{
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  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 79,
    "wlbName" : "15/9-16",
    "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 15/9-16 was drilled on the Sleipner\r\nØst discovery in the southern Viking Graben of the North Sea. The primary\r\nobjective was to delineate the hydrocarbon accumulations in the Heimdal\r\nFormation on the gamma structure. Sandstones of Jurassic/Triassic age were\r\nsecondary objectives. It was the fourth well drilled on this structure.\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 15/9-16 was spudded with\r\nthe semi-submersible installation Deepsea Saga on 28 June 1982 and drilled to\r\nTD at 3120 m, 52 m into the Permian Rotliegendes Group. The 9 5/8" casing\r\nhad a leak at 522 m. It was squeezed twice with cement before it held a reduced\r\npressure. Otherwise, no significant problem was encountered in the operations.\r\nThe well was drilled with gel/seawater spud mud down to 515 m, with\r\ngypsum/lignosulphonate mud from 515 m to 2652 m, and with a\r\nseawater/lignite/lignosulphonate mud from 2652 m to TD.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eTop Heimdal was encountered at 2378 m. It\r\ncontained gas and condensate, but was thinner than expected. Pressure data\r\nindicated a gas/water contact at 2434 m. The logs showed a sharp increase in\r\nwater saturation at 2428 m. Weak oil shows were recorded on cores between 2418\r\nm and 2427.5 m. The prognosed sandstones of Jurassic/Triassic age were not\r\npresent at this location. Fair shows were recorded on cuttings in evaporites at\r\n3014 m, at top Zechstein Group level. No shows were recorded on sidewall cores\r\nfrom the same level.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eA total of 113.5 m of core (98% recovery)\r\nwas cut in seven cores in the interval 2382 to 2498 m. cores were cut and no\r\nwire line logs were run in the well. An RFT fluid sample was taken at 2380 m\r\n(good recovery), while attempts to sample at 2411m, 2413 m, and 2426 m gave\r\npoor ",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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}