{
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  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 860,
    "wlbName" : "6507/7-5 A",
    "wlbHistory" : "\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWell 6507/7-5 A is located on the\r\nnorthern part of the Halten Terrace off shore Mid Norway and was drilled to\r\nappraise the northern extension of the 6507/7-2 Heidrun Discovery. Well 6507/7-5\r\nA was drilled as a geological sidetrack from the 6507/7-5 well to further\r\nevaluate and appraise the Middle and Lower Jurassic sands in a downthrown fault\r\nblock adjacent to, and NNW of the one tested by the 6507/7-5 well. Prognosed TD\r\nwas at 2721 m MD RKB.\u003c/p\u003e\r\n\r\n\u003cp\u003e\u003cb\u003eOperations and results\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eAppraisal well 6507/7-5 A was spudded the\r\nsemi-submersible installation Nortrym on 6 March 1986. The well was drilled deviated from 6507/7-5 with kick-off point at 1100 m in the 6507/7-5 well and reached\r\nits TD at 2673 m in the Early Jurassic Tilje Formation. TD location was\r\napproximately 640 m NNW from the top hole location. No shallow gas was recorded\r\nduring drilling. Due to technical problems, prognosed depth was not reached.\r\nThe drill string became differentially stuck during a connection 9 m off\r\nbottom. After 7 days of fishing, the string was backed off, leaving a 387 m\r\nfish in the hole. Hence there were no final logs run on this well. Two days\r\nwere spent waiting for weather. The well was drilled with KCl/polymer mud from\r\nkick-off to TD.\u003c/p\u003e\r\n\r\n\u003cp\u003eThe well proved an even longer hiatus in\r\nthis well than in well 6507/7-5: from the Late Cretaceous Turonian to the\r\nMiddle Jurassic Aalenian/Bajocian. Hence, no Late Jurassic sediments were\r\nencountered. The Fangst Group, Garn Formation, came in at 2554.5 m (2420.6 m\r\nTVD RKB) and the Båt Group at 2582.5 m (2445.2 m TVD), with top Tilje Formation\r\nat 2598.0 m (2458.8 m TVD). Analysis of cores indicated good to excellent\r\nporosity and permeability with shows. \u003c/p\u003e\r\n\r\n\u003cp\u003ePoor to moderate shows occurred in\r\nsiltstone and sandstone samples from the Cretaceous between 2300 and down to\r\ntop Jurassic. In the Fangst Group oil shows appeared first at 2560 m, ca 3 m\r\ndown from the top of core no 1 and 5 m below top Garn Formation. A transitiona",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
}