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  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 1561,
    "wlbName" : "7120/10-2",
    "wlbHistory" : "\r\n\r\n\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eBlock 7120/10 is situated on the\r\nsouthwest margin of the Hammerfest Basin with the Tromsø Basin to the west, and\r\nthe Troms-Finnmark Platform to the south. Well 7120/10-2 was designed to drill\r\nValanginian submarine fan sandstones, where the hydrocarbon trap is formed by\r\nup dip sand pinch out to the south and west combined with structural dip to the\r\nnortheast. The reservoir was prognosed to be penetrated at 2080 m sub sea. The\r\nsource kitchen for the prospect was expected to be the Hekkingen Formation of\r\nLate Jurassic, which is good to rich source rocks and contains oil prone\r\nkerogen. Surface to 214 m subsea could contain boulders and thus cause drilling\r\nproblems. \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 7120/10-2 was spudded with\r\nthe semi-submersible installation Byford Dolphin on 20 July 1990 and drilled to\r\nTD at 2500 m in the Late Jurassic Hekkingen Formation. Three incidents delayed\r\nthe drilling for a total of 13.5 days: 1) A boulder bed in the 36" section\r\nmade it necessary to make a trip to change the BHA. The old hole could not be\r\nlocated on this wiper trip so the string was pulled to re-spud; 2) A wellhead\r\nconnector leak needed to be diagnosed and repaired; 3) Logs hung up at ledges\r\nformed when the shale/ claystone was washed out while resistant limestone were\r\nnot. As a consequence of the latter no wire line logs were obtained over the\r\ninterval 2106 m to 1935 m. This interval comprises predominantly shale but does\r\ninclude two sandstone beds (2052 m to 2059 m and 2036 m to 2038 m). The well\r\nwas drilled with seawater down to 523 m and with lignosulphonate/seawater/gel\r\nfrom 523 m to TD.\u003c/p\u003e\r\n\r\n\u003cp\u003eThe well penetrated the primary\r\nobjective, Valanginian sandstones, at 2125 m within the Knurr Formation. These\r\nreservoir quality rocks comprised of sandstones with minor interbedded\r\nsiltstones and shales for a thickness of 178 m down to the contact with the\r\nLate Jurassic Hekkingen Shale at 2303 m. These reservoir sands all proved water\r",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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}