6607/5-2
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General information
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Wellbore history
Well 6607/5-2 was designed to drill the Amundsen II prospect on the NE-SW trending Bodø High. Block 6507/5 is located in the NW corner of the Nordland II, which is a geological province separated from the Halten and Dønna Terrace by the deep Træna Basin to the east. The main objective of the well was to test the hydrocarbon potential of the Middle-Lower Jurassic shallow marine sandstones. The prognosed formation pressure was supposed to follow the general behavior of the Haltenbanken Region, where a pressure regression might be experienced towards the Base Cretaceous at 4080 m. The objective Middle Jurassic sandstones were expected to exhibit a potentially high level of overpressure. No shallow gas warnings were given.Operations and resultsWildcat well 6607/5-2 was spudded on 7 August 1991 by the semi-submersible installation "Dyvi Stena" and completed 16 November 1991 at a total depth of 4684 m in intrusive rocks within the Upper Cretaceous Kvitnos Formation. Bentonite mud was used to 1225 m, water based KCl polymer mud was used from 1225 m to TD. There were no lost time accidents. The 523 m of water depth made this well the deepest well to date drilled on the Norwegian continental shelf. The well bore was maintained in excellent conditions over the entire well. Only 0.9 day of hole instability NPT was accumulated for this well. Throughout the well, immediate mud weight increase was made to counter excessive drag thus contributing to hole stability. During logging at TD, RFT results indicated a maximum pore pressure of 1.51 g/cm3. Following open hole logging of the 8 1/2" section, on request, the hole was plugged back and sidetracked at 3998 m RKB to permit a core cutting from 4161 - 4188.5 m in the Nise Formation sand, prior to resuming plug and abandon. No fluid samples were taken.The well did not penetrate the primary objective of Middle-Early Jurassic sandstones. The seismic reflectors interpreted as Jurassic turned out to be of Cretaceous age. This was considered to be the primary risk of the well from the start. Two Upper Cretaceous sandstone reservoir intervals (3748 - 3768 and 4167 - 4308 m) were encountered. Cutting samples indicated poor reservoir quality and since no shows were present, the well was drilled to TD. After TD was reached the well was sidetracked to obtain a core in the lower sandstone for sedimentological and diagenetic studies. Shows were not present in the core, and core analysis determined the permeability