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  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 1868,
    "wlbName" : "7/7-2",
    "wlbHistory" : "\r\n\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWell 7/7-2 is located ca 8 km east of the\r\n UK border on the Jæren High in the North Sea. It was the second commitment\r\nwell within the licence PL-148 and was designed to test the A-prospect,\r\ninterpreted as a Late Jurassic channel sandstone. Planned TD was in Permian\r\nsediments or 3500 m, whichever came first.\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 7/7-2 was spudded with the\r\nsemi-submersible installation Deepsea Bergen on 20 January 1992 and drilled to\r\nTD at 3430 m in the Permian Zechstein Group. The well took 100 days to drill\r\nand test, 20 days more than planned. This was mainly due to a 25% higher pore\r\npressure than prognosed in the reservoir, resulting in a plug-back and 9\r\n5/8" casing above reservoir, and not at TD as programmed. Other\r\ncontributing factors were re-spud after lost stinger in 30" casing, two\r\noccasions of pulling BOP due to leakage and leak on swivel stem on top drive.\r\nThe DSTs experienced severe difficulties with leakage and operation of down\r\nhole valves resulting in two mis-runs with testing string and a shortened DST\r\nno. 2. The well was drilled with CMC EHV and seawater down to 904 m, with\r\nKCl/PHPA/PAC from 904 m to 2744 m, and with ANCOTEMP mud from 2744 m to TD. \u003c/p\u003e\r\n\r\n\u003cp\u003eThe greater part of the prospect, the\r\nLate Jurassic Ula sandstone was encountered at 3327 m, and proved to be sandy.\r\nThe Jurassic reservoir lithology consisted primarily of fine, well-sorted\r\nsilica-cemented sandstone with poor visual porosity. Subsequent testing from\r\n3348 - 3350 m showed a very tight formation, however testing from 3333 - 3342 m\r\nyielded oil. No oil-water contact was encountered, but organic geochemical\r\nanalyses detected oil saturation in two intervals from the top of the\r\nreservoirs down to 3341, and from 3345 down to 3347 m. \u003c/p\u003e\r\n\r\n\u003cp\u003eFour and a half m of shaley core was\r\nrecovered in two cores from 3242 m to 3247 in the Mandal Formation. Good oil\r\nshows were observed in these cores. Organic geochemical analyses proved them",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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}