6407/10-2
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General information
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Wellbore history
GeneralWell 6407/10-2 was drilled on the B-II structure south-east of the Njord Field, and is characterized by a prominent hanging wall anticline and syncline off the Trøndelag Platform and shows little tectonic disturbance as seen on seismic sections. From tectonic model inferred in the area, the tectonic damage to the reservoir rocks was expected to be less than previously encountered in the A-Central and the A-North areas. Movements along the main fault during the Late Jurassic caused sedimentation of Triassic and / or Middle and Early Jurassic clastics of delta fan type. Source rock for B-II area was prognosed to be the mature part of the Spekk Formation. Possible shallow gas might be present some 30 - 40 m below sea level. One core would be taken in each of the Garn, Ile and Tilje formations. The main objectives for the well were to asses the reservoir quality and hydrocarbon potential of the Garn, Ile, and Tilje Formations and the Late Jurassic sequence; to obtain reservoir pressure; confirm the seismic and geological model; and to asses the presence of sands in the Early Cretaceous sequence.Prognosed TD was 3700 m in the upper part of the Tilje Formation, or alternatively 4040 m in Triassic rocks.Operations and resultsWildcat well 6407/10-2 was spudded with the semi-submersible rig Vildkat Explorer on 3 May 1990 and drilled to TD at 3825 m in the Early Jurassic Tilje Formation sandstones. The well was drilled with seawater and hi-vis pills down to1070 m and with KCl/Polymer/Polyacrylamide mud system from 1070 m to TD. In the 17 1/2" section 1070 to 2188 m mud from a previous well was used, below 2188 m fresh mud was used. Apart from some difficulties during logging, drilling went on without any significant problems. No shallow gas was encountered in this well. Apart from 8 m Lysing sand at 2378 m there was no significant sand body development in the Cretaceous succession. The Garn Formation was not present in the well location. Hydrocarbons were absent in both the Ile- and Tilje formations. Weak to very weak shows were observed on claystones between 2660 m to 2720 m in the Lange Formation. Moderate to very weak shows were observed on claystones and sandstones throughout most of the Jurassic section. A total of 180 sidewall cores were attempted in three runs, and 104 were recovered. Two conventional cores were cut in the Ile- and Tilje formations. No fluid samples were taken. The well was permanently abandoned on 23 June 1990 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?YESCuttings at the Norwegian Offshore Directorate Cutting sample, top depth [m]Cutting samples, bottom depth [m]1080.003825.00 -
