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    "wlbNpdidWellbore" : 466,
    "wlbName" : "31/6-8",
    "wlbHistory" : "\r\n\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eAppraisal well 31/6-8 was drilled in the\r\nsouth-west corner of the Troll East gas province, 50 m due north of well\r\n31/6-7, which was junked and abandoned for technical reasons. The main\r\nobjectives were to determine the lateral extent of the reservoir, to determine\r\nthe fluid contacts in the Sognefjord Formation, and to obtain the best possible\r\nseismic correlation within the reservoir from well 31/6-1. In addition, an\r\nelaborate testing program was planned to obtain a number of reservoir\r\nengineering parameters.\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 31/6-8 was spudded with the\r\nsemi-submersible installation Treasure Seeker on 14 April 1985 and drilled to\r\nTD at Drilling the well proceeded without significant problems. The interval\r\ndown to setting depth for 20" casing was not logged, as this interval was\r\nconsidered covered by logs from well 31/6-7. The well was drilled with spud mud\r\ndown to 700 m, with KCl Polymer mud from 700 m to 1465 m, and with "drill\r\nin fluid" (NaCl, polymers, and CaCO3) from 1465 m to TD. An 8 m3\r\nImcospot/Pipelax pill was spotted at 2054 m to free the pipe, which was stuck. \u003c/p\u003e\r\n\r\n\u003cp\u003eThe Sognefjord Formation (1507-1661 m)\r\nwas found gas bearing from 1507 m to 1573.5 m and oil bearing from 1573.5 to\r\n1578.5 m where the oil/water contact was found. The oil zone was determined\r\nfrom petrophysical evaluation, core plug saturations and segregated sample\r\nrecoveries. The hydrocarbon-bearing reservoir consisted of predominantly very\r\nfine to fine grained sandstones with some interbedded siltstones. The gross\r\nhydrocarbon column was 71.5 m and the net pay calculated to 67 m with an\r\naverage porosity of 33% and average water saturation of 16.2 %. No hydrocarbon\r\nindications were recorded above 1507 m or below 1579 m.\u003c/p\u003e\r\n\r\n\u003cp\u003eTwelve cores were cut in the Late to Middle\r\nJurassic Sognefjord and Heather Formations from 1489 m to 1700 m (148 m total\r\nrecovery). FMT segregated samples were taken at 1573.2 m (0.7 Sm3 gas, 0.5 l\r\nwater/",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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