{
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  "LayerName" : "Wellbore - History",
  "id" : "447",
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    "wlbNpdidWellbore" : 455,
    "wlbName" : "34/7-4",
    "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 34/7-4 was drilled on the Snorre E\r\nstructure in the northern part of block 34/7. The primary objectives were to\r\nfurther appraise the reservoir potential of the Statfjord Formation in the\r\nE-structure extension of the Snorre Discovery, to test the oil/water contact\r\nfound in wells 34/7-1, and to test the reservoir quality in this area. A\r\nsecondary objective was to test the reservoir potential in the upper Lunde\r\nFormation, which contain oil in an up-dip location.\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 34/7-4 was spudded with\r\nthe semi-submersible installation Treasure Saga on 19 November 1984 and drilled\r\nto TD at 3115 m in the Late Triassic Lunde Formation. No significant problems\r\noccurred during drilling of the well. The well was drilled with spud mud down\r\nto 963 m, with gypsum/polymer mud from 963 m to 2759 m, and with\r\nlignosulphonate mud from 2759 m to TD.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eExcept for the sandy Utsira Formation\r\n(Late Miocene/Pliocene) and an Early Eocene sandstone unit (1625-1664 m) in the\r\nlower part of the Hordaland Group, the well proved mainly claystones down to\r\nthe Early Jurassic Statfjord Formation at 2535.5 m. The Statfjord Formation was\r\n92 m thick and was oil bearing down to claystones in top Lunde Formation at 2627.5\r\nm. No definite oil-water contact was seen. The N/G ratio in the Statfjord\r\nFormation was 0.26. The average porosity was 20 % and the average water\r\nsaturation was 44%. The Lunde Formation proved mainly a claystone/siltstone\r\nsequence in the upper part, while the lowermost 265 m proved a sequence of\r\nalternating sandstones and claystones with limestone stringers. Of this\r\nsequence some 123 m can be considered as net. The Lunde Formation reservoir was\r\nwater bearing. \u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eThree co",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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