{
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  "LayerId" : 254,
  "LayerName" : "Wellbore - History",
  "id" : "995",
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    "OBJECTID" : 995,
    "wlbNpdidWellbore" : 3114,
    "wlbName" : "25/7-4 S",
    "wlbHistory" : "\r\n\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eBlock 25/7 is\r\nsituated in the South Viking Graben on the western side of the Utsira High, a\r\nbasement high that tilts slightly towards the east. The South Viking Graben has\r\nan asymmetrical profile bounded in the west by the Brea/Crawford Fault Zone and\r\nthe Utsira High to the east. The Jotun Field is sitting on a basement terrace\r\nstepping up to the Utsira High from the Graben area. Well 25/7-1 drilled in\r\n1986 for a Jurassic target encountered oil shows in thin ratty sands in the Paleocene\r\nHermod Formation. \u003c/p\u003e\r\n\r\n\u003cp\u003eExploration well\r\n25/7-4 S was drilled to test the 25/7 Hermod South prospect, a stratigraphic\r\ntrap comprising of channelised basin floor sandstones of the Paleocene Hermod\r\nFormation. The primary objectives of the well were to test the presence of\r\nhydrocarbons in the Hermod South prospect and to establish hydrocarbon type(s)\r\nand fluid contacts (if present). A secondary objective was to evaluate the\r\nLower Tertiary interval by ensuring that the well penetrates into the\r\nCretaceous.\u003c/p\u003e\r\n\r\n\u003cp\u003e\u003cb\u003eOperations and results\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eExploration well\r\n25/7-4 S was spudded with the semi-submersible installation "Maersk\r\nJutlander" on 2 June 1997 and drilled to a total depth of 2560 m in the\r\nLate Cretaceous Tor Formation. Operations went without problems within the AFE\r\ntime budget. The well was drilled with seawater and hi-vis pills down to 1195 m\r\nand with KCl / Glycol mud from 1195 m to TD. Good quality Hermod sands were\r\nencountered at 2018 m (1987 m TVD SS). Also the Heimdal and Ty Formation sands\r\nwere present. However, no indications of hydrocarbons were found. \u003c/p\u003e\r\n\r\n\u003cp\u003eNo conventional core\r\nwas cut in and no fluid samples were taken. The well was permanently abandoned\r\nas a dry well on 21 June 1997.\u003c/p\u003e\r\n\r\n\u003cp\u003e\u003cb\u003eTesting\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eNo drill stem test\r\nwas performed.\u003c/p\u003e\r\n",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
}