{
  "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/19?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/19?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/19?f=application/geo+json",
      "rel" : "alternate",
      "type" : "application/geo+json",
      "title" : "This document as application/geo+json"
    }
  ],
  "LayerId" : 254,
  "LayerName" : "Wellbore - History",
  "id" : "19",
  "properties" : {
    "OBJECTID" : 19,
    "wlbNpdidWellbore" : 20,
    "wlbName" : "31/3-1",
    "wlbHistory" : "\r\n\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eThe wildcat 31/3-1 was drilled ca 17 km\r\nNNE of well 13/6-1 in the Troll East area. The two wells were drilled at the\r\nsame time and together they established the existence of a Troll East gas\r\nfield. The objective of 31/3-1 was to test possible gas and oil accumulations\r\nin sandstones of Late to Middle Jurassic age. Secondary objective was to test\r\npossible hydrocarbon accumulations in Middle to Early Jurassic and Late\r\nTriassic. \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 31/3-1 was spudded with the\r\nsemi-submersible installation Deepsea Bergen on 17 July 1983 and drilled to TD\r\nat 2374 m in the Triassic Hegre Group. No significant problems occurred during\r\ndrilling except some technical problems when running the BOP for the 26"\r\nsection. The well was drilled with spud mud down to 865 m, with KCl/polymer\r\nfrom 865 m to 1300 m, with gel/lignosulphonate from 1300 m to 1833 m, and with\r\nlignite/lignosulphonate from 1833 m to TD. \u003c/p\u003e\r\n\r\n\u003cp\u003eTop reservoir (Sognefjord Formation) was\r\nencountered at 1351.5 m. The Sognefjord, Heather, and Fensfjord Formations were\r\nfound to hold a gas column of ca 220 m gas down to an approximate 4 m oil\r\ncolumn. The OWC was at ca 1576m.Geochemical analyses of the reservoir gas\r\nshow clear signs of biodegradation. Neither the Early Jurassic nor the Late\r\nTriassic contained hydrocarbons. \u003c/p\u003e\r\n\r\n\u003cp\u003eTwelve cores were cut continuously from\r\n1351 m to 1610 m in the Late and Middle Jurassic reservoir sequences. FMT fluid\r\nsamples were taken at 1374.2 m, 1570 m, 1574.2 m, and 1579.2 m.\u003c/p\u003e\r\n\r\n\u003cp\u003eThe well was permanently abandoned on 13\r\nOctober 1983 as a gas appraisal well.\u003c/p\u003e\r\n\r\n\u003cp\u003e\u003cb\u003eTesting\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eTwo DST's were performed, and gas was\r\nproduced from both. DST 1 was performed from the interval 1519 m to 1529 m and\r\nproduced 842400 Sm3 gas /day on a 22 mm choke. The gas had a gravity of 0.635\r\n(air = 1). DST2 was performed from the interval 1373 m to 1383 m and produced\r\n733500 Sm3 gas /day on a 19 mm choke. The gas had a gravit",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
}