{
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  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 222,
    "wlbName" : "34/10-7",
    "wlbHistory" : "\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 34/10-7 was drilled on the eastern\r\nsegment of the Gullfaks Field. The primary objective was to test sandstones of\r\nMiddle Jurassic age. Secondary objective was sandstones of Early Jurassic age:\r\nthe Cook and the Statfjord Formations.\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 7 was spudded with\r\nthe semi-submersible installation Ross Rig on 7 January 1980 and drilled to TD\r\nat 2550 m in the Late Triassic Lunde Formation. Two major problems were\r\nencountered during drilling. The first one concerned water sensitive clays\r\nwhich caused difficulties when underreaming the hole for both the 16"\r\nliner and the 13 3/8" casing. The second problem was the leak off test\r\nbelow the 9 5/8" casing shoe. While circulating prior the second leak off test\r\nthe formation broke down. Four cement squeezes were required before a proper\r\nformation test was obtained. The well was drilled with spud mud down to 845 m\r\nand with gel/lignosulphonate mud from 845 m to TD.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eWeak to good oil shows were recorded from\r\n1320 m in the lower Hordaland Group and downwards, mostly in limestone. Strong\r\nshows with live oil in the mud were recorded between 1380 and 1415 m. Oil shows\r\nof variable strength continued all the way down through the Hordaland, Rogaland\r\nand Shetland Groups. The Shetland Group was found resting directly on the Early\r\nJurassic Cook Formation sandstone at 1810 m. Oil was found in sandstones of the\r\nCook and Statfjord Formations. No oil/water contact was observed in the Cook\r\nFormation. In the Statfjord Formation an oil water contact was found at 2066 m.\r\n\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eA total 53.2 m core (67% recovery) was\r\nrecovered in 5 cores in the interval from 1813 m to 1892 m. A sixth core was\r\ntaken with 100% recove",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
}