{
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  "LayerId" : 254,
  "LayerName" : "Wellbore - History",
  "id" : "803",
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    "OBJECTID" : 803,
    "wlbNpdidWellbore" : 1920,
    "wlbName" : "25/11-16",
    "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 25/11-16 was drilled south of the\r\nBalder Field complex on the Utsira High in the North Sea. The main objective was\r\nto test the hydrocarbon potential of the Heimdal Formation within the\r\n"Hanna" mound. Possible younger sand developments in the Lista and\r\nSele Formations were secondary targets.\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 25/11-16 was spudded with\r\nthe semi-submersible installation Vildcat Explorer on 29 June 1992 and drilled\r\nto TD at 1945 m in the Late Cretaceous Hod Formation. The well was drilled with\r\nspud mud down to 1339 m and with CaCO3/Nacl mud from 1339 m to TD.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eThe primary target Heimdal Formation was\r\nencountered from 1767 m to 1872 m. Gross thickness is 105.75 m with 83.9 m net\r\nsand. The formation was oil bearing with 18.87 m net pay of heavy oil (0.85\r\ng/cc at reservoir conditions) down to a series of claystone beds at 1786 m. The\r\naverage porosity in the oil zone was 37.5% and the average Sw was 12.8%. The\r\nreservoir sand is very poorly consolidated, homogenous and has a net to gross\r\nratio in the oil zone of 0.96. The average range of both horizontal and\r\nvertical permeabilities is 10 to 14 Darcies. A free water contact was\r\nestablished at 1793 m from MDT data. The oil/water contact appears to occur at\r\nthe base of the sand unit at ca 1790 m (1765 m TVD MSL). In addition to oil\r\nshows in the Heimdal Formation oil zone oil two isolated shows were recorded in\r\nthin sand stringers at 1713 m in the Balder Formation and at 1735 m in the Sele\r\nFormation.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eA total of 200 m core was recovered from\r\n14 cores taken in the interval 1699 m to 1914 m (93% recovery), starting 1 m\r\nbelow the top of the Balder Formation and ending 17 m into the Tor Formation. A\r\ntotal of 2",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
}