{
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  "links" : [
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      "title" : "The collection document"
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  "LayerId" : 254,
  "LayerName" : "Wellbore - History",
  "id" : "120",
  "properties" : {
    "OBJECTID" : 120,
    "wlbNpdidWellbore" : 122,
    "wlbName" : "7120/12-2",
    "wlbHistory" : "\r\n\r\n\r\n\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\u003eThe primary objectives of well 7120/12-2\r\nwere to test sandstone reservoirs of Middle to Early Jurassic age in the\r\ncentral compartment of the Alke structure, and a deep seismic marker\r\ninterpreted to represent top of a possible carbonate reservoir of Permian age.\r\nA secondary objective was to test sandstones of Early Triassic age. The well\r\nwas planned to be drilled to 5000 m or into basement rocks to serve as the deep\r\ncommitment well on the licence.\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\u003eWell 7120/12-2 was spudded with the\r\nsemi-submersible installation Treasure Seeker on 15 April 1981 and drilled to\r\nTD at 4680 m in basement rocks. After setting the 20" casing the kill line\r\noutlet flange was accidentally damaged and 5 days were spent repairing the BOP.\r\nThe well was drilled with bentonite/seawater mud down to 515 m and with\r\nlignosulphonate (Spersene / XP-20) mud from 515 m to TD. Severe problems were\r\nencountered with gumbo type clays during the interval from about 800 m to 1400\r\nm. \u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eA major fault was penetrated at 2410 m in\r\nthe well, faulting out approximately 400 m of the Triassic section. This is\r\nevident from comparing the Triassic sequences penetrated in the well 7120/12-1\r\nand 7120/12-2. Rocks of Permian age were encountered from 3657 m while\r\nmetamorphic basement was encountered at 4664 m. Hydrocarbon bearing sandstones\r\nwere encountered in the Middle to Late Jurassic and in the Middle to Late\r\nTriassic. \u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eThe "Alke Formation" from 1892\r\nm to 2314 m (Stø, Nordmela, Tubåen , and most of the Fruholmen Formation) was\r\nfound hydrocarbon bearing from 1888 m to the gas/water contact at 1981.5 m.\r\nThis interval consisted of relatively clean, fine to occasionally coarse\r\ngrained, homog",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
}