{
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      "title" : "The collection document"
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  "LayerId" : 254,
  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 199,
    "wlbName" : "15/12-3",
    "wlbHistory" : "\r\n\r\n\u003cp\u003eWell 15/12-3 is located in the South\r\nViking Graben in the North Sea, south of the Sleipner Øst Field. The primary objective\r\nof the well was to test possible hydrocarbons in late Jurassic sand. This sand\r\nwas proven in 15/12-2. Secondary objectives were Danian and Rotliegendes sands.\r\nMinor Danian sand beds were proved in 15/12-1, and further west on the UK side oil was produced from Palaeocene sands on the Maureen Field. The well should be\r\ndrilled through ca 1100 m of prognosed salt and 100 m into the Rotliegendes or\r\nto a total depth of 4900 m. \u003c/p\u003e\r\n\r\n\u003cp\u003e\u003cb\u003eOperations and results\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWell 15/12-3 was spudded with the\r\nsemi-submersible installation Nordraug on 21 June 1980 and drilled to TD at\r\n4450 m in Early Permian Rotliegendes sandstone. After setting the 13 3/8"\r\ncasing the rig crew went on strike from 20 July to 14 August. While drilling 12\r\n1/4" hole with salt saturated mud the bottom hole assembly got stuck at\r\n2715 m when pulling out of the hole. Eleven days were spent working on the fish\r\nbefore the hole was eventually sidetracked from 2488 m. The well was drilled\r\nwith seawater/bentonite/lignosulphonate mud down to 2185 m, with salt saturated\r\npolymer mud from 2185 m to 3361 m, and with oil based mud (Oilfaze) from 3361 m\r\nto TD.\u003c/p\u003e\r\n\r\n\u003cp\u003eThe primary objective, Jurassic sandstone,\r\nwas only a few meter thick. The sand was found deeper and was thinner than\r\nexpected. The well proved no sand in Palaeocene. The other secondary objective,\r\nRotliegendes sandstone, was highly interbedded with shale. None of the sands had\r\nshows of hydrocarbons. \u003c/p\u003e\r\n\r\n\u003cp\u003eOne core was cut from 3256 to 3263 m in\r\nthe Zechstein Group above the salt. A second core was cut near final TD in the\r\nRotliegendes Group from 4424 to 4433 m. No wire line fluid samples were taken.\u003c/p\u003e\r\n\r\n\u003cp\u003eThe well was permanently abandoned on 22\r\nDecember 1980 as a dry well.\u003c/p\u003e\r\n\r\n\u003cp\u003e\u003cb\u003eTesting\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eNo drill stem test was performed.\u003c/p\u003e\r\n\r\n\r\n\r\n",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
}