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  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 86,
    "wlbName" : "7/11-6",
    "wlbHistory" : "\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWell 7/11-6 is located approximately half\r\nway between the Mime and the Ula Fields in the North Sea. The primary objective\r\nof well 7/11-6 was to test Late Jurassic sandstones. The secondary objective of\r\nthe well was to test sandstones of Triassic age. The well was planned to reach\r\ntotal depth at 4400 +/- 200 m, approximately 100 m in to the Triassic.\u003c/p\u003e\r\n\r\n\u003cp\u003e\u003cb\u003eOperations and results\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWildcat well 7/11-6 was spudded with the\r\nsemi-submersible installation Treasure Seeker on 9 August 1982 and drilled to\r\nTD at 4500 m in the Triassic Smith Bank Formation. The well was drilled without\r\nincident except some problems with gumbo in the 17 1/2" section. The well\r\nwas drilled with seawater and high viscosity pills of pre-hydrated\r\nbentonite/lime mud down to 670 m, with KCl/Drispac mud from 670 m to 2060 m,\r\nwith KCl/Drispac mud converting to gel/lignosulphonate mud in the 2060 m to\r\n3970 m section, and with a lignosulphonate mud from 3970 m to TD.\u003c/p\u003e\r\n\r\n\u003cp\u003eThe well encountered a Late Jurassic Ula\r\nFormation gross sand interval of 47 m between 4098 and 4145 m. Based on wire\r\nline log evaluation net sand was 21.25 m with an average porosity of 15.8%. The\r\nUla Formation rests unconformable on the Triassic Smith Bank Formation, which\r\nconsists of interbedded sandstones and shales with local siltstones and rare\r\nstringers of limestone. Both the Jurassic and Triassic sandstones proved water\r\nbearing, but with residual hydrocarbons in the Ula Formation, based on logs.\r\nShows were reported in the interval 4007.5 m to 4038 m in the Late Jurassic hot\r\nshale unit, in the Ula Formation, and some meters into the Triassic.\u003c/p\u003e\r\n\r\n\u003cp\u003eFour cores were taken in the 8 3/8"\r\nsection. Cores 1 to 3 were cut mainly in the Ula Formation. The lower part of\r\ncore 3 and all of core 4 were cut in the Triassic Smith Bank Formation.\r\nThirteen RFT pressure tests were attempted in the well over the interval of\r\n4106 to 4204.5 m. From the pressure tests a water gradient of 0.44 psi/ft\r\n(1.014 gm/c",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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