{
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      "title" : "This document as JSON"
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  "LayerId" : 254,
  "LayerName" : "Wellbore - History",
  "id" : "363",
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    "wlbNpdidWellbore" : 368,
    "wlbName" : "25/11-7",
    "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 25/11-7 was drilled ca 3 km\r\nwest-south west of the 25/11-1 Balder discovery well on the Utsira High in the\r\nNorth Sea. The primary objective was to delineate topographic mounds developed\r\nin the Paleocene sands of the Balder Field. The primary targets were the Zone\r\nII sand (E-70 sand) which was found oil-bearing in the 25/11-5 and the Zone I-B\r\nsands which were found oil-bearing in the 25/11-6.\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 25/11-7 was spudded with\r\nthe semi-submersible installation Norskald on 3 October 1978 and drilled to TD\r\nat 1944 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 600 m thick section\r\nof shales belonging to the lower Hordaland Group before top Balder Formation\r\nwas encountered at 1697 m. The Balder Formation contained some shaley sands\r\nwith poor to no oil shows. The massive I-B sand at 1750.3 m (Heimdal Formation)\r\nwas the only significant oil sand in the well. The well proved 36 m of net oil\r\nsand with a clear oil-water contact at 1786.5 m (1761.5 m MSL), in reasonable\r\nagreement with the Balder Field contact at 1760 m MSL established in 25/11-6. The\r\nZone II (E-70) sand was absent, or possibly an unrecognizable part of the I-B\r\nSand.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eA total of 20.35 m core was recovered in\r\nfour cores from the interval 1748.6 to 1772.3 m in the Lista and Heimdal\r\nFormations. No wire line fluid 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 27\r\nOctober 1978 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\u003eTesting\u003c/span\u003e\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp cl",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
}