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  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 99,
    "wlbName" : "7120/12-4",
    "wlbHistory" : "\r\n\r\n\r\n\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWildcat well 7120/12-4 is located on the\r\nnorthern margin of the Finmark Platform ca 9 km south of the 7120/12-2 gas\r\ndiscovery. The primary objective of the well was to test a sandstone reservoir\r\nof Late Permian age on the platform area. The reservoir prospect was seen as\r\nmerging of two shale/limestone units separated by the reservoir sandstone.\r\nThese shale units were seen on the seismic as the "platform" event\r\nand the "sub crop" event at 1160 ms and 1260 ms respectively. The sub\r\ncrop event was interpreted as a carbonate shelf edge and the reservoir as being\r\ncomposed of shallow marine sandstones. The cap rock was the massive overlying\r\nTriassic shale and the trap was sourced by migration from mature Late Triassic\r\nand Permian shales in the Hammerfest basin. Basement was prognosed at 2430 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\u003eWell 7120/12-4 was spudded with the\r\nsemi-submersible installation Treasure Scout on 18 February 1984 and drilled to\r\nTD at 2199 m in the Late Carboniferous Ugle Formation. No significant problems\r\noccurred during operations. The well was drilled with seawater and hi-vis pills\r\ndown to 666 m and with KCl/polymer/gypsum mud from 666 m to TD.\u003c/p\u003e\r\n\r\n\u003cp\u003eThe well penetrated an interval of\r\nQuaternary to Tertiary age sediments, which directly overlay rocks of Middle to\r\nLate Triassic age (Snadd Formation) at 435 m. A Late Permian succession was\r\npenetrated from 1366 m to 2118 m and consisted of alternating beds of\r\nclaystone/siltstone/sandstone (Ørret Formation) and cherty limestone (Røye\r\nFormation). The "platform" event was penetrated at 1469 m and\r\ncorrelate with a 33 m thick Røye sequence. The prognosed reservoir was\r\nencountered at 1502 m and was composed of fine to occasionally very\r\ncoarse-grained sandstone belonging to the Ørret Formation. The reservoir was\r\nwater bearing with a gross interval of 56 m and net sand was 55 m. Average\r\ncalculated porosity was 18 %. The sub crop event was a second Røye sequen",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
}