{
  "type" : "Feature",
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  "LayerId" : 254,
  "LayerName" : "Wellbore - History",
  "id" : "54",
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    "OBJECTID" : 54,
    "wlbNpdidWellbore" : 56,
    "wlbName" : "30/6-10 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 30/6-10 A is a sidetrack to\r\nappraisal well 30/6-10 on the Alfa structure on the Oseberg Field in the North\r\nSea. The primary well found oil and gas all through the Brent Group with a\r\ngas/oil contact at 2520 m, but no oil water contact. The main objective was to further\r\ndefine the gas/oil contact and to perform drill stem tests over the reservoir. The\r\nwell was planned to penetrate the Brent reservoir approximately 300 m west of\r\nthe original hole.\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 30/6-10 A was sidetracked\r\non 2 December 1982 through a milled window in the 13 3/8" casing at 1788\r\nto 1803 m in the primary well bore. The sidetrack was drilled with the\r\nsemi-submersible installation Treasure Scout to 2665 m (2577 m TVD) in the Early\r\nJurassic Drake Formation. At 2657 m bad weather came up and caused some\r\nproblems and down time. The pipe got stuck at TD but was worked free after 32.5\r\nhrs using pipe lax, Imco spot and diesel. Otherwise the sidetrack was drilled\r\nwith 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\u003eFirst oil shows were seen in cuttings\r\nfrom limestone stringers in the Balder Formation at 2015 m. Oil shows on\r\nlimestone cuttings continued down through the Shetland Group to top Heather\r\nFormation at 2448 m. The Brent Group interval from 2480 - 2608.5 m (2429 - 2531\r\nm TVD) was found hydrocarbon bearing over the entire interval with the free\r\ngas/oil contact based on RFT pressure gradients at 2594 m (2520 m TVD) in the\r\nNess Formation. No oil/water contact was found. The net pay in the Brent Group was\r\ncalculated to be 58 m with average porosity of 24.4% and average water\r\nsaturation of 27%. The net/gross ratio in 30/6-10 A is higher than in 30/6-10\r\ndue to a better sand development in the Ness Formation. \u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=M",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
}