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    "wlbNpdidWellbore" : 479,
    "wlbName" : "7121/5-1",
    "wlbHistory" : "\r\n\r\n\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWildcat well 7121/5-1 is located on the\r\neastern part of the Snøhvit Field. It was drilled about 75 m down flank on the\r\nAlpha-structure in the block. The Snøhvit structure consists of an east-west\r\nrunning horst and a rotated normal faulted block. The main objective in the\r\nwell was to test possible reservoir rocks of Jurassic/Triassic age as seen in\r\nneighbouring wells. \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 7121/5-1 was spudded with the\r\nsemi-submersible installation West Vanguard on 7 June 1985 and drilled to TD at\r\n3200 m. The rig was shut down from 16 June to 30 June due to a strike.\r\nOtherwise drilling proceeded without significant problems. The well was drilled\r\nwith spud mud down to 865 m, with a gypsum/polymer mud from 865 m to 1925 m, and\r\nwith polymer mud from 1925 m to TD.\u003c/p\u003e\r\n\r\n\u003cp\u003eTop reservoir came in at 2369 m with\r\nhydrocarbons. From RFT pressure measurements the gas/oil contact was found at\r\n2427.5 m and the oil/water contact at 2442 m. Logs displayed sands with\r\npossible hydrocarbons in Triassic sandstones, but increasing shale down hole\r\nreduced porosity/permeability and DST test confirmed a tight formation.\r\nGeochemical analyses showed immature rocks until 2250 m and marginal to\r\nsignificant maturity in Triassic/Jurassic rocks respectively. Nine cores were\r\ncut in the interval 2365 m to 2523 m in the Stø, Nordmela and Tubåen Formations.\r\nOne core was cut from 3088 m to 3109 m in the Triassic Snadd Formation. Four\r\nRFT segregated samples were taken in the upper part of the Stø and Nordmela Formations\r\nfrom 2370 m to 2434 m, one in the Tubåen Formation at 2507 m, and one at 2802.7\r\nm in the Snadd Formation. A small amount of condensate in the sample from 2370\r\nm was the only reported liquid hydrocarbons from the RFT samples. Otherwise gas\r\nwas recovered in the samples from 2424 m and 2370 m, while the sample from 2507\r\nrecovered mainly water/mud filtrate and minor gas. The sample from 2802.7 m\r\ncontained only minor amounts of mud filtrate and no",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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