{
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  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 409,
    "wlbName" : "33/9-4",
    "wlbHistory" : "\u003cp class=MsoBodyText\u003e\u003cb\u003e\u003cspan lang=EN-GB\u003eGeneral\u003c/span\u003e\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eWell 33/9-4 was drilled on the Statfjord\r\nstructure on Tampen Spur in the northern North Sea. The primary objective was\r\nto test the northern extension of the Statfjord discovery in the Brent Group.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cb\u003e\u003cspan lang=EN-GB\u003eOperations and results\u003c/span\u003e\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eAppraisal well 33/9-4 was spudded with\r\nthe semi-submersible installation Norskald on 30 July 1975 and drilled to TD at\r\n3076 m in the Triassic Hegre Group. No significant problem was encountered in\r\nthe operations. The well was drilled with seawater and spud mud down to 488 m and\r\nwith Lignosulphonate mud from 488 m to TD.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eThe objective Brent Group was encountered\r\nat 2554.5 meters, 33.9 meters high to prognosis. Measured core porosities in\r\nthe Brent Group averaged 26 percent. Horizontal liquid permeability ranged from\r\n0.05 to 1100.5 milliDarcy and averaged 2155 milliDarcy. The Brent Group was oil\r\nfilled down to the oil-water contact at 2611.5 m. This is 2 m deeper than on\r\nthe southern part of Statfjord Field and constitute an in-well gross oil column\r\nof 57 m of which 37 m was calculated as net reservoir with 25.4% average\r\nporosity and 24.2% average water saturation. Apart from shows in the oil\r\nbearing section an oil show was described on a sidewall core at 2618 m.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eContinuous coring was carried out from\r\nwithin the overlying Middle Jurassic shales through the base of the oil/water\r\ncontact in the Brent sands, from 2547.2 to 2612.5 meters. Of the 56.7 meters\r\ncut by nine cores, 50.7 meters (89 percent) was recovered. No fluid sample was\r\ntaken on wire line.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eThe well was permanently abandoned on 17\r\nSeptember as an oil appraisal well.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cb\u003e\u003cspan lang=EN-GB\u003eTesting\u003c/span\u003e\u003c/b\u003e\u003cspan lang=EN-GB\u003e ",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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