35/3-5
Export: PDF
-
General information
-
Wellbore history
GeneralWell 35/3-5 is located ca 13 km south of the Agat Discovery. The primary target of the well was sandstones of Early Cretaceous age, which had been found hydrocarbon bearing in the 35/3-2 and 35/3-4 wells. The well was considered a wildcat due to the uncertain correlation between sand bodies in the area. The secondary objective was to penetrate sandstones of Middle - Early Jurassic age, which had been found hydrocarbon bearing in 35/3-2.The well is Reference well for the Agat Formation.Operations and resultsExploration well 35/3-5 was spudded with the semi-submersible installation West Venture on 22 December 1981 and drilled to TD at 4114 m in Basement rocks. The well was respudded two times due to boulders. Shallow gas caused problems with cementing and caused a leak outside of the casing. The leak was repaired and further operations were performed without any specific problems. The well was drilled with seawater and hi-vis pills down to 420 m, with seawater/gel mud from 420 m to 1046 m, with gypsum/polymer mud from 1046 m to 2052 m, and with lignosulphonate mud from 2052 m to TD.The Agat Formation was encountered from 3219 m to 3620 m. A thin Intra Heather sandstone was penetrated from 3865 m to 3874 m. A minor show was noted at the top of the Agat Formation. Minor oil shows with associated formation gas peaks were recorded in sandstones at 3547 m and 3568 m. Minor shows were recorded in siltstones below 3685 m, but these were not associated with gas peaks. Organic geochemical analyses confirmed migrant hydrocarbons at 3223 m in the top of the Agat Formation. Source rocks were immature down to about 3000 m. Oil window maturity is postulated below ca 3900 m. Below ca 3300 m in the well total organic carbon was found in the range 1.7 % to 3 % in picked mud stone samples. Shale in a thin interval at 3286 m to 3295 m was evaluated as a good/rich potential as a source rock for gas and oil while claystone/siltstone from 3847 m to 4063 had fair/good potential as a source rock for gas and some paraffinic oil. Four cores were cut in the interval 3227.6 m to 3292.1 m in the Agat Formation (log depth ca 4 m deeper for all cores). A fifth core was attempted in the Heather Formation, but this core had no recovery. An RFT fluid sample at 3243 m recovered only water and mud filtrate.The well was plugged and abandoned as a dry hole with weak 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]430.004111.00 -
Cores at the Norwegian Offshore Directorate
