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  "LayerId" : 254,
  "LayerName" : "Wellbore - History",
  "id" : "899",
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    "wlbNpdidWellbore" : 2455,
    "wlbName" : "33/9-18 A",
    "wlbHistory" : "\u003cb\u003eGeneral\u003c/b\u003e\r\n\r\n\u003cp\u003eWell 33/9-18 A was drilled to a structure\r\nsituated east of the Statfjord Field and south-west of the Tordis Field. The\r\nmain objective of well 33/9-18 A was to test the lithology of a strong seismic\r\namplitude within the same prospect as drilled in well 33/9-18. Well 33/9-18 A\r\nis a sidetrack from well 33/9-18.\u003c/p\u003e\r\n\r\n\u003cb\u003eOperations and results\u003c/b\u003e\r\n\r\n\u003cp\u003eExploration well 33/9-18 A was spudded on\r\n21 December 1994 with the semi-submersible installation Deepsea Bergen and\r\ndrilled from kick-off at 1974 m to TD at 3597 m in the Late Jurassic Draupne\r\nFormation. The 12 1/4" hole section was drilled with KC1/PAC POLYMER and\r\nKCl mud system to prevent bit balling. No shallow gas was recorded.\u003c/p\u003e\r\n\r\n\u003cp\u003eParts of the 12 1/4" section have\r\nanomalous resistivity data. The MWD data records from 3070 m to TD are missing,\r\ndue to washout, lost signal, stuck pipe and MWD tool lost in hole. No wireline\r\nlogging was performed. 1 core was cut in the Draupne Formation the interval\r\n3397-3404.5 m. No fluid samples were collected. Bit balling was observed\r\nseveral times and a lot of pills were pumped to prevent balling, but minor\r\neffects were observed. Dyno-CC-115 (soap) pills showed best results. Drilling\r\nfrom 3145 m to 3397 m had to stop after 49 m due to bad weather. Drilling\r\ncontinued after 7 days stop and the flow rate was increased to maintain a\r\npressure of 280 bar. At TD the actual pressure was nearly 100 bar less than the\r\n"theoretical" pressure. This pressure drop was caused by wash out\r\nbetween two drill collars. Got differential stuck at 3512 m when pulling out of\r\nthe hole. Cut the string at 3382 m to get free. Extra cost related to logistics\r\nis estimated to approximately 3.3 mill. NOK. The well was plugged and abandoned\r\nafter being stuck for 83.5 hrs.\u003c/p\u003e\r\n\r\n\u003cp\u003eThe well has been interpreted to penetrate\r\nlarge slump/slide blocks consisting of the Brent Group, the Dunlin Group and\r\nthe Statfjord Formation which are deposited within the Draupne Formation. The\r\nstrong seismic ",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
}