{
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  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 28,
    "wlbName" : "7/8-3",
    "wlbHistory" : "\r\n\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWell 7/8-3 is located in the North Sea, north of the Mime field on the margin of the Cod Terrace. The primary objective\r\nof 7/8-3 was to explore the hydrocarbon potential of the Late Jurassic\r\nsandstones. Secondary objectives were to explore the Cretaceous Chalk and the\r\nTriassic sandstones. Planned TD was at 4275 m in Permian salt.\u003c/p\u003e\r\n\r\n\u003cp\u003e\u003cb\u003eOperations and results\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWildcat well 7/8-3 was spudded with the\r\nsemi-submersible installation Borgny Dolphin on 12 September 1983 and drilled\r\nto TD at 4320 m in the Late Permian Zechstein Group. While running 13 3/8"\r\ncasing this got stuck and had to be pulled out of the hole. The hole was\r\ncleaned and new casing was set without further complications. Otherwise no\r\nsignificant problems were encountered during drilling. The well was drilled\r\nwith spud mud down to 199 m and with KCl polymer mud from 199 m to TD.\u003c/p\u003e\r\n\r\n\u003cp\u003eThe Cretaceous Chalk was encountered at a\r\ndepth of 3024 m, the Late Jurassic Ula Formation at 3724 m, and the Triassic at\r\n3767 m. The Ula Formation sandstones were hydrocarbon bearing within a 43.5 m\r\ngross sand interval. No oil/water contact was encountered. Oil shows were\r\nrecorded in shales and porous sections from 3699 m to 3751 m.\u003c/p\u003e\r\n\r\n\u003cp\u003eFour cores were cut in the interval 3731\r\nm to 3773 m, three in the Upper Jurassic Ula Formation and one into Upper\r\nTriassic sandstones. A RFT fluid sample from the Triassic section at 4049.5 m\r\nrecovered only mud filtrate.\u003c/p\u003e\r\n\r\n\u003cp\u003eThe well was permanently abandoned on 12\r\nDecember 1983 as an oil discovery.\u003c/p\u003e\r\n\r\n\u003cp\u003e\u003cb\u003eTesting\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eTwo DST's were performed in the Ula\r\nFormation sandstones: DST 1 from interval 3762 m to 3767 m, and DST 2 from\r\ninterval 3734.5 m to 3740.5 m. The first produced oil at a slightly declining\r\nrate during the final 5-hours flow period, the average rate being 207 Sm3/day\r\nthrough a 2" choke. The GOR was 32 Sm3/Sm3, API oil gravity was 29 deg,\r\nand gas gravity was 0.88 (air = 1). The second DST produced 70 Sm3 oil/day\r\nth",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
}