Cores at the Norwegian Offshore Directorate Core sample numberCore sample - top depthCore sample - bottom depthCore sample depth - uom13227.73245.2[m ]23245.23257.6[m ]33257.13274.6[m ]43274.73292.1[m ]Cores at the Norwegian Offshore Directorate Total core sample length [m]64.9Cores at the Norwegian Offshore Directorate Cores available for sampling?YES -
Core photos
-
Palynological slides at the Norwegian Offshore Directorate
Palynological slides at the Norwegian Offshore Directorate Sample depthDepth unitSample typeLaboratory600.0[m]DCGEOCH630.0[m]DCGEOCH660.0[m]DCGEOCH690.0[m]DCGEOCH720.0[m]DCGEOCH750.0[m]DCGEOCH780.0[m]DCGEOCH870.0[m]DCGEOCH920.0[m]DCGEOCH940.0[m]DCGEOCH970.0[m]DCGEOCH980.0[m]DCGEOCH1000.0[m]DCROBERTSO1010.0[m]DCROBETRSO1010.0[m]DCGEOCH1020.0[m]DCGEOCH1020.0[m]DCROBERTSO1030.0[m]DCROBERTSO1040.0[m]DCROBERTSO1050.0[m]DCROBERTSO1060.0[m]DCROBERTSO1060.0[m]DCGEOCH1070.0[m]DCROBERTSO1080.0[m]DCROBERTSO1090.0[m]DCROBERTSO1090.0[m]DCGEOCH1100.0[m]DCROBERTSO1110.0[m]DCROBERTSO1120.0[m]DCROBERTSO1120.0[m]DCGEOCH1130.0[m]DCROBERTSO1140.0[m]DCROBERTSO1150.0[m]DCGEOCH1180.0[m]DCROBERTSO1190.0[m]DCROBERTSO1200.0[m]DCROBERTSO1210.0[m]DCROBERTSO1220.0[m]DCROBERTSO1230.0[m]DCROBERTSO1230.0[m]DCGEOCH1240.0[m]DCROBERTSO1250.0[m]DCROBERTSO1260.0[m]DCROBERTSO1270.0[m]DCROBERTSO1270.0[m]DCGEOCH1280.0[m]DCROBERTSO1290.0[m]DCROBERTSO1290.0[m]DCGEOCH1300.0[m]DCROBERTSO1310.0[m]DCROBERTSO1320.0[m]DCROBERTSO1330.0[m]DCROBERTSO1340.0[m]DCROBERTSO1350.0[m]DCROBERTSO1360.0[m]DCROBERTSO1370.0[m]DCROBERTSO1380.0[m]DCROBERTSO1380.0[m]DCGEOCH1390.0[m]DCROBERTSO1400.0[m]DCROBERTSO1410.0[m]DCGEOCH1420.0[m]DCRRI1430.0[m]DCGEOCH1440.0[m]DCRRI1460.0[m]DCRRI1480.0[m]DCRRI1500.0[m]DCRRI1520.0[m]DCRRI1540.0[m]DCRRI1560.0[m]DCRRI1580.0[m]DCRRI1600.0[m]DCRRI1620.0[m]DCRRI1640.0[m]DCRRI1660.0[m]DCRRI1680.0[m]DCRRI1700.0[m]DCRRI1720.0[m]DCRRI1740.0[m]DCRRI1760.0[m]DCRRI1780.0[m]DCRRI1800.0[m]DCRRI1820.0[m]DCRRI1840.0[m]DCRRI1860.0[m]DCRRI1880.0[m]DCRRI1900.0[m]DCRRI1920.0[m]DCROBERT1940.0[m]DCRRI1960.0[m]DCRRI1980.0[m]DCRRI2000.0[m]DCRRI2020.0[m]DCRRI2040.0[m]DCRRI2060.0[m]DCRRI2080.0[m]DCRRI2100.0[m]DCRRI2120.0[m]DCRRI2140.0[m]DCRRI2160.0[m]DCRRI2180.0[m]DCRRI2200.0[m]DCRRI2220.0[m]DCRRI2240.0[m]DCRRI2260.0[m]DCRRI2280.0[m]DCRRI2300.0[m]DCRRI2320.0[m]DCRRI2335.0[m]DCRRI2340.0[m]DCRRI2350.0[m]DCRRI2360.0[m]DCRRI2365.0[m]DCRRI2380.0[m]DCRRI2395.0[m]DCRRI2400.0[m]DCRRI2410.0[m]DCRRI2415.0[m]DCRRI2425.0[m]DCRRI2430.0[m]DCRRI2440.0[m]DCRRI2460.0[m]DCRRI2480.0[m]DCRRI2500.0[m]DCRRI2520.0[m]DCRRI2535.0[m]DCRRI2560.0[m]DCRRI2580.0[m]DCRRI2600.0[m]DCRRI2620.0[m]DCRRI2640.0[m]DCRRI2660.0[m]DCRRI2680.0[m]DCRRI2700.0[m]DCRRI2720.