{
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  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 61,
    "wlbName" : "6407/1-2",
    "wlbHistory" : "\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eThe wildcat 6407/1-2 was drilled 43 m NW\r\nof well 6407/1-1, which was drilled to 900 m before it was junked due to\r\nproblems with setting the 20" casing. The objective for both wells was to\r\ntest for hydrocarbons in Jurassic sandstones. The primary target was Middle\r\nJurassic sand horizons, Early Jurassic sands was secondary target. The well was\r\nthe first well north of 62 degrees to encounter liquid petroleum.\u003c/p\u003e\r\n\r\n\u003cp\u003eThe well is Type Well for the Kai\r\nFormation and Reference Well for the Nordland Group. It is Reference Well for\r\nthe Lyr Formation, the Fangst Group, and the BÅt Group\u003c/p\u003e\r\n\r\n\u003cp\u003e\u003cb\u003eOperations and results\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWildcat well 6407/1-2 was spudded with\r\nthe semi-submersible installation Dyvi Delta on 13 November 1982 and drilled to\r\nTD at 4560 m in the Late Triassic Grey Beds. The well was drilled with\r\nseawater/gel down to 901 m, with gypsum/lignosulphonate from 901 m to 3568 m,\r\nand with Spersene/XP-20/resin from 3568 m to TD. At 1817 m loss of mud to the\r\nformation was discovered. A survey showed that this was caused by a collapse of\r\n20" casing from approximately 667 m. It was therefore decided to run the\r\n13 3/8" casing at this point. A total of 164 days were spent on the\r\ndrilling phase, which was 56 days more than prognosed. 22 days were lost due to\r\nbad weather, 17 days due to BOP problems, 4 days working with the collapsed\r\n20" casing, 7 days were spent on fishing when the drill string parted. A\r\nfurther 12 days were spent on excessive reaming in the 12 1/4" hole in the\r\nPaleocene and top of the Cretaceous formation, and in the 8 1/2" hole in\r\nthe Heather formation. The reaming was necessary when running back in hole\r\nafter several days WOW with the BOP closed and the riser disconnected. The well\r\nwas drilled 60 meters deeper than prognosed. The testing phase lasted for 21\r\ndays, which includes a 7" casing tie back operation of 6 days, which was\r\nnecessary because of a leak in the 9 5/8" at approximately 1850 m. The",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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}