6506/11-1
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General information
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Wellbore history
GeneralWell 6506/11-1 was designed to prove hydrocarbons in the G-structure in the easternmost part of block 6506/11 close to Smørbukk Field. The primary purpose of the well was to prove significant hydrocarbon accumulations in the Middle-Early Jurassic reservoirs. Secondary targets were sands of Cretaceous age, especially the Lysing Formation that has been proven to be oil-bearing in the area. The well should also test the hypothesis of a western ultra-high pore pressure area, verify the geophysical and structural interpretation and to improve the geological, paleontological, and geochemical understanding of the area. Total depth was planned 200 m into the coal-bearing Åre Formation.Operations and resultsWildcat well 6506/11-1 was spudded with Smedvig Drilling semi-submersible installation Dyvi Delta on 30 December 1987 and drilled to TD at 4679 m in the Early Jurassic Åre Formation. The well was drilled with spud mud down to590 m, with gypsum/polymer mud from 590 m to 3500 m, and with Ligno/Lignite/Gel mud from 3500 m to TD. Shallow gas was present between 613 m and 618 m. The drilling generally went without problems. The Lysing Formation sandstone was thinner than expected in this location. It was water bearing with weak shows only. In the lower part of the Lange Formation an 85 m sequence of sandstone with poor porosity and interbedded claystones was encountered. Weak shows were recorded in the sandstones and the sequence proved to be gas-bearing. The Fangst Group prospect came in as prognosed, but did not indicate hydrocarbons except for poor to fair shows. Logs showed that it was water-bearing. High pressure was registered. This is typical for water-bearing holes on Haltenbanken. Four cores were cut in the well; two in the Garn Formation from 4140 m to 4195 m; one in the Ile Formation in the interval 4262 m to 4274 m; and one core in the Ror/Tilje Formations from 4477 m to 4504 m. No wire line fluid samples were taken. The well was permanently abandoned on 31 March 1988 as a well with shows.TestingOne DST test was performed in the lower Cretaceous, with perforated intervals 3727 m to 3730 m and 3741 m to 3745 m in the lower part of the Lange Formation. It produced 690 Sm3 gas / day through a 12.7 mm choke. Gas gravity was 0.645 (air =1) -
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]600.004677.00 -
Cores at the Norwegian Offshore Directorate
