33/9-3
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General information
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Wellbore history
GeneralWell 33/9-3 was drilled on the Statfjord structure on Tampen Spur in the northern North Sea, as a replacement well for the junk well 33/9-2. The primary objective was to provide seismic velocity control for detailed field mapping and to provide additional reservoir data for the Statfjord Field development.Operations and resultsWildcat well 33/9-3 was spudded with the semi-submersible installation Norskald on 15 September 1974 and drilled to TD at 2992 m in Late Triassic sediments of the Statfjord Group.The target reservoir Brent Group was encountered at 2411 m. It contained oil all through down to top Dunlin Group at 2599 m. The base of the reservoir was encountered above the oil water contact. The reservoir quality was excellent with average measured core porosity of 29% and measured permeabilities up to 7.7 Darcy.A total of 152 m core was recovered in 13 cores from the interval 2422.9 m to 2622.2 m in the reservoir section. Total core recovery was 76.1%. Six FIT fluid samples were taken at 2419 m (35.4 °API oil and mud filtrate), 2455 m (38.4 °API oil and mud filtrate), 2422 m (36.4 °API oil, gas and mud), 2423 m (36.6 °API oil and gas), 2534 m (35.6 °API oil and mud filtrate), and 2595 m (water, mud filtrate and trace oil).The well was permanently abandoned on 14 November as an oil appraisal well.TestingA DST over the interval 2479 to 2481 m did not produce fluids due to tool failure. -
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]2319.532987.00 -
Cores at the Norwegian Offshore Directorate
Cores at the Norwegian Offshore Directorate Core sample numberCore sample - top depthCore sample - bottom depthCore sample depth - uom17940.07960.0[ft ]28000.08006.0[ft ]38014.08048.0[ft ]48051.08109.0[ft ]58109.08135.0[ft ]68164.08224.0[ft ]78224.08246.6[ft ]88261.08309.0[ft ]98321.08346.3[ft ]108381.08432.0[ft ]118441.08498.0[ft ]128498.08555.0[ft ]138556.08596.3[ft ]Cores at the Norwegian Offshore Directorate Total core sample length [m]154.0Cores 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 typeCONDUCTOR30221.036221.00.00SURF.COND.20458.026471.00.00INTERM.13 3/8926.017 1/2941.00.00INTERM.9 5/82147.012 1/42159.00.00INTERM.2992.08 1/22992.00.00 -
Drill stem tests (DST)
Drill stem tests (DST) Test numberFrom depth MD
[m]To depth MD
[m]Choke size
[mm]1.0247924810.0Drill stem tests (DST) Test numberFinal shut-in pressure
[MPa]Final flow pressure
[MPa]Bottom hole pressure
[MPa]Downhole temperature
[°C]1.0Drill stem tests (DST) Test numberOil
[Sm3/day]Gas
[Sm3/day]Oil density
[g/cm3]Gas grav. rel.airGOR
[m3/m3]1.0 -
Logs
Logs Log typeLog top depth [m]Log bottom depth [m]BHC4602989CDM9262989DLL23322671FDC CNL9262989IES4592989VELOCITY4602989 -
