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    "wlbName" : "31/3-2",
    "wlbHistory" : "\r\n\r\n\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWell 31/3-2 was drilled immediately to\r\nthe southeast of a fault that was interpreted as a boundary fault between Troll\r\nWest and Troll East. The main objectives of the appraisal well 31/3-2 were to\r\ndetermine if hydrocarbons were present on the downthrown south side of the\r\nfault, to determine the contacts, and to determine the degree of communication\r\nacross the fault plane. A test would be performed in the case of moveable\r\nhydrocarbons, in order to observe boundary effects where the pay zone is narrow\r\nand thin. The well was planned to reach total depth in the Early Jurassic Drake\r\nFormation at 2050 m if drilling through the "boundary fault". In the\r\ncase of drilling entirely within the hanging-wall block the total depth was\r\nestimated to 2130 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 31/3-2 was spudded with the\r\nsemi-submersible installation Treasure Seeker on 5 March 1984 and drilled to TD\r\nat 2090 m in claystones of the Early Jurassic Drake Formation. No significant\r\ntechnical problems occurred during drilling and testing. The well was drilled\r\nwith pre-hydrated gel/seawater with sweeps of high viscous mud down to 629 m\r\nand with KCl/polymer mud from 629 m to TD.\u003c/p\u003e\r\n\r\n\u003cp\u003eThe Sognefjord Formation (1567 - 1706 m)\r\nwas found oil bearing down to 1578.5 m where the oil/water contact was\r\nestablished. The oil-bearing reservoir consisted of very fine to very\r\ncoarse-grained sandstones. They are friable to loose with only traces of\r\nsiliceous or calcareous cement. The total net sand in the Sognefjord Formation\r\nwas calculated to 132 m out of 139 m gross thickness, giving a net/gross ratio\r\nof 0.95 and an average porosity of 26.6%. A thin (0.5 m) gas cap could be\r\npresent on top of the oil column. This was identified from LDT/CNL logs and was\r\nalso consistent with the GOR development during the test, but was not confirmed\r\nby RFT data. There were no oil shows above the Sognefjord Formation, and no oil\r\nshows below1595 m, and the Middle to Early Jurassic sa",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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