6610/3-1 R
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General information
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Wellbore history
GeneralWildcat well 6610/3-1 is located ca 80 km southwest of the Røst Island in the Lofoten archipelago of Northern Norway. The main objective was to test the hydrocarbon potential in the Early Jurassic (Tilje Formation) sandstones. A secondary objective was to test the possibility of development of sandy fans from Early Tertiary (Paleocene) to Early Cretaceous. The secondary objective had been fulfilled by drilling of the primary entry 6610/3-1, which was temporarily abandoned in February 1993 due to problems induced by severe weather conditions. The re-entry was done to fulfil the primary objectives.Operations and resultsWildcat well 6610/3-1R is the re-entry of well 6610/3-1. It was entered with the semi-submersible installation Ross Isle on 15 September 1993 just below the 13 3/8" casing shoe in well 6610/3-1 (kick-off point at 1750 m in intra-Tang sandstone). Well 6610/3-1R was drilled to TD at 4200 m in the Triassic Red Beds. No significant technical problems were encountered during drilling. The well bore was drilled with ANCO 2000 mud from kick-off to TD.The Tilje Formation was encountered from 3771 m to 3935 m with sandstone interbedded with siltstone and with limestone and claystone stringers. The sandstone was mostly fine-grained and mostly silica and calcite cemented. An FMT pressure log was run, but no gradient could be established due to tight/impermeable Formation. The well penetrated three source rock formations: the Spekk Formation (3534 m to 3614 m), the Melke Formation (3614 m to 3705 m, and the Åre Formation coals (3935 m to 4147 m). Moderate to minor shows of unproducible character were detected at scattered intervals in the Lange Formation. These were indicated by wet gas occurrences, sediment extracts and oil recovered through mud injection in a test interval. Trace shows were also recorded on claystones/limestones and silty layers in the Spekk and Melke Formation. No producible oil or gas was encountered in the well. The Spekk Formation had high TOC, typically 7 - 9 %, but very moderate hydrogen index, typically 60 to 90 mg HC/g TOC. Assuming a Type II kerogen for the Spekk Formation Tmax values indicated post oil window maturity (typically 455 - 460 deg C) while vitrinite reflectance indicated peak - late oil window (%Ro around 0.8). The Åre coals had Tmax values around 480 deg C and vitrinite reflectance values around 1.15. Again Tmax indicated higher maturity than did the vitrinite reflectance, but both techniques indicate coals into the gas window.Three cores were cut in 6610/3-1R. One of these was cut from 3315 m to 3324.25 m in Intra Lange Sandstone, one from 3720 m