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    "wlbNpdidWellbore" : 433,
    "wlbName" : "35/3-5",
    "wlbHistory" : "\r\n\r\n\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWell 35/3-5 is located ca 13 km south of\r\nthe Agat Discovery. The primary target of the well was sandstones of Early\r\nCretaceous age, which had been found hydrocarbon bearing in the 35/3-2 and\r\n35/3-4 wells. The well was considered a wildcat due to the uncertain\r\ncorrelation between sand bodies in the area. The secondary objective was to\r\npenetrate sandstones of Middle - Early Jurassic age, which had been found\r\nhydrocarbon bearing in 35/3-2. \u003c/p\u003e\r\n\u003cp\u003eThe well is Reference well for the Agat Formation.\u003c/p\u003e\r\n\r\n\u003cp\u003e\u003cb\u003eOperations and results\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eExploration well 35/3-5 was spudded with\r\nthe semi-submersible installation West Venture on 22 December 1981 and drilled\r\nto TD at 4114 m in Basement rocks. The well was respudded two times due to\r\nboulders. Shallow gas caused problems with cementing and caused a leak outside of\r\nthe casing. The leak was repaired and further operations were performed without\r\nany specific problems. The well was drilled with seawater and hi-vis pills down\r\nto 420 m, with seawater/gel mud from 420 m to 1046 m, with gypsum/polymer mud\r\nfrom 1046 m to 2052 m, and with lignosulphonate mud from 2052 m to TD.\u003c/p\u003e\r\n\r\n\u003cp\u003eThe Agat Formation was encountered from\r\n3219 m to 3620 m. A thin Intra Heather sandstone was penetrated from 3865 m to\r\n3874 m. A minor show was noted at the top of the Agat Formation. Minor oil\r\nshows with associated formation gas peaks were recorded in sandstones at 3547 m\r\nand 3568 m. Minor shows were recorded in siltstones below 3685 m, but these\r\nwere not associated with gas peaks. Organic geochemical analyses confirmed\r\nmigrant hydrocarbons at 3223 m in the top of the Agat Formation. Source rocks\r\nwere immature down to about 3000 m. Oil window maturity is postulated below ca\r\n3900 m. Below ca 3300 m in the well total organic carbon was found in the range\r\n1.7 % to 3 % in picked mud stone samples. Shale in a thin interval at 3286 m to\r\n3295 m was evaluated as a good/rich potential as a source rock for gas and oil\r\nwhile claystone/siltston",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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