25/11-22
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General information
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Wellbore history
GeneralWell 25/11-22 was drilled east of the Grane Field to test the hydrocarbon potential of the AQ prospect. Primary target was a prognosed 23 m thick Heimdal sand body within the Lista Formation shale. The trap was estimated as a stratigraphic pinch out of the sand.Operations and resultsExploration well 25/11-22 was spudded with the semi-submersible installation "West Vanguard" on 7 January 1998 and drilled to a total depth of 1805 m, 31m into the Tor Formation. The well was drilled with seawater and bentonite down to 1249 m and with "ANCO 2000" mud from 1249 m to TD. No sand was detected. No hydrocarbons were detected. A total of 5 cores were cut from 1686 m to 1771 m in claystones in the Sele, Lista, and Våle Formations. The recovery varied from 20% to 99.7%. No fluid samples were taken. The well was permanently abandoned as a dry well on 24 January 1998.TestingNo drill stem test was performed. -
Cuttings at the Norwegian Offshore Directorate
Cuttings at the Norwegian Offshore Directorate Cuttings available for sampling?YESCuttings at the Norwegian Offshore Directorate Cutting sample, top depth [m]Cutting samples, bottom depth [m]1252.001805.00 -
Cores at the Norwegian Offshore Directorate
Cores at the Norwegian Offshore Directorate Core sample numberCore sample - top depthCore sample - bottom depthCore sample depth - uom11686.01717.9[m ]21718.01722.4[m ]31736.01746.0[m ]41747.01760.3[m ]51770.01770.2[m ]Cores at the Norwegian Offshore Directorate Total core sample length [m]59.7Cores at the Norwegian Offshore Directorate Cores available for sampling?YES -
Core photos
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Casing and leak–off tests
Casing and leak–off tests Casing typeCasing diam.
[inch]Casing depth
[m]Hole diam.
[inch]Hole depth
[m]LOT/FIT mud eqv.
[g/cm3]Formation test typeCONDUCTOR30209.036209.00.00LOTSURF.COND.13 3/81250.017 1/21250.00.00LOTOPEN HOLE1599.012 1/41599.00.00LOTOPEN HOLE1805.08 1/21805.00.00LOT -
Logs
Logs Log typeLog top depth [m]Log bottom depth [m]CST GR16751785FMI DSI HNGS AMS2061803FMI DSI HNGS AMS13601803MWD - GR RES DIR1451686MWD - GR RES DIR17711805PEX-HALS TLD CNL SP GR AMS12051803VSP GR1801790 -
Lithostratigraphy
Lithostratigraphy Top depth [mMD RKB]Lithostrat. unit145714770845845903948955982993101010271047110716771677168616921769177417741785 -
Composite logs
Composite logs Document nameDocument formatDocument size [MB]pdf0.26 -
Documents – reported by the production licence (period for duty of secrecy expired)
Documents – reported by the production licence (period for duty of secrecy expired) Document nameDocument formatDocument size [MB]pdf0.92pdf8.38 -
Drilling mud
Drilling mud Depth MD [m]Mud weight [g/cm3]Visc. [mPa.s]Yield point [Pa]Mud typeDate measured2091.05WATER BASED5301.05WATER BASED12501.20WATER BASED13431.3012.0WATER BASED16521.3020.0WATER BASED17181.3017.0WATER BASED17361.3020.0WATER BASED17591.3021.0WATER BASED17801.3020.0WATER BASED18051.3020.0WATER BASED -
Palynological slides at the Norwegian Offshore Directorate
Palynological slides at the Norwegian Offshore Directorate Sample depthDepth unitSample typeLaboratory1252.0[m]DCRRI1270.0[m]DCRRI1290.0[m]DCRRI1310.0[m]DCRRI1330.0[m]DCRRI1350.0[m]DCRRI1370.0[m]DCRRI1390.0[m]DCRRI1410.0[m]DCRRI1430.0[m]DCRRI1450.0[m]DCRRI1470.0[m]DCRRI1490.0[m]DCRRI1510.0[m]DCRRI1530.0[m]DCRRI1550.0[m]DCRRI1570.0[m]DCRRI1590.0[m]DCRRI1610.0[m]DCRRI1630.0[m]DCRRI1650.0[m]DCRRI1670.0[m]DCRRI1686.0[m]CRRI1688.0[m]CRRI1689.0[m]CRRI1690.0[m]CRRI1695.0[m]CRRI1696.0[m]CRRI1697.0[m]CRRI1698.0[m]CRRI1699.0[m]CRRI1700.0[m]CRRI1701.0[m]CRRI1705.0[m]CRRI1710.0[m]CRRI1715.0[m]CRRI1718.0[m]CRRI1720.0[m]CRRI1734.0[m]SWCRRI1741.0[m]CRRI1756.0[m]CRRI1758.0[m]CRRI1759.0[m]CRRI1760.0[m]DCRRI1761.0[m]SWCRRI1764.0[m]SWCRRI1765.0[m]DCRRI1767.0[m]SWCRRI1767.0[m]DCRRI1770.0[m]DCRRI1795.0[m]DCRRI1805.0[m]DCRRI