30/6-22
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General information
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Wellbore history
GeneralWell 30/6-22 was drilled on the 30/6-19 Beta Saddle Discovery between the Veslefrikk field and the 30/6-5 Oseberg East (Beta South) discovery. The discovery well 30/6-19 found oil in the Brent Group. The objectives of well 30/6-22 were to narrow the range in the oil/water contact levels in the Tarbert/Ness and the Etive/Rannoch/Oseberg Formations and to get information about lateral variation in reservoir quality.Operations and resultsAppraisal well 30/6 22 was spudded 21 May 1988 by Polar Frontier Drilling semi submersible rig Polar Pioneer and drilled to TD at 3336 m in the Late Jurassic Statfjord Group. Drilling went without problems, but the prospect was intersected 50 m away from where it was decided, in north-eastern direction. The well was drilled with spud mud down to 963 m and with KCl/polymer mud from 963 m to TD.Top Brent Group, Tarbert Formation was penetrated at 2874 m. Moveable oil was confirmed by logs, RFT pressure gradients and tests in sandstones in the Ness and Etive formations from 2908 m (2880 m TVD MSL). The OWC was not clearly defined, but indicated from RFT pressure gradients to be at 2935 m (2907 m TVD MSL). The Oseberg Formation was water bearing. The Cook Formation had good oil shows but it was tight and impossible to test. No shows were recorded in the Statfjord Formation.Six cores were cut in the well: The Brent Group was cored in five cores in the interval 2854 - 3009.9 m and one core was cut in the Cook Formation in the interval 3122.5 - 3150.4 m. RFT-tests indicated oil from 2910 m (Ness Formation) and mud filtrate from 2934 m (Etive Formation).The well was suspended on 13 July as an oil appraisal.TestingTwo DST tests were performed.DST 1 tested the interval 2917.2 - 2936.2 m in the Etive Formation. It produced 294 Sm3 oil and 19430 Sm3 gas /day through a 32/64" choke. The GOR was 67 Sm3/Sm3, the oil density was 0.892 g/cm3, and the gas gravity was 0.76 (air = 1) with no measurable H2S and 4 % CO2. The maximum flowing bottom hole temperature measured at sensor point 2852.8 m was 122.9 deg C.DST 2 tested the interval 2908.8 - 2912.3 m in the Ness Formation. It produced 480 Sm3 oil and 31680 Sm3 gas /day through a 32/64" choke. The GOR was 66 Sm3/Sm3, the oil density was 0.823 g/cm3, and the gas gravity was 0.765 (air = 1) with no measurable H2S and 4 % CO2. The maximum flowing bottom hole temperature measured at sensor point 2854.2 m was 123.7 deg C. -
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]970.003335.00 -
Cores at the Norwegian Offshore Directorate
Cores at the Norwegian Offshore Directorate Core sample numberCore sample - top depthCore sample - bottom depthCore sample depth - uom12854.02881.6[m ]22881.62905.5[m ]32906.02921.5[m ]42921.62958.4[m ]52958.53009.9[m ]63122.53150.3[m ]Cores at the Norwegian Offshore Directorate Total core sample length [m]182.9Cores at the Norwegian Offshore Directorate Cores available for sampling?YES -
Core photos
