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    "wlbNpdidWellbore" : 1702,
    "wlbName" : "2/4-16",
    "wlbHistory" : "\r\n\r\n\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWell 2/4-16 was drilled on the eastern\r\nmargin of the Feda Graben North of the Albuskjell and Ekofisk Fields in the\r\nNorth Sea. Geologically the area consists of three sub-platforms. These are\r\nseparated by large NW-SE striking normal faults down-faulted to the southwest\r\nand stepping down to the Feda Graben in the southern part of the block. The\r\n2/4-16 well is located in the centre of the licence area on the same down\r\nfaulted segment as the blowout wells 2/4-13, -14 and -15. Shallow gas was\r\npredicted from seismic anomalies at 10 different levels, and several\r\nprecautions and actions were carried out to be able to handle potential\r\ngas-charged shallow gas.\u003c/p\u003e\r\n\r\n\u003cp\u003eThe main objective for the well was to\r\ntest the Late Jurassic, expected to contain a thick sand resting unconformable\r\non the Middle Jurassic. This objective was the basis also for the 2/4-14 well.\r\nA secondary objective for the well was to penetrate the Middle Jurassic and 150\r\nm into the Triassic sequence to test for possible hydrocarbon bearing\r\nsandstones sequences.\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 was spudded with the\r\nsemi-submersible installation Treasure Saga on 7 May 1991 and drilled to TD at\r\n4996 m in the Middle Jurassic Bryne Formation. Shallow gas was detected at 522,\r\n606, 628 and 675 m during drilling of 9 7/8" pilot hole. While drilling\r\nthrough very hard chalk rocks in the 12,6" section severe problems with\r\nthe drilling equipment was experienced. The hard rocks also caused 8.5 days of\r\ndelay due to ten washouts and fishing jobs. In addition the vibration together\r\nwith high temperature caused twelve failures to the MWD tools, and also\r\nproblems related to equipment deliveries. When drilling down to 4996 m the top\r\ndrive saver sub had to be changed out due to a washout. During change of saver\r\nsub, the well started flowing uncontrolled up through the drill string, and the\r\ndrill pipe was cut with the shear ram. Fifty-eight days were spent from\r\nshearing the pi",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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