{
  "type" : "Feature",
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      "title" : "The collection document"
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  "LayerId" : 254,
  "LayerName" : "Wellbore - History",
  "id" : "204",
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    "OBJECTID" : 204,
    "wlbNpdidWellbore" : 208,
    "wlbName" : "31/2-4",
    "wlbHistory" : "\r\n\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWell 31/2-4 is located some 10 km NNW of\r\nthe discovery well 31/2-1 in a separate fault compartment near the crest of the\r\nJurassic gas accumulation. This crestal area appeared also to coincide with the\r\nculminations of all deeper horizons that could be mapped. The well had two main\r\nobjectives. The first was to appraise the Jurassic gas accumulation in the\r\n31/2-1 Troll Discovery in a location with nearly maximum gross hydrocarbon\r\ncolumn. The well should test lateral variations in this reservoir. The second\r\nmajor objective was to explore deeper Triassic/Palaeozoic Formations. The well\r\nwould test possible hydrocarbon accumulations under the Late Jurassic Troll\r\nreservoir, explore possible pre-Jurassic source rocks, and provide geological\r\nages for deep horizons and thus improve the regional geological setting. \u003c/p\u003e\r\n\r\n\u003cp\u003eTD of the well was proposed to be 5000 m\r\nbelow sea level or in Palaeozoic formations whatever came first.\u003c/p\u003e\r\n\r\n\u003cp\u003e\u003cb\u003eOperations and results\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWell 31/2-4 was spudded with the\r\nsemi-submersible installation Borgny Dolphin on 1 September 1980 and drilled to\r\nTD at 815 m in the Hordaland Group. The well was drilled with seawater and\r\nhi-vis pills. After having set the 20" casing, the well was secured and\r\nsuspended on September 13 due to a farm out of the rig to Statoil. Statoil had\r\nrequested the Borgny Dolphin to be released to secure their well 34/10-10,\r\nwhich was blowing gas from a shallow gas zone. \u003c/p\u003e\r\n\r\n\u003cp\u003eThe well was classified as a dry well.\u003c/p\u003e\r\n\r\n\u003cp\u003e\u003cb\u003eTesting\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eNo drill stem test was performed in the\r\nwell.\u003c/p\u003e\r\n\r\n",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
}