to be very poor. Wire line log interpretation indicated both sandstones to be water wet. It is possible that two dolerite intrusives, the first from 3793 - 3885 and the second from 4642 to TD at 4684 m have altered both sandstones. Minor fluorescence and cut were observed in five sidewall cores between 2564.5 and 2732.5 m. Weak, scattered shows were also present. The well was permanently plugged and abandoned as a dry well on 17 November 1991.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]1250.004683.00 -
Cores at the Norwegian Offshore Directorate
Cores at the Norwegian Offshore Directorate Core sample numberCore sample - top depthCore sample - bottom depthCore sample depth - uom14161.04188.3[m ]Cores at the Norwegian Offshore Directorate Total core sample length [m]27.3Cores 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 typeCONDUCTOR30584.036585.00.00LOTINTERM.201223.0261225.00.00LOTINTERM.13 3/82200.017 1/22202.00.00LOTINTERM.9 5/83690.012 1/43693.00.00LOTOPEN HOLE4684.08 1/24684.00.00LOT -
Logs
Logs Log typeLog top depth [m]Log bottom depth [m]CBL23003681CNL LDT GR36904684DIFL SP GR22003698DLL AS36904667DLL MSFL36904684DLL SP LSS CNL LDT GR12223700FMS IMAGE41494334FMS-DIP36904684FMS-IMAGE37273870MWD5484684RFT37524261SWC12402195SWC22343680SWC37304665VSP36004544 -
Lithostratigraphy
Lithostratigraphy Top depth [mMD RKB]Lithostrat. unit5492003231723172381238125882588370737924166430844224640 -
Composite logs
Composite logs Document nameDocument formatDocument size [MB]pdf0.77 -
Geochemical information
Geochemical information Document nameDocument formatDocument size [MB]pdf1.97 -
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]pdf6.98pdf28.26 -
Drilling mud
Drilling mud Depth MD [m]Mud weight [g/cm3]Visc. [mPa.s]Yield point [Pa]Mud typeDate measured2221.4021.0WATER BASED5861.04WATER BASED6201.04WATER BASED10101.05WATER BASED10531.05WATER BASED12351.05WATER BASED16001.2016.0WATER BASED18001.2910.0WATER BASED21101.336.0WATER BASED22151.3913.0WATER BASED22181.4920.0WATER BASED22211.4918.0WATER BASED23051.5623.0WATER BASED23401.5625.0WATER BASED25461.5622.0WATER BASED25791.5623.0WATER BASED28631.5620.0WATER BASED30271.5621.0WATER BASED31711.5618.0WATER BASED32121.5627.0WATER BASED32791.5618.0WATER BASED33201.5618.0WATER BASED33621.5620.0WATER BASED34331.5621.0WATER BASED35521.5621.0WATER BASED35771.56WATER BASED35861.5213.0WATER BASED36111.5618.0WATER BASED36911.5618.0WATER BASED37021.5620.0WATER BASED37131.5616.0WATER BASED37551.5814.0WATER BASED38131.5616.0WATER BASED38541.5616.0WATER BASED38691.5616.0WATER BASED38941.5615.0WATER BASED39471.5616.0WATER BASED40121.5616.0WATER