to 3724.12 m in the Ile Formation, and one from 3741.3 m to 3747.9 m in the Tofte Formation. A segregated FMT fluid sample was taken at 4064.6 m. The reported content was mud filtrate under atmospheric pressure in both chambers.The well was suspended on 11 December 1993 as a dry hole with showsTestingWell 6610/3-1R was tested in 2 intervals in Intra Lange Sandstone. Test no. 1 tested the interval 3370 m to 3412 m. Test no. 2 tested the interval 3201 m to 3249 m. No fluids were produced. Both test intervals were tight. -
Cores at the Norwegian Offshore Directorate
Cores at the Norwegian Offshore Directorate Core sample numberCore sample - top depthCore sample - bottom depthCore sample depth - uom13315.03324.3[m ]23720.03724.4[m ]33741.03747.6[m ]Cores at the Norwegian Offshore Directorate Total core sample length [m]20.3Cores 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 typeINTERM.9 5/83469.012 1/43469.00.00LOTOPEN HOLE4200.08 1/24200.00.00LOT -
Logs
Logs Log typeLog top depth [m]Log bottom depth [m]CBL VDL GR16503470CORGUN GR25433474CORGUN GR35213566CORGUN GR35684198DIFL MAC GR17423476DIFL MAC GR34644200DLL MLL SL28753476FMT GR31174075FMT GR35113737FMT GR39724069HRDIP GR17423568HRDIP GR34754200MWD DPR17504200VSP7603460VSP19804190ZDL CN GR17423475ZDL CN GR34644201 -
Lithostratigraphy
Lithostratigraphy Top depth [mMD RKB]Lithostrat. unit3323323495555551366136614721556158516401805184218422044228423242505250525422655269528843047320334123418353435343614370537053711373037303772393541474170 -
Composite logs
Composite logs Document nameDocument formatDocument size [MB]pdf0.72 -
Geochemical information
Geochemical information Document nameDocument formatDocument size [MB]pdf2.83 -
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]pdf42.35 -
Drilling mud
Drilling mud Depth MD [m]Mud weight [g/cm3]Visc. [mPa.s]Yield point [Pa]Mud typeDate measured5221.5021.08.0DUMMY09.12.19935221.5021.08.0DUMMY10.12.199315501.5021.07.5DUMMY08.12.199317441.2510.09.0WATER BASED17.09.199317501.2524.07.5WATER BASED17.09.199318861.2516.04.0WATER BASED20.09.199320651.2523.05.0WATER BASED20.09.199322751.2522.04.5WATER BASED20.09.199323651.2519.04.5WATER BASED22.09.199324111.2518.04.0WATER BASED22.09.199324961.2523.05.5WATER BASED23.09.199324961.2523.05.5WATER BASED23.09.199324961.2523.05.5WATER BASED23.09.199324961.2523.05.5WATER BASED23.09.199325791.2522.05.5WATER BASED24.09.199325791.2522.05.5WATER BASED24.09.199326801.2523.05.0WATER BASED28.09.199328141.2521.05.0WATER BASED28.09.199328541.2519.05.0WATER BASED28.09.199330051.2521.05.5WATER BASED28.09.199330981.2520.06.0WATER BASED30.09.199331191.2523.05.0WATER BASED30.09.199331901.4020.06.5DUMMY02.12.199331901.5019.06.5DUMMY02.12.199331901.5020.06.5DUMMY03.12.199331901.5019.06.5DUMMY06.12.199331901.5021.07.0DUMMY06.12.199331901.5019.07.0DUMMY06.12.199331901.5020.07.0DUMMY08.12.199332621.2520.05.5WATER