{
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  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 1778,
    "wlbName" : "15/12-8",
    "wlbHistory" : "\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWildcat well 15/12-8 was drilled ca 3.5\r\nkm east of the 15/12-4 well, which made the Varg oil discovery in Jurassic and\r\nTriassic sandstones. The main objective of the well was to test the potential\r\nfor hydrocarbons in sandstones of Oxfordian and Triassic age. Seismic anomalies\r\nat 437, 467, 479 and 803 m indicated possibility for shallow gas. Planned TD\r\nfor the well was 3260 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\u003eWell 15/12-8 was spudded with the\r\nsemi-submersible installation Deepsea Bergen on 5 June 1991 and drilled to TD at 3054 m in the Triassic Skagerrak Formation. No significant problems occurred\r\nduring operations. The well was drilled with seawater / hi-vis pills / CMC down\r\nto 615 m, with KCl/polymer mud from 615 m to 2855 m, and with Ancotemp/bentonite\r\nmud from 2855 m to TD. No shallow gas was encountered.\u003c/p\u003e\r\n\r\n\u003cp\u003eJurassic Vestland Group sandstone was\r\nencountered hydrocarbon-bearing at 2838 m. The hydrocarbon column extended 23 m\r\ninto Triassic sandstone of the Skagerrak Formation. The gas/water contact was\r\nestimated to 2877 m, confirmed by FMT pressure gradients and wire line logs. The\r\nwell was tested, and since no core was cut through the reservoir, the well was\r\nsidetracked at 2623 m with TD at 2940 m. The sidetrack was drilled with\r\nAncotemp/bentonite mud. Three conventional cores were cut in the interval 2841\r\n- 2902 m. The sidetrack was formally named 15/12-8 A.\u003c/p\u003e\r\n\r\n\u003cp\u003eThe FMT tool was run in well 15/12-8 and\r\n15/12-8A. One segregated sample was taken at 2863 m in 15/12-8 (gas, condensate\r\nand mud filtrate) and another in the water zone at 2888 m in well 15/12-8 A (recovered\r\nmud only due to seal failure). \u003c/p\u003e\r\n\r\n\u003cp\u003eWell 15/12-8 was permanently abandoned on\r\n 14 July 1991 as a gas/condensate discovery. The 15/12-8 A sidetrack was\r\npermanently abandoned on 29 July as a gas/condensate appraisal well.\u003c/p\u003e\r\n\r\n\u003cp\u003e\u003cb\u003eTesting\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eOne DST test was performed in 15/12-8 in\r\nthe interval 2838 - 2869 m. The well produced gas-condensate with a de",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
}