{
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  "LayerId" : 254,
  "LayerName" : "Wellbore - History",
  "id" : "63",
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    "wlbNpdidWellbore" : 65,
    "wlbName" : "30/9-1",
    "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 30/9-1 was drilled on the southeast\r\npart of the Oseberg fault block (Alpha structure) in the North Sea. The Alpha structure\r\nis an eastward tilted fault block that contains proven reserves of oil and gas\r\nin the Middle Jurassic Brent Group sandstone reservoir. The primary objective\r\nof the well was to establish the oil/water contact in this part of the\r\nstructure.\u003cb\u003e \u003c/b\u003eThe well was planned to be drilled to a total depth of 2850 m,\r\napproximately 100 m into the Dunlin Group.\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 30/9-1 was spudded with\r\nthe semi-submersible installation Treasure Seeker on 24 October 1982 and\r\ndrilled to TD at 2895 m in the Early Jurassic Drake Formation. No significant\r\nproblem was encountered in the operations. The well was drilled with\r\nseawater/hi-vis pills and pre-hydrated bentonite down to 969 m, with\r\nKCl/Drispac mud from 969 m to 2515 m, and with KCl/polysal mud from 2515 m to\r\nTD.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eThe Brent Group was found hydrocarbon\r\nbearing from 2685 m down to 2738 m where the free water level was established.\r\nThis interval comprises the whole of the Ness Formation and the uppermost 3 m\r\nof the Etive Formation. Net pay in the interval was 10.5 m. Poor oil shows were\r\nrecorded on limestone cuttings in the interval 2281 to 2232 m in the uppermost\r\nShetland Group. Good oil shows were recorded through the oil column of the\r\nreservoir. Below the contact at 2738 m, shows became weaker and patchy down to\r\n2778 m. Below this depth only some weak shows on claystone from three sidewall\r\ncores in the interval 2872 m to 2895 m were reported.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eSeven conventional cores were cut from 2682\r\nm at the top of the Ness formation to 2784.9 m, into the Dunlin Group shales. RFT\r\nfluid samples were ta",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
}