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    "wlbNpdidWellbore" : 2728,
    "wlbName" : "25/10-6 S",
    "wlbHistory" : "\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWell 25/10-6 S is\r\nlocated West-Southwest of the Balder field. The main objectives for the well\r\nwere to prove the hydrocarbon potentials of the Heimdal, Ty, and the Hugin\r\nFormations.\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 25/10-6\r\nS well was spudded with the semi-submersible installation "Deepsea\r\nBergen" on 26 December 1995 and drilled deviated to a TD of 4706 m (4281.5\r\nm TVD) in the Middle Jurassic Sleipner Formation. The well was drilled using\r\nbentonite / CMC EHV mud down to 1039 m, with "ANCO 2000" mud from\r\n1039 m to 2377 m, and with oil based "ANCOVERT" mud from 2377 m to\r\nTD. Several drilling problems were encountered below 1339 m and it took 30 days\r\nmore than budget to reach TD. The problems included mud pump failure, MWD failure\r\nand difficulties with controlling the angle, bad weather, and bit problems.\r\nMany of the problems were due to hard formation. The well was drilled\r\nvertically to 1631 m before building angle.\r\n\u003c/p\u003e\r\n\r\n\u003cp\u003eWell 25/10-6 S\r\ndrilled through sediments of Tertiary, Cretaceous and into Jurassic ages. The\r\nwell penetrated the Heimdal Formation at 2317.5 m and the Ty Formation at\r\n2636.5 m. The angle was then approximately 15.5°. The angle increased through\r\nthe Shetland Group and reached a maximum of 43.5° at approximately 4330 m in\r\nthe Vestland Group. The well penetrated the Hugin Formation at 4337.5 m (3995.5\r\nm TVD), 41.5 m deeper than prognosed (at an angle of 42°). The potential\r\nreservoirs in Palaeocene sandstones (Heimdal and Ty Formations) were water\r\nbearing. The Hugin Formation contained hydrocarbons, but the core data and\r\nFMT-results showed tight formation. Three cores were cut in the Hugin\r\nFormation. Of these, a total of only 12.7 m core were recovered because a very\r\nhard formation wore out the bit earlier than expected No fluid samples were\r\ncollected. The well was permanently plugged and abandoned on 22 March 1996 as a\r\ndry well with shows.\u003c/p\u003e\r\n\r\n\u003cp\u003e\u003cb\u003eTesting\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eNo drill ",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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