{
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  "LayerName" : "Wellbore - History",
  "id" : "594",
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    "wlbNpdidWellbore" : 1069,
    "wlbName" : "33/9-12",
    "wlbHistory" : "\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 33/9-12 was drilled on the Statfjord\r\nØst Discovery on Tampen Spur in the North Sea. The field was discovered in late\r\n1976 by well 33/9-7, which proved oil in the upper portion of the Brent Group.\r\nThe well 34/7-5, which was drilled on the northerly segment of the structure,\r\npenetrated an oil-bearing Brent section down to the same structural level as\r\nseen in well 33/9-7, suggesting communication between the wells. However,\r\nneither well was drilled in a location that could demonstrate oil in the major\r\nLower Brent reservoir or allowed a clear definition of the oil water contact.\u00A0\r\nThe objective of well 33/9-12 was to test the Lower Brent Group and to\r\nestablish the oil-water contact.\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 33/9-12 was spudded with\r\nthe semi-submersible installation Ross Isle on 19 June 1987 and drilled to TD\r\nat 2959 m in the Triassic Hegre Group. The well was drilled with spud mud down\r\nto 360 m, with gypsum/polymer mud from 360 m to 2120 m, and with\r\ngel/lignosulphonate mud from 2120 m to TD.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eWeak shows in traces of sand was\r\ndescribed from 2220 m and down in the Shetland Group. Top Brent Group, Tarbert\r\nFormation was penetrated at 2461 m. The Brent Group had a total oil leg of\r\n52.25 metres above the oil-water contact in the Etive formation at 2513.75 m\r\n(2491. 75 m TVD MSL). Oil shows continued down to 2530 m; below this depth\r\nshows became weak and patchy. The Statoil Group was encountered at 2814 m. It\r\nwas water wet and pressure measurements showed that the Statfjord formation is\r\nnot in pressure communication with the Brent group. \u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eThree cores were cut in the interval 2467\r\nm to 2566 m in the Brent Group and into the Uppermost Dunlin Group with 95 to\r\n99.7% recovery.\u00A0 ",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
}