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    "wlbNpdidWellbore" : 871,
    "wlbName" : "6407/9-6",
    "wlbHistory" : "\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWell 6407/9-6 was drilled on the Draugen\r\nField in the Haltenbanken area off shore Mid Norway. The target was the Rogn\r\nSandstone Formation of the Late Jurassic. The objectives were to identify the\r\nwestern edge of the Rogn\u003c/p\u003e\r\n\r\n\u003cp\u003eFormation, to establish the reservoir\r\nproperties and development of the basal shale, to evaluate the water injection\r\npotential in oil-bearing sand, and to calibrate the seismic velocity.\u003c/p\u003e\r\n\r\n\u003cp\u003e\u003cb\u003eOperations and results\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eAppraisal well 6407/9-6 was spudded with\r\nthe semi-submersible installation Borgny Dolphin 2 January 1986 and drilled to\r\nTD at 1800 m in the Early Jurassic Ror Formation. Drilling proceeded without\r\nsignificant problems. The well was drilled with seawater and bentonite down\r\nto807 m, with KCl/polymer mud from 807 m to 1603 m, and with chalk mud from\r\n1603 m to TD.\u003c/p\u003e\r\n\r\n\u003cp\u003eThe Rogn Formation was encountered\r\noil-bearing from the top at 1642.5 m (1617.5 m SS) down to the base at 1660 m\r\n(1633.5 m SS). Average reservoir quality over this 17.5 m interval was very\r\ngood, with calculated hydrocarbon saturation of 79 % and an average porosity of\r\n31 %. Core permeabilities in the oil-bearing interval typically ranged between\r\n1 and 10 Darcy. The underlying Fangst Group was interpreted as fully water\r\nbearing below 1671 m (1646 m SS), however low hydrocarbon saturations were\r\ncalculated in the interval 1662 m to 1671 m (1637 - 1646 m SS). These were\r\nconfirmed by the observed fluorescence in the cores over this interval and by\r\nDean-Stark fluid saturation measurements.\u003c/p\u003e\r\n\r\n\u003cp\u003eFour cores were cut in the interval 1646\r\n- 1690.2 m. An FMT survey gave the same reservoir oil and water gradients as in\r\nthe other wells on Draugen, and it was found that the Rogn Formation and the\r\nFangst Group belong to the same pressure regime. One FMT fluid sample was taken\r\nat 1652.5 m in the Rogn Formation. After the well was plugged an intermittent\r\nstream of gas bubbles was observed leaking from the wellhead. Analysis of a\r\nsample of the gas s",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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