{
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  "LayerId" : 254,
  "LayerName" : "Wellbore - History",
  "id" : "626",
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    "OBJECTID" : 626,
    "wlbNpdidWellbore" : 1279,
    "wlbName" : "25/1-7 R2",
    "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 25/1-7 was drilled on the main Frigg\r\nstructure close to the UK border. The Frigg Field was discovered by well 25/1-1\r\nin 1971. Production from the field started in 1977. A main objective of well\r\n25/1-7 was to establish a reference monitoring station for the production of\r\ngas from the Frigg Field. The objective of the re-entry 25/1-7 R2 was to record\r\nthe fluid contacts. \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\u003eSemi-submersible installation West\r\nVanguard arrived the 25/1-7 location on 3 May 1988. Three days were spent on\r\nrepairing damage on the ROV and clearing off fishing net that was entangled in\r\na rail nearby the well head. Appraisal well 25/1-7 R2 was connected and\r\nre-entered on 7 May 1988.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eThe well was logged (2050 - 1910 m) through\r\ncasing with a Thermal Neutron Decay (TDT) log to determine the fluid contacts. The\r\ncontacts found were: base of gas at 1925.4 m MSL, and top of highest water at 1930.2\r\nMSL. No oil leg was observed. From this it was concluded: 1) the gas liquid\r\ncontact has risen 1.8-3.6 m since 14 February 1987, and 22.6 m since pre-production\r\nlevel (1948.0 m MSL reference). This, compared with 11 m rise in the period 19\r\nApril 1985 to 14 February 1987, shows that the water rise is temporarily\r\nblocked by shale barriers; 2) The vertical sweep efficiency by water is 100%,\r\nwhich means that all gas-filled sands behind the front are swept.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eThe well was suspended on 10 May 1988 as\r\na gas appraisal well. \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\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eNo drill stem test was performed.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\r\n",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
}