6608/10-17 S
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General information
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Wellbore history
GeneralWell 6608/10-17 S was drilled to test the Cape Vulture prospects on the Revfallet Fault Complex, northwest of the Norne Field in the Norwegian Sea. The objective was to test the hydrocarbon potential in two turbiditic sandstones within the Early Cretaceous Lange Formation, called Cape Vulture Main and Cape Vulture Upper, respectively.Operations and resultsWildcat well 6608/10-17 S was spudded with the semi-submersible installation Deepsea Bergen on 4 December 2016 and drilled to TD at 3323 m (3294 m TVD) in Early Cretaceous (Berriasian) shales belonging to the Spekk Formation. While drilling the 8 ½" section and during plug P&A, 31.5 days (53% of total operations) was spent waiting on weather. Otherwise operations proceeded without significant problems. The well was drilled with seawater and hi-vis pills down to 1362 m and with XP-07 oil-based mud from 1362 m to TD.The top of the Lange Formation was encountered at 2796 m (2767 m TVD), top Cape Vulture Upper at 2947 m (2918 m TVD), and top Cape Vulture Main at 2987 m (2959 m TVD). Both reservoirs contained hydrocarbons. In Cape Vulture Upper, there was an 8 m oil column, of which 5 m were in sandstone with moderate to good reservoir properties. In Cape Vulture Main, the well encountered a total oil column of about 5 m with an overlying gas column of about 13 m, of which 3 and 10 m, respectively, were in sandstone with moderate to good reservoir properties.Fluorescence and cut were recorded on core chips from Cape Vulture main level, otherwise no conventional oil shows were reported from the well. However, Hydrocarbon Core Scanning identified very good shows to live oil in a thin sand at 3012 m below Cape Vulture Main. The resistivity log also indicates hydrocarbons in this sand as well as several thin sands from 2784 in the Lysing Formation and down to 3084 m in the Lange Formation.One core was cut with 100% recovery from 2956 to 3037 m, covering the Cape Vulture Main in the Lange Formation. MDT fluid samples were taken at 2952.7 m (oil), 2992.2 m (gas/condensate), and 3002.7 m (oil).The well was permanently abandoned on 31 January as 2017 as an oil and gas discovery.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]1370.003322.00 -
Cores at the Norwegian Offshore Directorate
Cores at the Norwegian Offshore Directorate Core sample numberCore sample - top depthCore sample - bottom depthCore sample depth - uom12956.03037.2[m ]Cores at the Norwegian Offshore Directorate Total core sample length [m]81.2Cores at the Norwegian Offshore Directorate Cores available for sampling?YES -
Lithostratigraphy
Lithostratigraphy Top depth [mMD RKB]Lithostrat. unit3983981367162516251881188119531981198121862659277927792796320533113311 -
Logs
Logs Log typeLog top depth [m]Log bottom depth [m]AIT MSIP PEX HNGS XPT25503325AIT NGI MDT PA27623100CMR ECS PEX AIT29403037MDT PA30003005MWD - GR374436MWD - GR RES4363323MWD - GR RES SON13592643VSI43323325XL ROCK27902953 -
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 typeCONDUCTOR30434.136436.00.00INTERM.13 3/81348.617 1/21359.01.58FITINTERM.9 5/82636.012 1/42643.01.77FITOPEN HOLE3323.08 1/23323.00.00 -
Drilling mud
Drilling mud Depth MD [m]Mud weight [g/cm3]Visc. [mPa.s]Yield point [Pa]Mud typeDate measured6501.5121.0XP-0713591.5420.0XP-0714091.5121.0XP-0723921.6228.0XP-0724701.5126.0XP-0726521.5534.0XP-0729551.5733.0XP-0730301.6228.0XP-0730371.6226.0XP-0730371.5728.0XP-0730911.6228.0XP-0732621.6128.0XP-0733221.6231.0XP-07 -
Thin sections at the Norwegian Offshore Directorate
Thin sections at the Norwegian Offshore Directorate DepthUnit2957.70[m ]2985.79[m ]2987.26[m ]2991.13[m ]2996.02[m ]2998.37[m ]3001.56[m ]3003.12[m ]3012.84[m ]3031.65[m ]