{
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  "LayerId" : 254,
  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 309,
    "wlbName" : "15/3-1 S",
    "wlbHistory" : "\u003chtm\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 15/3-1 S was drilled west of the\r\nGudrun Terrace on the east flank of the North Sea Central Graben. The primary\r\nobjective was to test sands in the Middle Jurassic (Dogger sands). Secondary objectives\r\nwere the Early Tertiary, Danian, Early Cretaceous sands. Triassic sandstones\r\nand Zechstein dolomites down to the "economic basement" were also\r\npossible targets. \u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eThe well is reference well for the Ty,\r\nDraupne, and Heather formations.\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 15/3-1 S was spudded with\r\nthe semi-submersible installation Deepsea Driller on 27 November 1974 and\r\ndrilled without significant problems to 4400 m. While circulating before\r\nlogging the pipe stuck and the hole started to kick. After unsuccessful efforts\r\nto free the pipe the well was plugged back and sidetracked from 3985 m. The\r\nsidetrack was drilled without further significant problems to final TD at 5129\r\nm in the Middle Jurassic Hugin Formation. \u00A0\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eThe well penetrated water-bearing Hermod,\r\nHeimdal and Ty formation sandstones from 2215 to 2715 m. The Ty Formation from\r\n2556 m was reported as the best of these with a main body of clean sand from\r\n2599 to 2711 m. Top Viking Group, Draupne Formation was encountered at 3947 m.\r\nThe Draupne Formation contained many oil and gas bearing Intra-Draupne\r\nFormation sandstones. Of these the best reservoirs were found in the intervals\r\n4083 to 4317 m with OWC at 4218 m, and 4442.5 to 4610 m with OWC at 4486 m.\r\nTotal net pay in these two intervals together were 32 m with 22 - 19 %\r\nporosity. Geochemical analyses indicated good source rock properties in the\r\nshale interbeds, with a maturity ranging from early to late oil window\r\n(vitrinite reflectance from 0.6 to 0.9 %R",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
}