0[m]DCRRI2740.0[m]DCRRI2760.0[m]DCRRI2780.0[m]DCRRI2800.0[m]DCRRI2818.0[m]DCRRI2833.0[m]DCRRI2878.0[m]DCRRI2893.0[m]DCRRI2908.0[m]DCRRI2928.0[m]DCRRI2938.0[m]DCRRI2953.0[m]DCRRI2968.0[m]DCRRI2983.0[m]DCRRI2998.0[m]DCRRI3013.0[m]DCRRI3028.0[m]DCRRI3043.0[m]DCRRI3058.0[m]DCRRI3073.0[m]DCRRI3088.0[m]DCRRI3103.0[m]DCRRI3118.0[m]DCRRI3130.0[m]DCRRI3133.0[m]DCRRI3148.0[m]DCRRI3160.0[m]DCRRI3190.0[m]DCRRI3215.0[m]SWCOD3220.0[m]DCRRI3224.0[m]SWCRRI3227.5[m]COD3229.1[m]COD3229.1[m]CRRI3229.2[m]COD3229.2[m]COD3231.6[m]COD3233.2[m]COD3233.3[m]CRRI3233.9[m]COD3235.0[m]DCRRI3236.3[m]COD3236.3[m]COD3236.5[m]CRRI3236.6[m]COD3239.2[m]COD3240.7[m]COD3241.8[m]COD3241.9[m]COD3243.5[m]COD3249.1[m]COD3249.5[m]CRRI3250.0[m]DCRRI3250.4[m]COD3250.4[m]COD3252.0[m]COD3253.9[m]COD3254.9[m]COD3254.9[m]COD3255.7[m]COD3257.1[m]COD3257.2[m]COD3257.2[m]CRRI3257.6[m]COD3258.9[m]COD3259.7[m]COD3260.0[m]COD3260.1[m]CRRI3260.5[m]COD3260.8[m]COD3261.9[m]COD3262.5[m]COD3264.0[m]COD3264.5[m]COD3265.0[m]DCSTATOIL3265.7[m]COD3266.9[m]COD3266.9[m]COD3266.9[m]CRRI3267.5[m]COD3269.0[m]COD3269.0[m]COD3270.2[m]CRRI3270.5[m]COD3270.5[m]COD3271.7[m]COD3271.7[m]COD3272.8[m]COD3273.8[m]COD3273.9[m]COD3274.4[m]COD3274.5[m]CRRI3275.3[m]COD3275.4[m]COD3275.9[m]CRRI3276.3[m]COD3276.7[m]COD3277.0[m]CRRI3277.1[m]COD3277.1[m]COD3278.2[m]COD3278.3[m]COD3278.3[m]COD3280.0[m]DCRRI3280.0[m]CRRI3280.2[m]COD3281.7[m]COD3283.4[m]COD3284.9[m]COD3285.0[m]CRRI3285.0[m]COD3285.7[m]COD3285.8[m]COD3287.5[m]COD3287.6[m]COD3288.1[m]CRRI3288.3[m]CRRI3288.5[m]COD3288.5[m]COD3288.7[m]COD3290.5[m]COD3291.9[m]CRRI3292.0[m]COD3292.1[m]CRRI3294.0[m]SWCRRI3295.0[m]DCRRI3310.0[m]DCRRI3319.0[m]SWCRRI3330.0[m]SWCRRI3330.0[m]CRRI3331.0[m]DCRRI3340.0[m]DCRRI3346.0[m]DCRRI3361.0[m]DCRRI3363.0[m]SWCRRI3368.0[m]SWCRRI3370.0[m]DCRRI3376.0[m]DCRRI3381.0[m]SWCRRI3391.0[m]DCRRI3400.0[m]DCRRI3406.0[m]DCRRI3421.0[m]DCRRI3430.0[m]DCRRI3432.5[m]SWCRRI3436.0[m]DCRRI3447.5[m]SWCRRI3451.0[m]DCRRI3457.5[m]SWCRRI3460.0[m]DCRRI3466.0[m]DCRRI3481.0[m]DCRRI3490.0[m]DCRRI3496.0[m]DCRRI3500.5[m]SWCRRI3511.0[m]DCRRI3517.0[m]SWCRRI3520.0[m]DCRRI3526.0[m]DCRRI3533.0[m]SWCRRI3541.0[m]DCRRI3550.0[m]DCRRI3559.0[m]DCRRI3574.0[m]DCRRI3577.0[m]SWCRRI3580.0[m]DCRRI3589.0[m]DCRRI3604.0[m]DCRRI3610.0[m]DCRRI3612.0[m]SWCRRI3619.0[m]DCRRI3620.5[m]SWCRRI3634.0[m]DCRRI3637.5[m]SWCOD3640.0[m]DCRRI3649.0[m]DCRRI3654.5[m]SWCRRI3659.5[m]SWCOD3664.0[m]DCRRI3670.0[m]DCRRI3670.5[m]SWCRRI3672.5[m]SWCOD3679.0[m]DCOD3697.0[m]SWCRRI3697.0[m]SWCOD3701.5[m]SWCRRI3706.5[m]SWCOD3706.5[m]SWCOD3713.0[m]SWCRRI3730.5[m]SWCRRI3751.0[m]DCOD3754.5[m]SWCRRI3754.5[m]SWCOD3760.0[m]DCOD3760.0[m