{
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  "links" : [
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      "type" : "application/geo+json",
      "title" : "The collection document"
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      "title" : "This document as JSON"
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  "LayerId" : 254,
  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 1062,
    "wlbName" : "2/7-20",
    "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 2/7-20 was drilled on the "South\r\nEldfisk structure", later called Embla. The 2/7-9 well, drilled in 1973,\r\ntested oil at uneconomic rates from a thick pre-Late ?Jurassic sand sequence on\r\nthis structure. Well 2/7-9 established a 111 m pay section with average\r\nporosity of 13% and 55% oil saturation. A clear OWC was found at 4387 m MSL. Following\r\na 1986 re-evaluation of the test it was concluded that the poor test results\r\nmight have been due to mechanical problems. Subsequently the 2/7-20 well was\r\nspudded to test the previously encountered sandstones. The objectives of the\r\nwell were to test "economic" flow rates from sands on the South\r\nEldfisk structure below the Late Jurassic shales of the Mandal Formation. At\r\nthe time of drilling the cost of a subsea completion had been estimated to be US$\r\n12 million which meant that flow rates in excess of 286 m3 oil/day were\r\nconsidered economic. Well 2/7-20 was placed on a separate and higher fault\r\nblock in the structure than the one drilled by 2/7-9.\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\u003eWildcat well 2/7-20 was spudded with the\r\nsemi-submersible installation Dyvi Stena on 15 October 1987. The well was re-spudded\r\nthree times because of collapsed hole problems. After drilling riserless to 608\r\nm the lower part of the hole collapsed after encountering a gas sand that\r\nresulted in the loss of drill pipe. The well was sidetracked at 234 m, and 13\r\n3/8" casing was set above the Eocene at 2439 m. A drilling break was\r\nencountered at 4084 m. After drilling a further 2 m, 100% sands with good shows\r\nwere circulated up. High pressures together with the long section of open hole\r\nnecessitated plugging back and sidetracking immediately below the 13 3/8"\r\ncasing shoe. No logs were run at TD in this hole before plugging back. Drilling\r\nthe sid",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
}