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  "LayerId" : 254,
  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 34,
    "wlbName" : "31/6-2",
    "wlbHistory" : "\r\n\r\n\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eAppraisal well 31/6-2 was drilled on a\r\nlocation on the south-east periphery on the Troll East gas province. The main\r\nobjective was to test the gas and oil accumulations in sandstones of Late to\r\nMiddle Jurassic age. The planned TD was about 200 m into rocks of Triassic age\r\nto an estimated total depth of 2400 m RKB.\u003c/p\u003e\r\n\r\n\u003cp\u003eThe well is Reference well for the\r\nHardråde Formation and for the undifferentiated Shetland Group in the Troll\r\narea.\u003c/p\u003e\r\n\r\n\u003cp\u003e\u003cb\u003eOperations and results\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWell 31/6-2 was spudded with the\r\nsemi-submersible installation Deepsea Bergen on 18 October 1983 and drilled to\r\nTD at 2020 m in the Early Jurassic Drake Formation. Because of problems with a\r\nleak in 20" casing and lost circulation problems in a major fault, both 13\r\n3/8" and 9 5/8" casing had to be set high. The well was drilled with\r\nsea water and hi-vis pills down to 412 m, with AQUAGEL/seawater spud mud from\r\n412 m to 801 m, with KCl polymer mud from 801 m to TD. At 984 m Lost\r\nCirculation Material -pills were added to cure lost circulation problems.\u003c/p\u003e\r\n\r\n\u003cp\u003eNo reservoir sections were developed\r\nabove the Jurassic. The well encountered 113 m of Draupne shale with top at\r\n1322 m, overlying a 25 m thick Heather Formation sequence. The Sognefjord\r\nFormation sandstone reservoir was encountered at 1460 m with a gas column of\r\napproximately 110 m. No oil leg could be detected from electric logs or FMT's.\r\nOil shows were recorded on sidewall core sandstone in the interval from 1831 m\r\nto 1988 m in the Middle to Early Jurassic. Nine cores were cut from 1435 m to\r\n1619 m in the Heather and Sognefjord Formations. FMT sampling in the Sognefjord\r\nFormation recovered small amounts of gas from 1475 m and 1572 m. A sample from\r\n1577 m gave mud filtrate.\u003c/p\u003e\r\n\r\n\u003cp\u003eThe well was suspended on 11 December\r\n1983 as a gas appraisal.\u003c/p\u003e\r\n\r\n\u003cp\u003e\u003cb\u003eTesting\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eNo drill stem test was performed.\u003c/p\u003e\r\n\r\n\r\n\r\n",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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}