{
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      "rel" : "collection",
      "type" : "application/geo+json",
      "title" : "The collection document"
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    {
      "href" : "https://factmaps.sodir.no/api/rest/services/Factmaps/FactMapsWGS84/OGCFeatureServer/collections/254/items/46?f=json",
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      "title" : "This document as JSON"
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  "LayerId" : 254,
  "LayerName" : "Wellbore - History",
  "id" : "46",
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    "OBJECTID" : 46,
    "wlbNpdidWellbore" : 47,
    "wlbName" : "25/2-7",
    "wlbHistory" : "\r\n\r\n    General \r\n    \r\n    Block 25/2 is located on the eastern margin of the Viking Graben towards the Bjørgvin \r\n    Arch. The main targets for well 25/2-7 were the Middle Jurassic Vestland Group and the \r\n    Early Jurassic Statfjord Formation, which were hydrocarbon bearing in the surrounding \r\n    wells 25/2-4, 25/2-5 and 25/2-6. In addition possible Late Callovian sands, as in the 25/2 \r\n    -4 well, constituted a second target. \r\n    \r\n   \u003cp\u003e\u003cb\u003eOperations and result\u003c/b\u003e\u003c/p\u003e\r\n    \r\n    Wildcat well 25/2-7 was spudded with the semi-submersible installation Borgsten \r\n    Dolphin on 1 April 1982 and drilled to TD at 4110 m in the Early Jurassic Dunlin Group. \r\n    Operations took 103 days including 13 days of down time. Four and a half days were lost \r\n    due to WOW, 5.5 days due to rig compensator damage, and 3 days were lost due to a \r\n    leaking pack off assembly in the 9 5/8\" casing. \r\n    \r\n    No Callovian sands (Intra Heather Formation) were encountered. Of the two main \r\n    objectives the Vestland Group was confirmed and tested as a reservoir. The Vestland \r\n    Group sandstones were encountered at 3406 m, 174 m higher than prognosed. It was \r\n    389 m thick, which was thicker than expected, and it consisted of an upper and a lower \r\n    interval. Massive beds of sandstone, locally slightly shaly or well cemented with some \r\n    layers of black shales and coal were encountered in the upper interval from 3406 m to \r\n    3628 m. The gross thickness of this interval was 222 m and net thickness approximately \r\n    179 m. Porosity as estimated from cores 1 and 2 and logs ranged from 2.5 % to 21 % \r\n    with an average of 12 %. Permeability in this zone was rather low (0.01 to 15.55 mD). \r\n    The second zone was penetrated from 3628 m to 3795 m. This interval was composed \r\n    of shales and sandstones alternating in a regular sequences of 15 to 20 m. Net \r\n    thickness was approximately 77 m with a porosity ranging from 16 % to 21% based on \r\n    logs. Some oil shows were recorded on cores 1 and 2 i",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
}