{
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  "LayerId" : 254,
  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 369,
    "wlbName" : "25/11-8",
    "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 25/11-8 was drilled ca 3 km\r\nwest-north west of the 25/11-1 Balder discovery well on the Utsira High in the\r\nNorth Sea. The primary objective was to establish the presence of, and closure\r\non, the thick accumulation of Paleocene zone IB sand in the central part of the\r\nBalder Field, evaluate the geologic interpretation of sand distribution and\r\nreservoir quality in this field and test the flow potential and nature of the\r\nhydrocarbons present.\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 25/11-8 was spudded with\r\nthe semi-submersible installation Dyvi Alpha on 8 September 1979 and drilled to\r\nTD at 1950 m in the Early Paleocene Ekofisk Formation. The well was drilled\r\nwith 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 1655 m. The well encountered two massive sand units in the Paleocene\r\nHeimdal Formation at 1721.5 m and 1743.8 m (dinoflagellate zones IB and II,\r\nrespectively), interpreted as sand lobes deposited from sand-rich turbidity\r\ncurrents in the Balder Deep Sea Fan Complex. Both sands were oil bearing down\r\nto an OWC at 1785 m (1760 m MSL). Some thin sands from about 1705 m to 1720 m,\r\noverlying the massive sands, also appeared to be oil-bearing, and there were\r\ngood shows on a core three meter below the OWC. \u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eNine cores were taken in the interval\r\n1722.5 m to 1800.4 m in the Heimdal Formation. Cores 1 and 4 had no recovery;\r\nthe remaining cores retrieved a total of 41.7 m. No wire line fluid samples\r\nwere taken.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eThe well was permanently a",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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}