{
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  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 264,
    "wlbName" : "2/7-5",
    "wlbHistory" : "\r\n\r\n\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWell 2/7-5 was drilled ca 4.5 km\r\nnorth-northeast of the 2/7-4 well, which found oil in the Ekofisk and Tor\r\nFormations, the Edda Discovery. The objective of the 2/7-5 well was to test the\r\nEkofisk and Tor Formations in order to appraise the extension of this\r\ndiscovery.\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 2/7-5 was spudded with the\r\nsemi-submersible installation Ocean Viking on 3 September 1972 and drilled to\r\nTD at 3353 m in the Late Cretaceous Tor Formation. The well was drilled water\r\nbased with 3 - 6 % oil addition below 1217 m.\u003c/p\u003e\r\n\r\n\u003cp\u003eThe Ekofisk Formation was encountered at\r\n3110 m, and the Tor Formation at 3205 m. Both formations appeared to be\r\nhydrocarbon bearing, but the water saturation was high and the permeability was\r\ngenerally low, which probably explained the low flow rates of the zones tested.\r\n\u003c/p\u003e\r\n\r\n\u003cp\u003eEight conventional cores were cut in the\r\ninterval 3120 - 3158 m in the Ekofisk Formation, and another five cores were\r\ncut in the interval 3219 - 3300 m in the Tor Formation. The cores were reported\r\nto bleed gas and oil. Scattered shows (fluorescence) were observed from top of\r\nthe cored interval and down to 3285 m in the deepest core (core 13).\u00A0 No wire\r\nline fluid samples were taken.\u003c/p\u003e\r\n\r\n\u003cp\u003eThe well was permanently abandoned on 1\r\nJanuary 1973 as a dry well with shows.\u003c/p\u003e\r\n\r\n\u003cp\u003e\u003cb\u003eTesting\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eSeveral drill stem tests were conducted\r\nin the limestone and chalk of the Ekofisk and Tor Formations. Many were\r\nunsuccessful. Of the technically successful tests DST 1 from 3274 m to 3293 m\r\nand DST 2 from 3225 - 3237 m flowed water. DST 3 from 3210 - 3219 m flowed\r\nwater with gas and trace of oil. DST 4 from 3160 - 3185 m and DST 5 from 3120 -\r\n3130 m flowed minor amounts of gas and water.\u003c/p\u003e\r\n\r\n\r\n\r\n",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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