6407/10-1
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General information
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Wellbore history
GeneralBlock 6407/10 is an oil prone part of the Halten Terrace. Well 6407/10-1 is located immediately to the south of the Njord Field in block 6407/7, on compartment B1 of the B-structure. The B-structure is down faulted relative to the Frøya High in south-southeast and to the A-structure in block 6407/7 to the west. The structure is dipping into a small, deep basin to the north. The main objectives of the well were to test hydrocarbon potential of the Garn, Ile and Ti1je Formations in the B-structure. Further objectives were to test the geological model and to calibrate the seismic interpretation and horizon identification. The well location was chosen to penetrate the target reservoir with an up-dip of less than 15-30x10 6 sm3 oil in place, and to penetrate the Tilje Formation within the expected depth range of the oil-water contact in the Ti1je Formations in the A-structure.Operations and resultsWildcat well 6407/10-1 was spudded 7 may 1987 by Polar Frontier Drilling semi-submersible rig Polar Pioneer and drilled to TD at 3347 m in the Triassic Grey Beds. Due to a shallow gas risk, the well was drilled without riser and logged with MWD down to 1100 m. The prognosed shallow gas levels were drilled without problems and only small peaks on the log indicated sand with a certain gas saturation. The 20" casing was skipped and 13 3/8" casing was set directly. The well was drilled with seawater and hi-vis pills down to 1117 m and with KCl mud from 1117 m to TD.The well was water bearing with a possible small amount of gas in the upper part of Ti1je Fm. Some shows were recorded in the Ile Formation. The Formation pressures encountered showed that the A and B compartments of the Njord Field are not in communication. Five cores were cut in the intervals 2582 - 2610 m (Rogn Formation), 2748 - 2776 m (Not Formation), 2817 - 2845 m (Ile Formation), 2845.5 - 2873.5 m (Ile / Ror Formation), and 2983 - 3011 m (Tilje Formation).The well was permanently abandoned on 19 June 1987 at as a dry hole.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]1100.003345.00 -
Cores at the Norwegian Offshore Directorate
Cores at the Norwegian Offshore Directorate Core sample numberCore sample - top depthCore sample - bottom depthCore sample depth - uom12582.02610.0[m ]22748.02776.0[m ]32817.02845.0[m ]42845.02872.9[m ]52983.03011.0[m ]Cores at the Norwegian Offshore Directorate Total core sample length [m]139.9Cores 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 typeCONDUCTOR30442.036590.00.00LOTINTERM.13 3/81101.017 1/21117.01.93LOTINTERM.9 5/82526.012 1/42545.01.91LOTOPEN HOLE3347.08 1/23347.00.00LOT -
Logs
Logs Log typeLog top depth [m]Log bottom depth [m]CST GR13002530CST GR25303325DIT-D LSS GR SP10982537DIT-D LSS GR SP24233345LDL CNL NGT MSFL24233345MWD - GR EWR27482947MWD - GR RES3663346RFT GR25822835RFT GR28353005SHDT GR10982539SHDT GR25233348VSP8003342 -
Lithostratigraphy
Lithostratigraphy Top depth [mMD RKB]Lithostrat. unit36636610411240124016711671173519132390239025732573257927022702280328682868297431553319 -
Composite logs
Composite logs Document nameDocument formatDocument size [MB]pdf0.38 -
Geochemical information
Geochemical information Document nameDocument formatDocument size [MB]pdf1.19 -
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]pdf11.58 -
Drilling mud
Drilling mud Depth MD [m]Mud weight [g/cm3]Visc. [mPa.s]Yield point [Pa]Mud typeDate measured3761.03WATER BASED11.05.19874161.4233.08.0WATER BASED18.06.19874421.03WATER BASED12.05.19875901.03WATER BASED12.05.198711171.20WATER BASED12.05.198711171.2022.010.0WATER BASED14.05.198711171.2021.011.0WATER BASED14.05.198713801.6036.014.0WATER BASED18.05.198717591.6045.015.0WATER BASED18.05.198721001.6045.014.0WATER BASED18.05.198721361.6045.011.0WATER BASED18.05.198722131.6045.011.0WATER BASED19.05.198722371.6044.011.0WATER BASED20.05.198722961.4233.08.0WATER BASED17.06.198724001.6037.011.0WATER BASED25.05.198724851.6037.011.0WATER BASED25.05.198725401.6036.010.0WATER BASED25.05.198725451.4524.08.0WATER BASED29.05.198725451.6031.09.0WATER BASED27.05.198725451.6031.09.0WATER BASED29.05.198725451.5223.07.0WATER BASED01.06.198725721.5228.08.0WATER BASED01.06.198726101.5232.07.0WATER BASED01.06.198727241.5233.07.0WATER BASED02.06.198727731.5232.08.0WATER BASED03.06.198728171.5232.07.0WATER BASED04.06.198728481.5230.07.0WATER BASED05.06.198729331.5231.08.0WATER BASED09.06.198729831.5230.09.0WATER BASED09.06.198730111.5230.08.0WATER BASED09.06.198730311.5229.08.0WATER BASED09.06.198730551.5230.09.0WATER BASED10.06.198731571.5029.08.0WATER BASED11.06.198732271.5032.09.0WATER BASED12.06.198733201.5034.09.0WATER BASED15.06.198733461.5037.09.0WATER BASED15.06.198733461.4233.08.0WATER BASED16.06.198733461.4230.08.0WATER BASED15.06.1987 -
Palynological slides at the Norwegian Offshore Directorate
Palynological slides at the Norwegian Offshore Directorate Sample depthDepth unitSample typeLaboratory2752.8[m]COD2757.9[m]COD2774.2[m]COD2819.5[m]COD2847.6[m]COD2853.9[m]COD -
Thin sections at the Norwegian Offshore Directorate
Thin sections at the Norwegian Offshore Directorate DepthUnit2588.30[m ]