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    "wlbNpdidWellbore" : 1808,
    "wlbName" : "6305/12-1",
    "wlbHistory" : "\r\n\r\n\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWell 6305/12-1 is located in the\r\nsouthwestern part of block 6305/12 in the Slørebotn Sub-basin, approximately 12\r\nkm west of the island of Vigra. The C-prospect is an easterly tilted fault\r\nblock bounded to the west by the Gossa High. The primary objective of the well\r\nwas to prove hydrocarbons in Early to Middle Jurassic sandstones. Late Triassic\r\nsandstones were secondary objectives. The well was designed to leave only\r\nnon-commercial resources up-dip with a total depth of 4300 m in rocks of\r\npresumed Late Triassic age. If the encountered stratigraphy below the base\r\nCretaceous was younger than expected, deeper drilling for stratigraphic\r\ninformation would be considered. \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 6305/12-1 was spudded with\r\nthe semi-submersible installation Transocean 8 on 29 July 1991 and drilled to\r\nTD at 4302 m in Triassic Red Beds conglomerates. No significant problems were\r\nencountered during drilling, which was completed in 55 days compared to\r\nprognosed 81 days. The well was drilled with seawater and hi-vis pills down to\r\n721 m and with KCl/polymer mud from 721 m to TD.\u003c/p\u003e\r\n\r\n\u003cp\u003eThe Egga Informal Sand Unit was\r\nencountered at 1804 m. It contained ca 145 m net sand with 19.7% average\r\nporosity. Thinly developed sandstones were encountered from 3260 m in the Late\r\nCretaceous Lange Formation and down through to base Early Cretaceous at 3685 m.\r\nAt 3685 m there was a hiatus from Late Albian (Base Lange Formation) to\r\nBathonian, hence the Late Jurassic source rocks were not present in the well. The\r\nMiddle Jurassic unit exhibited interbedded thin sandstones, coals and\r\nclaystones. No shows were recorded while drilling the Egga sandstone, but\r\npost-well organic geochemical extraction proved a weak show at 1810 m. The logs\r\nshowed a water wet Egga reservoir. The Lange sandstones generally displayed\r\npoor direct and cut fluorescences while being drilled, and proved later to be\r\noil-bearing, though tight, in subsequent RFT runs. Moveable oil ",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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