BASED40141.5616.0WATER BASED40171.5616.0WATER BASED40271.5616.0WATER BASED40361.5616.0WATER BASED40471.5617.0WATER BASED40781.5618.0WATER BASED40931.5616.0WATER BASED41301.5618.0WATER BASED41491.5618.0WATER BASED41611.5618.0WATER BASED41791.5615.0WATER BASED41881.5618.0WATER BASED42811.5615.0WATER BASED42881.5616.0WATER BASED43301.5616.0WATER BASED43711.5617.0WATER BASED43771.5617.0WATER BASED43801.5617.0WATER BASED44571.5617.0WATER BASED45241.5616.0WATER BASED45791.5617.0WATER BASED46141.5616.0WATER BASED46311.5618.0WATER BASED46751.5617.0WATER BASED46841.5617.0WATER BASED -
Palynological slides at the Norwegian Offshore Directorate
Palynological slides at the Norwegian Offshore Directorate Sample depthDepth unitSample typeLaboratory1240.0[m]SWCSTRATLAB1270.0[m]SWCSTRATLAB1295.0[m]SWCSTRATLAB1333.0[m]SWCSTRATLAB1360.0[m]SWCSTRATLAB1399.0[m]SWCSTRATLAB1430.0[m]DCSTRATLAB1460.0[m]DCSTRATLAB1490.0[m]DCSTRATLAB1520.0[m]DCSTRATLAB1540.0[m]DCSTRATLAB1560.0[m]SWCSTRATLAB1590.0[m]DCSTRATLAB1616.5[m]SWCSTRATLAB1640.0[m]DCSTRATLAB1700.0[m]DCSTRATLAB1730.0[m]DCSTRATLAB1750.0[m]SWCSTRATLAB1780.0[m]DCSTRATLAB1802.0[m]SWCSTRATLAB1830.0[m]DCSTRATLAB1860.0[m]DCSTRATLAB1880.0[m]DCSTRATLAB1900.0[m]DC1930.0[m]SWC1960.0[m]DCSTRATLAB1985.0[m]SWC2000.0[m]SWC2010.0[m]DCSTRATLAB2020.0[m]SWC2050.0[m]DC2070.0[m]DCSTRATLAB2088.0[m]SWC2090.0[m]DCSTRATLAB2100.0[m]DCSTRATLAB2110.0[m]DCSTRATLAB2116.5[m]SWC2120.0[m]DCSTRATLAB2130.0[m]DCSTRATLAB2135.2[m]SWC2140.0[m]DCSTRATLAB2150.0[m]DCSTRATLAB2170.0[m]SWC2184.0[m]SWC2210.0[m]DC2210.0[m]DCSTRATLAB2234.0[m]SWCOD2240.0[m]CSTRATLAB2248.5[m]SWCSTRATLAB2255.0[m]SWCOD2270.0[m]DCSTRATLAB2282.0[m]SWCOD2295.0[m]DCSTRATLAB2304.0[m]SWCSTRATLAB2318.0[m]SWCOD2320.0[m]DCSTRATLAB2340.0[m]DCSTRATLAB2350.0[m]DCSTRATLAB2355.5[m]SWCOD2370.0[m]DCSTRATLAB2377.5[m]SWCSTRATLAB2380.0[m]DC2390.0[m]DCSTRATLAB2400.0[m]DCSTRATLAB2402.0[m]SWCOD2405.0[m]DCSTRATLAB2420.0[m]DCSTRATLAB2435.0[m]DCSTRATLAB2450.0[m]DCSTRATLAB2450.5[m]SWCOD2450.5[m]SWCOD2465.0[m]DCSTRATLAB2480.0[m]DCSTRATLAB2495.0[m]DCSTRATLAB2497.5[m]SWCSTRATLAB2510.0[m]DCSTRATLAB2519.5[m]SWCOD2525.0[m]DCCSTRATLAB2538.0[m]SWCSTRATLAB2540.0[m]DCSTRATLAB2555.0[m]DCSTRATLAB2564.5[m]SWCOD2565.0[m]SWCSTRATLAB2570.0[m]DCSTRATLAB2585.0[m]DCSTRATLAB2591.5[m]SWCOD2595.0[m]DCSTRATLAB2605.0[m]DCSTRATLAB2615.0[m]DCSTRATLAB2624.0[m]SWCSTRATLAB2625.0[m]DCSTRATLAB2640.0[m]DCSTRATLAB2655.0[m]DCSTRATLAB2670.0[m]DCSTRATLAB2675.5[m]SWCOD2685.0[m]DCSTRATLAB2695.0[m]DCSTRATLAB2710.0[m]DCSTRATLAB2732.5[m]SWCOD2740.0[m]DCSTRATLAB2765.0[m]DCSTRATLAB2790.0[m]DCSTRATLAB2800.0[m]SWCOD2815.0[m]DCSTRATLAB2840.0[m]DCSTRATLAB2845.0[m]SWCOD2865.0[m]DCSTRATLAB2870