{
  "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/155?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/155?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/155?f=application/geo+json",
      "rel" : "alternate",
      "type" : "application/geo+json",
      "title" : "This document as application/geo+json"
    }
  ],
  "LayerId" : 254,
  "LayerName" : "Wellbore - History",
  "id" : "155",
  "properties" : {
    "OBJECTID" : 155,
    "wlbNpdidWellbore" : 158,
    "wlbName" : "7/8-1",
    "wlbHistory" : "\u003cp\u003eWell 7/8-1 was drilled on an anticlinal\r\nstructure in the westernmost part of the Norwegian-Danish Basin and marginal to\r\nthe northern slope of the Central Through. The anticline was interpreted as a\r\nsalt-induced structure with closure at top Paleocene and top Cretaceous, and\r\nthese horizons were defined as the main objectives of the well. The well should\r\nbe drilled into Permian salt with prognosed top at 3261 m (10700 ft).\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 7/8-1 was spudded with the\r\nsemi-submersible installation Ocean Viking on 31 August 1968 and drilled to TD at 3334 m in Triassic sediments of the Gassum Formation. The well did not\r\nreach the planned TD in Permian salt.\u003c/p\u003e\r\n\r\n\u003cp\u003eDrilling went without significant\r\nproblems down to 1981 m. From this depth on, several drilling problems arose.\r\nAfter the casing had parted at two places the well had to be sidetracked from\r\n1831 m. This hole was then drilled to 3334 m, which is recorded as TD for the\r\nwell. At this depth the well kicked and the mud density was increased from 12.3\r\nppg to 12.8 ppg. While circulating, the hole gave up mud and sloughing finally\r\ncaused the pipe to stick. After having backed off the drill pipe and displaced\r\nthe hole with 14.0 ppg mud, a high pressure was observed on the drill pipe and\r\nthe mud system density was increased to 14.3 ppg. Several mud conditioning\r\noperations were necessary until the well seemed dead. After recovering 2650 m\r\nof drill pipe out of the hole the well was plugged from 2657 m to 2469 m and\r\ndisplaced with 14.7 ppg mud. A second sidetracked hole was then drilled from\r\n2538 m to 3316 m where the final logs were run. The operations were also\r\ndelayed significantly by severe weather conditions in December and January. The\r\nwell was drilled with seawater and high viscosity pills down to 1166 m, and with\r\na saturated salt water mud from 1166 m to TD. Below 1920 m the mud contained\r\nfrom 2 - 6 % oil.\u003c/p\u003e\r\n\r\n\u003cp\u003eBoth objective formations were encountered.\r\nHowever, both were thinner tha",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
}