Lithostratigraphy
Lithostratigraphy Top depth [mMD RKB]Lithostrat. unit171844926166216621705186023972405240524112411245825082540259925992644265528492973 -
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]pdf0.24pdf6.13pdf2.80pdf1.68pdf1.05pdf0.31pdf3.27pdf1.83 -
Drilling mud
Drilling mud Depth MD [m]Mud weight [g/cm3]Visc. [mPa.s]Yield point [Pa]Mud typeDate measured8371.08Waterbased13111.68Waterbased22811.80Waterbased29911.41Waterbased -
Palynological slides at the Norwegian Offshore Directorate
Palynological slides at the Norwegian Offshore Directorate Sample depthDepth unitSample typeLaboratory7850.0[ft]DCRRI7860.0[ft]DCRRI7870.0[ft]DCRRI7880.0[ft]DCRRI7890.0[ft]DCRRI7900.0[ft]DCRRI7910.0[ft]DCRRI7920.0[ft]DCRRI7945.0[ft]DCOD7945.0[ft]CLAP7948.0[ft]DCRRI8000.5[ft]CRRI8001.0[ft]CRRI8044.5[ft]CRRI8045.0[ft]CRRI8046.0[ft]CRRI8046.0[ft]DCRRI8051.5[ft]CRRI8052.0[ft]CGEOSTR8056.0[ft]CGEOSTR8059.0[ft]DCRRI8059.0[ft]CRRI8060.0[ft]CGEOSTR8078.0[ft]DCRRI8080.0[ft]CGEOSTR8082.0[ft]CRRI8084.0[ft]CGEOSTR8086.0[ft]DCRRI8093.0[ft]DCRRI8093.0[ft]CGEOSTR8097.0[ft]DCRRI8098.0[ft]CRRI8101.0[ft]DCRRI8102.0[ft]CGEOSTR8104.0[ft]CGEOSTR8110.0[ft]CGEOSTR8115.0[ft]CGEOSTR8118.0[ft]CGEOSTR8119.0[ft]CRRI8121.0[ft]CGEOSTR8127.0[ft]CGEOSTR8128.0[ft]CRRI8135.0[ft]CGEOSTR8164.0[ft]CGEOSTR8164.5[ft]CGEOSTR8166.0[ft]CRRI8166.5[ft]CRRI8175.0[ft]DCRRI8176.0[ft]CGEOSTR8182.0[ft]CGEOSTR8182.5[ft]CRRI8187.0[ft]DCRRI8188.0[ft]CGEOSTR8191.0[ft]CGEOSTR8198.0[ft]DCRRI8200.0[ft]CRRI8201.0[ft]CGEOSTR8218.0[ft]CRRI8219.5[ft]CRRI8220.0[ft]CGEOSTR8233.0[ft]DCRRI8235.0[ft]CRRI8236.0[ft]CGEOSTR8237.0[ft]CRRI8244.5[ft]CRRI8245.5[ft]CRRI8246.0[ft]CGEOSTR8262.0[ft]CRRI8262.3[ft]CRRI8286.0[ft]CRRI8333.0[ft]CRRI8334.0[ft]CRRI8524.0[ft]CRRI8538.0[ft]CRRI8540.0[ft]CRRI8550.0[ft]CRRI8551.0[ft]CRRI8553.0[ft]CRRI8554.5[ft]CRRI8557.0[ft]CRRI8558.0[ft]CRRI8559.0[ft]CRRI8561.4[ft]CRRI8570.0[ft]CRRI8582.0[ft]CRRI8593.0[ft]CRRI8595.0[ft]CRRI8600.0[ft]CRRI8610.0[ft]CRRI8650.0[ft]CRRI8660.0[ft]DCRRI8690.0[ft]CRRI8710.0[ft]DCRRI8730.0[ft]CRRI8770.0[ft]CRRI8770.0[ft]DCRRI8802.0[ft]DCOD8802.0[ft]CLAP8810.0[ft]CRRI8850.0[ft]CRRI8850.0[ft]DCRRI8890.0[ft]DCRRI8930.0[ft]CRRI8930.0[ft]DCRRI8970.0[ft]CRRI9010.0[ft]CRRI9010.0[ft]DCRRI9050.0[ft]CRRI9090.0[ft]CRRI9110.0[ft]DCRRI9130.0[ft]CRRI9170.0[ft]CRRI9190.0[ft]DCRRI9210.0[ft]CRRI9250.0[ft]CRRI9270.0[ft]DCRRI9290.0[ft]CRRI9330.0[ft]CRRI9350.0[ft]DCRRI9370.0[ft]DCRRI9420.0[ft]CRRI9430.0[ft]DCRRI9450.0[ft]CRRI9490.0[ft]CRRI9510.0[ft]DCRRI9530.0[ft]CRRI9570.0[ft]CRRI9590.0[ft]DCRRI9610.0[ft]CRRI9650.0[ft]CRRI9690.0[ft]CRRI9710.0[ft]DCRRI9730.0[ft]CRRI9760.0[ft]DCRRI9770.0[ft]CRRI9800.0[ft]DCRRI -
Thin sections at the Norwegian Offshore Directorate
Thin sections at the Norwegian Offshore Directorate DepthUnit8089.00[ft ]8462.00[ft ]8403.50[ft ]8556.50[ft ]8527.00[ft ]8331.00[ft ]