6406/3-10 A
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General information
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Wellbore history
GeneralWell 6406/3-10 A is a geological side-track to well 6406/3-10 on the Halten Terrace in the Norwegian Sea. The primary objective was to appraise the oil discovery in the Garn, Ile and Tilje formations made by the 6406/3-10 well. The 6406/3-10 well also found hydrocarbons in the re Formation, but it was not fully tested. A secondary objective with the side-track was therefore to drill deeper into re for a more complete evaluation of this formation.Operations and resultsAppraisal well 6406/3-10 A was kicked off at 2281 m in the main well on 14 July 2021. It was drilled with the semi-submersible installation DeepSea Aberdeen to TD at 5190 m (4884 TVD) m in the Early Jurassic re Formation. Operations proceeded without significant problems. The well was drilled with Innovert NS oil-based mud from kick-off to TD.The Bergknapp side-track 6406/3-10 A confirmed an oil column of 6 meters in Garn Formation, with a sandstone layer of 62 meters net of moderate to poor reservoir quality. The oil-water contact (OWC) was found at 4408 m (4102 m TVD). This could be an oil-down-to (ODT) contact in case of a sealing layer underneath.An oil column of 2.5 m was confirmed in the upper sandstone in the Ile Formation.The Tilje Formation had oil in three zones: an upper 15 m zone with OWC/ODT at 4764 m (4458 m TVD), a thin sandstone at 4793 m as confirmed by sampling, and an 8-meter oil column with OWC/ODT at 4821.5 m (4516 m TVD). There were no oil shows other than in the hydrocarbon-bearing formations in the Fangst and B t Groups.A total of 318.5 m core was recovered in 5 core runs. Garn/Not was cored from 4394 to 4477 m in two cores. The first core jammed of and got 89.6 % recovery , the second had 100.8% recovery. Ile/Ror was cored in one core from 4530 to 4602 m with 100.7 % recovery. Tilje/ re was cored in two cores from 4712 to 4874 m with 101.1 % and 100.9 % recoveries. The core-log depth shifts were in the range 5.6 to 7.4 m.Wire line fluid samples were taken in the Garn Formation at 4406.4 m (OBM filtrate) and 4430.8 m (Water and OBM filtrate), in the Ile Formation at 4520.6 m (oil and OBM filtrate) and 4543.7 m (water and OBM filtrate), in the Tilje Formation at 4781.7 m (water and OBM filtrate), 4792.7 m (oil and OBM filtrate), and in the re Formation at 5025.3 m (gas condensate).The well was permanently abandoned on 31 August 2021 as a as an oil and gas appraisal.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]2290.005190.00 -
Cores at the Norwegian Offshore Directorate
Cores at the Norwegian Offshore Directorate Core sample numberCore sample - top depthCore sample - bottom depthCore sample depth - uom14394.04403.9[m ]24405.04477.6[m ]34530.04602.5[m ]44712.04803.0[m ]54803.04875.5[m ]Cores at the Norwegian Offshore Directorate Total core sample length [m]318.4Cores 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 typeLINER9 7/84365.012 1/44366.00.00OPEN HOLE5190.08 1/25190.00.00 -
Logs
Logs Log typeLog top depth [m]Log bottom depth [m]CMR HXPT44004836CMR SON XPT DEN HNGS48505190CORE47124802DM GM EWR PWD46024712LWD - ABG PCDC DGR EWR PWD ALD C22814366LWD - AFR DM GM EWR PWD43664394LWD - CORE43944405LWD - CORE44054477LWD - CORE45304602LWD - CORE48024874LWD - DIR345418LWD - DIR PWD GR RES4181197LWD - DIR PWD GR RES ABG11972287LWD - DIR PWD GR RES DEN NEU48745057LWD - DIR PWD GR RES DEN NEU50575190LWD - DM GM EWR PWD44774530MDT44194796MDT45765190ORA44094790QAIT ADT APS NEXT HLDS HNGS32704927QGEO PPC MSIP PPC41004927SWC49905171USIT CBL21904363VSI12 VIVSP WA21584734 -
Lithostratigraphy
Lithostratigraphy Top depth [mMD RKB]Lithostrat. unit34234215411963196323392339240424652465262528453580358036854339433943604399439944724519458545854624463847154862 -
Drilling mud
Drilling mud Depth MD [m]Mud weight [g/cm3]Visc. [mPa.s]Yield point [Pa]Mud typeDate measured6351.5438.05.2INNOVERT23181.7333.04.3INNOVERT32801.5438.05.2INNOVERT33801.4745.07.6INNOVERT34571.7340.010.5INNOVERT42581.7338.015.3INNOVERT42901.4745.07.6INNOVERT43501.7342.012.4INNOVERT43941.2418.04.3INNOVERT45491.2420.06.2INNOVERT45901.4747.06.7INNOVERT46021.2423.04.7INNOVERT46731.2317.05.2INNOVERT48021.2421.03.8INNOVERT49271.3934.010.0Innovert49511.3836.08.6Innovert50561.2019.012.4INNOVERT50561.3624.05.7INNOVERT50571.2321.011.4Oil Base50571.2325.05.2INNOVERT51001.2424.04.7Oil Base51311.3738.09.5Innovert51811.3838.010.0Innovert51901.4442.09.5Innovert51911.4142.09.5Innovert