6407/6-1
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General information
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Wellbore history
GeneralWell 6407/6-1 was the third well to be drilled on the TrØndelag Platform offshore Mid Norway. The primary objective of the well was to investigate the reservoir potential of Middle Jurassic Sandstones (Fangst Group). Secondary objectives of the well were the Early Jurassic Sandstone Hl-2 (Tilje and Åre Formations), and sandstones in the Triassic.Operations and resultsWildcat well 6407/6-1 was spudded with the semi-submersible installation Zapata Ugland on 16 September 1984 and drilled to TD at 2895, 47 m into the Triassic Red Beds. In the 12 1/4" hole section the hole suddenly packed off at 1591, probably due to overpressured Early Eocene clays. The pipe was worked free and the mud weight increased. After that drilling proceeded without further difficulties. Logs were not run below 2869 m. The well was drilled with seawater/hi-vis slugs/gel down to 456 m, with gypsum/lignosulphonate mud from 456 m to TD. The well proved a good "upper sandstone member" (Garn Formation), and a "lower sandstone member" (Ile Formation). Sandstone sequences interbedded with siltstone, claystone, and coals were encountered also in the interval 2244 m to 2457 m, the Tilje Formation. Isolated weak shows were recorded on core no 1 in the lower part of the Garn Formation, otherwise no shows were observed in any part of the well. The RFT tool was run in the Middle Jurassic and four pressure points were obtained in good to very good permability sandstone in the Garn Formation. The average gradient was 1.00 g/cm, indicating the formation was water bearing. The electrical logs proved all reservoir sections in the well to be water bearing.Four cores were cut in the Middle Jurassic Sandstone over the interval from 1870 - 1888.2 m. No fluid samples were taken.The well was permanently abandoned on 26 October 1984 as a dry well.TestingNo drill stem test was performed. -
Cuttings at the Norwegian Offshore Directorate
Cuttings at the Norwegian Offshore Directorate Cuttings available for sampling?NOCuttings at the Norwegian Offshore Directorate Cutting sample, top depth [m]Cutting samples, bottom depth [m]320.002892.00 -
Cores at the Norwegian Offshore Directorate
Cores at the Norwegian Offshore Directorate Core sample numberCore sample - top depthCore sample - bottom depthCore sample depth - uom11870.01877.3[m ]21877.31886.4[m ]31887.11887.6[m ]41887.71888.2[m ]Cores at the Norwegian Offshore Directorate Total core sample length [m]17.3Cores at the Norwegian Offshore Directorate Cores available for sampling?YES -
Core photos
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Palynological slides at the Norwegian Offshore Directorate
Palynological slides at the Norwegian Offshore Directorate Sample depthDepth unitSample typeLaboratory1500.0[m]DCSTRAT1515.0[m]DCSTRAT1530.0[m]DCSTRAT1545.0[m]DCSTRAT1560.0[m]DCSTRAT1575.0[m]DCSTRAT1590.0[m]DCSTRAT1605.0[m]DCSTRAT1620.0[m]DCSTRAT1635.0[m]DCSTRAT1650.0[m]DCSTRAT1665.0[m]DCSTRAT1680.0[m]DCSTRAT1695.0[m]DCSTRAT1710.0[m]DCSTRAT1725.0[m]DCSTRAT1731.0[m]DCSTRAT1740.0[m]DCSTRAT1745.5[m]SWCSTRAT1750.4[m]SWCSTRAT1755.0[m]SWCSTRAT1760.0[m]SWCSTRAT1770.0[m]SWCSTRAT1780.0[m]SWCSTRAT1790.0[m]SWCSTRAT1800.0[m]SWCSTRAT1810.0[m]SWCSTRAT1815.0[m]SWCSTRAT1817.2[m]SWCSTRAT1819.4[m]SWCSTRAT1824.5[m]SWCSTRAT1831.7[m]SWCSTRAT1833.5[m]SWCSTRAT1834.2[m]SWCSTRAT1834.9[m]SWCSTRAT1836.3[m]SWCSTRAT1837.7[m]SWCSTRAT1842.0[m]SWCSTRAT1845.9[m]SWCSTRAT1849.5[m]SWCSTRAT1850.7[m]SWCSTRAT1854.3[m]SWCSTRAT1855.5[m]SWCSTRAT1858.0[m]