{
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  "LayerId" : 254,
  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 1644,
    "wlbName" : "25/1-8 SR4",
    "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\u003eThe Frigg Field was discovered by well\r\n25/1-1 in 1971 and set in production in May 1977. Well 25/1-8 S was drilled in\r\nthe summer of 1985 to monitor changes in gas/fluid contact, uncover\r\npermeability barriers and pressure gradients in the Frigg Formation, refine the\r\ngeological model, and provide ties for seismic interpretations. Before\r\nproduction started the Frigg Field fluid contacts were: OWC = 1955.9 m TVD MSL\r\nand GOC = 1948.2 m TVD MSL. In July 1985 in 25/1-8 S found the oil-leg to be\r\nall swept with the exception of a very thin oil-layer lifted to 1903.5 m TVD\r\nMSL, 2 m below the new gas/liquid contact, which was now a gas/water contact\r\n(GWC) at 1901.3 m TVD MSL. The objective of the fourth re-entry well 25/1-8 SR4\r\nwas to monitor further changes in the GWC and to permanently plug and abandon\r\nthe well.\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 25/1-8 S was re-entered\r\n(25/1-8 SR4) with the semi-submersible installation West Vanguard on 3 April 1991.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eThe GWC was found at 1897.5 m TVD MSL, the\r\nsame as in 25/1-8 SR3. This showed a similar situation as in well 25/1-7 and\r\ncorresponding re-entries ca 2.5 km to the north. It showed that gas drainage\r\nwas blocked by shale barriers over large areas in the central parts of the\r\nfield.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eNo cores were cut. The RFT was run, and 6\r\npressure points were taken but no fluid samples.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eThe well was permanently abandoned on 14\r\nApril 1991 as a gas appraisal well.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cb\u003e\u003cspan lang=EN-GB\u003eTesting\u003c/span\u003e\u003c/b\u003e\u003cspan lang=EN-GB\u003e \u003c/span\u003e\u003c/p\u003e\r\n\r\n\u003cp class=MsoBodyText\u003e\u003cspan lang=EN-GB\u003eNo drill stem test was performed.\u003c/span\u003e\u003c/p\u003e\r\n\r\n\r\n\r\n",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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}