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  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 360,
    "wlbName" : "25/4-2",
    "wlbHistory" : "\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWell 25/4-2 was drilled ca 6 km ENE of\r\nthe 25/4-1 Heimdal Discovery well, which encountered 106 m gas-bearing sands\r\ngas in the Paleocene Heimdal Formation and several thin sands with gas and oil\r\nin the Jurassic and late Triassic. The aim of well 25/4-2 was to explore the\r\nHeimdal sand section on a separate closure.\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 25/4-2 was spudded with the\r\nsemi-submersible installation Neptune 7 on 18 October 1973 and drilled to TD at\r\n2775 m in the Late Cretaceous Jorsalfare Formation. \u003c/p\u003e\r\n\r\n\u003cp\u003eThe well penetrated a 405 m thick section\r\nwith Heimdal Formation sands from 2156.5 m to 2561 m. The reservoir\r\ncharacteristics were quite the same as in well 25/4-1: clean sands with\r\noccurrence of only small shale-sand laminae and a few carbonaceous stringers. A\r\nnine-meter thick oil column was found from top of the reservoir down to an OWC\r\nat 2165.5 m, which was estimated to be 8.5 m higher than in 25/4-1. Other\r\nreservoirs were water-wet except a very thin bed of calcareous sand between\r\n2591 and 2597 m (Våle Formation) with some residual oil according to the log\r\ninterpretation, and where a small methane kick occurred. \u003c/p\u003e\r\n\r\n\u003cp\u003eOne conventional core was cut in the\r\ninterval 2159 m to 2172 m. Only 2166.6 m to 2167.4 m was recovered. Good shows\r\nwith bleeding oil was observed on the recovered piece of core. Three Formation\r\nInterval Tester samples were taken. FIT 1 and 3 were taken at 2162.5 m. The FIT\r\n1 fluid was transferred under bottom hole pressure for PVT studies. FIT 3\r\nrecovered 4.15 1itre of oil, 5.75 litre of filtrate + mud and 136 litre of gas.\r\nFIT 2 at 2165.8 m produced 9.9 1itre of water, filtrate, and mud with some\r\ntraces of oil. \u003c/p\u003e\r\n\r\n\u003cp\u003eThe well was permanently abandoned on 6\r\nDecember 1973 and has been classified as a minor oil discovery.\u003c/p\u003e\r\n\r\n\u003cp\u003e\u003cb\u003eTesting\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eNo drill stem test was performed in the\r\nwell.\u003c/p\u003e\r\n\r\n",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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