{
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  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 414,
    "wlbName" : "33/9-9",
    "wlbHistory" : "\r\n\r\n\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 33/9-9 was drilled in the northern part\r\nof the Statfjord field, about 1.6 km southeast of 33/9-3 well on the Tampen\r\nSpur in the northern North Sea. The objectives were to provide structural and\r\nstratigraphic control on the Brent reservoirs, and to provide stratigraphic\r\ncontrol and to establish an oil/water contact for the Statfjord reservoir.\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 33/9-9 was spudded with\r\nthe semi-submersible installation Borgny Dolphin on 27 July 1977 and drilled to\r\nTD at 3100 m in Late Triassic sediments in the Statfjord Formation. The well\r\nwas drilled with seawater down to 486 m and with a seawater/lignosulphonate mud\r\nsystem from 486 m to 1993 m. At 1993 m, TD in the 17 1/2" section, the\r\nhole was displaced to a freshwater/Lignosulphonate mud system. At the same\r\npoint diesel was added to free the 13 3/8" casing which had become\r\ndifferentially stuck. After that the mud contained initially 5% diesel\r\ndecreasing to traces of diesel at to 2489 m. From 2489 m to final TD the\r\nfreshwater/Lignosulphonate mud system was without measurable diesel.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eNo hydrocarbon shows were reported above\r\nthe Brent Group. The Brent Group was found at 2413 m, 77.5 m deeper than\r\nprognosed 44.0 m thinner than anticipated in comparison to 33/9-3. Good oil\r\nshows were encountered at the top of the Brent Formation and continued\r\nthroughout the reservoir down to top Dunlin Group at 2504 m. The entire Brent Group\r\nwas oil-filled and it was above the field oil/water contact of 2609.1 m (2584.1\r\nMSL). Log calculations showed that of the 87.0 m of gross oil section 84.6 m was\r\nnet sand with 27.5% average porosity and 13.1% average water saturation. The\r\nDunlin Group came in at 2504 m and log interpretation indicated a 23.2 m gross oil\r\nbea",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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