{
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  "LayerId" : 254,
  "LayerName" : "Wellbore - History",
  "id" : "543",
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    "OBJECTID" : 543,
    "wlbNpdidWellbore" : 894,
    "wlbName" : "30/6-17 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 30/6-17 A is a sidetrack to well\r\n30/6-17 R on the western side of the Oseberg Field. Well 30/6-17 R did not\r\npenetrate the Statfjord Formation in a high structural position as planned. The\r\nsidetrack was drilled to fulfil the objective. Secondary objectives were to\r\nappraise the Cook Formation discovery and the gas sands around BCU found in\r\n30/6-17 R. Finally, a minifracture test would be conducted to obtain\r\nminimum-horizontal-stress data that could improve drilling efficiency in Eocene\r\nclays in the Oseberg area. Prognosed depth of the well was 3532 m (2690 m TVD),\r\n50 m into the Statfjord 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 30/6-17 was re-entered with the semi-submersible\r\ninstallation Treasure Hunter on 4 February 1986. Sidetrack 30/6-17 A was kicked\r\noff due west from below the 13 3/8" casing, with kick off point at 1633 and\r\ndrilled to TD at 2686 m (2528 m TVD) in the Early Jurassic Statfjord Formation.\r\nDrilling proceeded without significant problems. It was drilled with KCl/polymer\r\nmud from kick off to 2335 m and with NaCl/polymer mud from 2335 m to TD.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eThe well encountered a gas bearing Cook\r\nFormation while the Statfjord Formation was found water bearing. Hydrocarbon\r\nshows seen in Tertiary and Cretaceous limestones similar to in 30/6-17 R, and also\r\nin a ca 5 meter thick sandstone bed associated with the Base Cretaceous\r\nUnconformity. The Cook Formation (2460 - 2488 m, 2357.5-2379 m TVD) is\r\ndeveloped as an overall coarsening upward sequence. The grain size is fine to\r\nmedium at the upper part, becoming very fine to fine with increasing silt\r\ncontent downwards. The whole of the Cook Formation was found gas bearing with a\r\nnet pay of 27.9 m. No oil/gas contact was thus seen. The average porosity is\r\n24.1% and the average",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
}