General information Attribute ValueWellbore name6608/10-17 STypeEXPLORATIONPurposeWILDCATStatusP&APress releaseFactmaps in new windowMain areaNORWEGIAN SEADiscoveryWell name6608/10-17Seismic locationST11M01 inline 6070 xline 5106Drilled in production licenceDrilling operatorStatoil Petroleum ASDrill permit1643-LDrilling facilityDrilling days59Entered date04.12.2016Completed date31.01.2017Plugged and abondon date31.01.2017Release date31.01.2019Publication date22.03.2019Purpose - plannedWILDCATReentryNOContentOIL/GASDiscovery wellboreYES1st level with HC, ageCRETACEOUS1st level with HC, formationLANGE FM2nd level with HC, ageCRETACEOUS2nd level with HC, formationLANGE FMKelly bushing elevation [m]23.0Water depth [m]374.0Total depth (MD) [m RKB]3323.0Final vertical depth (TVD) [m RKB]3294.0Maximum inclination [°]14.7Oldest penetrated ageEARLY CRETACEOUSOldest penetrated formationSPEKK FMGeodetic datumED50NS degrees66° 4' 16.19'' NEW degrees8° 3' 36.03'' ENS UTM [m]7328347.00EW UTM [m]457455.02UTM zone32NPDID wellbore8065
Wellbore historyGeneralWell 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 NPD
Cuttings at the NPDCuttings available for sampling?YES Cuttings at the NPDCutting sample, top depth [m]Cutting samples, bottom depth [m]1370.003322.00
Cores at the NPD
Cores at the NPDCore sample numberCore sample - top depthCore sample - bottom depthCore sample depth - uom12956.03037.2[m ] Cores at the NPDTotal core sample length [m]81.2 Cores at the NPDCores available for sampling?YES
LithostratigraphyTop depth [m]Lithostrat. unit3983981367162516251881188119531981198121862659277927792796320533113311
LogsLog 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 testsCasing typeCasing diam.
[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 mudDepth 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