{
  "type" : "Feature",
  "links" : [
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      "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/30?f=json",
      "rel" : "self",
      "type" : "application/geo+json",
      "title" : "This document as JSON"
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      "rel" : "alternate",
      "type" : "text/html",
      "title" : "This document as text/html"
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    {
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  ],
  "LayerId" : 254,
  "LayerName" : "Wellbore - History",
  "id" : "30",
  "properties" : {
    "OBJECTID" : 30,
    "wlbNpdidWellbore" : 31,
    "wlbName" : "29/9-1",
    "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 29/9-1 is located on the Hild\r\nstructure ca 1.5 km west of the UK border on the eastern margin of the East\r\nShetland Basin in the North Sea. The well was drilled to appraise the 30/7-2\r\ndiscovery. The main objectives were to test the hydrocarbon prospectivity and\r\nreservoir parameters of the Middle and Early Jurassic sequence. The well was\r\nplanned to be drilled 50 m into the Statfjord Formation at a total depth of\r\n4640 +/- 200 m.\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 29/9-1 was spudded with\r\nthe semi-submersible installation Treasure Seeker on 23 September 1983 and\r\ndrilled to TD at 4703 m in the Early Jurassic Statfjord Formation. During\r\ndrilling of the 17 1/2" hole, tight hole problems were experienced. The 9\r\n5/8" casing had to be run twice due to problems with the casing hanger\r\nseal. Due to high temperature and lack of circulation the mud in the 7"\r\nliner gelled up and had to be replaced several times. This caused difficulties\r\noperating the testing tool. The well was drilled with seawater and gel slugs\r\ndown to 1057 m and with KCl/polymer mud from 1057 m to TD. Mud retort test\r\nshowed 4-5% oil in the mud from top of the 12 1/4" section at 2752 m,\r\ndeclining to traces at 3732 m.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eThe well encountered oil in the Frigg\r\nFormation in the interval 1782 to 1787 m (OWC), and gas in the middle Jurassic\r\nBrent Group from 4386.5 m to 4421 m (gas down to top Dunlin Group; no\r\nhydrocarbon contact was encountered).\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eThe Frigg Formation (1782-1981 m) consisted\r\nof predominantly of fine to coarse grained porous sandstones. The uppermost 2.5\r\nm was tight and calcareous cemented. Net pay was thus 2.5 m with 31% average\r\nporosity and 40% average water saturation, based on logs. No ",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
}