6406/5-1
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General information
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Wellbore history
GeneralWell 6406/5-1 was drilled on the Halten Terrace, on a structure south of the Kristin field. The objective of well 6406/5-1 was to test and sample the Middle-Lower Jurassic Garn, Ile and Tofte Formations.Operations and resultsWildcat well 6406/5-1 was spudded on 23 December 2001 in 286 m water depth with the semi-submersible installation Transocean Winner and drilled to TD at 4692 m in the Early Jurassic Tilje Formation. The well encountered a kick immediately below the base of the Tertiary at 2600 m where hydrocarbons flowed to the surface. An unexpected highly pressured sandy interval of the Springar Formation contained fluid hydrocarbons. Due to problems stabilizing the well bore, the well was technically sidetracked from the 16" casing at 1435 m. The well was drilled with spud mud down to 1434 m, with KCl/PAC/glycol mud from 1434 m to 2691 m, and with Versapro oil based mud from 2691 m to TD.The well found a 41 m hydrocarbon column in the Garn Formation. From MDT sampling the fluid was interpreted to be a rich gas/condensate with a GOR of 373 Sm3/Sm3. However, the reservoir MDT sample was estimated to have a mud contamination of 49%. Estimation of the uncontaminated reservoir fluid composition and the reservoir fluid properties using equations of state (EOS) gave a GOR of 486 Sm3/Sm3. The Ile and Tofte reservoirs were water bearing, but the cores showed fluorescence. All three prognosed reservoirs were encountered with porosities in the range of 7% to 29%.A total of 97 m core was recovered in five cores, one core from the Garn Formation, two cores from the Ile Formation, and two cores from the Tofte Formation. MDT pressures were taken from all reservoirs and fluid samples taken from the Ile and the Garn reservoirs. The pressure measurements at the top of the Garn Formation confirmed the predicted high pressure in the reservoir. The measured pressure was 777 bar.The well was plugged and abandoned on 30 April 2002 as a gas/condensate discovery.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]1440.002590.00 -
Cores at the Norwegian Offshore Directorate
Cores at the Norwegian Offshore Directorate Core sample numberCore sample - top depthCore sample - bottom depthCore sample depth - uom14230.04254.4[m ]24342.04366.1[m ]34377.04401.5[m ]44495.04496.5[m ]54499.04522.5[m ]Cores at the Norwegian Offshore Directorate Total core sample length [m]98.0Cores at the Norwegian Offshore Directorate Cores available for sampling?YES -
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 typeCONDUCTOR30359.036360.00.00LOTINTERM.201399.0261400.01.84LOTINTERM.162254.0182260.01.86LOTINTERM.13 3/82654.017 1/22660.01.87LOTINTERM.9 5/84073.012 1/44075.00.00LOTOPEN HOLE4692.08 1/24692.00.00LOT -
