{
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  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 361,
    "wlbName" : "25/4-3",
    "wlbHistory" : "\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eThe well 25/4-3 is located SW of the\r\nHeimdal field on a Paleocene structure which trends NE-SW and stretches\r\nsouthwards over the block 25/7. The Heimdal sand formation was the main\r\nobjective with a bright spot phenomenon clearly visible on all the seismic\r\nsections through the structure. Seismic mapped vertical closure was assumed to\r\nbe less than 50 m. Danian sands was the secondary target.\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 25/4-3 was spudded with the\r\nsemi-submersible installation Deepsea Driller on 13 October 1974 and drilled to\r\nTD at 2714 m in the Late Cretaceous Jorsalfare Formation.\u003c/p\u003e\r\n\r\n\u003cp\u003eThe tuff marker was encountered at 1974\r\nm, 20 m lower than prognosed. Heimdal sands expected around 2075 m were found\r\nat 2125 m. The Heimdal sand contained 3 m gas down to a gas/oil contact at 2128\r\nm and 5 m oil down to a oil/water contact at 2133 m. A 94 m thick sequence of\r\nDanian sands (Ty Formation) was encountered at 2550 m overlying Late Cretaceous\r\nchalky limestones.\u003c/p\u003e\r\n\r\n\u003cp\u003eThree cores were cut in the Heimdal sands\r\nfrom 2128 m to 2144 m. Three Formation Interval Tests were conducted on the\r\ninterval 2125 - 2133 m. FIT 1 and 3 at 2126.2 and 2126.4 m were unsuccessful\r\ndue to mechanical failures. FIT 2 at 2129.7 recovered oil and mud filtrate.\u003c/p\u003e\r\n\r\n\u003cp\u003eThe well was permanently abandoned on 22\r\nNovember 1974 as an oil and gas 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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}