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  "LayerName" : "Wellbore - History",
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    "wlbName" : "2/5-2",
    "wlbHistory" : "\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWell 2/5-2 was drilled as an appraisal\r\nwell on the 2/5-1 Tor Discovery in the southern Norwegian North Sea. The\r\nobjective was to evaluate the eastern part of the structure. \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 2/5-2 was spudded with the\r\njack-up installation M ærsk Explorer on 15 January 1971 and drilled to TD at\r\n3597 m in the Late Cretaceous Tor Formation. The well was drilled water based,\r\nbut with diesel addition below 1830 m.\u003c/p\u003e\r\n\r\n\u003cp\u003eThe well encountered top Paleocene\r\n(Balder Formation at 2978 m, top Danian chalk (Ekofisk Formation) at 3118 m,\r\nand top Late Cretaceous chalk (Tor Formation) at 3360 m. Commercial quantities\r\nof hydrocarbons were encountered in the Ekofisk Formation where a total of\r\napproximately 57 m net pay out of a gross section of 244 m was found. This was\r\na significant reduction from the 89 m net pay in the 2/5-1 discovery well.\r\nFurthermore, the water saturation in Ekofisk was higher in 2/5-2 compared to\r\n2/5-1 (41% and 22%, respectively).\u003c/p\u003e\r\n\r\n\u003cp\u003eFive conventional cores were cut in the\r\nintervals 3120 - 3188 m and 3235 - 3311 m in the Ekofisk Formation. No wire\r\nline fluid samples were taken.\u003c/p\u003e\r\n\r\n\u003cp\u003eThe well was permanently abandoned on 20\r\nApril 1971 as a 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\u003eSix drill stem tests were carried out:\r\nDST 1 in Late Cretaceous chalk (Tor Formation), DST 2 in the Late Cretaceous/\r\nDanian boundary, and DST 3 - 6 in Danian chalk (Ekofisk Formation). The\r\nfollowing results are after acidization: \u003c/p\u003e\r\n\r\n\u003cp\u003eDST 1 in the interval 3511 to 3513 m\r\nflowed minor quantities of slightly oil-cut mud. \u003c/p\u003e\r\n\r\n\u003cp\u003eDST 2 at 3350 - 3361 m flowed 165 Sm3, 34\r\nm3 water, and 39077 Sm3 gas /day on 64/64" + 32/64" choke. The oil\r\ngravity was 39 deg API and the GOR was 237 Sm3/Sm3. \u003c/p\u003e\r\n\r\n\u003cp\u003eDST 3 at 3299 - 3314 m flowed 629 Sm3 oil\r\nand 159900 Sm3 gas /day on a 23/64" choke. The oil gravity was 40.5 deg\r\nAPI and the GOR was 254 Sm3/Sm3. Maximum bottom hole temperature recorded in\r\n",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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