set high at 360 m.\r\nThe only additional drilling problem of note was a twist off while drilling at\r\n1546 m. The fish was recovered in a few hours without difficulty. From here,\r\noperations were successfully carried out to TD. Initial drilling from the sea\r\nfloor to 1350 feet was with seawater and gel without casing. Returns were to\r\nthe sea floor. Below 1350 to TD at 7138 feet, a Spersene, XP-20, Salinex mud\r\nwith up to 10 % diesel oil was used.\u003c/p\u003e\r\n\r\n\u003cp\u003eThe interpreted salt pillow structure was\r\nfound to be a piercement which breached the Triassic with the result that the\u003c/p\u003e\r\n\r\n\u003cp\u003eTriassic Bunter sand section was not\r\npresent in this well. Top Permian Zechstein evaporites at 2109 m were\r\nimmediately overlain by the Middle Jurassic Dogger formation. The Dogger\r\ncontained some porous sandstones (Sandnes Formation) but these had only weak\r\nshows in the uppermost few feet and the logs indicated high water saturation.\r\nBoth the Lower Cretaceous and the entire Tertiary section consisted mainly of\r\nclays. No sands were developed at the base of either the Lower Cre",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
}