SWCSTRAT1861.0[m]SWCSTRAT1864.0[m]SWCSTRAT1867.0[m]SWCSTRAT1870.3[m]CSTRAT1871.6[m]CSTRAT1874.9[m]CSTRAT1875.2[m]CSTRAT1876.2[m]CSTRAT1876.5[m]CSTRAT1879.1[m]CSTRAT1880.5[m]CSTRAT1881.6[m]CSTRAT1882.5[m]CSTRAT1887.3[m]CSTRAT1887.9[m]CSTRAT1890.0[m]DCSTRAT1905.0[m]DCSTRAT1923.0[m]DCSTRAT1933.0[m]SWCSTRAT1935.0[m]DCSTRAT1948.0[m]SWCSTRAT1986.0[m]DCSTRAT1987.0[m]SWCSTRAT1995.0[m]DCSTRAT2002.0[m]SWCSTRAT2010.0[m]DCSTRAT2017.0[m]SWCSTRAT2025.0[m]DCSTRAT2039.0[m]SWCSTRAT2040.0[m]DCSTRAT2055.0[m]DCSTRAT2070.0[m]DCSTRAT2091.0[m]DCSTRAT2091.5[m]SWCSTRAT2103.0[m]DCSTRAT2107.0[m]SWCSTRAT2115.0[m]DCSTRAT2126.0[m]SWCSTRAT2130.0[m]DCSTRAT2142.0[m]SWCSTRAT2145.0[m]DCSTRAT2160.0[m]DCSTRAT2175.0[m]DCSTRAT2190.0[m]DCSTRAT2197.0[m]SWCSTRAT2205.0[m]DCSTRAT2220.0[m]DCSTRAT2220.0[m]SWCSTRAT2235.0[m]DCSTRAT2242.0[m]SWCSTRAT2250.0[m]DCSTRAT2252.0[m]SWCSTRAT2262.0[m]SWCSTRAT2265.0[m]DCSTRAT2276.0[m]SWCSTRAT2280.0[m]DCSTRAT2295.0[m]DCSTRAT2298.0[m]SWCSTRAT2307.0[m]DCSTRAT2313.0[m]SWCSTRAT2325.0[m]DCSTRAT2340.0[m]DCSTRAT2341.0[m]SWCSTRAT2352.0[m]DCSTRAT2377.0[m]SWCSTRAT2388.0[m]DCSTRAT2400.0[m]DCSTRAT2415.0[m]DCSTRAT2418.0[m]SWCSTRAT2430.0[m]DCSTRAT2445.0[m]DCSTRAT2460.0[m]DCSTRAT2471.5[m]SWCSTRAT2475.0[m]DCSTRAT2490.0[m]DCSTRAT2505.0[m]DCSTRAT2510.0[m]SWCSTRAT2520.0[m]DCSTRAT2535.0[m]DCSTRAT2550.0[m]DCSTRAT2562.0[m]SWCSTRAT2564.0[m]DCSTRAT2580.0[m]DCSTRAT2591.0[m]SWCSTRAT2595.0[m]DCSTRAT2610.0[m]DCSTRAT2611.0[m]SWCSTRAT2625.0[m]DCSTRAT2640.0[m]DCSTRAT2653.5[m]SWCSTRAT2655.0[m]DCSTRAT2670.0[m]DCSTRAT2678.5[m]SWCSTRAT2685.0[m]DCSTRAT2693.5[m]SWCSTRAT2710.5[m]SWCSTRAT2715.0[m]DCSTRAT2730.0[m]DCSTRAT2734.5[m]SWCSTRAT2742.3[m]SWCSTRAT2753.0[m]SWCSTRAT2760.0[m]DCSTRAT2775.0[m]SWCSTRAT2788.0[m]SWCSTRAT2790.0[m]DCSTRAT2805.0[m]DCSTRAT2807.0[m]SWCSTRAT2817.5[m]SWCSTRAT2820.0[m]DCSTRAT2849.0[m]SWCSTRAT2850.0[m]DCSTRAT2857.0[m]SWCSTRAT2865.0[m]DCSTRAT2880.0[m]DCSTRAT2892.0[m]DCSTRAT -
Lithostratigraphy
Lithostratigraphy Top depth [mMD RKB]Lithostrat. unit253106310631611161116731745174518171817183418341843185618561986201920912091224424572848 -
Composite logs
Composite logs Document nameDocument formatDocument size [MB]pdf0.59 -
Geochemical information
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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]pdf18.37 -
Logs
Logs Log typeLog top depth [m]Log bottom depth [m]CBL VDL CCL GR2531333CBL VDL CCL GR2531872CST17451836CST18361870CST19002341CST23562859ISF BHC MSFL SP NGT18722867ISF LSS MSFL SP GR2531887ISF LSS MSFL SP NGT28012867LDL CNL GR4562863LDL GR313458LDL GR313458MWD - GR RES DIR2531870NGT18722867NGT28012864RFT GR18581872SHDT GR15702864VSP10632863 -
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 typeCONDUCTOR30314.036316.00.00LOTSURF.COND.20456.026463.01.30LOTINTERM.13 3/81334.017 1/21349.01.75LOTINTERM.9 5/81873.012 1/41888.01.68LOTOPEN HOLE2895.08 1/22895.00.00LOT -
Drilling mud
Drilling mud Depth MD [m]Mud weight [g/cm3]Visc. [mPa.s]Yield point [Pa]Mud typeDate measured9541.14WATER BASED27.09.198412331.2513.08.0WATER BASED28.09.198413471.2819.08.0WATER BASED01.10.198413521.3428.08.0WATER BASED04.10.198416001.4324.06.0WATER BASED04.10.198418721.4321.06.7WATER BASED15.10.198418801.1011.05.0WATER BASED15.10.198428951.1018.05.8WATER BASED19.10.1984 -
Pressure plots
Pressure plots The pore pressure data is sourced from well logs if no other source is specified. In some wells where pore pressure logs do not exist, information from Drill stem tests and kicks have been used. The data has been reported to the NPD, and further processed and quality controlled by IHS Markit.Pressure plots Document nameDocument formatDocument size [MB]pdf0.27