{
  "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/796?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/796?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/796?f=application/geo+json",
      "rel" : "alternate",
      "type" : "application/geo+json",
      "title" : "This document as application/geo+json"
    }
  ],
  "LayerId" : 254,
  "LayerName" : "Wellbore - History",
  "id" : "796",
  "properties" : {
    "OBJECTID" : 796,
    "wlbNpdidWellbore" : 1885,
    "wlbName" : "31/2-17 S",
    "wlbHistory" : "\r\n\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWell bores 31/2-17 S, -A, and -B were\r\ndrilled on the north-western periphery of the Troll West gas and oil discovery.\r\nThe objective was to obtain the thickness of the oil zone and reservoir\r\nproperties in the "Intermediate Area". Well bores 31/2-17 S and\r\n31/2-17 A are located on each side of a fault subdividing the Intermediate Area\r\ninto two main compartments. Well 31/2-17 S is located on the eastern side of\r\nthe fault. The side track 31/2-17 A was turned 180 degrees and landed on the\r\nwestern side of the fault. Well 31/2-17 B was side-tracked from well 31/2-17 A\r\nand drilled horizontally to a position about 5 m above the oil water contact.\u003c/p\u003e\r\n\r\n\u003cp\u003e\u003cb\u003eOperations and results\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eAll three well bores were drilled with\r\nthe semi-submersible installation Transocean 8 from the same wellhead location.\r\nOperations commenced with spud of 31/2-17 S on 28 December 1991 and ended with\r\ntemporary abandonment of 31/2-17 B on 14 February 1992. \u003c/p\u003e\r\n\r\n\u003cp\u003eWell 31/2-17 S was drilled to TD at 2220\r\nm in the Middle Jurassic Fensfjord Formation. No significant technical problem\r\noccurred in the well bore. The well bore was drilled with sea water and hi-vis\r\npills down to 921 m and with KCl/brine/PHPA mud from 921 m to TD. One and a\r\nhalf m of Draupne Formation was penetrated at 1870 m. The Sognefjord Formation\r\nreservoir was encountered with gas at 1871.5 m. The Gas-Oil-Contact was\r\npenetrated at 1972 m (1544.2 m TVD MSL) and the Oil-Water-Contact was\r\npenetrated at 2011 m (1565.8 m TVD MSL), both contacts in the Heather\r\nFormation. Six cores were taken. Core one and two and the upper part of core\r\nthree were cut in the Sognefjord Formation. The rest of the cores were cut in\r\nthe Heather B Formation. No fluid sample was taken.\u003c/p\u003e\r\n\r\n\u003cp\u003eWell 31/2-17 A was kicked of from 31/2-17\r\nS at 909 m and drilled to TD at 1924 m in the Middle Jurassic Fensfjord\r\nFormation. No significant technical problem occurred. The well bore was drilled\r\nwith KCl/brine/PHPA mud from kick-off to 1012 m",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
}