30/6-24 S
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General information
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Wellbore history
GeneralWell 30/6-24 S was drilled on the Delta Structure, some 5 km north of the main Oseberg Field area. The primary objective was to test the hydrocarbon potential of the Statfjord Formation.Operations and resultsWildcat well was spudded with the semi-submersible installation Vildkat Explorer on 13 October 1991 and drilled to TD at 3986 m (3742 m TVD). The well was offset from the target location and deviated below 1035 m due to the proximity of a 30" gas pipeline above the target co-ordinates. An 8 1/2" pilot hole was drilled from 231 m to 422 m to check for shallow gas, but no shallow gas was found. The well was drilled with spud mud down to 1017 m, with KCl mud from 1017 m to 3300 m, and with Thermadril WBM mud from 3300 m to TD. When running the 9 5/8" casing it stuck at 3052 m. A spot of 25 m3 EZ spot/diesel was added to free the casing and this oil was in the mud down to 3974 m.An oil show was recorded on cuttings from a limestone stringer at 2505 m. Top Jurassic, Dunlin Group came in at 3581 m. Dunlin Group had sporadic weak shows on siltstone cuttings. Top of target reservoir Statfjord Group was encountered at 3683 m. It was water bearing with oil shows on core no 1 in a 2-meter zone from 3686 m to 3688 m. Otherwise no hydrocarbon indications were recorded in the well.Two cores were cut in the top of the Statfjord Group from 3682 m to 3712 m. No wire line fluid samples were taken.The well was permanently abandoned on 6 December 1991 as a dry well with shows.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]1040.003985.00 -
Cores at the Norwegian Offshore Directorate
Cores at the Norwegian Offshore Directorate Core sample numberCore sample - top depthCore sample - bottom depthCore sample depth - uom13682.03692.0[m ]23696.53712.0[m ]Cores at the Norwegian Offshore Directorate Total core sample length [m]25.5Cores 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 typeCONDUCTOR30231.036231.00.00LOTINTERM.13 3/81004.017 1/21017.01.95LOTINTERM.9 5/83052.012 1/43070.01.80LOTOPEN HOLE3986.08 1/23986.00.00LOT -
Logs
Logs Log typeLog top depth [m]Log bottom depth [m]DIL LSS SP GR AMS9702987DIL LSS SP GR AMS30563989FMS4 GR AMS30563990LDL CNL GR CAL AMS9702987LDL CNL GR CAL AMS30563990MWD1453741RFT HP GR AMS36873783VSP3003560VSP14003040VSP39403960 -
Lithostratigraphy
Lithostratigraphy Top depth [mMD RKB]Lithostrat. unit145716923210721072197224723772442357535813581368239403940 -
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]pdf12.63 -
Drilling mud
Drilling mud Depth MD [m]Mud weight [g/cm3]Visc. [mPa.s]Yield point [Pa]Mud typeDate measured1991.05WATER BASED15.10.19912311.05WATER BASED15.10.19914221.05WATER BASED17.10.19918631.05WATER BASED18.10.199110171.20WATER BASED18.10.199110171.20WATER BASED21.10.199110170.00WATER BASED21.10.199110171.08WATER BASED22.10.199110171.20WATER BASED21.10.199111951.1010.05.0WATER BASED23.10.199114581.3817.010.0WATER BASED24.10.199117401.4014.09.0WATER BASED25.10.199122061.4015.010.0WATER BASED29.10.199122641.4118.012.0WATER BASED29.10.199124571.4023.011.0WATER BASED29.10.199127221.3926.013.0WATER BASED31.10.199127421.4021.012.0WATER BASED01.11.199127451.4018.012.0WATER BASED04.11.199127941.4026.012.0WATER