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    "wlbNpdidWellbore" : 1173,
    "wlbName" : "6406/3-4",
    "wlbHistory" : "\r\n\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWell 6406/3-4 was drilled to appraise\r\nthe Trestakk oil discovery made with well 6406/3-2. The primary purpose of the\r\nwell was to appraise hydrocarbon accumulations of significant amounts in the\r\nMiddle Jurassic reservoirs down flanks on the Trestakk structure. Secondary\r\nobjectives were to check for hydrocarbon accumulations deeper than the\r\nstructural closure of the main field, to verify the geophysical and structural\r\ninterpretation, and improve the geological, paleontological and geochemical\r\nunderstanding of the area. Total depth was to be 50 m into the Ti1je Formation.\u003c/p\u003e\r\n\r\n\u003cp\u003e\u003cb\u003eOperations and results\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eAppraisal well 6406/3-4 was spudded with\r\nthe Dyvi Offshore semi-submersible installation Dyvi Delta on 25 September 1987\r\nand drilled to TD at 4414 m in Early Jurassic Tilje Formation. The well was\r\ndrilled with seawater and hi-vis pills down to 1179 m, with gypsum/polymer mud\r\nfrom 1179 m to 3984 m, and with gel/lignosulphonate mud from 3984 m to TD.\r\nDrilling proceeded without significant problems and there were no signs of\r\nshallow gas. An expected pressure build-up started in Paleocene and reached its\r\nmaximum at 1.50 g/cm3 EMV in the top of Cretaceous. After this the\r\nover-pressure decreased and was at 1.42 g/cm3 EMV close to top Jurassic.\u003c/p\u003e\r\n\r\n\u003cp\u003eA very weak show was recorded in\r\nassociation with a 2.61% gas peak at 2469 m in the Springar Formation. From\r\n2450 m in the Nise Formation to 2670 m shows were recorded on 50 % of sandstone\r\nsamples. These shows appeared to be a volatile, light petroleum and continued,\r\ngradually disappearing, down to 2750 m in the Nise Formation. Top reservoir\r\ncame in at 4018 m. There were good shows on cores down to 4078 m, but the\r\nreservoir qualities did not seem to be very good due to low permeability. In\r\nthe Ile Formation poor shows were recorded on cores, indicating tight rocks or\r\nresidual oil. Residual shows were recorded also in the Tofte Formation, while\r\nweak "background" shows were recorded in the Tilje",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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