{
  "type" : "Feature",
  "links" : [
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      "rel" : "collection",
      "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",
  "id" : "746",
  "properties" : {
    "OBJECTID" : 746,
    "wlbNpdidWellbore" : 1719,
    "wlbName" : "34/8-5",
    "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 34/8-5 is located on the A-structure\r\non the Visund Field. This is a NNE-SSW oriented elongated fault block with the\r\nPre-Cretaceous strata dipping towards WNW. The A-Central fault divides the\r\nA-structure into the A-North and A-South compartments. Well 34/8-5 was drilled on\r\nthe southern part of the A-South compartment, ca 6 kilometres SSW of Visund\r\nDiscovery well 34/8-1. The primary objective was to appraise the Jurassic Brent\r\nGroup. A secondary objective was to test reservoir quality of an Oligocene\r\nsubmarine fan system. Possible shallow gas was predicted at 604 and 793 m.\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 34/8-5 was spudded with\r\nthe semi-submersible installation Transocean 8 on 18 February 1991 and drilled\r\nto TD at 3540 m (3528 m TVD) in the Late Triassic Lunde Formation. The 36"\r\nhole was drilled to TD at 406 m, but when attempting to stab in the 30"\r\ncasing the hole could not be located. The well was re-spudded and this time\r\nwith success. An 8 1/2" pilot hole was drilled from 406 m to 850 m to\r\ncheck for shallow gas. No gas was observed. The well was planned vertical, but\r\nbuilt some angle below 2660 m, and at ca 2720 m the deviation was ca 10 deg.\r\nThis angle kept down to TD resulting in a 12 m discrepancy between measured and\r\nvertical depth at TD. There were also some hole curable problems during logging,\r\nbut otherwise operations proceeded without significant problems. The well was\r\ndrilled with seawater and hi-vis pills down to 1197 m and with KCl/polymer mud\r\nfrom 1197 m to TD.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eThinly developed water bearing Oligocene\r\nand Eocene sands were encountered. The Brent Group was encountered at 2855 m\r\nand was found water bearing with oil shows on the cores. The shows continued\r\ndown to 2977 m. Otherwise there w",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
}