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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 availableDSTDST12917.002936.00OIL08.07.1988 - 00:00YESDSTDST22908.752912.25OIL07.07.1988 - 00:00YES -
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 typeCONDUCTOR30292.036292.00.00LOTINTERM.13 3/8948.017 1/2963.01.74LOTINTERM.9 5/82781.012 1/42798.01.69LOTLINER73333.08 1/23336.00.00LOT -
Drill stem tests (DST)
Drill stem tests (DST) Test numberFrom depth MD
[m]To depth MD
[m]Choke size
[mm]1.02917203612.72.02909291212.7Drill stem tests (DST) Test numberFinal shut-in pressure
[MPa]Final flow pressure
[MPa]Bottom hole pressure
[MPa]Downhole temperature
[°C]1.02.0Drill stem tests (DST) Test numberOil
[Sm3/day]Gas
[Sm3/day]Oil density
[g/cm3]Gas grav. rel.airGOR
[m3/m3]1.0294194300.8290.780682.0480316800.8230.76566 -
Logs
Logs Log typeLog top depth [m]Log bottom depth [m]CBL VDL GR26002340DIL LSS GR SP1902797DIS SDT NGS GR33373780LDL CNL DLL MSFL GR AMS27803334MWD202800RFT28813309RFT29022934RFT29302949SHDT27803338VSP10003240 -
Lithostratigraphy
Lithostratigraphy Top depth [mMD RKB]Lithostrat. unit20272188518931893199821472175248524972497262828752875288729162938294329982998312231703290 -
Geochemical information
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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]pdf18.34 -
Drilling mud
Drilling mud Depth MD [m]Mud weight [g/cm3]Visc. [mPa.s]Yield point [Pa]Mud typeDate measured2921.059.05.0WATER BASED24.05.19882921.059.05.0WATER BASED24.05.19885171.03WATER BASED23.04.19875301.03WATER BASED27.04.19875751.03WATER BASED29.04.19876621.059.05.0WATER BASED26.05.19886771.03WATER BASED27.04.19879631.059.05.0WATER BASED26.05.19889631.059.05.0WATER BASED27.05.19889751.03WATER BASED30.04.19879751.03WATER BASED04.05.19879751.03WATER BASED27.04.19879751.03WATER BASED05.05.19879751.2017.021.0WATER BASED06.05.198711621.2116.021.0WATER BASED06.05.198713101.4024.012.0WATER BASED30.05.198814381.4024.022.0WATER BASED06.05.198715981.4023.020.0WATER BASED06.05.198716011.4024.022.0WATER BASED11.05.198716031.4022.018.0WATER BASED07.05.198716791.287.012.0WATER BASED12.05.198717861.2714.015.0WATER BASED12.05.198718041.2729.018.0WATER BASED12.05.198719361.4327.09.0WATER BASED30.05.198820071.2713.017.0WATER BASED14.05.198721521.2923.016.0WATER BASED14.05.198721801.4328.09.0WATER BASED30.05.198822051.2715.015.0WATER BASED14.05.198722951.2721.017.0WATER BASED18.05.198723921.2716.012.0WATER BASED18.05.198724111.2716.012.0WATER BASED18.05.198724291.4329.09.0WATER BASED31.05.198825321.4528.09.0WATER BASED02.06.198825511.2715.014.0WATER BASED18.05.198725601.2518.08.0WATER BASED12.07.198826381.4526.09.0WATER BASED02.06.198827581.4527.010.0WATER BASED03.06.198827981.4520.010.0WATER BASED07.06.198827981.4521.010.0WATER BASED07.06.198827981.4521.010.0WATER BASED07.06.198828541.2514.05.0WATER BASED09.06.198828881.2515.05.0WATER BASED10.06.198829161.2517.06.0WATER BASED07.07.198829161.2517.06.0WATER BASED08.07.198829161.2517.06.0WATER BASED12.07.198829161.2517.06.0WATER BASED06.07.198829161.2518.08.0WATER BASED12.07.198829221.2514.05.0WATER BASED13.06.198829541.2516.06.0WATER BASED01.07.198829541.2516.06.0WATER BASED04.07.198829541.2515.06.0WATER BASED05.07.198829541.2516.06.0WATER