Logs
Logs Log typeLog top depth [m]Log bottom depth [m]AIT DSI GR41094645ASI GR22274090CSI GR39694635CST GR41184655ECRD ACTS IPLT AIT41064501EMS GR ACTS14351899EMS GR GPIT DSI22812683IPLT41094670IPLT AIT DSI26834122MDT GR41084237MDT GR42104681MDT GR42364486MDT GR43364497MWD - CDR RES GR3122600MWD - CDR RES GR26914692MWD - DIR14252361PEX HALS HNGS22812691 -
Lithostratigraphy
Lithostratigraphy Top depth [mMD RKB]Lithostrat. unit3121452191019102459245925842584269328723377337733854060407240724077420542054272433544434443448745804628 -
Composite logs
Composite logs Document nameDocument formatDocument size [MB]pdf0.60 -
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].pdf2.91.pdf7.77 -
Drilling mud
Drilling mud Depth MD [m]Mud weight [g/cm3]Visc. [mPa.s]Yield point [Pa]Mud typeDate measured3851.05SPUD MUD10921.05SPUD MUD11221.8431.0POLYMER12871.05SPUD MUD12971.8431.0POLYMER14341.5023.0KCL/PAC/GLYCOL15331.5418.0KCL/PAC/GLYCOL16161.4820.0KCL/PAC/GLYCOL22771.5831.0KCL/PAC/GLYCOL22801.5831.0KCL/PAC/GLYCOL23601.5030.0KCL/PAC/GLYCOL23641.7540.0KCL/PAC/GLYCOL25521.7835.0KCL/PAC/GLYCOL26001.6428.0KCL/PAC/GLYCOL26911.8233.0KCL/PAC/GLYCOL28301.7846.0OIL (ENVIRON)39011.8772.0OIL (ENVIRON)41151.8754.0OIL (ENVIRON)41491.9758.0OIL (ENVIRON)42301.9756.0OIL (ENVIRON)43131.9758.0OIL (ENVIRON)43721.9754.0OIL (ENVIRON)43781.9758.0OIL (ENVIRON)44011.9759.0OIL (ENVIRON)44341.9754.0OIL (ENVIRON)44961.9756.0OIL (ENVIRON)45231.9752.0OIL (ENVIRON)46921.9053.0OIL (ENVIRON) -
Palynological slides at the Norwegian Offshore Directorate
Palynological slides at the Norwegian Offshore Directorate Sample depthDepth unitSample typeLaboratory1470.0[m]DCICHRON1500.0[m]DCICHRON1520.0[m]DCICHRON1550.0[m]DCICHRON1610.0[m]DCICHRON1640.0[m]DCICHRON1670.0[m]DCICHRON1700.0[m]DCICHRON1730.0[m]DCICHRON1760.0[m]DCICHRON1820.0[m]DCICHRON1850.0[m]DCICHRON1880.0[m]DCICHRON1910.0[m]DCICHRON1940.0[m]DCICHRON1950.0[m]DCICHRON1960.0[m]DCICHRON1970.0[m]DCICHRON1970.0[m]DCICHRON1980.0[m]DCICHRON1990.0[m]DCICHRON2000.0[m]DCICHRON2010.0[m]DCICHRON2020.0[m]DCICHRON2030.0[m]DCICHRON2040.0[m]DCICHRON2050.0[m]DCICHRON2060.0[m]DCICHRON2070.0[m]DCICHRON2080.0[m]DCICHRON2090.0[m]DCICHRON2100.0[m]DCICHRON2110.0[m]DCICHRON2120.0[m]DCICHRON2130.0[m]DCICHRON2140.0[m]DCICHRON2150.0[m]DCICHRON2160.0[m]DCICHRON2170.0[m]DCICHRON2190.0[m]DCICHRON2210.0[m]DCICHRON2220.0[m]DCICHRON2240.0[m]DCICHRON2250.0[m]DCICHRON2270.0[m]DCICHRON2280.0[m]DCICHRON2290.0[m]DCICHRON2300.0[m]DCICHRON2310.0[m]DCICHRON2340.0[m]DCICHRON2350.0[m]DCICHRON2360.0[m]DCICHRON2370.0[m]DCICHRON2390.0[m]DCICHRON2400.0[m]DCICHRON2410.0[m]DCICHRON2420.0[m]DCICHRON2430.0[m]DCICHRON2440.0[m]DCICHRON2450.0[m]DCICHRON2460.0[m]DCICHRON2470.0[m]DCICHRON2480.0[m]DCICHRON2490.0[