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    "wlbNpdidWellbore" : 239,
    "wlbName" : "1/6-1",
    "wlbHistory" : "\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWildcat well 1/6-1 is located ca 15 km\r\nnorthwest of the Ekofisk Field in the southern Norwegian North Sea. It was\r\ndrilled in a crestal position on a large chalk structure shared between Norske\r\nShell's block l/6 and Phillips' block 2/4, the Ekofisk block. Phillips\r\nparticipated in drilling this well on a 50/50 basis. The primary objective was\r\nto investigate Danian and Maastrichtian chalk prospects. Secondary objective\r\nwas to evaluate possible sand developments in the Paleocene and the Lower\r\nCretaceous or older units. Planned total depth was 4572 m (1500 ft).\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 1/6-1 was spudded with the jack-up\r\ninstallation Zapata Nordic on 10 July 1972 and drilled to TD at 4822 m in the\r\nLate Permian Zechstein Group. No major technical problems were encountered in\r\nthe operations and the drilling of this deep well was within the prognosed time\r\nschedule. The drill string stuck at 228 m. After working the string and\r\nspotting pipe-free/diesel the string came loose. Some highly porous limestone\r\nintervals (1 - 8 m thick) resulted in lost circulation problems. The pipe stuck\r\nat 3456 m, but was freed after spotting with pipe-free/diesel. The well was\r\ndrilled with seawater down to 448 m, with seawater/lignosulphonate and a shale\r\ninhibitor (shalock) from 448 m to 1586 m, and with\r\nseawater/lignosulphonate/ligcon (caustisized lignite) from 1586 m to TD.\u003c/p\u003e\r\n\r\n\u003cp\u003eReservoir development was encountered\r\nonly in the Chalk Formations, with hydrocarbon-bearing intervals being\r\ndeveloped in both the Danian and Late Cretaceous. Four hydrocarbon-bearing\r\nintervals were encountered and tested within the Chalk, but only one zone in\r\nthe Maastrichtian (Tor Formation), yielded commercial flows of gas and\r\ncondensate. Reservoir developments in the Danian (Ekofisk Formation) and\r\nearlier Maastrichtian (Hod Formation) were found to be considerably less\r\nfavourable in l/6-l than in the adjacent Ekofisk and West Ekofisk field. The\r\nEarly Cretaceous (Valanginian) w",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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