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  "LayerName" : "Wellbore - History",
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    "wlbName" : "7/11-8",
    "wlbHistory" : "\r\n\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWildcat well 7/11-8 is located on the Cod\r\nTerrace of the North Sea, between the Mime Field to the South and the 7/8-3\r\nDiscovery to the North. The primary objective was to test Late Jurassic\r\nsandstones of the Ula Formation. Secondary objective of the well was to test\r\ncontinental sandstone reservoirs of Triassic age as seen in some nearby wells.\r\nRocks of early and middle Jurassic age were thought to be absent at this\r\nlocation. The well was planned to be drilled to 4550 + 100 m, approximately 730\r\nm into the Triassic to penetrate a strong intra Triassic reflector.\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 7/11-8 was spudded with the\r\nsemi-submersible installation Treasure Scout on 22 September 1983 and drilled\r\nto TD at 4750 m, almost one km into Triassic sediments. Gumbo problems and\r\nproblems with the seal assembly were experienced when running the 13 3/8"\r\ncasing. The well was drilled with seawater and pre-hydrated bentonite down to\r\n620 m, with KCl polymer mud from 620 m to 3673 m, and with a bentonite/lignosulphonate/barite/lignite\r\nmud system from 3673 m to TD.\u003c/p\u003e\r\n\r\n\u003cp\u003eThe well encountered water bearing\r\nTriassic sandstones directly underlying lower Cretaceous shales. The Ula\r\nFormation was thus missing. No shows or other hydrocarbon indications were seen\r\nin the well. The intra Triassic marker was found at 4605 m in a shaly sequence.\u003c/p\u003e\r\n\r\n\u003cp\u003eOne core was cut in the Triassic\r\nsandstones from 3725 to 3743.95 m. The entire core consisted of greyish red to\r\nmoderate brown sandstones, with occasional bands of greenish black to greenish\r\ngrey sandstones. The RFT tool was run to obtain pressure points in the Triassic\r\nsands. The pressure data indicated a water gradient of 1.09 g/cm3 and no fluid\r\nsample was taken\u003c/p\u003e\r\n\r\n\u003cp\u003eThe well was permanently abandoned on 12\r\nDecember 1983 as a dry well.\u003c/p\u003e\r\n\r\n\u003cp\u003e\u003cb\u003eTesting\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eNo drill stem test was performed\u003c/p\u003e\r\n\r\n\r\n\r\n",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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}