{
  "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/325?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/325?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/325?f=application/geo+json",
      "rel" : "alternate",
      "type" : "application/geo+json",
      "title" : "This document as application/geo+json"
    }
  ],
  "LayerId" : 254,
  "LayerName" : "Wellbore - History",
  "id" : "325",
  "properties" : {
    "OBJECTID" : 325,
    "wlbNpdidWellbore" : 330,
    "wlbName" : "15/9-12",
    "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 15/9-12 was drilled as an appraisal\r\nwell on the saddle area between the Alpha and Beta structures on the Sleipner\r\nVest field in the North Sea. The main objective was to test the Middle Jurassic\r\nsandstones.\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\u003eAfter setting anchors on 8 November 1981\r\nthe spud was delayed two weeks due to strike by the maritime and drilling crews.\r\n\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eAppraisal well 15/9-12 was spudded with\r\nthe semi-submersible installation Nordraug on 22 November 1981 and drilled to\r\nTD at 3740 m in the Middle Jurassic Sleipner Formation. The 36" hole was\r\ndrilled to 195 m but due to bad weather the hole was lost and the well was re-spudded\r\non 26 November. Drilling of the 26" and 17 1/2" holes went forth\r\nwithout significant problems other than tight spots in the lower part of the 17\r\n1/2" hole. When setting the 9 the 5/8" casing shoe at 2755 m 64 m3 mud\r\nwas lost to the formation. The well was drilled with seawater and gel slugs\r\ndown to 501 m, with gel-lignosulphonate mud from 501 m to 1135 m, with lignosulphonate/gypsum/CMC\r\nmud from 1135 m to 2771 m, and with gel-lignosulphonate mud from 2771 to 3740\r\nm.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eA 251 m thick Heimdal Formation was\r\npenetrated from 2374 m to 2625 m. The Heimdal Formation was water bearing\r\nwithout shows. The primary target reservoir Hugin Formation was penetrated at\r\n3510 m and proved to contain gas-condensate with a gas-water contact at 3654\r\naccording to RFT pressure gradients. Weak shows continued on the cores down to\r\n3665 m. The underlying Sleipner Formation was dry without shows. \u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eA total of 168.8 m core was cut from top\r\nto base of the Hugin Formation. The depth for cores 1 - 9 should be sh",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
}