Cores at the Norwegian Offshore Directorate Core sample numberCore sample - top depthCore sample - bottom depthCore sample depth - uom14140.04167.5[m ]24167.54195.5[m ]34262.04273.5[m ]44483.04505.3[m ]Cores at the Norwegian Offshore Directorate Total core sample length [m]89.3Cores 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 typeLaboratory1890.0[m]DCSTRAT1910.0[m]DCSTRAT1920.0[m]DCSTRAT1940.0[m]DCSTRAT1950.0[m]DCSTRAT1970.0[m]DCSTRAT1980.0[m]DCSTRAT2000.0[m]DCSTRAT2010.0[m]DCSTRAT2020.0[m]DCSTRAT2060.0[m]DCSTRAT2070.0[m]DCSTRAT2090.0[m]DCSTRAT2110.0[m]DCSTRAT2120.0[m]DCSTRAT2130.0[m]DCSTRAT2150.0[m]DCSTRAT2170.0[m]DCSTRAT2202.0[m]SWCSTRAT2206.0[m]DCSTRAT2269.0[m]DCSTRAT2290.0[m]DCSTRAT2338.0[m]DCSTRAT2356.0[m]SWCSTRAT2356.0[m]DCSTRAT2365.0[m]DCSTRAT2400.0[m]DCSTRAT2418.0[m]DCSTRAT2427.0[m]DCSTRAT2445.0[m]DCSTRAT2455.0[m]SWCSTRAT2463.0[m]DCSTRAT2465.0[m]SWCSTRAT2481.0[m]DCSTRAT2499.0[m]DCSTRAT2517.0[m]DCSTRAT2526.0[m]DCSTRAT2544.0[m]DCSTRAT2562.0[m]DCSTRAT2580.0[m]DCSTRAT2616.0[m]DCSTRAT2634.0[m]DCSTRAT2652.0[m]DCSTRAT2670.0[m]DCSTRAT2685.0[m]DCSTRAT2700.0[m]DCSTRAT2712.0[m]DCSTRAT2716.0[m]DCSTRAT2724.0[m]DCSTRAT2748.0[m]DCSTRAT2763.0[m]SWCSTRAT2766.0[m]DCSTRAT2773.0[m]SWCSTRAT2778.0[m]DCSTRAT2796.0[m]DCSTRAT2808.0[m]DCSTRAT2826.0[m]DCSTRAT2838.0[m]DCSTRAT2856.0[m]DCSTRAT2868.0[m]DCSTRAT2886.0[m]DCSTRAT2898.0[m]DCSTRAT2928.0[m]DCSTRAT2946.0[m]DCSTRAT2958.0[m]DCSTRAT2976.0[m]DCSTRAT2988.0[m]DCSTRAT3018.0[m]DCSTRAT3036.0[m]DCSTRAT3048.0[m]DCSTRAT3066.0[m]DCSTRAT3078.0[m]DCSTRAT3096.0[m]DCSTRAT3108.0[m]DCSTRAT3136.0[m]SWCSTRAT3138.0[m]DCSTRAT3156.0[m]DCSTRAT3185.0[m]SWCSTRAT3198.0[m]DCSTRAT3207.0[m]SWCSTRAT3217.0[m]SWCSTRAT3228.0[m]DCSTRAT3250.0[m]SWCSTRAT3260.0[m]SWCSTRAT3276.0[m]DCSTRAT3288.0[m]DCSTRAT3306.0[m]DCSTRAT3318.0[m]DCSTRAT3336.0[m]DCSTRAT3348.0[m]DCSTRAT3366.0[m]DCSTRAT3378.0[m]DCSTRAT3396.0[m]DCSTRAT3408.0[m]DCSTRAT3426.0[m]DCSTRAT3438.0[m]DCSTRAT3456.0[m]DCSTRAT3468.0[m]DCSTRAT3486.0[m]DCSTRAT3498.0[m]DCSTRAT3546.0[m]DCSTRAT3558.0[m]DCSTRAT3576.0[m]DCSTRAT3588.0[m]DCSTRAT3606.0[m]DCSTRAT3618.0[m]DCSTRAT3636.0[m]DCSTRAT3648.0[m]DCSTRAT3666.0[m]DCSTRAT3678.0[m]DCSTRAT3696.0[m]DCSTRAT3710.0[m]SWCSTRAT3726.0[m]DCSTRAT3738.0[m]DCSTRAT3756.0[m]DCSTRAT3768.0[m]DCSTRAT3786.0[m]DCSTRAT3867.0[m]DCSTRAT3906.0[m]DCSTRAT3927.0[m]DCSTRAT3936.0[m]DCSTRAT3957.0[m]DCSTRAT3966.0[m]DCSTRAT3987.0[m]DCSTRAT3996.0[m]DCSTRAT4017.0[m]DCSTRAT4026.0[m]DCSTRAT4047.0[m]DCSTRAT4056.0[m]DCSTRAT4077.0[m]DCSTRAT4086.0[m]DCSTRAT4107.0[m]DCSTRAT4116.0[m]DCSTRAT4140.0[m]CSTRAT4146.0[m]DCSTRAT4147.0[m]CSTRAT4150.7[m]CSTRAT4153.7[m]CSTRAT4155.0[m]DCSTRAT4158.1[m]CSTRAT4161.5[m]CSTRAT4165.7[m]CSTRAT4166.3[m]CSTRAT4167.9[m]CSTRAT4170.5[m]CSTRAT4175.6[m]CSTRAT4179.7[m]CSTRAT4193.5[m]CSTRAT4227.0[m]DCSTRAT4245.0[m]DCSTRAT4264.0[m