{
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    "wlbNpdidWellbore" : 353,
    "wlbName" : "25/2-1",
    "wlbHistory" : "\r\n\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eThe 25/2-1 well was drilled on the top of\r\nthe eastern structure on the WSW-ENE trend of the Frigg Field. The objective of\r\nthis well was the lower tertiary sands, especially Eocene, which are equivalent\r\nto the gas - bearing sand section in the western Frigg wells. Their thickness\r\nrange around 100 m according to the seismic. Sandy interbeds in the upper part\r\nof the cretaceous chalk were considered secondary objective.\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 25/2-1 was spudded with the\r\nsemi-submersible installation Neptune 7 on 4 August 1973 and drilled to TD at\r\n2740 m in the Late Cretaceous Hardråde Formation.\u003c/p\u003e\r\n\r\n\u003cp\u003eTop Frigg sand was found at 1915 m, only\r\n8 meters above the average seismic estimate. As expected, the Frigg sand body\r\nwas found underlying the Eocene green and brown-red shales. The net sands are\r\n88 m thick with excellent reservoir qualities (30 % to 24 % on the cores). The\r\ntop of the reservoir stands 7 m deeper than in well 25/1-1. The net pay zone in\r\nthe Frigg Formation includes 56 m of gas bearing and seven m of oil bearing\r\nsand. The gas/oil interface at 1971 m was found exactly at the same depth as in\r\nthe Frigg Field. Two wire-line tests were performed in the gas-zone at 1973 m\r\nand 1974 m. The second of these was plugged by sand. A Third wire line test in\r\nthe transition zone at 1985 m produced some oil with 70% salt water (35 g/l).\r\nPaleocene reservoirs below Frigg were of very good quality too, but all Sands\r\nbelow the Frigg Formation were found water wet.á Only very weak shows were recorded\r\nin the Paleocene (Hermod Formation), the Danian (Ty Formation) and\r\nMaastrichtian (HardrÕde Formation). Two cores were cut in the Frigg Formation,\r\nthe first in the interval 1950 m to 1968 m, and the second in the interval 1973\r\nm to 1991 m.\u003c/p\u003e\r\n\r\n\u003cp\u003e\u003cb\u003eTesting\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eAn open hole test was carried out from\r\n1926 to 1938 m Just after setting the 9" 5/8 casing at 1907 m in order to\r\ncheck a new type of sand screen to be used in furthe",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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