{
  "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/315?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/315?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/315?f=application/geo+json",
      "rel" : "alternate",
      "type" : "application/geo+json",
      "title" : "This document as application/geo+json"
    }
  ],
  "LayerId" : 254,
  "LayerName" : "Wellbore - History",
  "id" : "315",
  "properties" : {
    "OBJECTID" : 315,
    "wlbNpdidWellbore" : 320,
    "wlbName" : "15/6-5",
    "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 15/6-5 was drilled in the north-eastern\r\npart of the Sleipner Field (Sleipner West). The objective was to confirm\r\nstructural and stratigraphic interpretations as well as define the hydrocarbon\r\ncontent and contacts and the reservoir properties in this part of the Field.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eThe well is reference well for the Hugin\r\nFormation.\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 15/6-5 was spudded with\r\nthe semi-submersible installation Drillmaster on 10 October 1977 and drilled to\r\nTD at 3824 m in Triassic sediments. No significant problems were encountered\r\nduring the drilling of the well. Initial drilling from the sea floor to 166.5 m\r\nwas with fresh water and lignosulphonate. Below this depth and down to 1197.5 m\r\na seawater gel with carboxymethyl-cellulose (CMC) mud system was used. Below\r\n1197.5 m the above mud with lignosulphonate was used.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eThe Hugin Formation (Upper Dogger\r\nSandstone) was encountered at 3627 meters. This was six meters below the lowest\r\ngas seen in the main Sleipner reservoir to that date, 3597 m MSL in 15/9-1. The\r\nHugin Formation is 53 meters thick in the well and essentially 100% sandstone. Electric\r\nlog analysis and RFT pressure data show the section to be water bearing,\r\nalthough the presence of residual hydrocarbons down to 3655 m was indicated by\r\nbleeding gas and excellent liquid hydrocarbon shows in the cores. No\r\nhydrocarbon indications were present below 3655 m. The Sleipner Formation\r\n(Lower Dogger) came in at 3580 m with several massive coals beds. The well established\r\nthat the potential lower limit of hydrocarbons in the main Sleipner reservoir was\r\n3627 m (3603 m MSL). \u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eFour conventional cores were cut from\r\n3629 m to",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
}