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  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 1679,
    "wlbName" : "2/7-25 S",
    "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 2/7-25 S was drilled on the Embla\r\nstructure in the southern North Sea. The objective of the well was to prove the\r\nsouth-eastern continuation of the Embla reservoir sands seen in 2/7-20 and\r\n2/7-21S, and if successful establish another drainage point for future\r\ndevelopment.\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 2/7-25 S was drilled from\r\na temporary subsea template located over the 2/7-20 well, using the\r\nsemi-submersible installation West Delta. It was spudded on 29 November 1990\r\nand drilled to TD at 5177 m (4560 m TVD) in pre-Jurassic rocks. The well was\r\ndeviated to a target location 2072 m southeast of the wellhead. I was drilled\r\nwithout any major problems. Shallow gas was encountered in four sand intervals\r\nin the 26" hole section over the interval 595 -652 m. A minor gas flow was\r\ncontrolled using 11.0 ppg kill mud with high viscosity pills. The well was\r\ndrilled with sea water down to 780 m, with ester emulsion based Petrofree mud\r\nfrom 780 m to 4557 m, and with oil based Enviromul mud from 4557 m to TD.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eTop Jurassic, Mandal Formation was\r\nencountered at 4711 m. The Jurassic consisted of 117 m Mandal Formation, 112 m\r\nFarsund Formation, and 214 m Eldfisk Formation at the base. Under the Eldfisk\r\nFormation, at 5157 m (4540 m TVD), a pre-Jurassic section was encountered. Oil\r\nshows were detected from 1594 m to 1786 m, with good shows from 1704 m to 1750\r\nm at top Hordaland Group. Further oil shows were seen throughout all parts of\r\nthe limestone section but were concentrated in the intervals 3470 m to 3484 m\r\nin the Ekofisk Formation and 4328 m to 4435 m in the Hod Formation. In addition\r\nsolid bitumen staining was described on cores from the Mandal and Eldfisk\r\nFormations.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eA ",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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