{
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  "LayerId" : 254,
  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 39,
    "wlbName" : "30/6-6",
    "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 30/6-6 was drilled on the 30/6 Alpha\r\nstructure (Oseberg fault block) in the North Sea, as the fifth well drilled on\r\nthis structure. The well was drilled down-dip of 30/6-3 and 30/6-4. The primary\r\nobjective of this well was to define the oil-water contact for the structure. This\r\nwould be achieved by penetrating the OWC or by extrapolation of fluid gradients\r\nfrom RFT and DST pressure measurements.\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 30/6-6 was spudded with\r\nthe semi-submersible installation Deepsea Saga on 9 January 1982 and drilled to\r\nTD at 3225 m in the Early Jurassic Cook Formation. Drilling operations proceeded\r\nwithout specific problems down to ca 1300 m. At this depth problems related to excessive\r\ntorque and drag on short trips occurred. The mud weight was then reduced from\r\n1.4 to 1.29 after which drilling again proceeded without problems. The well was\r\ndrilled with spud mud down to 200 m, with Gel/seawater/spud mud from 200 m to\r\n1793 m, and with gel/lignosulphonate mud from 1793 m to TD.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eTop Viking Group was penetrated at 2587 m\r\nand consisted of 113 m Draupne Formation shales on top of 120 m Heather\r\nFormation. The Brent Group was encountered at 2820 m. It was water bearing.\r\nCombined RFT-pressures from 30/6-6 and 30/6-4 gave an oil/water contact at 2720\r\n+/- 20 m, which was later confirmed by the build-up pressures from the DST and\r\nthe calculated water density under reservoir conditions. No indications of H2S\r\nwere seen in this well. No shows are reported from the well.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eThree cores were taken in the Ness and\r\nEtive formations from 2921 m - 2964 m. RFT water samples were attempted at 2879\r\nm, 2955 m and 2956 m, but were only moderately successful due to poor recovery\r\nand ",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
}