{
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  "LayerId" : 254,
  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 213,
    "wlbName" : "25/11-9",
    "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-US\u003eWell 25/11-9 was drilled ca km west-south\r\nwest of the 25/11-1 Balder discovery well on the Utsira High in the North Sea.\r\nThe objective was to establish the presence of a thick accumulation of oil sand\r\nin the southern part of the Balder Field, and to confirm the reservoir quality\r\nof Lobe 8 penetrated in the 25/11-5 well. The top of the reservoir was\r\nanticipated to be at 1688 m subsea.\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\u003eAppraisal well 25/11-9 was spudded with\r\nthe semi-submersible installation Norskald on 4 November 1980 and drilled to TD\r\nat 1910 m in the Late Cretaceous Tor Formation. The well was drilled with Seawater/Gel/Lignosulphonate.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eThe well penetrated the Utsira Formation\r\nand several Skade Formation sands and then penetrated a ca 560 m thick section\r\nof shale/mudstone/siltstone belonging to the lower Hordaland Group before top\r\nBalder Formation was encountered at 1670 m. Drilling revealed two oil sand\r\nzones, one of Eocene age between 1708.5 m and 1742 m (Intra Balder Formation\r\nsand), the second of Paleocene age (Hermod Formation) between 1781 m and 1785 m,\r\nwhich is the Balder Field oil-water contact. A few thin sands in the upper\r\nBalder Formation from 1671 m to1694 m also appeared to be oil bearing. A second\r\nHermod Formation from 1789 to 1818 m was water wet with some weak shows. \u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eFour conventional cores were attempted in\r\nthe interval 1718 to 1744 m in the Intra Balder Formation Sandstone, but only\r\n3.5 m from the first and 1.5 m from the last core was retrieved. No wire line\r\nfluid samples were taken.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eThe well was permanently abandoned on 7\r\nDecember 1980 as an oil appraisal well.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cb\u003e\u003cspan lang=EN-GB\u003e",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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