{
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  "LayerId" : 254,
  "LayerName" : "Wellbore - History",
  "id" : "822",
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    "wlbNpdidWellbore" : 1987,
    "wlbName" : "7316/5-1",
    "wlbHistory" : "\r\n\r\n\r\n\r\n\r\n\r\n\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWildcat well 7316/5-1 is located in the\r\nVestbakken Volcanic Province of Bjørnøya West area. The well is located about\r\n150 km south Southwest of Bjørnøya, and about 150 km North-west of well\r\n7219/9-1 which was used for correlation purposes.\u003c/p\u003e\r\n\r\n\u003cp\u003eThe Primary objective of the well was the\r\npotential of Tertiary prospects at lower Oligocene and upper Eocene levels. A\r\nsecondary objective was to undertake a sampling and coring programme to provide\r\nimproved stratigraphical control in the area.\u003c/p\u003e\r\n\r\n\u003cp\u003e\u003cb\u003eOperations and results\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWell 7316/5-1 was spudded with the semi\r\nsubmersible installation Polar Pioneer 21 July 1992 and drilled to TD at 4027 m\r\nin the Late Cretaceous Nygrunnen Group. The first hole was drilled to 906 m\r\nwhere it had to be plugged and abandoned due to gas influx and lost\r\ncirculation. The rig was moved 43.4 m and the well was re-spudded on 5 August.\r\nOn the second attempt, an 8-1/2" pilot hole was drilled to 613 m. A\r\ndrilling break with associated gas production was observed at 606 m and a cement\r\nplug was set over the interval 540 m to 597 m. The well was drilled with spud\r\nmud down to 921 m, with KCl / PHPA polymer mud from 921 m to 3800 m. From 3800\r\nm to TD KCl was allowed to deplete naturally and the system was slowly\r\nconverted to a higher temperature stable mud.\u003c/p\u003e\r\n\r\n\u003cp\u003eThe Uppermost Sandstone of the Eocene\r\nSotbakken Group B2 Member was encountered from 1340 m to 1383 m, and was\r\nconsidered to be gas bearing over the interval 1340 -1358.5 m. From a gross\r\nthickness of 43.0 m, a total net pay thickness of 9.75 m was calculated, giving\r\na net/gross ratio of 0.23. Average porosity of 28.2% and average Sw of 35.9%\r\nwas computed in the pay zone. A second sandstone was encountered from 1442 m to\r\n1469 m in the Sotbakken Group B2 Member. Gross thickness of this Sand was 27.0\r\nm, with average porosity of 32,1 %. It proved to be entirely water wet.\u003c/p\u003e\r\n\r\n\u003cp\u003eNumerous igneous intrusions were\r\npenetrated below 2976 m (Middle to Earl",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
}