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    "wlbNpdidWellbore" : 1683,
    "wlbName" : "34/8-4 S",
    "wlbHistory" : "\r\n\r\n\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWell 34/8-4 S is located on the Visund\r\nField, A structure where previous wells 3/8-1, 3/8-3, and 3/8-3 A had proved\r\nhydrocarbons in the Brent Group. The main target in 34/8-4 S was the\r\nhydrocarbon potential in the Lomvi Formation on the A-structure. Secondary\r\ntargets were the hydrocarbon potentials of the Statfjord and Lunde B/C\r\nformations on the A south compartment. Pressure measurement should be acquired\r\nfrom the Lunde- and Lomvi Formations in order to evaluate the sealing potential\r\nof the Middle to Late Triassic sequence. The well was designed for temporary\r\nabandonment and re-entry as a subsea producer. The well was planned as a\r\ndeviated hole to penetrate top Statfjord, Lunde B/C and the Lomvi Formations\r\nwithin structural closure, leaving more than 10 mill Sm3 oil untested up-dip.\r\nBoulders could be encountered between 350 m and 395 m. Two intervals with\r\npossibility for shallow gas were identified at 446 m and 477 m.\u003c/p\u003e\r\n\r\n\u003cp\u003e\u003cb\u003eOperations and results\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWildcat well 34/8-4 S was spudded with the\r\nsemi-submersible installation Maersk Jutlander on 6 Desember 1991 and drilled\r\nto TD at 4150 m in rocks of Triassic age. Drilling started with an 8 1/2"\r\npilot hole checking for shallow gas. No boulders or shallow gas was\r\nencountered. Significant technical problems were encountered during drilling of\r\nthis well and one third of the total rig time was counted as down time. The\r\nlongest period of down time occurred after TD in the 17 1/2" hole where\r\n31.6 days were spent repairing the BOP and wellhead. The planned TD at 4478 m\r\nwas not reached due to operational problems. The pipe was backed off at 3936 m\r\nand the borehole was logged from this depth and up to the 9 5/8" casing\r\nshoe. The well was drilled vertical down to ca 2310 m where it started to build\r\nangle up to 30 ° at ca 2680 m. From here to TD the deviation varied between 30\r\n° and 50 °.\u00A0 The well was drilled with spud mud and seawater down to 1165 m,\r\nwith KCl / polymer mud from 1165 m to",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
}