{
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      "title" : "The collection document"
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      "title" : "This document as JSON"
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  "LayerId" : 254,
  "LayerName" : "Wellbore - History",
  "id" : "720",
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    "wlbNpdidWellbore" : 1613,
    "wlbName" : "2/7-24",
    "wlbHistory" : "\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cb\u003e\u003cspan lang=EN-GB\u003eGeneral\u003c/span\u003e\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eWell 2/7-24 was drilled on the west\r\nValhall Prospect, a Late Jurassic structure located in the Feda Graben on the\r\nwest side of the Central Trough near the Skrubbe Fault. The main objective was\r\nthe Eldfisk Formation sandstones, a mass flow deposit located on the east side\r\nof the fault. A secondary objective was sandstones associated with a seismic\r\nhorizon called the Intra Volgian Marker. \u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cb\u003e\u003cspan lang=EN-GB\u003eOperations and results\u003c/span\u003e\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eWildcat well 2/7-24 was spudded by the\r\nsemi submersible rig Ross Isle 7 November 1990 and drilled to TD at 5023 in the\r\nLate Jurassic Farsund Formation. No shallow gas was encountered in this well. At\r\nca 3050 m, in the 5 7/8" hole section, the inclination started to increase\r\nto a maximum of 20 deg where after the inclination decreased to 12,5 deg at TD.\r\nThe well was hampered by bad weather, malfunction of BOP, hole problems with\r\nloss of mud, and problems with running logging equipment properly. The well was\r\ndrilled with sea water and hi-vis pills down to 465 m, with ester-based Petrofree\r\nmud from 465 m to 3042 m, and with oil based mud from 3042 m to 3388 m. Below\r\n3388 m the mud was switched from oil based to water based in an effort to\r\nreduce the mud losses. Water based mud was used down to TD.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eThe base Cretaceous unconformity was\r\nencountered at 3195 m. The well penetrated 122 m of Mandal Formation and\r\ncontinued through 1706 m of Farsund Formation without reaching its base. Hence an\r\n1828 m thick Late Jurassic section was penetrated, a record at the time of\r\ndrilling. The Late Jurassic lithology was primarily mudstone with subordinate\r\namounts of thinly bedded sandstone and limestone. The primary objective was\r\nencountered approximately at 4069 m, 174 m higher than prognosed. No reservoir\r\nquality clastic mass flow dep",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
}