{
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  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 174,
    "wlbName" : "2/4-4",
    "wlbHistory" : "\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWell 2/4-4 (named 2/4-3X by operator\r\nPhillips) was drilled to appraise the southern segment of the 2/4-2 Ekofisk\r\ndiscovery. The Ekofisk discovery is located in the Central Trough in the\r\nsouthern Norwegian North Sea and its structure is an anticline, uplifted by\r\nhalokinetic movements of Permian salt. The objective of well 2/4-4 was to test\r\nthe Tertiary and the top of the Late Cretaceous. Planned total depth was 11000\r\nft (3352 m).\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 2/4-4 was spudded with the\r\nsemi-submersible installation Ocean Viking on 2 June 1970 and drilled to TD at\r\n3424 m in the Late Cretaceous Tor Formation. The well was drilled with seawater\r\nand hi-vis mud down to 622 m, and with seawater/drill-aid mud from 622 m to TD.\r\nTwo - six percent oil was added to the mud below 622 m.\u003c/p\u003e\r\n\r\n\u003cp\u003eThe Shetland Group was encountered with\r\ntop Ekofisk Formation at 3116 m and top Tor Formation at 3259 m. Oil was tested\r\nin the Ekofisk Formation in various zones in the interval 3127 - 3225 m. The\r\nTor Formation produced only water.\u003c/p\u003e\r\n\r\n\u003cp\u003eTwo short cores were cut in the Ekofisk\r\nFormation and one 8-m core was cut in the Tor Formation. No fluid samples were\r\ntaken on wire line.\u003c/p\u003e\r\n\r\n\u003cp\u003eThe well was permanently abandoned on 1\r\nAugust 1970 as an oil appraisal.\u003c/p\u003e\r\n\r\n\u003cp\u003e\u003cb\u003eTesting\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eEight drill stem tests through\r\nperforations in the 7" liner were carried out, one in the Tor Formation,\r\nthe rest in the Ekofisk Formation. The Tor test produced only water, the\r\nlowermost test in Ekofisk did not produce liquid to the surface, but 100 ft\r\n(30.5 m) gas cut mud was reversed out of the test string. The next lowermost\r\nEkofisk test, DST 3 from 3233 - 3236 m, also produced water and no\r\nhydrocarbons. The remaining tests, all in the Ekofisk Formation gave oil.\r\nMaximum flow was obtained from the interval 3162 - 3200 m in DST 8 with 601 Sm3\r\noil /day on two 3/4" chokes. The oil gravity was in the range 34.2 - 35.6\r\ndeg API and the GOR was in the range 165 ",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
}