Cores at the Norwegian Offshore Directorate
Cores at the Norwegian Offshore Directorate Core sample numberCore sample - top depthCore sample - bottom depthCore sample depth - uom13446.03457.2[m ]23682.03694.0[m ]Cores at the Norwegian Offshore Directorate Total core sample length [m]23.2Cores 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 typeLaboratory1080.0[m]DCSTRAT1090.0[m]DCSTRAT1110.0[m]DCSTRAT1140.0[m]DCSTRAT1170.0[m]DCSTRAT1210.0[m]DCSTRAT1250.0[m]DCSTRAT1290.0[m]DCSTRAT1330.0[m]DCSTRAT1370.0[m]DCSTRAT1400.0[m]DCSTRAT1440.0[m]DCSTRAT1480.0[m]DCSTRAT1520.0[m]DCSTRAT1560.0[m]DCSTRAT1620.0[m]DCHYDRO1630.0[m]DCHYDRO1640.0[m]DCSTRAT1660.0[m]DCHYDRO1680.0[m]DCSTRAT1720.0[m]DCSTRAT1760.0[m]DCSTRAT1800.0[m]DCSTRAT1840.0[m]DCSTRAT1860.0[m]DCHYDRO1880.0[m]DCSTRAT1890.0[m]DCHYDRO1900.0[m]DCHYDRO1910.0[m]DCHYDRO1920.0[m]DCSTRAT1960.0[m]DCSTRAT2000.0[m]DCSTRAT2040.0[m]DCSTRAT2080.0[m]DCSTRAT2120.0[m]DCSTRAT2160.0[m]DCSTRAT2200.0[m]DCSTRAT2240.0[m]DCSTRAT2280.0[m]DCSTRAT2410.0[m]DCSTRAT2430.0[m]DCSTRAT2445.0[m]DCSTRAT2455.0[m]DCSTRAT2465.0[m]DCSTRAT2495.0[m]DCSTRAT2505.0[m]DCSTRAT2515.0[m]DCSTRAT2525.0[m]DCSTRAT2555.0[m]DCSTRAT2585.0[m]DCSTRAT2595.0[m]DCSTRAT2605.0[m]DCSTRAT2615.0[m]DCSTRAT2635.0[m]DCSTRAT2675.0[m]DCSTRAT2685.0[m]DCSTRAT2695.0[m]DCSTRAT2705.0[m]DCSTRAT2715.0[m]DCSTRAT2735.0[m]DCSTRAT2745.0[m]DCSTRAT2755.0[m]DCSTRAT2765.0[m]DCSTRAT2775.0[m]DCSTRAT2795.0[m]DCSTRAT2805.0[m]DCSTRAT2815.0[m]DCSTRAT2822.0[m]DCPETROSTR2827.0[m]DCPETROS2832.0[m]DCPETROS2837.0[m]DCPETROS2842.0[m]DCPETROS2847.0[m]DCPETROS2852.0[m]DCPETROS2855.0[m]DCPETROS2855.0[m]DCSTRAT2860.0[m]DCPETROSTR2865.0[m]DCPETROS2870.0[m]DCPETROS2875.0[m]DCPETROS2880.0[m]DCPETROS2885.0[m]DCPETROS2885.0[m]DCSTRAT2890.0[m]DCPETROS2895.0[m]DCPETROS2895.0[m]DCSTRAT2900.0[m]DCPETROSTR2905.0[m]DCPETROS2910.0[m]DCPETROS2915.0[m]DCSTRAT2925.0[m]DCSTRAT2930.0[m]DCSTRAT2930.0[m]DCPETROSTR2935.0[m]DCSTRAT2945.0[m]DCSTRAT2947.0[m]DCPETROSTR2955.0[m]DCSTRAT2965.0[m]DCSTRAT2965.0[m]DCPETROSTR2975.0[m]DCSTRAT2985.0[m]DCSTRAT2985.0[m]DCPETROSTR3015.0[m]DCSTRAT3025.0[m]DCSTRAT3035.0[m]DCSTRAT3045.0[m]DCSTRAT3055.0[m]DCSTRAT3085.0[m]DCSTRAT3105.0[m]DCSTRAT3140.0[m]DCSTRAT3150.0[m]DCSTRAT3160.0[m]DCSTRAT3180.0[m]DCSTRAT3200.0[m]DCSTRAT3220.0[m]DCSTRAT3250.0[m]DCSTRAT3280.0[m]DCSTRAT3290.0[m]DCSTRAT3300.0[m]DCSTRAT3310.0[m]DCSTRAT3340.0[m]DCSTRAT3360.0[m]DCHYDRO3370.0[m]DCSTRAT3400.0[m]DCSTRAT3430.0[m]DCSTRAT3470.0[m]DCSTRAT3480.0[m]DCSTRAT3500.0[m]DCSTRAT3510.0[m]DCSTRAT3520.0[m]DCSTRAT3530.0[m]DCSTRAT3540.0[m]DCSTRAT3550.0[m]DCSTRAT3560.0[m]DCSTRAT3590.0[m]DCSTRAT3610.0[m]DCSTRAT3640.0[m]DCSTRAT3660.0[m]DCSTRAT3670.0[m]DCSTRAT3700.0[m]DCSTRAT3710.0[m]DCSTRAT3720.0[m]DCSTRAT3750.0[m]DCSTRAT3770.0[m]DCSTRAT3780.0[m]DCSTRAT3800.0[m]DCSTRAT3825.0[m]DCHYDRO -
Lithostratigraphy
