{
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  "LayerId" : 254,
  "LayerName" : "Wellbore - History",
  "id" : "770",
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    "wlbNpdidWellbore" : 1819,
    "wlbName" : "34/7-18",
    "wlbHistory" : "\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 34/7-18 is located on the Vigdis\r\nField on Tampen Spur in the Northern North Sea. It was designed to drill and\r\ntest a Jurassic Prospect (Segment IV of the C Plus structure), between the\r\nSnorre and Tordis Fields. The well was drilled in a high position on a gently\r\ndipping structure where the top of the Brent Group is eroded. The primary\r\nobjective was to test the presence, reservoir quality and fluid contacts in the\r\nprospect. A secondary objective was to test the pressure regimes in the\r\nJurassic sequence, including possible depletion associated with pressure communication,\r\npreviously identified in the nearby Tordis Field. A boulder bed was expected at\r\n303 m, and shallow gas could occur at 394 m and 546 m.\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 34/7-18 was spudded with the\r\nsemi-submersible installation West Alpha on 20 July 1991 and drilled to TD at\r\n2443 m in the Early Jurassic Drake Formation. Problems with retrieving core no\r\n2 led to 4 days lost while fishing. During plug and abandon the cut and pull\r\ntool twisted off and 9 x 8" DC and 7 x 5" HWDP was left on seabed.\r\nThree days were lost while clearing the seabed and cutting the casing and\r\nretrieving the well head, which was eventually retrieved using explosives.\r\nShallow gas was encountered in the pilot hole and a boulder bed was indicated\r\nfrom drilling parameters at 342 m. The well was drilled with spud mud down to\r\n1115 m, and with KCl mud from 1115 m to TD.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eIn the Nordland and Hordaland Groups, the\r\nwell penetrated mainly claystones with relatively minor sandstone intervals. A\r\nPaleocene oil discovery was made, and two cores were cut in the Lista\r\nFormation, Rogaland Group. These were cut in the interval 1774 -1782 m, of\r\nwhich 6.3 m were recovered. RFT pressure measureme",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
}