BASED01.10.199333151.25WATER BASED04.10.199333251.2522.06.0WATER BASED04.10.199333401.2520.05.5WATER BASED04.10.199333431.4020.07.0DUMMY02.12.199333431.4021.06.0DUMMY02.12.199333431.4021.06.0DUMMY02.12.199333551.3022.05.0WATER BASED05.10.199334121.4019.06.0DUMMY02.12.199334161.3321.05.5WATER BASED06.10.199334351.4020.05.5DUMMY24.11.199334351.4020.06.0DUMMY25.11.199334351.4022.07.0DUMMY02.12.199334601.3326.07.5WATER BASED11.10.199335301.3321.06.0WATER BASED11.10.199335401.7838.07.0WATER BASED01.11.199335471.7846.08.0WATER BASED01.11.199335471.6538.08.5WATER BASED25.10.199335471.6535.08.0WATER BASED27.10.199335471.7038.08.5WATER BASED27.10.199335471.7041.08.0WATER BASED01.11.199335471.7845.09.5WATER BASED01.11.199335471.7842.08.0WATER BASED01.11.199335471.6540.09.0WATER BASED22.10.199335471.7842.08.5WATER BASED01.11.199335471.7838.07.0WATER BASED01.11.199335501.8039.09.0WATER BASED22.11.199335501.8038.06.5WATER BASED16.11.199335501.8034.07.0WATER BASED10.11.199335501.8033.06.0WATER BASED11.11.199335501.8035.07.5WATER BASED12.11.199335501.8039.05.5WATER BASED16.11.199335501.8032.08.0WATER BASED16.11.199335501.8037.05.0WATER BASED16.11.199335501.8040.07.5WATER BASED17.11.199335501.8040.07.5WATER BASED18.11.199335501.8040.08.0WATER BASED19.11.199335681.4027.07.5WATER BASED11.10.199335681.5835.08.0WATER BASED11.10.199335681.5836.08.0WATER BASED11.10.199335681.5839.09.0WATER BASED12.10.199335681.5839.09.0WATER BASED14.10.199335681.5833.08.0WATER BASED14.10.199335681.5834.07.5WATER BASED15.10.199335681.5832.07.0WATER BASED21.10.199335681.5832.07.0WATER BASED21.10.199335681.5832.07.0WATER BASED21.10.199335681.5835.08.0WATER BASED21.10.199335681.5831.07.0WATER BASED21.10.199335741.7844.07.0WATER BASED02.11.199335741.8546.08.0WATER BASED03.11.199335921.6540.09.0WATER BASED22.10.199336351.6535.08.0WATER BASED27.10.199336351.6538.08.5WATER BASED25.10.199336401.7041.08.0WATER BASED01.11.199336401.7038.08.5WATER BASED27.10.199336991.7845.09.5WATER BASED01.11.199337201.7842.08.5WATER BASED01.11.199337401.7846.08.0WATER BASED01.11.199337401.7844.07.0WATER BASED02.11.199337401.8546.08.0WATER BASED03.11.199337411.8046.010.5WATER BASED09.11.199337411.7842.08.0WATER BASED01.11.199337491.8035.06.0WATER BASED09.11.199338201.8034.07.0WATER BASED10.11.199339301.8033.06.0WATER BASED11.11.199339721.8035.07.5WATER BASED12.11.199340261.8039.05.5WATER BASED16.11.199341381.8032.08.0WATER BASED16.11.199342001.8038.06.5WATER BASED16.11.199342001.8039.09.0WATER BASED22.11.199342001.8040.07.5WATER BASED18.11.199342000.0040.07.5WATER BASED17.11.199342001.8037.05.0WATER BASED16.11.199342001.8040.08.0WATER BASED19.11.1993 -
Palynological slides at the Norwegian Offshore Directorate
