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  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 1705,
    "wlbName" : "30/9-11 A",
    "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 30/9-11 A was drilled as a sidetrack\r\nto well 30/9-11 on the J-structure on the Oseberg Sør field in the North Sea.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eThe vertical 30/9-11 well drilled a dry\r\nBrent group in J-East segment. The sidetrack targeted the J-Central segment and\r\nshould penetrate top of the Brent Group in a down flank position in order to\r\nconfirm deep oil filling of the J-Central segment, where oil previously had\r\nbeen discovered by well 30/9-9. The primary target was the Brent Group.\r\nSecondary target was the Cook Formation.\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\u003eWell 30/9-11 A was kicked off from 920 m\r\nin 30/9-11 on 20 November 1990. The well was drilled with the semi-submersible\r\ninstallation Vildkat to TD at 3002 m (2735 m TVD) in Early Jurassic sediments\r\nof the Statfjord Group. Apart from some tight hole problems and close to seven\r\ndays wait on weather operations proceeded without significant problems. The\r\nwell was drilled with KCl/polymer mud from kick-off to TD.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eTop Viking Group, Heather Formation was\r\nencountered at 2513 m and top Brent Group, Ness Formation was encountered at\r\n2553 m. The Ness Formation was water bearing, however moderate oil shows with\r\nstrong petroleum odour was described on cores from top off the Ness Formation\r\ndown to 2570 m. These shows were confirmed by relatively high organic\r\ngeochemical extract yields with oil-mature biomarkers. Poor shows were\r\ndescribed also in Shetland Group limestone from 2455 to 2457 m and in Heather\r\nFormation claystone from 2517 to 2520 m. Otherwise there were no indications of\r\nhydrocarbons in the well.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eThree cores were cut in from 2545 to 2582\r\nm in the Heather, Tarbert, and Ness Formation. A fourth core was cut fr",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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}