30/11-10
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General information
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Wellbore history
GeneralWell 30/11-10 was drilled on the Krafla North prospect located on the edge of the Horda Platform towards the Viking Graben. Krafla North is located north of and close to the 30/11-8 S Krafla discovery. The primary objective was to prove reserves in the Tarbert, Ness, and Etive formations of the Brent Group.Operations and resultsWildcat well 30/11-10 was spudded with the semi-submersible installation Transocean Leader on 1 November 2014 and drilled to TD at 4079 m in the Early Jurassic Drake Formation. For field development data, acquisition purposes a 12 1/4'' pilot hole was drilled from below 20'' shoe and down through Skade, Oligocene and Grid sands to 1652 m. No significant problem was encountered in the operations. The well was drilled with spud mud down to 807 m and with XP-07 oil based mud from 807 m to TD.Top Brent Group, Tarbert Formation was encountered at 3445 m. The well proved oil in Tarbert and Etive Formations and rich gas-condensate in the Ness Formation. The upper part of Tarbert down to 3554 m had poor reservoir properties. The Brent Group succession proved oil-down-to (ODT) situations in most of the reservoir intervals. However, an in-well oil-water contact was estimated 3659 m in the Tarbert Formation based on PVT and pressure data. Shows were described throughout the Brent Group, including the Rannoch Formation. In the cored section of upper Drake Formation, weak residual shows were observed.Two cores were cut. Core number 1 recovered 54.5 meters from 3575 to 3629 m in the Tarbert Formation while core number 2 recovered 43.8 meters from 3997.2 m in the Rannoch Formation to 4041 m in the Drake Formation. MDT fluid samples were taken at 1025 m (water), 1313.5 m (water), 1463.5 (water), 3555.2 m (oil), 3590.3 m (oil), 3610.8 m (oil), 3663.8 m (water), 3896.7 m (oil), 3950.1 m (water), and 3994.2 m (oil).The well was permanently abandoned on 26 December 2014 as an oil and gas/condensate well.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]810.004079.00 -
Cores at the Norwegian Offshore Directorate
Cores at the Norwegian Offshore Directorate Core sample numberCore sample - top depthCore sample - bottom depthCore sample depth - uom13575.03629.5[m ]23997.24040.5[m ]Cores at the Norwegian Offshore Directorate Total core sample length [m]97.8Cores at the Norwegian Offshore Directorate Cores available for sampling?YES -
Oil samples at the Norwegian Offshore Directorate
Oil samples at the Norwegian Offshore Directorate Test typeBottle numberTop depth
MD [m]Bottom depth
MD [m]Fluid typeTest timeSamples availableMINI3590.300.00OILYESMINI3610.700.00OILNOMINI3896.700.00OILYESMINI3994.200.00OILYES -
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 typeCONDUCTOR30178.436184.00.00SURF.COND.20798.226807.00.00810.0810.01.35FITPILOT HOLE1652.012 1/41652.00.00INTERM.142088.017 1/22103.01.74LOTLINER9 5/83399.512 1/43404.01.90FITOPEN HOLE4079.08 1/24079.00.00 -
Logs
Logs Log typeLog top depth [m]Log bottom depth [m]AIT PEX HNGS33994041AIT PPC MSIP PEX HNGS7981631CMR ECS GR33894065MDT GR21002291MDT GR34484002MDT GR35553994MDT GR35903897MDT GR36633897MSCT GR34473897MSCT GR36523997MSCT GR36543995MSCT GR39973999MWD - ARCVRES6 TELE34004079MWD - ARCVRES9 TELE1772100MWD - PDX5 ARCVRES9 TELE21003401MWD - TELE128183NGI PPC MSIP PPC GR31004048PS PO LFA SC1 CMR GR7981631 -
Lithostratigraphy
Lithostratigraphy Top depth [mMD RKB]Lithostrat. unit1281285277777778101063159517551837218621862249227222962352249325442544282432383304337833783445344537443992399740134013 -
Drilling mud
