{
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  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 501,
    "wlbName" : "31/2-5 R2",
    "wlbHistory" : "\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWildcat well 31/2-5 is located in the\r\nsouthern part of the oil province in the Troll West area, some 6 km west of the\r\ndiscovery well 31/2-1, in a downthrown fault block. It was drilled in 1980 and\r\ntested in the re-entry 31/2-5 R in 1981. The objective of the second re-entry\r\nwas to test and quantify the water mobility (oil-water coning behaviour) in the\r\naquifer zone underlying the oil column to provide input for the Field\r\nDevelopment Plan of the Troll Field.\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 31/2-5 R was re-entered\r\n(31/2-5 R2) with the semi-submersible installation Borgny Dolphin on 22 March\r\n1984. The cement suspension plug (1261 m to 1450 m) was drilled out and a test\r\nwas carried out.\u003c/p\u003e\r\n\r\n\u003cp\u003eThe well was permanently abandoned on 22\r\nApril 1984.\u003c/p\u003e\r\n\r\n\u003cp\u003e\u003cb\u003eTesting\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eA 3 m interval directly above the\r\noil-water contact (1566-1569 m SS) was production tested. The test was\r\nconducted in three periods, a cleanup period (PT-2A), a period before acid\r\ntreatment (PT-2B), and a period after acid treatment (PT-2C) The oil sample\r\navailable from the NPD was sampled in PT-2B. The well produced up to 1002 Sm3\r\n(6300 bbl) liquid /day. The water cut decreased in two days from high initial\r\nvalues (> 40%) to a stable value of 20%, independent of the liquid rate. The\r\nstable water cut was apparently controlled exclusively by the relative\r\nmobilities of oil and water. The rate dependence of the Productivity Index,\r\nsignificant before the acid job, almost disappeared after acidizing.\u003c/p\u003e\r\n\r\n\r\n",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
  }
}