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  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 1055,
    "wlbName" : "6507/11-4",
    "wlbHistory" : "\r\n\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWell 6507/11-4 is located ca 3.5 km north-north\r\nwest of the Midgard Field on the Halten Terrace. The objective was to test the\r\nhydrocarbon potential in Jurassic sandstones in a rotated north-south trending\r\nfault block. Shallow gas was warned at the following levels: 470-532/539- 601-\r\nand 671 m. TD was planned at 2950 m.\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 6507/11-4 was spudded by the\r\nsemi-submersible installation Treasure Saga on 16 May 1987, and drilled to TD\r\nat 3045 m in the Early Jurassic Aldra Formation (Tilje Formation). Due to\r\nexcessive deviation during the first 13 m, the TGB was pulled and moved 10 m\r\ntowards east where the well was re-spudded on May 17. Otherwise, drilling\r\nproceeded without significant problems. No shallow gas was encountered at the warned\r\nlevels. The well was drilled with seawater and hi-vis mud down to 817 m, with\r\ngypsum / polymer mud from 817 m to 2655 m, and the remaining 8 1/2"\r\nsection from 2655 m to TD with gel / polymer mud.\u003c/p\u003e\r\n\r\n\u003cp\u003eThe argillaceous Grip Group (Viking\r\nGroup) was encountered at 2530 m, and the sandy Tomma Formation (Fangst Group)\r\nat 2676.5 m RKB. The latter consisted of two sandstone units (Garn and Ile\r\nFormations) separated by a more argillaceous unit (Not Formation). The gross\r\nsand thickness in the two units was 174 m and the porosity was good. The\r\ncalculated average values of log porosity and the net to gross ratio for the Garn\r\nFormation was 24.6% and 0.96 respectively. The corresponding figures for the Ile\r\nFormation were 22.1% and 0.74. The Leka Formation (Ror Formation) consisted mainly\r\nof claystone, while claystone and sandstone were alternating in the Aldra\r\nFormation (Tilje Formation). Sporadic oil fluorescence were observed in\r\nlamellas of silty sandstones in the Late Cretaceous at 2220 m, 2265 m, and 2315\r\nm. No shows were observed in the Jurassic sandstone units. Post-well organic\r\ngeochemical analysis did not confirm the shows in Late Cretaceous, but revealed\r\na possible ",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
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