Lithostratigraphy Top depth [mMD RKB]Lithostrat. unit359359100911051105162716271689187723782378238627702821282128302904332733273436347934793679 -
Composite logs
Composite logs Document nameDocument formatDocument size [MB]pdf0.53 -
Geochemical information
Geochemical information Document nameDocument formatDocument size [MB]pdf0.91 -
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]pdf19.10 -
Logs
Logs Log typeLog top depth [m]Log bottom depth [m]CBL VDL GR17002163CNL NGL AMS21633828CST GR22303010CST GR22303793CST GR30253813DIL LDL SP GR21633828DIL LSS LDL SP GR10542185FMS GR AMS21633828LSS GR00LSS GR21633250MWD - GR RES DIR3593825RFT HP AMS23833779SDT GR AMS30303826VSP22203810 -
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 typeCONDUCTOR30445.036447.00.00LOTINTERM.201056.0261070.01.95LOTINTERM.13 3/82164.017 1/22188.01.70LOTOPEN HOLE3825.012 1/43825.00.00LOT -
Drilling mud
Drilling mud Depth MD [m]Mud weight [g/cm3]Visc. [mPa.s]Yield point [Pa]Mud typeDate measured3971.07WATER BASED03.05.19904061.07WATER BASED04.05.19904431.07WATER BASED10.05.19904471.07WATER BASED10.05.19904481.07WATER BASED10.05.19908081.10WATER BASED10.05.199010701.07WATER BASED10.05.199010701.07WATER BASED14.05.199010701.10WATER BASED10.05.199010701.07WATER BASED14.05.199011771.4511.08.0WATER BASED14.05.199013641.6019.08.0WATER BASED14.05.199015291.6025.08.0WATER BASED15.05.199016561.6024.013.0WATER BASED16.05.199019691.5926.010.0WATER BASED21.05.199020401.3217.010.0WATER BASED22.06.199021191.6030.013.0WATER BASED21.05.199021681.6025.011.0WATER BASED21.05.199021881.5932.012.0WATER BASED21.05.199021881.5931.09.0WATER BASED21.05.199021911.3827.010.0WATER BASED22.05.199024351.3825.010.0WATER BASED23.05.199025901.3823.011.0WATER BASED25.05.199026561.3918.010.0WATER BASED25.05.199027681.3826.08.0WATER BASED28.05.199028531.3821.010.0WATER BASED28.05.199028871.3817.010.0WATER BASED28.05.199029601.3828.010.0WATER BASED29.05.199030331.3821.07.0WATER BASED30.05.199031641.3827.07.0WATER BASED31.05.199032021.3821.010.0WATER BASED05.06.199032521.3820.010.0WATER BASED05.06.199033051.3825.012.0WATER BASED05.06.199033571.3824.010.0WATER BASED05.06.199033701.3217.010.0WATER BASED21.06.199034111.3822.011.0WATER BASED05.06.199034421.3814.010.0WATER BASED06.06.199034581.3823.013.0WATER BASED07.06.199035091.3820.010.0WATER BASED08.06.199035531.3820.010.0WATER BASED11.06.199035871.3822.012.0WATER BASED11.06.199036411.3820.013.0WATER BASED11.06.199036641.3822.012.0WATER BASED12.06.199036821.3822.012.0WATER BASED13.06.199037001.3820.012.0WATER BASED14.06.199038061.3819.014.0WATER BASED14.06.199038251.3819.014.0WATER BASED18.06.199038251.3217.010.0WATER BASED18.06.199038251.3819.014.0WATER BASED18.06.199038251.3217.010.0WATER BASED19.06.199038251.3217.010.0WATER BASED20.06.1990 -
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]pdf0.24