.0[m]DCSTRATLAB2875.0[m]DCSTRATLAB2886.5[m]SWCOD2890.0[m]DCSTRATLAB2915.0[m]DCSTRATLAB2925.0[m]SWCSTRATLAB2940.0[m]DCSTRATLAB2957.0[m]SWCOD2965.0[m]DCSTRATLAB2990.0[m]DCSTRATLAB2991.0[m]DCSTRATLAB3015.0[m]DCSTRATLAB3040.0[m]DCSTRATLAB3067.0[m]SWCOD3070.0[m]DCSTRATLAB3095.0[m]DCSTRATLAB3120.0[m]DCSTRATLAB3145.0[m]DCSTRATLAB3170.0[m]DCSTRATLAB3195.0[m]DCSTRATLAB3220.0[m]DCSTRATLAB3240.0[m]DCOD3265.0[m]DCSTRATLAB3268.5[m]SWCSTRATLAB3280.0[m]DCSTRATLAB3280.0[m]DCOD3297.5[m]SWCOD3300.0[m]DCSTRATLAB3320.0[m]DCOD3320.0[m]DCOD3360.0[m]DCOD3400.0[m]DCOD3415.0[m]DCSTRATLAB3440.0[m]DCOD3480.0[m]DCOD3500.0[m]DCSTRATLAB3500.0[m]DCOD3520.0[m]DCOD3525.5[m]SWCOD3525.5[m]SWC3545.0[m]DCSTRATLAB3560.0[m]DCOD3570.0[m]DCSTRATLAB3600.0[m]DC3600.0[m]DCOD3640.0[m]DCOD3660.0[m]DCOD3680.0[m]DCOD3695.0[m]DC3705.0[m]DC3714.0[m]DCSTRATLAB3720.0[m]DCOD3726.0[m]DCSTRATLAB3735.0[m]DCSTRATLAB3747.0[m]DCSTRATLAB3756.0[m]DCSTRATLAB3759.0[m]DCSTRATLAB3760.0[m]DCOD3762.0[m]DCSTRATLAB3765.0[m]DC3800.0[m]DCOD3820.0[m]DCOD3840.0[m]DCOD3880.0[m]DCOD3920.0[m]DCOD3960.0[m]DCOD3966.0[m]DCSTRATLAB3981.0[m]DCSTRATLAB3999.0[m]DC4000.0[m]SWCSTRATLAB4000.0[m]DCOD4020.0[m]DCOD4020.0[m]DC4029.0[m]DC4040.0[m]SWCSTRATLAB4040.0[m]DCOD4050.0[m]DC4071.0[m]DCSTRATLAB4078.0[m]SWCSTRATLAB4080.0[m]DCOD4083.0[m]SWCSTRATLAB4086.0[m]DCSTRATLAB4090.0[m]SWCSTRATLAB4101.0[m]DCSTRATLAB4120.0[m]DCOD4122.0[m]DCSTRATLAB4123.0[m]SWCSTRATLAB4140.0[m]DC4140.0[m]DCOD4158.0[m]DC4160.0[m]SWCSTRATLAB4160.0[m]DCOD4161.0[m]CSTRATLAB4161.1[m]COD4161.1[m]COD4162.7[m]COD4168.2[m]COD4170.0[m]SWCSTRATLAB4171.1[m]CSTRATLAB4171.2[m]COD4172.4[m]COD4176.0[m]CSTRATLAB4179.0[m]DCSTRATLAB4180.0[m]DCOD4182.2[m]CRRI4182.3[m]COD4182.6[m]COD4182.6[m]CSTRATLAB4183.8[m]CRRI4185.4[m]CRRI4186.3[m]COD4187.0[m]CRRI4187.6[m]CRRI4200.0[m]DCOD4200.0[m]DCSTRATLAB4216.0[m]SWCSTRATLAB4221.0[m]DCSTRATLAB4240.0[m]DCOD4242.0[m]DCSTRATLAB4263.0[m]DCSTRATLAB4278.0[m]DC4280.0[m]DCOD4284.0[m]DC4300.0[m]DCOD4305.0[m]DCSTRATLAB4313.0[m]SWCSTRATLAB4320.0[m]DCOD4326.0[m]DCSTRATLAB4330.0[m]SWCSTRATLAB4338.0[m]DC4340.0[m]DCOD4360.0[m]DCOD4362.0[m]DCSTRATLAB4380.0[m]DC4380.0[m]DCOD4398.0[m]DC4398.0[m]SWCSTRATLAB4400.0[m]DCOD4401.0[m]DC4420.0[m]DCSTRATLAB4440.0[m]DCOD4441.0[m]DCSTRATLAB4461.0[m]DCSTRATLAB4480.0[m]DCOD4482.0[m]DCSTRATLAB4500.0[m]DC4500.0[m]DCOD4502.0[m]SWCSTRATLAB4515.0[m]DCSTRATLAB4520.0[m]DCOD4530.0[m]DC4560.0[m]SWCSTRATLAB4560.0[m]DCOD4566.0[m]DC4584.0[m]DC4600.0[m]DCOD4602.0[m]DC4620.0[m]DCOD4640.0[m]DCOD -
Thin sections at the Norwegian Offshore Directorate
Thin sections at the Norwegian Offshore Directorate DepthUnit4186.01[m ]4179.72[m ]4174.65[m ]4169.71[m ]4166.38[m ]4164.42[m ]