{
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  "LayerName" : "Wellbore - History",
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    "wlbName" : "34/10-9",
    "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-GB\u003eWell 34/10-9 was drilled on the central\r\npart of the Gullfaks Field. The primary objective was to test sandstones of the\r\nEarly Jurassic Cook Formation. Originally the well was planned to be drilled to\r\na total depth of 2000 m. Results from the well required further drilling into\r\nsandstones of the Statfjord Formation.\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 34/10-9 was spudded with\r\nthe semi-submersible installation Ross Rig on 24 March 1980 and drilled to TD\r\nat 2200 m in the Early Jurassic Burton Formation. As in other wells drilled in\r\nthe area the pore pressure was close to the formation integrity in the pressure\r\ntransition zone. Lost circulation combined with high gas readings, was\r\nexperienced on several occasions in this zone between ca 1730 and 1760 m. Apart\r\nfrom that, the drilling was carried out without any specific problems. The well\r\nwas drilled with seawater and high viscosity slugs down to 845 m, and with a\r\ngel/lignosulphonate mud system from 845 m to TD. From the well site sample\r\ndescription diesel was added to the mud in the interval 1260 to 1350 m.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eThe Brent Group, Ness formation was\r\nencountered at 1833 m, directly underlying the Late Cretaceous Kyrre Formation.\r\nThe Brent Group was hydrocarbon bearing down to base Rannoch Formation at 1945\r\nm with ca 97 m net hydrocarbon bearing sands. The Cook Formation was\r\nhydrocarbon bearing with an oil/water contact at 2118 m. First trace of oil\r\nshows, fluorescence, was seen at 1220 m. Weak shows on claystone and limestone\r\nwere recorded from this depth to 1500 m. Stronger oil shows with "oil\r\nstreaks over shaker" and oil-smell were recorded from 1690 m to 1720 m in\r\nthe Lista Formation. \u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eFour cores were cut in the well. Cor",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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