{
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  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 3085,
    "wlbName" : "34/10-41 S",
    "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 34/10-41 S was drilled west of the\r\nGullfaks Field and slightly south of the Tordis Field on the Tampen Spur in the\r\nNorth Sea. The primary objective was to test the hydrocarbon potential in the\r\n"A-prospect" at Middle Jurassic Brent Group level. The secondary\r\nobjective was to test the Early Jurassic Statfjord Group.\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 34/10-41 S was spudded with\r\nthe semi-submersible installation Deepsea Trym on 13 July 1997 and drilled to\r\nTD at 3420 m in the Early Jurassic Statfjord Group. At 3098 m problems with\r\nsteering and hole angle made it necessary to sidetrack in order to reach the\r\nplanned secondary target at top Statfjord Group. The well was plugged back ca\r\n270 m and sidetracked (34/10-41 S T2) from 2913 m. The well was drilled with\r\nspud mud down to 1050 m and with Quadrill KCl/glycol mud in both well tracks\r\nbelow 1050 m to TD.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eThe top of the Brent Group was penetrated\r\nat 2553 m, approximately 18 m above the prognosed depth, and proved to be dry.\r\nThe seismic anomaly in top of the prospect turned out to be a lithology effect.\r\nFrom the claystone in the Heather Formation, a very calcareous sandstone was\r\npenetrated in the Tarbert Formation. It is believed that this transition to a\r\nhigh velocity layer is the cause of the amplitude. The Statfjord Group was\r\npenetrated at 3367.5 m and was also proven dry. Except for occasional\r\nfluorescence and cut in claystones between 2472 m and 2775 m there were no\r\nshows in the well. The lack of migrated oil was in agreement with post-well\r\norganic geochemical analyses, where extracts proved to be more or less\r\ncontaminated by the mud and devoid of typical migrated hydrocarbons.\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 lin",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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