6506/12-10
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General information
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Wellbore history
GeneralThe main objective for well 6506/12-10 was to appraise the down flanks hydrocarbons in the Garn, Ile, Tilje, and the Åre Formations, on the Smørbukk Field.Operations and resultsThe vertical appraisal well 6506/12-10 was spudded with the semi-submersible installation "Ross Rig" on 21 April and drilled to 5097 m in the Early Jurassic Åre Formation within the planned budget. Boulders were encountered drilling the 36" section, and was the main reason why the 22" underreamer became stuck in 20" casing. As 12 1/4" pilot hole was drilled to 890 m, gas flow occurred when flow checking with seawater at 628 m. The 20" casing had to be set above this zone, which was considerable higher than planned. A 16" liner was then set to obtain enough integrity below 16" liner shoe to drill 17 1/2" section to 2795 m for optimum setting depth of 13 3/8" casing (lower part of Shetland). All other casing strings were set at planned depths according to "Base case" in the drilling programme. The well was drilled with seawater/bentonite down to 562 m, seawater/bentonite/CMC from 562 m to 1602 m, and Anco 2000 mud with Anco 208 glycol additive from 1602 m to 2790 m. Oil based mud (ANCO VERT) was used from 2790 The 6506/12-10 well proved no producible oil or gas in neither the Fangst nor the Båt Groups, thereby delineating hydrocarbons to the central areas of the field. The results of the 6506/12-10 well lead to the conclusion that there had to be drilled a sidetrack well in order to fulfill the obligations of the well and perform an extended production test of the Tilje Formation. Fourteen cores were cut in the Fangst and Båt Groups. FMT fluid samples were taken at four levels within the Åre and Tilje Formations. They contained mainly base oil (from the drilling fluid) and water. No indigenous hydrocarbons were found. It was decided to sidetrack the well and to penetrate higher up on the structure (6506/12-10 A). The vertical well was plugged with top plug (kick-off plug) in 13 3/8" casing and classified as a dry appraisal well on 16 June 1995.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]570.004848.00 -
Cores at the Norwegian Offshore Directorate
Cores at the Norwegian Offshore Directorate Core sample numberCore sample - top depthCore sample - bottom depthCore sample depth - uom14564.04592.2[m ]24592.24616.0[m ]34660.04671.1[m ]44672.04694.8[m ]54696.04717.9[m ]64848.04873.3[m ]74873.34886.0[m ]84887.04908.4[m ]94908.44928.0[m ]104928.14964.0[m ]114964.64986.0[m ]124986.65023.0[m ]135023.85059.0[m ]145059.55096.0[m ]Cores at the Norwegian Offshore Directorate Total core sample length [m]352.3Cores 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 typeCONDUCTOR36370.030371.00.00LOTINTERM.20556.026557.01.32LOTINTERM.161581.0181583.01.73LOTINTERM.13 3/82780.017 1/22782.01.87LOTINTERM.9 5/84550.012 1/44550.01.80LOTOPEN HOLE5097.08 1/25097.00.00LOT -
Logs
Logs Log typeLog top depth [m]Log bottom depth [m]4-ARM CAL GR15704540DCBIL GR37305091DIFL ACL ZDL CN CHT GR45454845DPIL MAC DSL45465091FMT GR49295052FMT VPC QDYNE GR45654779MAC GR37305091MWD DPR372890MWD DPR21584811MWD RGD3722158ZDL CN CAL GR33004540ZDL CN DEL2 GR45465091ZDL MAC DSL45465092ZOVSP MLRG SR15005075 -
