{
  "type" : "Feature",
  "links" : [
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      "rel" : "collection",
      "type" : "application/geo+json",
      "title" : "The collection document"
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  "LayerId" : 254,
  "LayerName" : "Wellbore - History",
  "id" : "257",
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    "OBJECTID" : 257,
    "wlbNpdidWellbore" : 262,
    "wlbName" : "2/7-3",
    "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 2/7-3, was drilled on the southern\r\ncompartment of the Eldfisk structure in the North Sea. The Eldfisk structure is\r\na NNW-SSE trending partly salt-related anticlinal structure located between the\r\nValhall and Embla fields to the south and the Ekofisk Field to the north. The\r\nprimary objectives were to test the Danian Limestone, and the possibility of\r\nJurassic sandstone development on the crest of the Eldfisk structure. Both\r\nobjectives were expected to be ca 120 m thick. The Late Cretaceous carbonate,\r\nlower Cretaceous sandstones and Triassic sandstones were secondary objectives.\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\u003eWildcat well 2/7-3 was spudded with the jack-up\r\ninstallation Orion on the 14 April 1972 and drilled to TD at 4359 m in the Permian\r\nZechstein Group. Note that the Daily Report records Decca final fix as 56° 23' 01.7\"N,\r\n03° 14' 44.6\"E, 60 meters off desired location, while other parts of the Completion Report\r\nseems to record the coordinates of the slightly different planned well location.\r\nThe well was drilled with seawater and hi-vis sweeps down to 482\r\nm, with gypsum-CMC lignosulphonate mud from 482 m to 3195 m, and with salt\r\nsaturated gypsum-CMC lignosulphonate mud from 3195 m to TD. Between 482 m and\r\nTD diesel was added to the mud.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eThe Danian section was 90 m thick, highly\r\nfractured, and yielded commercial quantities of oil. Logs and two drill stem\r\ntests (DST 1 and DST 2) in the Late Cretaceous rocks indicated low porosity and\r\npermeability. One hundred and fifty gross meter of Jurassic sandstones was\r\npenetrated in the well. Log analysis indicated the sands are very shaly and\r\nsilty. Three of the sidewall cores from this interval were described as hard,\r\nblack shale and the fourth as a very calcareous sandstone. Although the logs\r",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
}