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    "wlbName" : "34/7-22",
    "wlbHistory" : "\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWell 34/7-22 is located between the\r\nGullfaks and Snorre fields on Tampen Spur in the Northern North Sea. The main\r\nobjective was to prove hydrocarbons and reservoir quality of a Brent Group\r\nprospect named the STWB prospect, defined by structural closure towards east\r\nand north, dip closure towards south, combined with fault seal against the Main\r\nTordis Fault (MTF) towards west. Sands within Paleocene, Cretaceous, and Late\r\nJurassic were secondary objectives.\u003c/p\u003e\r\n\r\n\u003cp\u003e\u003cb\u003eOperations and results\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWildcat well 34/7-22 was spudded with the\r\nsemi-submersible installation West Delta on 15 August 1993 and drilled to TD at 2507 m in the Early Jurassic Drake Formation. Since possible shallow gas\r\nlevels had been predicted, a 9 7/8" pilot hole was drilled. The Nordland\r\nGroup consisted mainly of claystone except for the sandy Utsira Formation,\r\nwhich came in at 907 m. On the seismic, top Hordaland was interpreted to\r\ncoincide with a structural high which was considered to be a clay diapir. The\r\n"clay diapir" consisted, however, almost entirely of sandstone which\r\npartly belongs to the Utsira Formation and the upper part of the Hordaland\r\nGroup. The unexpected large amounts of sand caused operational problems due to\r\ninstability and the drill string got stuck at 1086 m, on 17 August. The string\r\nwas backed off and the well was re-spudded on 18 August. The casing program was\r\nre-designed to penetrate and stabilize the sandy Utsira Formation and Hordaland\r\nGroup with a weighted mud system. After re-spud, drilling commenced as planned.\r\nThe well was drilled with spud mud down to 1329 m, and with KCl mud with glycol\r\nfrom 1329 m to TD.\u003c/p\u003e\r\n\r\n\u003cp\u003eNo sand or hydrocarbons were found within\r\nthe Paleocene and Cretaceous (Campanian) intervals, but at 2178.5 m, a water wet\r\nIntra-Draupne Formation sand was penetrated. At 2184 m the Heather Formation\r\nwas encountered with a thickness of 40 m, 31m thicker than prognosed. Top\r\nreservoir, corresponding to Top Tarbert Formation, B",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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