Lithostratigraphy
Lithostratigraphy Top depth [mMD RKB]Lithostrat. unit309145219141914222722272315238423842555284833533353337241774229422942934545454546054636472347234777481448585024 -
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]pdf33.51 -
Drilling mud
Drilling mud Depth MD [m]Mud weight [g/cm3]Visc. [mPa.s]Yield point [Pa]Mud typeDate measured6151.1513.014.5WATER BASED03.05.19959601.157.06.0WATER BASED03.05.199513381.158.05.5WATER BASED03.05.199516021.159.06.5WATER BASED03.05.199516021.186.010.5WATER BASED03.05.199516021.1811.05.5WATER BASED05.05.199516021.189.06.5WATER BASED05.05.199516751.4021.09.0WATER BASED08.05.199520501.5529.013.0WATER BASED08.05.199521441.6033.013.0WATER BASED08.05.199521551.6029.012.5WATER BASED09.05.199523551.6531.012.0WATER BASED10.05.199524501.6540.020.5WATER BASED11.05.199524501.6536.019.0WATER BASED12.05.199524501.6542.020.0WATER BASED15.05.199524501.6542.018.0WATER BASED15.05.199524501.6734.014.0WATER BASED15.05.199524501.6726.010.0WATER BASED18.05.199524501.6725.07.0WATER BASED18.05.199524501.6726.07.0WATER BASED18.05.199527001.6647.06.5OIL BASED26.06.199527581.6540.020.5WATER BASED11.05.199527801.6646.06.5OIL BASED26.06.199527951.6542.018.0WATER BASED15.05.199527951.6726.010.0WATER BASED18.05.199527951.5340.07.0OIL BASED22.05.199527951.6725.07.0WATER BASED18.05.199527951.6734.014.0WATER BASED15.05.199527951.6542.020.0WATER BASED15.05.199527951.6536.019.0WATER BASED12.05.199527951.6726.07.0WATER BASED18.05.199527951.6725.07.0WATER BASED19.05.199528501.6647.06.5OIL BASED26.06.199529001.6643.08.0OIL BASED23.06.199532011.5340.07.0OIL BASED22.05.199537221.5341.07.5OIL BASED22.05.199539851.5339.06.5OIL BASED23.05.199541821.5338.06.0OIL BASED26.05.199543211.6045.07.5OIL BASED26.05.199544661.6048.08.5OIL BASED26.05.199545311.6443.08.5OIL BASED29.05.199545311.6649.010.5OIL BASED29.05.199545481.6650.010.0OIL BASED29.05.199545641.2021.010.0OIL BASED07.06.199545641.2022.09.0OIL BASED08.06.199545641.2025.06.0OIL BASED20.06.199545641.2022.08.5OIL BASED09.06.199545641.2022.08.0OIL BASED12.06.199545641.2022.08.0OIL BASED12.06.199545641.2022.07.0OIL BASED12.06.199545641.2024.06.0OIL BASED14.06.199545641.2024.06.0OIL BASED15.06.199545641.2025.06.0OIL BASED20.06.199545921.2017.07.0OIL BASED07.06.199546191.2020.06.5OIL BASED07.06.199546601.2018.08.5OIL BASED07.06.199546961.2023.07.5OIL BASED07.06.199547181.2021.07.0OIL BASED07.06.199548111.2021.010.0OIL BASED07.06.199548481.2022.09.0OIL BASED08.06.199548721.2022.08.5OIL BASED09.06.199548871.2022.08.0OIL BASED12.06.199549081.2022.07.0OIL BASED12.06.199549081.2022.08.0OIL BASED12.06.199549081.2024.06.0OIL BASED15.06.199549641.2024.06.0OIL BASED14.06.199550241.2025.06.0OIL BASED20.06.199550521.2026.07.0OIL BASED22.06.199550771.2025.06.0OIL BASED20.06.199550971.2028.06.0OIL BASED20.06.199550971.2026.07.0OIL BASED22.06.199550971.2026.07.5OIL BASED20.06.199550971.2027.07.0OIL BASED20.06.199550971.2027.06.0OIL BASED20.06.199550971.2026.07.0OIL BASED21.06.1995 -
Palynological slides at the Norwegian Offshore Directorate
