{
  "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/238?f=json",
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      "title" : "This document as JSON"
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  "LayerId" : 254,
  "LayerName" : "Wellbore - History",
  "id" : "238",
  "properties" : {
    "OBJECTID" : 238,
    "wlbNpdidWellbore" : 243,
    "wlbName" : "1/9-1",
    "wlbHistory" : "\r\n\r\n\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003e \u003c/span\u003e\u003c/p\u003e\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 1/9-1 was drilled on a salt diapir\r\nstructure located in the Feda Graben in the southern North Sea. The primary objective\r\nwas to test hydrocarbon accumulations in the Danian and Late Cretaceous chalk. A\r\nsecondary objective was to test the Jurassic and Triassic sandstones.\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\u003eWildcat well 1/9-1 was spudded with the\r\nsemi-submersible installation Ross Rig on 14 October 1976 and drilled to TD at\r\n3706 m in Cenomanian age limestone (Hidra Formation). The Jurassic was not\r\nreached. The anchor chain broke on three occasions. The third breakdown occurred\r\nduring the last DST. The decision was then made to suspend the well for later\r\nre-entry. The well was drilled with seawater and gel slugs down to 433 m, and\r\nwith seawater-lime-lignosulphonate from 433 m to TD.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eThe Danian chalk (Ekofisk Formation) was\r\nreached at 3043.5 m just below a marl section. It consisted of two hydrocarbon\r\nbearing zones. Zone 1 from 3043.5 m to 3071.5 m and a tighter zone 2 from 3071.5\r\nm to 3103.5 m. Maastrichtian (Tor Formation) starts at about 3103.5 m and is\r\nalso hydrocarbon bearing with water saturations below 50% down to 3141.5 m. A\r\ntransition zone with gradually increasing water content is seen from 3134.0 m\r\ndown to 3182.5 m. Apart from in the oil bearing reservoirs weak oil shows on minor\r\nsandstones were recorded in the interval 2947 to 2958 m; weak to good oil shows\r\nwere seen on limestone in the interval 3300 m to 3500 m; and finally weak oil\r\nshows were seen occasionally from 3645 m to 3675 m.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eThe chalk section was cored in 11 cores from\r\n3048 m to 3235.5 m (Ekofisk and Tor formations) and one core (core no 12) from\r\n3327.2",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
}