Drilling mud Depth MD [m]Mud weight [g/cm3]Visc. [mPa.s]Yield point [Pa]Mud typeDate measured1281.3515.0Spud Mud1381.0327.0Spud Mud1831.3515.0Spud Mud3241.6020.0Kill Fluid- SW/Bentonite3311.0312.0Spud Mud5881.6020.0Kill Fluid- SW/Bentonite5881.0312.0Spud Mud5881.6020.0Kill Fluid- SW/Bentonite8071.2218.0OBM-Low ECD8071.3515.0Spud Mud8101.2219.0OBM-Low ECD17481.2222.0OBM-Low ECD19981.3520.0OBM-Low ECD20521.2222.0OBM-Low ECD22001.4026.0OBM-Low ECD25871.3323.0OBM-Low ECD31521.4325.0OBM-Low ECD31581.8243.0OBM-Low ECD32131.3521.0OBM-Low ECD32841.8341.0OBM-Low ECD33311.5029.0OBM-Low ECD33641.8348.0OBM-Low ECD34011.5029.0OBM-Low ECD34451.8344.0OBM-Low ECD35461.6335.0OBM-Low ECD37331.7036.0OBM-Low ECD39971.8038.0OBM-Low ECD40791.8340.0OBM-Low ECD -
Palynological slides at the Norwegian Offshore Directorate
Palynological slides at the Norwegian Offshore Directorate Sample depthDepth unitSample typeLaboratory894.0[m]DCPETROSTR900.0[m]DCPETROS1023.0[m]DCPETROS1044.0[m]DCPETROS1068.0[m]DCPETROS1080.0[m]DCPETROS1095.0[m]DCPETROS1110.0[m]DCPETROS1125.0[m]DCPETROS1140.0[m]DCPETROS1155.0[m]DCPETROS1170.0[m]DCPETROS1185.0[m]DCPETROS1200.0[m]DCPETROS1215.0[m]DCPETROS1230.0[m]DCPETROS1245.0[m]DCPETROS1260.0[m]DCPETROS1275.0[m]DCPETROS1290.0[m]DCPETROS1305.0[m]DCPETROS1311.0[m]DCPETROS1365.0[m]DCPETROS1380.0[m]DCPETROS1395.0[m]DCPETROS1410.0[m]DCPETROS1426.0[m]DCPETROS1441.0[m]DCPETROS1456.0[m]DCPETROS1600.0[m]DCPETROS1630.0[m]DCPETROS1651.0[m]DCPETROS1680.0[m]DCPETROS1710.0[m]DCPETROS1740.0[m]DCPETROS1760.0[m]DCPETROS1840.0[m]DCPETROS1850.0[m]DCPETROS1880.0[m]DCPETROS1910.0[m]DCPETROS1940.0[m]DCPETROS1970.0[m]DCPETROS2000.0[m]DCPETROS2030.0[m]DCPETROS2060.0[m]DCPETROS2090.0[m]DCPETROS2120.0[m]DCPETROS2150.0[m]DCPETROS2180.0[m]DCPETROS2200.0[m]DCPETROS2220.0[m]DCPETROS2240.0[m]DCPETROS2260.0[m]DCPETROS2280.0[m]DCPETROS2300.0[m]DCPETROS2320.0[m]DCPETROS2340.0[m]DCPETROS2360.0[m]DCPETROS2380.0[m]DCPETROS2400.0[m]DCPETROS2420.0[m]DCPETROS2440.0[m]DCPETROS2460.0[m]DCPETROS2480.0[m]DCPETROS2500.0[m]DCPETROS2520.0[m]DCPETROS2610.0[m]DCPETROS2640.0[m]DCPETROS2670.0[m]DCPETROS2700.0[m]DCPETROS2730.0[m]DCPETROS2760.0[m]DCPETROS2790.0[m]DCPETROS2820.0[m]DCPETROS2850.0[m]DCPETROS2880.0[m]DCPETROS2910.0[m]DCPETROS2940.0[m]DCPETROS2970.0[m]DCPETROS3000.0[m]DCPETROS3030.0[m]DCPETROS3060.0[m]DCPETROS3090.0[m]DCPETROS3120.0[m]DCPETROS3150.0[m]DCPETROS3180.0[m]DCPETROS3210.0[m]DCPETROS3240.0[m]DCPETROS3380.0[m]DCPETROS3390.0[m]DCPETROS3400.0[m]DCPETROS3409.0[m]DCPETROS3417.0[m]DCPETROS3418.0[m]DCPETROS3436.0[m]DCPETROS3445.0[m]DCPETROS3454.0[m]DCPETROS3463.0[m]DCPETROS3472.0[m]DCPETROS3481.0[m]DCPETROS3490.0[m]DCPETROS3499.0[m]DCPETROS3508.0[m]DCPETROS3517.0[m]DCPETROS3526.0[m]DCPETROS3535.0[m]DCPETROS3544.0[m]DCPETROS3553.0[m]DCPETROS3562.0[m]DCPETROS3571.0[m]DCPETROS3575.0[m]CPETROS3581.3[m]CPETROS3585.0[m]CPETROS3590.4[m]CPETROS3595.6[m]CPETROS3597.3[m]CPETROS3605.0[m]CPETROS3619.1[m]CPETROS3619.8[m]CPETROS3620.2[m]CPETROS3621.7[m]CPETROS3623.4[m]CPETROS3628.5[m]CPETROS3634.0[m]DCPETROS3643.0[m]DCPETROS3652.0[m]DCPETROS3661.0[m]DCPETROS3670.0[m]DCPETROS3679.0[m]DCPETROS3688.0[m]DCPETROS3697.0[m]DCPETROS3706.0[m]DCPETROS3715.0[m]DCPETROS3724.0[m]DCPETROS3733.0[m]DCPETROS3742.0[m]DCPETROS3751.0[m]DCPETROS3760.0[m]DCPETROS3769.0[m]DCPETROS3778.0[m]DCPETROS3787.0[m]DCPETROS3796.0[m]DCPETROS3805.0[m]DCPETROS3814.0[m]DCPETROS3823.0[m]DCPETROS3832.0[m]DCPETROS3841.0[m]DCPETROS3850.0[m]DCPETROS3859.0[m]DCPETROS3868.0[m]DCPETROS3877.0[m]DCPETROS3886.0[m]DCPETROS3895.0[m]DCPETROS3904.0[m]DCPETROS3913.0[m]DCPETROS3922.0[m]DCPETROS3931.0[m]DCPETROS3940.0[m]DCPETROS3949.0[m]DCPETROS3958.0[m]DCPETROS3967.0[m]DCPETROS3976.0[m]DCPETROS3985.0[m]DCPETROS3994.0[m]DCPETROS3997.4[m]CPETROS4000.7[m]CPETROS4003.4[m]CPETROS4003.9[m]CPETROS4007.3[m]CPETROS4012.5[m]CPETROS4019.5[m]CPETROS4025.5[m]CPETROS4033.5[m]CPETROS4037.0[m]CPETROS4039.0[m]DCPETROS4048.0[m]DCPETROS4057.0[m]DCPETROS4066.0[m]DCPETROS4075.0[m]DCPETROS4079.0[m]DCPETROS