{
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  "LayerId" : 254,
  "LayerName" : "Wellbore - History",
  "id" : "815",
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    "wlbNpdidWellbore" : 1970,
    "wlbName" : "30/2-3",
    "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 30/2-2 was drilled on the Huldra\r\nField in the North Sea.\u003c/span\u003e\u003cspan lang=EN-GB\u003e \u003c/span\u003e\u003cspan lang=EN-US\u003eThe\r\nobjective was \u003c/span\u003e\u003cspan lang=EN-GB\u003eto appraise the gas/condensate discovery\r\nin the Brent Group and reduce the gas-in-place estimates for the field.\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 30/2-2 was spudded with\r\nthe semi-submersible installation Ross Isle on 11 June 1992\u00A0 and drilled to TD\r\nat 4325 m in the Early Jurassic Eiriksson Formation. A pilot hole was drilled\r\nto 520 m to check for shallow gas. No gas was detected. Drilling proceeded\r\nwithout significant problems. Tool sticking was common in the reservoir section\r\nduring logging runs. The well was drilled with seawater down to 209 m, with gel\r\nspud mud from 209 m to 1115 m, with gypsum/polymer mud from 1115 m to 2298 m,\r\nand with Ancotherm mud from 2298 m to TD.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eAlthough a well-defined Gas-Water-contact\r\nwas encountered in 30/2-3 at 3896 m, this was some 75 m shallower than the\r\npreviously deepest gas-down-to for well 30/2-2. This indicates that the Huldra\r\nField is more complex than previously thought. Good porosity and permeability\r\nwere encountered in all gas bearing intervals, reducing uncertainties regarding\r\nwell productivity. There were no shows above Brent reservoir level. Below the\r\nGWC weak shows on sandstone in the cores gradually diminished down to 3962 m\r\nwhere shows disappeared altogether.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eA total of 178.4 m core was recovered in\r\n17 cores, from 3749 m in the Heather Formation through all of the Brent Group\r\nand down to 3985 m at top Drake Formation. The core-to-log depth correction varied\r\nbetween -0.4 to +1.9 m. No wire line fluid samples were taken.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eThe",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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