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  "LayerId" : 254,
  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 1872,
    "wlbName" : "25/11-15",
    "wlbHistory" : "\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cb\u003e\u003cspan lang=EN-GB\u003eGeneral\u003c/span\u003e\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eWell 25/11-15 was drilled east of the\r\nBalder Field complex on the Utsira High in the North Sea.\u003c/span\u003e\u003cspan\r\nlang=EN-GB\u003e \u003c/span\u003e\u003cspan lang=EN-GB\u003eThe main objective was to test the\r\nhydrocarbon potential of the Paleocene Heimdal Sand in the Hermod prospect.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cb\u003e\u003cspan lang=EN-GB\u003eOperations and results\u003c/span\u003e\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eWildcat well 25/11-15 was spudded with\r\nthe semi-submersible installation Transocean 8 on 10 November 1991 and drilled\r\nto TD at 2035 m in the Early Jurassic Statfjord Formation. Due to shallow gas\r\nwarning an 8 1/2" pilot was drilled from 239 to 390 m. No shallow gas was\r\nfound. The well was drilled with seawater and viscous bentonite sweeps down to\r\n1312 m and with KCl/PHPA/Polymer mud from 1312 m to TD.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eThe Balder Formation was encountered at\r\n1660 m. It contained rare sandstone stringers close to the top and these had good\r\noil shows. This was the only oil show recorded outside of the Heimdal\r\nFormation. A 64 m thick Heimdal Formation Sandstone was penetrated from 1734 m\r\nto 1798 m. The sandstone was oil bearing down to a well-defined OWC at 1787 m.\r\nThe net pay thickness was 51.88 m with an average porosity of 34.5% and an\r\naverage Sw of 12.5%. \u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eSeven cores were cut from 1680 m to 1799\r\nm, starting 7 m below the top Sele Formation and ending 1 m below the base of\r\nthe Heimdal Formation. A total of 20 good RFT pressure points were recorded\r\ngiving a fluid density of 0.86 g/cc in the hydrocarbon bearing zone. Two fluid\r\nsamples were attempted, but were abandoned after problems with sand plugging.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eThe well was permanently abandoned on 25\r\nDecember 1991 as an oil Discovery.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cb\u003e\u003cspan lang=EN-GB\u003eTesting\u003c/span\u003e\u003c/b\u003e\u003cspan lang=EN-GB\u003e",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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