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    "wlbName" : "9/4-1",
    "wlbHistory" : "\r\n\r\n\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWell 9/4-1 is situated northeast in the\r\nÅsta Graben in the Danish-Norwegian Basin. The chosen well location allowed\r\nmultiple Tertiary to Mesozoic prospects to be tested. The primary objectives of\r\n9/4-1 were Middle Jurassic and Early Triassic (Bunter) sandstones, while basal\r\nTertiary and Early Cretaceous sandstones and Late Cretaceous limestones were\r\nsecondary objectives.\u003c/p\u003e\r\n\r\n\u003cp\u003eThe well is Type Well for the Egersund\r\nFormation.\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 9/4-1 was spudded with the\r\njack-up installation Endeavour on 31 Marc 1968 and drilled to TD at 2963 m in\r\nLate Permian Zechstein salt. Three casing strings were set in the hole.\r\nSeawater was used as drilling fluid down to 1106 m, from where an XP-20\r\nlignosulphonate type mud was used. When the drilling commenced after the\r\n30" conductor pipe was set, several drilling problems arose. The\r\ncirculation was lost, and the hole fell in repeatedly, so the conductor pipe\r\nhad to be re-driven and cemented several times until the hole conditions allowed\r\nthe 20" casing to be set. At 2963 m the drill pipe stuck in salt, and\r\nafter five days of unsuccessful fishing operations, it was decided to abandon\r\nthe hole. The lower part of the hole could not be logged due to the unrecovered\r\nfish.\u003c/p\u003e\r\n\r\n\u003cp\u003eTwenty-five net meter of Jurassic\r\nsandstone was penetrated in a sand body (Sandnes Formation) at 2288 m. The\r\nsection was water wet, but fair shows were logged in the upper 5 m of the sand.\r\nThe remainder had very scattered poor shows. Porosity averaged 25 percent and examination\r\nof sidewall cores indicated a clean permeable sandstone reservoir. The second\r\nprimary objective, the Bunter Sandstone, was represented by an estimated 60 m\r\nof thin interbedded sands and sandstones scattered throughout a thick Triassic\r\nsection composed predominantly of silty red brown to pastel claystones. Due to\r\nlack of logs the interpretation of the Triassic section is somewhat tentative.\r\nLate Cretaceous Chalk ",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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