BASED04.11.199129061.4624.010.0WATER BASED04.11.199129661.4025.013.0WATER BASED05.11.199130261.4025.010.0WATER BASED06.11.199130701.4026.014.0WATER BASED08.11.199130701.3926.013.0WATER BASED12.11.199130701.4025.013.0WATER BASED07.11.199130701.4022.013.0WATER BASED12.11.199130701.4023.011.0WATER BASED12.11.199130701.4023.09.0WATER BASED12.11.199131121.3420.010.0WATER BASED13.11.199131651.3223.010.0WATER BASED14.11.199133261.3020.010.0WATER BASED15.11.199134121.3722.011.0WATER BASED19.11.199135301.4126.09.0WATER BASED19.11.199135411.4020.011.0WATER BASED19.11.199135871.4019.010.0WATER BASED19.11.199135871.3916.09.0WATER BASED20.11.199136321.4018.010.0WATER BASED21.11.199136891.4117.07.0WATER BASED22.11.199137121.4119.09.0WATER BASED25.11.199138191.4020.011.0WATER BASED25.11.199139741.4019.012.0WATER BASED25.11.199139861.4016.09.0WATER BASED26.11.199139861.4017.09.0WATER BASED27.11.199139861.4015.06.0WATER BASED28.11.199139861.4021.08.0WATER BASED02.12.199139861.4021.07.0WATER BASED29.11.199139861.4021.011.0WATER BASED02.12.1991 -
Palynological slides at the Norwegian Offshore Directorate
Palynological slides at the Norwegian Offshore Directorate Sample depthDepth unitSample typeLaboratory1130.0[m]DCSPT1160.0[m]DCSPT1190.0[m]DCSPT1220.0[m]DCSPT1250.0[m]DCSPT1280.0[m]DCSPT1310.0[m]DCSPT1340.0[m]DCSPT1370.0[m]DCSPT1400.0[m]DCSPT1430.0[m]DCSPT1460.0[m]DCSPT1490.0[m]DCSPT1520.0[m]DCSPT1550.0[m]DCSPT1580.0[m]DCSPT1610.0[m]DCSPT1640.0[m]DCSPT1670.0[m]DCSPT1700.0[m]DCSPT1730.0[m]DCSPT1760.0[m]DCSPT1790.0[m]DCSPT1820.0[m]DCSPT1850.0[m]DCSPT1880.0[m]DCSPT1910.0[m]DCSPT1940.0[m]DCSPT2030.0[m]DCSPT2060.0[m]DCSPT2120.0[m]DCSPT2130.0[m]DCSPT2150.0[m]DCSPT2170.0[m]DCSPT2180.0[m]DCSPT2210.0[m]DCSPT2230.0[m]DCSPT2240.0[m]DCSPT2270.0[m]DCSPT2300.0[m]DCSPT2320.0[m]DCSPT2330.0[m]DCSPT2350.0[m]DCSPT2360.0[m]DCSPT2390.0[m]DCSPT2410.0[m]DCSPT2420.0[m]DCSPT2440.0[m]DCSPT2450.0[m]DCSPT2470.0[m]DCSPT2480.0[m]DCSPT2500.0[m]DCSPT2510.0[m]DCSPT2525.0[m]DCSPT2540.0[m]DCSPT2555.0[m]DCSPT2570.0[m]DCSPT2600.0[m]DCSPT2615.0[m]DCSPT2630.0[m]DCSPT2645.0[m]DCSPT2675.0[m]DCSPT2720.0[m]DCSPT2735.0[m]DCSPT2750.0[m]DCSPT2765.0[m]DCSPT2780.0[m]DCSPT2795.0[m]DCSPT2810.0[m]DCSPT2825.0[m]DCSPT2840.0[m]DCSPT2855.0[m]DCSPT2870.0[m]DCSPT2885.0[m]DCSPT2900.0[m]DCSPT2915.0[m]DCSPT2930.0[m]DCSPT2945.0[m]DCSPT2960.0[m]DCSPT2975.0[m]DCSPT2990.0[m]DCSPT3005.0[m]DCSPT3020.0[m]DCSPT3035.0[m]DCSPT3050.0[m]DCSPT3065.0[m]DCSPT3095.0[m]DCSPT3260.0[m]DCSPT3275.0[m]DCSPT3290.0[m]DCSPT3305.0[m]DCSPT3320.0[m]DCSPT3335.0[m]DCSPT3350.0[m]DCSPT3365.0[m]DCSPT3380.0[m]DCSPT3395.0[m]DCSPT3410.0[m]DCSPT3425.0[m]DCSPT3440.0[m]DCSPT3455.0[m]DCSPT3472.0[m]DCSPT3485.0[m]DCSPT3500.0[m]DCSPT3515.0[m]DCSPT3527.0[m]DCSPT3547.0[m]DCSPT3575.0[m]DCSPT3580.0[m]DCSPT3582.0[m]DCSPT3585.0[m]DCSPT3590.0[m]DCSPT3600.0[m]DCSPT3602.0[m]DCSPT3605.0[m]DCSPT3615.0[m]DCSPT3625.0[m]DCSPT3635.0[m]DCSPT3645.0[m]DCSPT3655.0[m]DCSPT3665.0[m]DCSPT3675.0[m]DCSPT3683.7[m]CHYDRO3685.0[m]DCSPT3686.0[m]CHYDRO3689.5[m]CHYDRO3691.8[m]CHYDRO3691.9[m]CHYDRO3696.5[m]CHYDRO3704.5[m]CHYDRO3707.3[m]CHYDRO3707.8[m]CHYDRO3709.9[m]CHYDRO3745.0[m]DCSPT3755.0[m]DCSPT3765.0[m]DCSPT3775.0[m]DCSPT3785.0[m]DCSPT3795.0[m]DCSPT3805.0[m]DCSPT3815.0[m]DCSPT3825.0[m]DCSPT3835.0[m]DCSPT3845.0[m]DCSPT3855.0[m]DCSPT3865.0[m]DCSPT3875.0[m]DCSPT3885.0[m]DCSPT3905.0[m]DCSPT3915.0[m]DCSPT3927.0[m]DCSPT3935.0[m]DCSPT3947.0[m]DCSPT3955.0[m]DCSPT3965.0[m]DCSPT