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  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 1972,
    "wlbName" : "10/7-1",
    "wlbHistory" : "\r\n\r\n\r\n\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWell 10/7-1 is located at the\r\nsoutheastern end of the Egersund Basin in the North Sea. The objective of the\r\nwell was to test the Tott prospect, a faulted anticline over a salt wall. The\r\nMiddle Jurassic Bryne formation was the primary objective. A thin Sandnes\r\nformation sandstone overlying the Bryne was interpreted to be possible at the\r\ndrilled location.\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 10/7-1 was spudded with the\r\nsemi-submersible installation Sonat Arcade Frontier on 28 June 1992 and drilled\r\nto TD at 1890 m in the Late Permian Zechstein Group. The well was drilled with\r\nseawater and gel down to 793 m and with KCl/polymer mud from 793 m to TD. \u003c/p\u003e\r\n\r\n\u003cp\u003eGood reservoir quality sandstones were\r\nencountered in both the Sandnes and Bryne formations of the Vestland group. The\r\ntop of the Sandnes formation was penetrated at 1539 m; top of the Bryne at 1632\r\nm. Total thickness of the Vestland group is 297 m. From drill cuttings, fair to\r\ngood visible porosity was observed in fine to coarse-grained sandstones\r\nthroughout the Vestland group. Reservoir quality is good, with a net sand/gross\r\nthickness ratio of 54.5% using a 12% porosity cut-off. Using the same cut-off\r\nvalue the average porosity of the reservoir sandstones in the Vestland group is\r\n23.3%. Bathonian age sediments (Bryne Formation) rested directly on Late\r\nPermian Zechstein salt at 1836 m. Occasional, spotty shows were observed in\r\ncuttings from the Sandnes and Bryne Formations. These marginal shows were\r\ninterpreted to be sourced from in-situ carbonaceous material and not as\r\nmigrated hydrocarbons. Analysis of the wire line logs and wire line pressure\r\ndata clearly indicated that the sandstones of the Vestland group were water\r\nbearing. Organic geochemical analyses showed Total Organic Carbon (TOC) from\r\n1.0 to 3.19 % and Hydrogen Index (HI) from 79 to 224 mg HC/g TOC in the Late\r\nJurassic shales, which was classified as a poor oil and gas source. Associated\r\nwith coals in the Vestland g",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
}