{
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  "LayerId" : 254,
  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 297,
    "wlbName" : "7/12-3 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 7/12-3 A is a geological sidetrack\r\nto 7/12-3 on the western flank of the 7/12-2 Ula discovery in the North Sea. The\r\nprimary objective was to establish the oil-water level in the Ula structure. \u00A0\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eThe well is type well for the Mandal\r\nFormation.\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\u003eOn 4 June 1977 appraisal well 7/12-3 A was\r\nkicked off from below the 13 3/8” casing shoe in well 7/12-3 at a depth of 1720.\r\nThe semi-submersible installation Norskald drilled the well to TD at 4191 m\r\n(4011 m TVD) in the Permian Zechstein Group. \u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eWell 7/12-3A penetrated the reservoir at\r\n3638.5 (3506.8 m TVD). The cores showed oil staining, cut and fluorescence.\r\nWire line logs and testing showed this to be immovable oil, and indicated an\r\noil water transition zone to a depth of 3693.5. (3555.3 m TVD). One hundred and\r\neighty-nine meters of Ula Formation reservoir were encountered representing a\r\ntrue thickness of 168.9 m, and a net to gross ratio of 0.83 assuming a 10%\r\nporosity cut off on the computer-processed log.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eSeven full hole cores were cut from 3642.0\r\nto 3730.0 m. RFT fluid samples were taken at 3675.5 m (salt water and mud\r\nfiltrate) and 3688.5 m (salt water with traces of gas and oil/oil-water\r\nemulsion).\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eThe well was permanently abandoned on 6\r\nSeptember 1977 as a dry well with shows.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cb\u003e\u003cspan lang=EN-GB\u003eTesting\u003c/span\u003e\u003c/b\u003e\u003cspan lang=EN-GB\u003e \u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eDST 1 tested the interval 3771.0 to\r\n3715.5m. The test flowed 192 m3 saline formation water /day through a 32/64\r\nchoke. The DST temperature was 146.7 °C.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyTe",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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