{
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  "LayerId" : 254,
  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 429,
    "wlbName" : "34/10-6",
    "wlbHistory" : "\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 34/10-6 was drilled on the northern\r\npart of the Delta structure in block 34/10 in the northern North Sea. It was\r\nthe fifth well drilled on the structure. All four foregoing wells had tested\r\noil in the Brent Group. The primary objective was to test Middle Jurassic Brent\r\nGroup. Secondary objectives were sandstones of Early Jurassic age.\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 34/10-6 was spudded with\r\nthe semi-submersible installation Borgny Dolphin on 13 November 1979 and\r\ndrilled to TD at 2362 m. A total of 14.6% of the rig time was lost due to\r\nwaiting on weather. The other main causes of downtime was technical failure\r\nduring cementing of the 9 5/8" casing, followed by two squeeze jobs, repair\r\nof subsea equipment and lost circulation. The lost circulation was experienced on\r\nseveral occasions when drilling the 8 1/2" hole. The main reason for this\r\nwas that the 9 5/8" casing (and 13 3/8" casing) were set too high, causing\r\nlow formation integrity at the casing shoes. The well was drilled with spud mud\r\ndown to 308 m and with seawater/polymer from 308 m to TD.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eThe Brent Group sandstones were\r\nencountered at 2075 m, about 100 m below the OWC established in the previous\r\nwells drilled on the Delta structure. The Brent Group was 215 m thick with 145\r\nm net of good reservoir sands (average porosity = 27.8 %). The Brent Group was\r\nwater bearing. Oil shows were seen from 1580 m to 1632 m in the Balder\r\nFormation, and from 1710 m to 1812 m in the Lista Formation and top Shetland\r\nGroup, otherwise no evidence of hydrocarbons was seen in the well.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eNo conventional cores were cut. The RFT\r\ntool was run for pressure points, but no wire line fluid samples were taken.\u003c/span\u003e\u003c/p\u003e\r\n",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
}