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  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 1440,
    "wlbName" : "2/4-14 R",
    "wlbHistory" : "\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWell 2/4-14 R was designed to\r\nre-establish full well control of the uncontrolled flow in well 2/4-14 by using\r\nboth well 2/4-14 R and 2/4-15 S. The RKB with Neddrill Trigon is 37 m, but all\r\ndepths in this account are relative to the RKB of Treasure Saga (26 m) for\r\neasier comparison with other the well bores and re-entries involved in the blow\r\nout.\u003c/p\u003e\r\n\r\n\u003cp\u003eSince the underground blow out occurred\r\nin well 2/4-14 in January 1989 various surveys and analyses had been conducted\r\nto monitor any flow of gas into shallow strata in the area. Gas bubbles from\r\nthe site of the 2/4-13 well head were first time reported from ROV surveys in\r\nAugust 1989. A Sidescan Sonar Search was performed in the period from late June\r\n1989 up to late March 1990. No gas leakage was detected by this method. A\r\nseismic surveillance study was performed in the 2/4-14 area by Read Well\r\nServices A/S in order to monitor the noise and acoustic activity caused by\r\npossible cracking due to migration of hydrocarbons into the shallow sand\r\nlayers. Four seismometers were placed on the seafloor from 21 September to 2\r\nOctober 1989. Analysis of these data proved seismic activity, possibly due to\r\nthe pressure build-up and release of energy related to the hydrocarbon\r\naccumulation in the sand layers. Geochemical analyses of gas samples from wells\r\n2/4-13, 2/4-14, and 2/4-15 were conducted. Variable mixes of shallow (biogenic)\r\nwith deep reservoir (thermogenic) gasses were found in the samples, with the\r\nhighest proportion of thermogenic gas in the depression of well 2/4-13. Seismic\r\nshallow anomalies corresponding to sands at 828, 492 and 445 m were mapped in\r\nMarch 1990, indicating recipients for leaking hydrocarbons.\u003c/p\u003e\r\n\r\n\u003cp\u003eThe 2/4-14 R well program covers the phase\r\nfrom where the 7" liner has been set, cemented, logged and successfully\r\npressure tested in well 2/4-15 S. \u003c/p\u003e\r\n\r\n\u003cp\u003e\u003cb\u003eOperations and results\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eJack-up rig Neddrill Trigon arrived the\r\n2/4-14 location on 21 March 1989. A sub sea snubbin",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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