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    "wlbNpdidWellbore" : 3025,
    "wlbName" : "25/8-9 A",
    "wlbHistory" : "\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWell 25/8-9 is\r\nlocated East-Northeast of the Jotun Field. The two main objectives for drilling\r\nwell 25/8-9 were to test the hydrocarbon potential of Early Palaeocene Heimdal\r\nFormation sandstones (Krap prospect) and secondly sandstones of the Middle\r\nJurassic Hugin Formation. The well found oil in the Early Heimdal Formation and\r\nit was decided to sidetrack (25/8-9 A) to appraise and test the hydrocarbon\r\npotential in this discovery.\u003c/p\u003e\r\n\r\n\u003cp\u003e\u003cb\u003eOperations and results\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eExploration well\r\n25/8-9 was spudded with the semi-submersible installation "Byford\r\nDolphin" on 5 January 1997 and drilled to TD at 2548 m in the Early\r\nJurassic Amundsen Formation. The well was drilled with seawater and\r\npre-hydrated bentonite sweeps down to 1110 m and with "Ancovert" oil\r\nbased mud from 1110 m to TD.& No shallow\r\ngas or boulder beds were encountered in the uppermost well section. Well 25/8-9\r\npenetrated mainly clays and claystones in the Nordland, Hordaland, and Rogaland\r\ngroups with both the Utsira (694 m to 905 m) and Grid (1300.5 m to1345.0 m)\r\nFormation sandstones being present. Interbedded shales and thin Heimdal\r\nFormation sands were encountered between 2096 and 2189 m and hydrocarbons were\r\nfound present in the uppermost reservoir section, however reservoir quality\r\nproved very poor. A FWL/OWC was not possible to define either from MDT\r\n(pressure) or logs, but an ODT at 2069 m TVD SS was established. Top Ty\r\nFormation was reached at 2228 m, consisting of upper clean sand divided by a\r\nshaly unit from a lower clean sandstone divided by a thin shale bed. It\r\ncontinued down to top Shetland Group at 2323 m. No hydrocarbons were found in\r\nthe Ty Formation. The Shetland Group consisted mainly of chalk with the Cromer\r\nKnoll Group consisting of limestones interbedded with claystones and marls. \u003c/p\u003e\r\n\r\n\u003cp\u003eThe Hugin Formation\r\nsandstones came in at 2432 m and were found to be water bearing. One core\r\ntotalling 27 metres was cut in the interval 2098 m to 2126 m in the ",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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