Palynological slides at the Norwegian Offshore Directorate Sample depthDepth unitSample typeLaboratory2543.0[m]SWCSTATO2550.0[m]SWCSTATO2578.0[m]SWCSTATO2610.0[m]DCRRI2630.0[m]DCRRI2650.0[m]DCRRI2670.0[m]DCRRI2690.0[m]DCRRI2704.0[m]SWCSTATO2716.0[m]SWCSTATO2736.0[m]SWCSTATO2762.0[m]SWCSTATO2780.0[m]DCRRI2790.0[m]SWCSTATO2808.0[m]SWCSTATO2825.0[m]SWCSTATO2840.0[m]DCRRI2860.0[m]SWCSTATO2875.0[m]SWCSTATO2882.0[m]SWCSTATO2890.0[m]SWCSTATO2922.5[m]SWCSTATO2938.0[m]SWCSTATO2957.5[m]SWCSTATO2970.0[m]DCRRI2980.0[m]SWCSTATO2990.0[m]DCRRI2998.0[m]SWCSTATO3012.0[m]SWCSTATO3025.0[m]SWCSTATO3036.0[m]DCRRI3040.0[m]SWCSTATO3050.0[m]SWCSTATO3060.0[m]SWCSTATO3069.0[m]DCRRI3078.0[m]DCRRI3087.0[m]DCRRI3095.0[m]SWCSTATO3105.0[m]DCRRI3116.0[m]SWCSTATO3126.0[m]DCRRI3135.0[m]SWCSTATO3153.0[m]DCRRI3162.0[m]DCRRI3171.0[m]DCRRI3181.0[m]SWCSTATO3192.0[m]SWCSTATO3213.0[m]DCRRI3222.0[m]DCRRI3230.0[m]SWCSTATO3240.0[m]DCRRI3249.0[m]DCRRI3258.0[m]DCRRI3267.0[m]DCRRI3276.0[m]DCRRI3285.0[m]DCRRI3294.0[m]DCRRI3303.0[m]DCRRI3303.0[m]DCSTATO3319.9[m]CSTATO3320.0[m]CSAGA3322.5[m]CSAGA3323.6[m]CSAGA3323.7[m]CSTATO3323.8[m]CSTATO3336.0[m]DCRRI3348.0[m]DCRRI3360.0[m]SWCSTATO3369.0[m]DCSTATO3378.0[m]DCRRI3384.0[m]DCRRI3393.0[m]SWCSTATO3411.0[m]DCRRI3420.0[m]DCRRI3429.0[m]DCSTATO3432.0[m]DCRRI3444.0[m]SWCSTATO3450.0[m]DCSTATO3456.0[m]DCRRI3468.0[m]DCSTATO3470.0[m]SWCSTATO3474.5[m]SWCSTATO3486.0[m]DCRRI3534.0[m]DCRRI3537.0[m]SWCSTATO3539.7[m]CSTATOIL3543.5[m]SWCSTATO3550.0[m]SWCSTATO3555.0[m]SWCSTATO3558.0[m]DCSTATO3561.0[m]DCRRI3563.5[m]SWCSTATO3566.0[m]SWCSTATO3567.0[m]DCSTATO3568.0[m]SWCSTATO3578.0[m]SWCSTATO3589.5[m]SWCSTATO3598.0[m]SWCSTATO3608.0[m]SWCSTATO3616.0[m]SWCSTATO3628.0[m]SWCSTATO3645.0[m]SWCSTATO3651.0[m]DCRRI3656.0[m]SWCSTATO3657.0[m]DCRRI3664.5[m]SWCSTATO3675.0[m]DCRRI3683.0[m]SWCSTATO3689.0[m]SWCSTATO3705.0[m]SWCSTATO3709.0[m]SWCSTATO3711.0[m]DCSTATO3712.0[m]SWCSTATO3720.0[m]CSTATO3720.0[m]CSAGA3720.4[m]CSAGA3721.0[m]CSTATO3721.0[m]CSAGA3723.7[m]CSTATO3724.0[m]CSAGA3724.4[m]CSAGA3727.0[m]SWCSTATO3733.5[m]SWCSTATO3740.0[m]DCSTATO3741.0[m]CSTATO3741.0[m]CSAGA3742.0[m]CSAGA3743.5[m]CSTATO3743.5[m]CSAGA3744.0[m]CSTATO3746.5[m]CSAGA3746.7[m]CSTATO3747.0[m]SWCSTATO3747.0[m]CSTATO3747.0[m]SWCSTATO3747.6[m]CSAGA3762.0[m]SWCSTATO3777.0[m]SWCSTATO3786.0[m]SWCSTATO3843.0[m]SWCSTATO3852.0[m]DCRRI3860.0[m]SWCSTATO3868.5[m]SWCSTATO3870.0[m]DCSTATO3872.0[m]SWCSTATO3877.0[m]SWCSTATO3882.0[m]DCRRI3888.0[m]SWCSTATO3897.0[m]DCSTATO3904.0[m]SWCSTATO3912.0[m]DCRRI3920.0[m]SWCSTATO3927.0[m]DCRRI3936.0[m]SWCSTATO3948.0[m]SWCSTATO3950.0[m]DCSTATO3978.0[m]SWCSTATO3997.5[m]SWCSTATO4028.0[m]SWCSTATO4035.5[m]SWCSTATO4045.0[m]SWCSTATO4053.0[m]DCRRI4059.0[m]DCSTATO4059.0[m]SWCSTATO4068.0[m]DCRRI4083.0[m]DCSTATO4102.5[m]SWCSTATO4114.0[m]SWCSTATO4155.0[m]DCRRI4164.0[m]DCRRI4173.0[m]DCRRI4182.0[m]DCRRI4191.0[m]DCRRI4200.0[m]DCRRI