{
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  "LayerId" : 254,
  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 507,
    "wlbName" : "30/7-6 R",
    "wlbHistory" : "\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 30/7-6 R was originally named 30/7-6\r\nPhase II by the operator group. It is a re-entry of well 30/7-6, which was\r\nsuspended at a final depth of 3711 m after taking a massive gas kick at the\r\nbase of the Heather Formation. The well is located on the East Shetland Basin\r\nin the North Sea close to the UK border. The main objective of the re-entry was\r\nEarly and Middle Jurassic sandstones. \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\u003eWildcat well 30/7-6 was re-entered with\r\nthe semi-submersible installation Treasure Seeker on 18 April 1978. The 7"\r\nliner shoe at 3707 m was drilled out with a 6" bit using 1.92 sp.gr. mud. A\r\nsmall influx of gas was encountered while drilling into the high-pressured\r\nreservoir sand at 3810 m. The gas influx was circulated out and the mud weight\r\nincreased to 1.98 sp.gr. After several circulations, the mud density was raised\r\nto 2.04 sp.gr. Two days elapsed in conditioning and stabilizing the well. Further\r\ndrilling proceeded without significant problems to TD at 4115 m in the Early Jurassic\r\nDrake Formation. The well was drilled with a fresh water gel/chromium-lignosulphonate\r\nmud system from 3707 m to TD.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eThe 30/7-6 well encountered the gas\r\ncondensate bearing sandstones of Middle Jurassic age (Tarbert Formation) at\r\n3792 m. The reservoir continued with interbeds of shales and coals down to the\r\ndeepest sandstone at 3892 m in the top of the Ness Formation. Net sandstone in\r\nthe interval is 75 m based on wire line log evaluation. No hydrocarbon-water\r\ncontact was penetrated in the well. Average porosity is calculated to 19.4% and\r\naverage water saturation to 20%. No shows were described below the hydrocarbon\r\nbearing reservoir.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eNo conventional cores were cut in the\r\nwell. RFT",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
}