{
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  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 316,
    "wlbName" : "15/5-2",
    "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 15/5-2 was drilled in the Ve Sub-basin\r\nin the North Sea, north of the Sleipner Vest Field and 15/5-1 Gina Krog\r\nDiscovery. The main objective of the well was to test possible hydrocarbon\r\naccumulations in Middle to Late Jurassic Bathonian/Callovian transgressive\r\nsandstones and Middle Jurassic Bajocian deltaic sandstones. The well was\r\nlocated in a purposely off-crestal position on an approximately 16 km2 large\r\nstructure some 7 km north-west of the 15/5-1 discovery.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eThe well was planned to penetrate into\r\nthe Triassic with a projected total depth of 4500 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\u003eWildcat well 15/5-2 was spudded with the\r\nsemi-submersible installation Treasure Seeker on 16 August 1978 and drilled to\r\nTD at 4322 m in the Triassic Hegre Group. At 1267 m, the string unscrewed in a\r\ntight section, but it was fished without problems. After drilling to 2293 m,\r\nthe string stuck when pulling out of hole. This time the fish was not recovered\r\nand a sidetrack was performed with kick-of at 1775 m. Heavy weather caused\r\nfurther delays, otherwise the drilling went forth without significant problems\r\nto TD. The well was drilled with seawater mud mixed with gel and Spersene down\r\nto 454 m, and with a Spersene/XP-20 (lignosulphonate) mud from 454 m to TD. At\r\n2232 m 1% Diesel was added to the mud. \u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eTwo hydrocarbon bearing sandstone\r\nintervals were penetrated by the well. In the Jurassic, only a thin Early to\r\nMiddle Bathonian sandstone development was penetrated between 4035 m and 4055 m.\r\nInterbeds of siltstones and shales reduced the 20 m gross pay to a net pay of\r\n7.3 m from wireline log interpretation. Average porosity and average water\r\nsaturation over the pay interval was calculated to 14.3 and 41",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
}