]CSTRAT4265.9[m]CSTRAT4268.2[m]CSTRAT4270.8[m]CSTRAT4287.0[m]DCSTRAT4305.0[m]DCSTRAT4317.0[m]DCSTRAT4335.0[m]DCSTRAT4347.0[m]DCSTRAT4365.0[m]DCSTRAT4377.0[m]DCSTRAT4392.0[m]DCSTRAT4404.0[m]DCSTRAT4425.0[m]DCSTRAT4437.0[m]DCSTRAT4455.0[m]DCSTRAT4467.0[m]DCSTRAT4476.0[m]DCSTRAT4477.0[m]CSTRAT4479.0[m]CSTRAT4479.5[m]CSTRAT4483.7[m]CSTRAT4487.9[m]CSTRAT4489.7[m]CSTRAT4493.0[m]CSTRAT4495.2[m]CSTRAT4505.2[m]CSTRAT4524.0[m]DCSTRAT4578.0[m]DCSTRAT4614.0[m]DCSTRAT4623.0[m]DCSTRAT4626.0[m]DCSTRAT4632.0[m]DCSTRAT4635.0[m]DCSTRAT4641.0[m]DCSTRAT4644.0[m]DCSTRAT4650.0[m]DCSTRAT4653.0[m]DCSTRAT4656.0[m]DCSTRAT4659.0[m]DCSTRAT4662.0[m]DCSTRAT4665.0[m]DCSTRAT4668.0[m]DCSTRAT4674.0[m]DCSTRAT4677.0[m]DCSTRAT -
Lithostratigraphy
Lithostratigraphy Top depth [mMD RKB]Lithostrat. unit275275146818891889206020602147219221922558291831593159321138133844384438624136413642144263436343634387444544854662 -
Composite logs
Composite logs Document nameDocument formatDocument size [MB]pdf0.76 -
Geochemical information
Geochemical information Document nameDocument formatDocument size [MB]pdf0.60 -
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]pdf13.72 -
Drill stem tests (DST)
Drill stem tests (DST) Test numberFrom depth MD
[m]To depth MD
[m]Choke size
[mm]1.0374137459.5Drill stem tests (DST) Test numberFinal shut-in pressure
[MPa]Final flow pressure
[MPa]Bottom hole pressure
[MPa]Downhole temperature
[°C]1.030.00020.000122Drill stem tests (DST) Test numberOil
[Sm3/day]Gas
[Sm3/day]Oil density
[g/cm3]Gas grav. rel.airGOR
[m3/m3]1.06900.645 -
Logs
Logs Log typeLog top depth [m]Log bottom depth [m]CARBON OXYGEN31503250CBL VDL2462067CBL VDL35804120CDL CN SPL GR20674118CDL SN SPL GR41204671DIEL- SPC31503250DIFL AC GR CDL CN20674132DIFL ACL GR41204678DIFL ACL GR CDL5842083HP FMT GR41504570HRDIP41214678MWD - GR RES ROP DIR2464679SWC21904034VSP6004640 -
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 typeCONDUCTOR30372.036372.00.00LOTSURF.COND.20586.026590.01.47LOTINTERM.13 3/82071.017 1/22088.01.87LOTINTERM.9 5/84124.012 1/44138.02.16LOTOPEN HOLE4679.08 1/24679.00.00LOT -
Drilling mud
Drilling mud Depth MD [m]Mud weight [g/cm3]Visc. [mPa.s]Yield point [Pa]Mud typeDate measured3251.03WATER BASED29.03.19883251.03WATER BASED30.03.19883250.00WATER BASED05.04.19883721.07WATER BASED04.01.19883871.03WATER BASED04.01.19884101.05WATER BASED04.01.19884561.03WATER BASED04.01.19884901.07WATER BASED05.01.19885301.4520.09.5WATER BASED28.03.19885601.03WATER BASED08.01.19885901.08WATER BASED06.01.19885901.08WATER BASED07.01.19886151.3012.04.5WATER BASED11.01.19886851.4518.04.0WATER BASED28.03.19887421.3012.04.5WATER BASED11.01.198811241.3015.05.5WATER