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  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 342,
    "wlbName" : "18/10-1",
    "wlbHistory" : "\r\n\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWell 18/10-1 is located in the Egersund Basin in the North Sea, ca 16 km southeast of the 17/12-1R Bream Discovery. It was\r\ndesigned to test a seismic structure on the same trend as the Bream discovery.\r\nThe primary target was to test possible hydrocarbon accumulation in Jurassic\r\nsandstones on. Planned TD is about 150 to 200 m below Jurassic sandstone in a\r\nshaly-sandy sequence of Early Jurassic or top of Triassic.\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 18/10-1 was spudded with the\r\nsemi-submersible installation Dyvi Alpha on 19 October 1979 and drilled to TD\r\nat 2800 m in the Triassic Skagerrak Formation. \u003c/p\u003e\r\n\r\n\u003cp\u003eA thick Late Jurassic shale sequence with\r\nlimestone stringers was penetrated before reaching the target Middle Jurassic\r\nsands. The sands (Sandnes and Bryne Formations) were encountered at 2405 m,\r\nclose to prognosis. The reservoir consisted of two zones separated by a thin\r\nshale barrier between 2427 and 2433 m. Based on FMT and DST pressure\r\nmeasurements the upper zone appeared slightly overpressured relative to the\r\nlower, suggesting a compartmentalized reservoir. The reservoirs were found\r\nhydrocarbon bearing and an OWC was found at 2437 m in the lower zone. The\r\nlithology below the target reservoir section, from 2483 m to TD, was\r\npredominantly sandstone, fine in the upper part, becoming medium to coarse\r\ndownwards. Frequent thin interbeds of shale and marl, occasionally also thin\r\nstringers of limestone were encountered. The sequence was entirely water\r\nbearing. Weak direct fluorescence and cut appears at 2420 m, becoming very good\r\nin the intervals 2423 m to 2430 m and 2433 m to 2440 m, then the shows get\r\nweaker and disappear below 2444 m. \u003c/p\u003e\r\n\r\n\u003cp\u003eOrganic geochemical analyses showed an\r\nimmature well all through (%Ro = 0.5 at TD). TOC in the Late Jurassic shale\r\nincreased gradually from ca 0.8% at top Jurassic to ca 1 % at 2200 m. A peak\r\nTOC is reached in the Tau Formation with 4.5 % TOC in cuttings and 6.9 % in a\r\nsidewall core. The hydroge",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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