Palynological slides at the Norwegian Offshore Directorate Sample depthDepth unitSample typeLaboratory1850.0[m]DCRRI1880.0[m]DCRRI1910.0[m]DCRRI1940.0[m]DCRRI1970.0[m]DCRRI2000.0[m]DCRRI2030.0[m]DCRRI2060.0[m]DCRRI2090.0[m]DCRRI2120.0[m]DCRRI2150.0[m]DCRRI2180.0[m]DCRRI2210.0[m]DCRRI2230.0[m]DCRRI2240.0[m]DCRRI2260.0[m]DCRRI2270.0[m]DCRRI2280.0[m]DCRRI2290.0[m]DCRRI2300.0[m]DCRRI2310.0[m]DCRRI2320.0[m]DCRRI2330.0[m]DCRRI2340.0[m]DCRRI2350.0[m]DCRRI2360.0[m]DCRRI2390.0[m]DCRRI2420.0[m]DCRRI2450.0[m]DCRRI2480.0[m]DCRRI2510.0[m]DCRRI2540.0[m]DCRRI2570.0[m]DCRRI2600.0[m]DCRRI2630.0[m]DCRRI2660.0[m]DCRRI2690.0[m]DCRRI2720.0[m]DCRRI2750.0[m]DCRRI2780.0[m]DCRRI2810.0[m]DCRRI2840.0[m]DCRRI2870.0[m]DCRRI2900.0[m]DCRRI2930.0[m]DCRRI2960.0[m]DCRRI2990.0[m]DCRRI3020.0[m]DCRRI3050.0[m]DCRRI3080.0[m]DCRRI3110.0[m]DCRRI3140.0[m]DCRRI3170.0[m]DCRRI3200.0[m]DCRRI3230.0[m]DCRRI3260.0[m]DCRRI3290.0[m]DCRRI3300.0[m]DCRRI3320.0[m]DCRRI3330.0[m]DCRRI3350.0[m]DCRRI3360.0[m]DCRRI3380.0[m]DCRRI3390.0[m]DCRRI3410.0[m]DCRRI3430.0[m]DCRRI3440.0[m]DCRRI3450.0[m]DCRRI3470.0[m]DCRRI3480.0[m]DCRRI3500.0[m]DCRRI3510.0[m]DCRRI3530.0[m]DCRRI3540.0[m]DCRRI3560.0[m]DCRRI3570.0[m]DCRRI3590.0[m]DCRRI3600.0[m]DCRRI3620.0[m]DCRRI3630.0[m]DCRRI3650.0[m]DCRRI3660.0[m]DCRRI3680.0[m]DCRRI3690.0[m]DCRRI3710.0[m]DCRRI3720.0[m]DCRRI3740.0[m]DCRRI3750.0[m]DCRRI3770.0[m]DCRRI3780.0[m]DCRRI3800.0[m]DCRRI3810.0[m]DCRRI3830.0[m]DCRRI3840.0[m]DCRRI3860.0[m]DCRRI3870.0[m]DCRRI3890.0[m]DCRRI3900.0[m]DCRRI3920.0[m]DCRRI3930.0[m]DCRRI3950.0[m]DCRRI3960.0[m]DCRRI3980.0[m]DCRRI3990.0[m]DCRRI4010.0[m]DCRRI4020.0[m]DCRRI4040.0[m]DCRRI4050.0[m]DCRRI4070.0[m]DCRRI4080.0[m]DCRRI4100.0[m]DCRRI4110.0[m]DCRRI4130.0[m]DCRRI4140.0[m]DCRRI4160.0[m]DCRRI4170.0[m]DCRRI4190.0[m]DCRRI4200.0[m]DCRRI4210.0[m]DCRRI4220.0[m]DCRRI4230.0[m]DCRRI4240.0[m]DCRRI4250.0[m]DCRRI4260.0[m]DCRRI4270.0[m]DCRRI4280.0[m]DCRRI4290.0[m]DCRRI4300.0[m]DCRRI4310.0[m]DCRRI4320.0[m]DCRRI4330.0[m]DCRRI4340.0[m]DCRRI4350.0[m]DCRRI4360.0[m]DCRRI4370.0[m]DCRRI4380.0[m]DCRRI4390.0[m]DCRRI4400.0[m]DCRRI4410.0[m]DCRRI4420.0[m]DCRRI4430.0[m]DCRRI4440.0[m]DCRRI4450.0[m]DCRRI4460.0[m]DCRRI4470.0[m]DCRRI4480.0[m]DCRRI4490.0[m]DCRRI4500.0[m]DCRRI4510.0[m]DCRRI4520.0[m]DCRRI4530.0[m]DCRRI4540.0[m]DCRRI4548.0[m]DCRRI4557.0[m]DCRRI4563.0[m]DCRRI4623.0[m]DCRRI4635.0[m]DCRRI4641.0[m]DCRRI4647.0[m]DCRRI4653.0[m]DCRRI4660.6[m]CRRI4664.6[m]CRRI4668.2[m]CRRI4670.5[m]CRRI4674.6[m]CRRI4679.6[m]CRRI4683.4[m]CRRI4687.3[m]CRRI4691.0[m]CRRI4694.7[m]CRRI4698.1[m]CRRI4702.4[m]CRRI4707.4[m]CRRI4711.8[m]CRRI4714.7[m]CRRI4717.6[m]CRRI4719.0[m]DCRRI4725.0[m]DCRRI4803.0[m]DCRRI4809.0[m]DCRRI4815.0[m]DCRRI4821.0[m]DCRRI4827.0[m]DCRRI4833.0[m]DCRRI4839.0[m]DCRRI4845.0[m]DCRRI4848.7[m]CRRI4854.9[m]DCUOS4860.0[m]DCUOS4861.0[m]DCUOS4861.3[m]CRRI4861.3[m]DCUOS4862.6[m]DCUOS4866.5[m]DCRRI4870.2[m]DCUOS4874.5[m]DCUOS4880.0[m]DCUOS4884.7[m]DCUOS4887.5[m]DCUOS4892.8[m]DCUOS4895.8[m]DCUOS4898.5[m]CRRI4898.5[m]DCUOS4901.8[m]DCUOS4907.8[m]DCUOS4912.6[m]DCUOS4915.9[m]DCUOS4920.2[m]CRRI4920.2[m]DCUOS4924.7[m]DCUOS4928.1[m]DCUOS4931.8[m]DCUOS4940.2[m]DCUOS4955.0[m]DCUOS4957.3[m]DCUOS4975.5[m]DCUOS4980.6[m]DCUOS4987.7[m]DCUOS5000.0[m]DCUOS5004.6[m]CRRI5009.4[m]CRRI5014.2[m]CRRI5019.6[m]CRRI5024.7[m]CRRI5029.1[m]CRRI5034.8[m]CRRI5039.2[m]CRRI5045.4[m]CRRI5050.8[m]CRRI5055.8[m]CRRI5060.2[m]CRRI5065.6[m]CRRI5070.4[m]CRRI5075.6[m]CRRI5079.8[m]CRRI5084.7[m]CRRI5089.7[m]CRRI5092.9[m]CRRI