]SWCOD3769.0[m]DCOD3777.0[m]SWCRRI3781.0[m]DCOD3790.0[m]DCOD3793.5[m]SWCRRI3799.0[m]DCOD3802.0[m]SWCRRI3809.0[m]SWCOD3809.5[m]SWCOD3809.5[m]SWCRRI3811.0[m]DCOD3821.5[m]SWCRRI3828.5[m]SWCRRI3849.5[m]SWCRRI3854.5[m]SWCOD3861.5[m]SWCRRI3885.0[m]SWCRRI3885.0[m]SWCOD3900.0[m]SWCRRI3912.0[m]SWCOD3930.0[m]SWCRRI3956.0[m]SWCRRI3956.0[m]SWCOD3956.0[m]SWCOD3975.0[m]SWCRRI3995.0[m]SWCOD4008.5[m]SWCRRI4053.5[m]SWCRRI -
Lithostratigraphy
Lithostratigraphy Top depth [mMD RKB]Lithostrat. unit295593593975975102611001121114511721400142014201500256929042912318131813219351036393732373238653874395539553999405240604092 -
Composite logs
Composite logs Document nameDocument formatDocument size [MB]pdf0.73 -
Geochemical information
Geochemical information Document nameDocument formatDocument size [MB]pdf3.64 -
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]pdf3.15pdf0.88pdf2.08 -
Logs
Logs Log typeLog top depth [m]Log bottom depth [m]CBL VDL GR2921032CBL VDL GR2922041CBL VDL GR16803225CST24663410CST34294110FDC CNL GR10323719HDT34064113ISF BHC GR10322052ISF BHC GR CAL4101043ISF BHC MSFL GR20404112LDL CNL GR37004113NGS37004100RFT32233397RFT34823598SHDT20403412VELOCITY4754110 -
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 typeCONDUCTOR30410.036420.00.00LOTSURF.COND.201032.0261046.01.48LOTINTERM.13 3/82041.017 1/22052.01.66LOTINTERM.9 5/83406.012 1/43413.01.73LOTOPEN HOLE4114.08 1/24114.00.00LOT -
Drilling mud
Drilling mud Depth MD [m]Mud weight [g/cm3]Visc. [mPa.s]Yield point [Pa]Mud typeDate measured3080.00seawater8171.1142.0water based17711.1540.0water based20521.9358.0water based25251.1746.0water based30501.2244.0water based32451.2554.0water based40391.2950.0water based -
Thin sections at the Norwegian Offshore Directorate
Thin sections at the Norwegian Offshore Directorate DepthUnit3229.05[m ]3229.20[m ]3231.60[m ]3233.15[m ]3233.90[m ]3236.25[m ]3237.60[m ]3240.65[m ]3241.80[m ]3241.88[m ]3243.50[m ]3244.95[m ]3245.88[m ]3248.05[m ]3249.10[m ]3250.35[m ]3251.95[m ]3253.85[m ]3254.85[m ]3254.90[m ]3255.70[m ]3257.10[m ]3239.20[m ]3258.88[m ]3259.68[m ]3260.03[m ]3260.50[m ]3260.75[m ]3261.90[m ]3262.45[m ]3264.00[m ]3264.50[m ]3265.70[m ]3266.85[m ]3266.90[m ]3267.50[m ]3268.95[m ]3269.00[m ]3270.45[m ]3270.50[m ]3271.68[m ]3271.73[m ]3272.80[m ]3273.80[m ]3273.90[m ]3274.35[m ]3275.30[m ]3275.35[m ]3276.30[m ]3276.73[m ]3277.07[m ]3277.10[m ]3278.16[m ]3278.26[m ]3278.33[m ]3280.15[m ]3281.65[m ]3283.40[m ]3284.93[m ]3285.72[m ]3287.45[m ]3287.57[m ]3288.70[m ]3290.50[m ]3292.00[m ]3227.75[m ] -
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]pdf0.23