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  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 856,
    "wlbName" : "7/11-9",
    "wlbHistory" : "\r\n\r\n\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWell 7/11-9 is located ca 5.5 km from the\r\n  UK border, North of the Cod and Mime Fields on the Cod Terrace. It was\r\ndesigned to test the sedimentary sequences that were seismically correlateable\r\nwith Ula sands in the 7/11-5 Mime Discovery. The closure of prospect was\r\ndependent on pinch-out of the Ula sands and sealing Triassic rocks over the\r\nfaults to the east and west. Prognosed top of the Ula sands was at 4119 m, and\r\nthe thickness 90 m. Prognosed TD was at 4260 m in Triassic rocks. \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 7/11-9 was spudded with the\r\nsemi-submersible installation Byford Dolphin on 26 November 1985 and drilled to\r\nTD at 4271 m in the Triassic Smith Bank Formation. The well was drilled with\r\nseawater and hi-vis pills down to 723 m and with KCl polymer mud from 723 m to\r\n3947 m. Due to stuck drill pipe at 3706 m pills with diesel/Imco Spot/Pipelax\r\nwas spotted. A total of six days were spent freeing the pipe and pulling out of\r\nhole before drilling could commence. The 8 3/8" section from 3947 m to TD\r\nwas drilled with KCl polymer with additions of Chrome lignite starting at 4084\r\nm.\u003c/p\u003e\r\n\r\n\u003cp\u003eTop limestone came in at 3162 m, and the\r\nlimestone continued down to top Rødby Formation at 3899 m. Top Jurassic was\r\nencountered at 4027 m. Grey/brownish siltstone of the Farsund Formation was\r\nencountered at 4093 m. The Ula Formation sand came in at 4168.5 m, and three\r\ncores were cut in the interval 4165- 4209.7 m. The cores indicated a 14 m\r\ncolumn of shows all through the Ula sands down to top Triassic rocks at 4182.5\r\nm. RFT-tests were run and showed very low permeability, which was confirmed by\r\na DST-test. No shows were reported from above or below the Ula Formation. One\r\nRFT sample was recovered from 4181 m. The Horner corrected temperature from 5\r\nhighly consistent wire line BHT's at TD gave a temperature of 170 deg C. \u003c/p\u003e\r\n\r\n\u003cp\u003eThe well was permanently abandoned on 9\r\nMarch 1986 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\u003eOne DST-test",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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