{
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      "title" : "The collection document"
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  "LayerId" : 254,
  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 143,
    "wlbName" : "25/11-1",
    "wlbHistory" : "\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWell 25/11-1 is located on the Utsira\r\nHigh in the Northern North Sea. The objective of the well was to test the\r\nhydrocarbon potential of the sedimentary section; to investigate the lithology\r\nand sequence in this portion of the North Sea basin; and to partially fulfil\r\nEsso's drilling obligation to the Norwegian Government incurred on behalf of\r\nthe Licenses.\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 25/11-1 was spudded with the\r\nsemi-submersible installation Ocean Traveler on and drilled to TD at 2459 m in Basement\r\nrock. Actual drilling problems with the 25/11-1 were few. However, other major\r\nproblems occurred. The number 2 column of Ocean Traveler was bumped by a supply\r\nboat on 6 November and began taking water. On 18 November, 1966 the rig was towed to Stavanger for repairs. By 14 April, 1967 the rig was able to continue drilling at the 25/11-1 location. Bad weather caused a new break in the\r\ndrilling operations from 17 April to 10 May. \u003c/p\u003e\r\n\r\n\u003cp\u003eFrom the sea floor to 370 m (1213'), the\r\nhole was drilled with sea water and gel. Returns in this interval were to the\r\nsea floor. Below 370 m to total depth a sea water slurry with Bentonite,\r\nZeogel, Spersene, XP-20, Caustic Soda and 0 -12% diesel oil was used. \u003c/p\u003e\r\n\r\n\u003cp\u003eFirst show in the well was reported in\r\nthin siltstone and sandstone bands at ca1690 m. Gas and live oil were found in\r\nPaleocene clastic sediments (Balder Formation; top has been set at 1698). The\r\nrecovered cores from this interval (1726.7 to 1745.9 m) showed a predominantly\r\nshale section containing interbedded tuffaceous siltstone and sandstone. The\r\nshale bled gas throughout and developed a film of oil along fractured surfaces.\r\nThe siltstone, though tight, bled oil at the base of most beds. The sandstone,\r\nwhether 1/2 inch or three feet thick, was saturated with live oil which gave a\r\nyellow fluorescence and a streaming yellow-white or blue-white cut. Two FIT\r\ntests at 1755 and 1777 m yielded oil and gas, while a FIT at 1801.4 m recovere",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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}