{
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  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 504,
    "wlbName" : "31/2-2 R",
    "wlbHistory" : "\r\n\r\n\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWell 31/2-2 R is a re-entry of well\r\n31/2-2, which was suspended due to rig repair after setting the 9 5/8"\r\ncasing. The aim of the re-entry was to drill through the Jurassic and into the\r\nTriassic, and to conduct a drill stem test in the Late Jurassic oil and gas\r\nzones. The oil test was considered very important and should replace the\r\nabandoned test of the oil zone in well 31/2-1.\u003c/p\u003e\r\n\r\n\u003cp\u003e\u003cb\u003eOperations and results\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWell 31/2-2 was re-entered (31/2-2 R)\r\nwith the semi-submersible installation West Venture on 2 June 1980. The\r\nre-entry depth was 1857 m and new formation was drilled to TD at 2600 m in the\r\nTriassic Hegre Group. The testing phase was interrupted by a 31 days strike\r\nfrom 14 July 1980. The well was drilled with gel and lignosulphonate from the\r\nre-entry point to TD. \u003c/p\u003e\r\n\r\n\u003cp\u003eThe well below re-entry depth consisted\r\nof well-developed Middle to Early Jurassic sequences (Brent and Dunlin Groups,\r\nStatfjord Formation) and 100 m of Triassic Hegre Group sediments before TD was\r\nreached.\u003c/p\u003e\r\n\r\n\u003cp\u003eAfter plugging the well it proved\r\nimpossible to retrieve the Temporary Guide Base, which was left on the se\r\nfloor, below the mud line in a crater. The well was permanently abandoned on 6\r\nOctober 1980 as a gas and oil appraisal.\u003c/p\u003e\r\n\r\n\u003cp\u003e\u003cb\u003eTesting\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eA full production test was carried out\r\nover three intervals in order to test both the oil zone from 1579 m to 1591 m\r\nand the gas zone from 1544 m to 1579 m.\u003c/p\u003e\r\n\r\n\u003cp\u003eTest #1 from the interval 1586.5 m to\r\n1588.5 m tested the oil zone, and a gravel pack completion and regular\r\nproduction string were used. A total of 42 days were spent on this test as it\r\nwas of extreme importance to get this zone properly tested. A maximum flow rate\r\nof 132 Sm3 oil/day at a GOR of 53 Sm3/Sm3 was obtained during 24 hours after\r\nacid stimulation of the well, but it declined to 76 Sm3/day during the next\r\ndays. At this point operations were interrupted for a month by the strike.\r\nAfter the strike a further test of t",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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}