{
  "type" : "Feature",
  "links" : [
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      "rel" : "collection",
      "type" : "application/geo+json",
      "title" : "The collection document"
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      "rel" : "self",
      "type" : "application/geo+json",
      "title" : "This document as JSON"
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      "title" : "This document as text/html"
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  "LayerId" : 254,
  "LayerName" : "Wellbore - History",
  "id" : "368",
  "properties" : {
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    "wlbNpdidWellbore" : 373,
    "wlbName" : "25/11-13",
    "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 25/11-13 was drilled to appraise the\r\nBalder Field on the Utsira High in the North Sea. The objective was to\r\nestablish the presence of a thick accumulation of oil sand in the southern part\r\nof the Balder Field, and evaluate the sand-shale distribution and the reservoir\r\nquality of the Paleocene sands. Top of the Paleocene reservoir sands was\r\nanticipated at 1702 m MSL.\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\u003eAppraisal well 25/11-13 was spudded with\r\nthe semi-submersible installation Glomar Biscay II on 10 May 1981 and drilled\r\nto TD at 1932 m in the Late Cretaceous Tor Formation. The well was drilled with\r\nseawater and bentonite down to 500 m and with\r\nseawater/bentonite/lignosulphonate mud from 500 m to TD.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eShows of hydrocarbons were present in\r\nthree 1-2 m thick Intra-Balder Formation sand beds between 1723 and 1743 m. The\r\nmain oil-bearing Paleocene reservoir sand (Hermod Formation) was encountered between\r\n1768.8 m to 1816.8 m. It contained oil down to the OWC at 1783 m (1758 m MSL),\r\nwhich is close to the regional Balder Field OWC. The average porosity in the\r\noil zone was 33.5 %. Poorly developed 4 m thick Heimdal Formation sand was\r\npenetrated at 1858 m, and then a massive Ty Formation sandstone was penetrated\r\nfrom 1875 m down to the Shetland Group at 1908 m.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eNo cores were cut and no wire line fluid\r\nsamples were taken.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eThe well was permanently abandoned on 29\r\nMay 1981 as an oil appraisal.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cb\u003e\u003cspan lang=EN-GB\u003eTesting\u003c/span\u003e\u003c/b\u003e\u003cspan lang=EN-GB\u003e \u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eNo drill stem test was performed.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\r\n",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
}