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  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 1846,
    "wlbName" : "2/2-5",
    "wlbHistory" : "\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eThe main objective\r\nof the exploration well 2/2-5 was to test the hydrocarbon potential of the\r\nUpper Jurassic Ula Formation situated in the Epsilon structure. The structure\r\nis a salt induced anticline situated on a rotated, down thrown fault block in\r\nthe Ula-Gyda Fault zone.\u00A0The Oligocene\r\nVade Formation was the secondary target.\u00A0\r\nA seismic anomaly indicated a potential gas accumulation in this zone.\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 2/2-5 was\r\nspudded by the semi submersible rig Treasure Saga on November 7 1991 and\r\ncompleted February 20 1992 in Permian Zechstein Group. The well was drilled with spud mud down to\r\n918 m, with KCl mud from 918 m to 3484 m, and with HITEMP Polymer mud from 3484\r\nm to TD.\u003c/p\u003e\r\n\r\n\u003cp\u003eThe well penetrated\r\nmainly claystone with minor sandstone in Nordland, Hordaland, and Rogaland\r\nGroup.\u00A0The Vade Formation (within\r\nHordaland Group) proved to be water bearing.\u00A0\r\nAfter drilling throughout a typical sequence of the Shetland and Cromer\r\nKnoll groups, the top of the Tyne Group was encountered at 3418 m. The Ula Formation, which was reached at 3538\r\nm, consisted of an interbedded sequence of sandstone, siltstone, and shale.\u003c/p\u003e\r\n\r\n\u003cp\u003eA 5-meter thick oil\r\nbearing zone within the Ula Formation was encountered at 3671 m. An attempt made to obtain an oil sample\r\nusing RFT failed as the fluid chambers contained mud filtrate only. Geochemical\r\nanalyses of oil from the DST revealed an unusual chemical and isotopic\r\ncomposition unlike any oil in the area. Sediments interpreted to be Triassic\r\nage were penetrated at 3989 m and may represent either a fault gouge above salt\r\nor the up thrown fault block. The well was permanently abandoned as an oil\r\ndiscovery on 19 February 1992.\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\r\nperformed over the interval 3671.25 m to 3675.5 m. The well flowed oil at\r\nmaximum rate 600 Sm3 / day. The oil had a density of 0.86 g/cm3 and the GOR was\r\n44.\u003c/p\u003e\r\n\r\n\r\n",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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