{
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  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 218,
    "wlbName" : "15/9-7",
    "wlbHistory" : "\u003chtml\u003e\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 15/9-7 was drilled as an appraisal\r\nwell on the south part of the Sleipner Vest Field in the North Sea. The primary\r\nobjective was to test for hydrocarbons in Callovian age sandstones in the\r\nEpsilon structure.\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 15/9-7 was spudded with\r\nthe semi-submersible installation Nordraug on 26 December 1980 and drilled to\r\nTD at 3776 m in the Middle Jurassic Sleipner Formation. A total of 20 days was\r\nspent on waiting on weather. The phase of running BOP after cemented 20"\r\ncasing took 15 days due to several broken guide wires combined with bad\r\nweather. The well was drilled with spud mud down to 465 m, with gypsum/polymer\r\nmud from 465 m to 2823 m, and with gel/lignosulphonate/Drispac mud from 2823 m\r\nto TD. \u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eThe primary target Hugin Formation was\r\npenetrated at 3519 m and proved to hold gas and condensate down to a true gas/water\r\ncontact at 3673 m based on RFT gas gradients. The gross reservoir thickness was\r\n185 m (3519 to 3704 m) with a net pay of 83 m with 18% porosity and 12 % water\r\nsaturation. There were no oil shows above top Hugin reservoir level. Oil shows\r\nwere described on the cores from the reservoir and on cuttings down to 3677 m.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eA total of 156 m core was recovered in 12\r\ncores from the interval 3516 to 3671 m. The core-log depth shift was\r\nsignificant for all cores: from +6.0 to +9.1 meter, the largest shifts are for\r\nthe deepest cores. Segregated RFT fluid samples were taken at 3560 m (gas, mud\r\nfiltrate and condensate), 3603 m (gas, mud filtrate and condensate), 3658.5 m\r\n(gas, mud filtrate and condensate +dark oil emulsion), 3687 m (mud filtrate,\r\nformation water and minor gas), and 3672.2 m (mud filtrate and water). \u003c/span\u003e\u003c/p\u003e\r\n\r",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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