{
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  "links" : [
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  "LayerId" : 254,
  "LayerName" : "Wellbore - History",
  "id" : "874",
  "properties" : {
    "OBJECTID" : 874,
    "wlbNpdidWellbore" : 2285,
    "wlbName" : "15/12-10 S",
    "wlbHistory" : "\r\n\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\u003eThe well is positioned on the western\r\nflank of the northern segment of the Varg Field, on a horst mapped at Top\r\nSleipner level. Thick Intra Heather sandstones present in the southern and\r\neastern segments of Varg were expected also in the northern segment. Over the\r\nhorst, Draupne/Heather shales were assumed eroded so that Intra Heather\r\nsandstones were present between BCU and Top Sleipner. These two horizons could\r\nbe mapped seismically, but the extent of sandstones could not be mapped. The\r\nwell was drilled to determine the extent and thickness of the Intra Heather\r\nsandstone reservoir over the northern segment of Varg and, if oil was\r\nencountered, to determine fluid characteristics and depth to the OWC. \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 15/12-10 S was drilled\r\nfrom the S4 slot on the Varg subsea template using the semi-submersible\r\ninstallation Deepsea Bergen. It was spudded on 2 October 1996 and drilled\r\ndeviated to TD at 3550 m in the Triassic Skagerrak Formation. The deviation started\r\nat 250 m, building angle to 35 deg at 960 m and was then kept between 28 deg\r\nand 38 deg down to TD. No significant problems were encountered in the\r\noperations. The well was drilled with seawater down to 207 m, with\r\nseawater/PAC/CMC from 207 m to 1396 m, and with Ancovert oil based mud from\r\n1396 m to TD. No shallow gas was predicted and no shallow gas was found in the\r\nwell.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eDown to Top Shetland, the well was within\r\nprognosis, and penetrated the expected lithology. Below this level, the\r\nShetland limestone was thicker than expected, and Top Cromer Knoll and Base\r\nCretaceous was penetrated considerably deeper than prognosed (55 and 58 metres,\r\nrespectively). Below BCU, the well encountered Late Jurassic shales and\r\nsiltstones, and only 13 metres T",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
}