BASED29.06.198829801.2521.07.0WATER BASED13.06.198830101.2520.07.0WATER BASED13.06.198830301.2516.05.0WATER BASED27.06.198830301.2515.05.0WATER BASED27.06.198830301.2516.05.0WATER BASED28.06.198830891.2519.07.0WATER BASED13.06.198831501.2519.06.0WATER BASED15.06.198832351.2517.07.0WATER BASED15.06.198832541.2515.05.0WATER BASED22.06.198832691.2515.05.0WATER BASED23.06.198832691.2516.05.0WATER BASED27.06.198833331.2516.06.0WATER BASED21.06.198833361.2521.07.0WATER BASED17.06.198833361.2516.06.0WATER BASED20.06.198833361.2516.05.0WATER BASED20.06.198833361.2519.06.0WATER BASED20.06.1988 -
Palynological slides at the Norwegian Offshore Directorate
Palynological slides at the Norwegian Offshore Directorate Sample depthDepth unitSample typeLaboratory2000.0[m]DCSTRAT2010.0[m]DCSTRAT2030.0[m]DCSTRAT2040.0[m]DCSTRAT2060.0[m]DCSTRAT2090.0[m]DCSTRAT2100.0[m]DCSTRAT2120.0[m]DCSTRAT2130.0[m]DCSTRAT2150.0[m]DCSTRAT2160.0[m]DCSTRAT2180.0[m]DCSTRAT2210.0[m]DCSTRAT2220.0[m]DCSTRAT2240.0[m]DCSTRAT2250.0[m]DCSTRAT2270.0[m]DCSTRAT2280.0[m]DCSTRAT2300.0[m]DCSTRAT2310.0[m]DCSTRAT2330.0[m]DCSTRAT2340.0[m]DCSTRAT2360.0[m]DCSTRAT2370.0[m]DCSTRAT2390.0[m]DCSTRAT2400.0[m]DCSTRAT2420.0[m]DCSTRAT2430.0[m]DCSTRAT2450.0[m]DCSTRAT2460.0[m]DCSTRAT2480.0[m]DCSTRAT2485.0[m]DCPETROSTR2490.0[m]DCSTRAT2495.0[m]DCPETROSTR2500.0[m]DCSTRAT2505.0[m]DCPETROSTR2510.0[m]DCSTRAT2520.0[m]DCSTRAT2525.0[m]DCPETROSTR2530.0[m]DCSTRAT2535.0[m]DCPETROSTR2540.0[m]DCSTRAT2545.0[m]DCPETROSTR2550.0[m]DCSTRAT2555.0[m]DCPETROSTR2570.0[m]DCSTRAT2575.0[m]DCPETROSTR2585.0[m]DCPETROS2590.0[m]DCSTRAT2595.0[m]DCPETROSTR2600.0[m]DCSTRAT2605.0[m]DCPETROSTR2610.0[m]DCSTRAT2615.0[m]DCPETROSTR2625.0[m]DCPETROS2630.0[m]DCSTRAT2635.0[m]DCPETROSTR2640.0[m]DCSTRAT2645.0[m]DCPETROS2655.0[m]DCPETROS2660.0[m]DCSTRAT2665.0[m]DCPETROSTR2670.0[m]DCSTRAT2675.0[m]DCPETROSTR2690.0[m]DCSTRAT2695.0[m]DCPETROSTR2700.0[m]DCSTRAT2715.0[m]DCPETROSTR2720.0[m]DCSTRAT2730.0[m]DCSTRAT2735.0[m]DCPETROSTR2745.0[m]DCPETROS2750.0[m]DCSTRAT2755.0[m]DCPETROSTR2760.0[m]DCSTRAT2765.0[m]DCPETROSTR2780.0[m]DCSTRAT2785.0[m]DCPETROSTR2790.0[m]DCSTRAT2790.0[m]DCPETROSTR2810.0[m]DCSTRAT2820.0[m]DCSTRAT2840.0[m]DCSTRAT2850.0[m]DCSTRAT2854.0[m]CSTRAT2860.0[m]CSTRAT2865.0[m]CSTRAT2870.0[m]CSTRAT2874.0[m]CSTRAT2880.0[m]CSTRAT2883.0[m]CSTRAT2889.0[m]CSTRAT2899.0[m]CSTRAT2902.0[m]CSTRAT2906.0[m]CSTRAT2913.0[m]CSTRAT2920.0[m]CSTRAT2923.0[m]CSTRAT2930.0[m]CSTRAT2935.0[m]CSTRAT2940.0[m]CSTRAT2947.0[m]CSTRAT2950.0[m]CSTRAT2954.0[m]CSTRAT2957.0[m]CSTRAT2965.0[m]CSTRAT2972.0[m]CSTRAT2976.0[m]CSTRAT2982.0[m]CSTRAT2984.0[m]CSTRAT2990.0[m]CSTRAT2995.0[m]CSTRAT3000.0[m]CSTRAT3004.0[m]CSTRAT3009.0[m]CSTRAT3020.0[m]DCSTRAT3030.0[m]DCSTRAT3040.0[m]DCSTRAT3050.0[m]DCSTRAT3060.0[m]DCSTRAT3070.0[m]DCSTRAT3080.0[m]DCSTRAT3090.0[m]DCSTRAT3100.0[m]DCSTRAT3110.0[m]DCSTRAT3123.0[m]CSTRAT3127.0[m]CSTRAT3134.0[m]CSTRAT3137.0[m]CSTRAT3144.0[m]CSTRAT3149.0[m]CSTRAT3160.0[m]DCSTRAT3170.0[m]DCSTRAT3180.0[m]DCSTRAT3190.0[m]DCSTRAT3200.0[m]DCSTRAT3212.0[m]DCSTRAT3220.0[m]DCSTRAT3230.0[m]DCSTRAT3240.0[m]DCSTRAT3250.0[m]DCSTRAT3260.0[m]DCSTRAT3270.0[m]DCSTRAT3280.0[m]DCSTRAT3290.0[m]DCSTRAT3300.0[m]DCSTRAT3310.0[m]DCSTRAT3320.0[m]DCSTRAT3335.0[m]DCSTRAT