BASED11.01.198811241.3014.04.5WATER BASED11.01.198813431.3014.05.0WATER BASED12.01.198815091.4015.05.0WATER BASED13.01.198820001.4518.05.0WATER BASED28.03.198820291.4016.07.5WATER BASED14.01.198820881.4517.06.5WATER BASED15.01.198820881.455200.07.0WATER BASED18.01.198820881.455100.06.0WATER BASED18.01.198820911.675900.012.0WATER BASED18.01.198823001.755400.06.0WATER BASED19.01.198823001.755200.07.0WATER BASED20.01.198823001.757000.017.5WATER BASED21.01.198823001.757000.013.0WATER BASED22.01.198823001.7522.014.0WATER BASED25.01.198823001.7522.012.0WATER BASED25.01.198823001.7524.011.0WATER BASED26.01.198823001.7524.013.0WATER BASED27.01.198823001.7528.014.0WATER BASED28.01.198823001.7527.014.0WATER BASED29.01.198823001.7525.027.0WATER BASED01.02.198823001.7524.013.5WATER BASED01.02.198823001.7526.014.0WATER BASED02.02.198823001.7526.012.5WATER BASED03.02.198823001.7532.011.0WATER BASED05.02.198823001.7526.08.0WATER BASED08.02.198823001.7522.06.0WATER BASED08.02.198823001.7526.08.0WATER BASED09.02.198823001.8026.09.0WATER BASED10.02.198823001.8023.08.0WATER BASED11.02.198823001.8027.08.0WATER BASED15.02.198823001.8029.08.0WATER BASED15.02.198823001.8026.07.0WATER BASED15.02.198823001.8027.09.0WATER BASED17.02.198823001.7526.07.0WATER BASED08.02.198823001.8029.08.0WATER BASED12.02.198823001.8025.08.0WATER BASED16.02.198823001.8025.07.5WATER BASED18.02.198831211.80WATER BASED24.03.198831211.8020.04.0WATER BASED25.03.198836991.8522.05.0WATER BASED22.03.198836991.8522.05.0WATER BASED21.03.198836991.8524.04.0WATER BASED24.03.198837271.9529.05.0WATER BASED21.03.198837271.9526.04.0WATER BASED21.03.198837681.7516.03.0WATER BASED09.03.198837701.7526.04.5WATER BASED14.03.198837701.8523.03.5WATER BASED14.03.198837701.8530.03.5WATER BASED15.03.198837701.8532.04.5WATER BASED16.03.198837701.9522.04.0WATER BASED17.03.198837701.9527.05.0WATER BASED18.03.198837701.7514.01.5WATER BASED14.03.198837771.7515.02.0WATER BASED10.03.198837771.7515.02.0WATER BASED11.03.198839561.8823.04.0WATER BASED08.03.198840501.8026.06.0WATER BASED19.02.198840501.8026.06.5WATER BASED22.02.198840501.8025.07.0WATER BASED22.02.198841381.8025.06.5WATER BASED22.02.198841381.8022.05.0WATER BASED23.02.198841501.8821.05.0WATER BASED07.03.198841501.8820.05.0WATER BASED07.03.198841671.8827.09.0WATER BASED29.02.198841671.8825.04.5WATER BASED29.02.198841671.8821.04.5WATER BASED29.02.198841671.8824.06.5WATER BASED01.03.198841671.8820.05.0WATER BASED02.03.198841671.8821.05.0WATER BASED03.03.198841681.8623.05.0WATER BASED24.02.198841681.8827.07.0WATER BASED26.02.198841951.8822.05.0WATER BASED25.02.1988 -
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]pdf0.29