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    "wlbName" : "6407/9-4",
    "wlbHistory" : "\r\n\r\n\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eAppraisal well 6407/9-4 is the fourth\r\nwell on the Draugen Field. The main objective was the Late Jurassic Rogn\r\nFormation. Wells 6407/9-1, 6407/9-2 and 6407/9-3 had previously encountered under-saturated\r\n40 deg API oil in sandstones of the Late Jurassic Rogn Formation. Net oil sand\r\nthicknesses in the three previous wells were 39, 12 and 34 m, respectively.\r\nPrecise definition of the OWC in well 6407/9-1 was precluded by poor quality\r\nlithology at the base of sequence. A clearly defined oil-water contact at\r\n1638.5 m MSL was however encountered in well 6407/9-2. The purpose of this\r\nfourth well was to evaluate the reservoir quality and sand development on the north-west\r\nflank of the accumulation, and to evaluate the oil deliverability and water\r\ninjection potential of the reservoir sands.\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 6407/9-4 was spudded with the semi-submersible\r\ninstallation West Venture on 4 July 1985 and drilled to TD at 1820 m in the\r\nEarly Jurassic Tilje Formation. No significant problems were encountered while\r\ndrilling the well. The well was drilled with seawater and bentonite down to 820\r\nm, with KCl/polymer mud from 820 m to 1635 m, and with chalk mud from 1635 m to\r\nTD.\u003c/p\u003e\r\n\r\n\u003cp\u003eLight oil with low gas content was\r\ndiscovered in the Garn Formation, as the Rogn Formation proved to be only 2 m\r\nthick. The oil/water contact was found at 1672 m (1639 m MSL), the same contact\r\nthat had been established in previous wells on the Draugen Field. This\r\nindicated communication in the Rogn and Garn Formations between the wells\r\ndrilled so far on Draugen. No oil shows were recorded above the reservoir.\r\nBelow OWC oil shows continued down to 1681 m, otherwise no further oil shows\r\nwere observed. \u003c/p\u003e\r\n\r\n\u003cp\u003eFive cores were cut from 1666 m to 1711.5\r\nm in the Fangst Group. An RFT segregated fluid sample was taken at 1664.5 m in\r\nthe upper Garn Formation. \u003c/p\u003e\r\n\r\n\u003cp\u003eThe well was permanently abandoned on 10\r\nSeptember 1985 as an oil appraisal well.\u003c/p\u003e\r\n\r\n\u003cp\u003e\u003c",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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