{
  "type" : "Feature",
  "links" : [
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      "title" : "The collection document"
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      "title" : "This document as JSON"
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  "LayerId" : 254,
  "LayerName" : "Wellbore - History",
  "id" : "712",
  "properties" : {
    "OBJECTID" : 712,
    "wlbNpdidWellbore" : 1557,
    "wlbName" : "7/12-10",
    "wlbHistory" : "\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 7/12-10 was drilled a few km north\r\nof the Ula Field, on the north-eastern side of the Cod Terrace in the North\r\nSea. The primary objective was to prove a commercial volume of oil in the Late\r\nJurassic Ula formation for tie back to the Ula platform. Secondary reservoir\r\npotential existed in both the middle Jurassic and the uppermost part of the\r\nTriassic.\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 7/12-10 was spudded with the\r\nsemi-submersible installation Ross Isle on 8 July 1991 and drilled to TD at 3667\r\nm in the Triassic Skagerrak Formation. After the 30" conductor was set at\r\n167 m, a 17 1/2" pilot hole was drilled without riser to 950 m. No\r\nindications of shallow gas were observed. The well was drilled with seawater\r\nand hi-vis slugs down to 948 m, with Ancoquat water based mud from 948 m to\r\n2730 m, and with KCl/polymer mud from 2730 m to TD. The inhibitive Ancoquat mud\r\nsystem was tested for the first time on the Norwegian Continental Shelf in this\r\nwell. \u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eShows of oil were observed from 3010 m to\r\n3100 m in the Tor limestone. Subsequent intermediate logs however indicated\r\nthat there was not sufficient quantity of oil to warrant testing the limestone.\r\nTop Mandal formation was encountered at 3531 m drilled depth/3538 m logged\r\ndepth. Top Ula formation was seen at 3620m drilled depth/3627 m logged depth.\r\nThis was 56 m deeper than prognosed, and the formation was also ca 30 m thinner\r\nthan expected. The Ula sandstone was found water bearing with no shows and it\r\nwas not in pressure communication with the main Ula field. Top Triassic was\r\nidentified at 3641.5 m logged depth. It was water bearing with no shows.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eTwo conventional cores were cut from 3616\r\nm to 3628 m and 3628 m to 365",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
}