m]DCICHRON2500.0[m]DCICHRON2510.0[m]DCICHRON2520.0[m]DCICHRON2530.0[m]DCICHRON2540.0[m]DCICHRON2550.0[m]DCICHRON2560.0[m]DCICHRON2570.0[m]DCICHRON2580.0[m]DCICHRON2589.0[m]DCICHRON2601.0[m]DCICHRON2610.0[m]DCICHRON2619.0[m]DCICHRON2630.0[m]DCICHRON2640.0[m]DCICHRON2650.0[m]DCICHRON2660.0[m]DCICHRON2670.0[m]DCICHRON2680.0[m]DCICHRON2690.0[m]DCICHRON2710.0[m]DCICHRON2740.0[m]DCICHRON2770.0[m]DCICHRON2800.0[m]DCICHRON2820.0[m]DCICHRON2840.0[m]DCICHRON2870.0[m]DCICHRON2890.0[m]DCICHRON2910.0[m]DCICHRON2930.0[m]DCICHRON2940.0[m]DCICHRON2960.0[m]DCICHRON2970.0[m]DCICHRON2980.0[m]DCICHRON2990.0[m]DCICHRON3020.0[m]DCICHRON3040.0[m]DCICHRON3060.0[m]DCICHRON3080.0[m]DCICHRON3100.0[m]DCICHRON3120.0[m]DCICHRON3130.0[m]DCICHRON3160.0[m]DCICHRON3170.0[m]DCICHRON3190.0[m]DCICHRON3210.0[m]DCICHRON3220.0[m]DCICHRON3240.0[m]DCICHRON3250.0[m]DCICHRON3260.0[m]DCICHRON3280.0[m]DCICHRON3300.0[m]DCICHRON3310.0[m]DCICHRON3320.0[m]DCICHRON3330.0[m]DCICHRON3340.0[m]DCICHRON3350.0[m]DCICHRON3360.0[m]DCICHRON3380.0[m]DCICHRON3390.0[m]DCICHRON3410.0[m]DCICHRON3420.0[m]DCICHRON3440.0[m]DCICHRON3450.0[m]DCICHRON3460.0[m]DCICHRON3480.0[m]DCICHRON3490.0[m]DCICHRON3510.0[m]DCICHRON3520.0[m]DCICHRON3540.0[m]DCICHRON3550.0[m]DCICHRON3570.0[m]DCICHRON3590.0[m]DCICHRON3600.0[m]DCICHRON3770.0[m]DCICHRON3790.0[m]DCICHRON3820.0[m]DCICHRON3830.0[m]DCICHRON3850.0[m]DCICHRON3860.0[m]DCICHRON3950.0[m]DCICHRON3960.0[m]DCICHRON3970.0[m]DCICHRON4006.0[m]DCICHRON4014.0[m]DCICHRON4023.0[m]DCICHRON4032.0[m]DCICHRON4041.0[m]DCICHRON4068.0[m]DCICHRON4071.0[m]DCICHRON4074.0[m]DCICHRON4083.0[m]DCICHRON4092.0[m]DCICHRON4100.0[m]DCICHRON4110.0[m]DCICHRON4122.0[m]DCICHRON4134.0[m]DCICHRON4146.0[m]DCICHRON4155.0[m]DCICHRON4167.0[m]DCICHRON4179.0[m]DCICHRON4197.0[m]DCICHRON4206.0[m]DCICHRON4209.0[m]DCICHRON4220.0[m]DCICHRON4230.0[m]DCICHRON4231.6[m]CICHRON4234.4[m]CICHRON4236.5[m]CICHRON4237.0[m]CICHRON4239.7[m]CICHRON4250.5[m]CICHRON4251.7[m]CICHRON4269.0[m]DCICHRON4278.0[m]DCICHRON4287.0[m]DCICHRON4296.0[m]DCICHRON4305.0[m]DCICHRON4314.0[m]DCICHRON4323.0[m]DCICHRON4332.0[m]DCICHRON4335.0[m]DCICHRON4347.0[m]CICHRON4350.1[m]CICHRON4352.1[m]CICHRON4355.4[m]CICHRON4356.6[m]CICHRON4359.1[m]CICHRON4361.0[m]CICHRON4363.9[m]CICHRON4364.7[m]CICHRON4378.0[m]CICHRON4380.7[m]CICHRON4385.0[m]CICHRON4389.7[m]CICHRON4393.7[m]CICHRON4400.0[m]CICHRON4401.4[m]CICHRON4424.0[m]DCICHRON4443.0[m]DCICHRON4452.0[m]DCICHRON4464.0[m]DCICHRON4476.0[m]SWCICHRON4486.0[m]SWCICHRON4493.5[m]SWCICHRON4516.0[m]CICHRON4519.0[m]CICHRON4521.0[m]DCICHRON4522.5[m]CICHRON4530.0[m]DCICHRON4530.0[m]SWCICHRON4540.0[m]SWCICHRON4556.5[m]SWCICHRON4566.0[m]DCICHRON4568.0[m]SWCICHRON4578.0[m]DCICHRON4580.0[m]SWCICHRON4590.0[m]DCICHRON4617.0[m]DCICHRON4635.0[m]SWCICHRON4642.0[m]SWCICHRON4644.0[m]DCICHRON4650.0[m]SWCICHRON4656.0[m]DCICHRON4677.0[m]DCICHRON