33/9-18
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General information
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Wellbore history
GeneralWell 33/9-18 was drilled to a structure situated east of the Statfjord Field and south-west of the Tordis Field. The main objective of the vertical well 33/9-18 was to explore the hydrocarbon potential of possible sandstones and to test the current geological model. The secondary objective was to explore the hydrocarbon potential of a lead in the Heather Formation.Operations and resultsExploration well 33/9-18 was spudded on 16 November 1994 with the semi-submersible installation Deepsea Bergen and drilled to TD at 3253 m in the Late Jurassic Draupne Formation. The 36" and 26" hole sections were swept with high viscosity bentonite pills. The 17 1/2" and the 12 1/4" hole sections were drilled with KCl/PAC POLYMER and KCl mud system to prevent bit balling. No shallow gas was recorded.The well 33/9-18 had tight spots from 325 m to TD. Experienced differential sticking at 1230 m, 1650 m, 1680 m and tight hole from 1652 m to 3140 m. Bit balling occurred in 26" and 12 1/4" section. High viscosity bentonite pills were pumped to improve the flow pattern in an attempt to minimize balling problems.From 2450 m and down to base Cretaceous at 2849 m the pore pressure increases and reaches approximately 1.54 g/cc which is the maximum pore pressure in the well. The rest of the well has been interpreted as being drilled into the Viking Group, which here contain large slump/slide blocks of Statfjord Formation, Dunlin Group and Brent Group. Within those blocks, the pore pressure seem to be somewhat higher than original pressures in the Statfjord Field. FMT pressures gives pressures in the range of 1.47 g/cc at 3006 m and 1,5 g/cc at 3019 m. No fluid samples were collected in the well.Two cores were cut in Draupne Formation (core no. 1 was cut in the interval 2967-2978 m and core no. 2 was cut in interval 3045-3054 m) and 1 core in Heather Formation (in the interval 3233-3242 m). No hydrocarbon shows were observed. No fluid samples were collected.The well was permanently plugged as a dry well on 20 December 1994.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]770.003253.00 -
Cores at the Norwegian Offshore Directorate
Cores at the Norwegian Offshore Directorate Core sample numberCore sample - top depthCore sample - bottom depthCore sample depth - uom12967.02975.7[m ]23045.03054.0[m ]33233.03239.0[m ]Cores at the Norwegian Offshore Directorate Total core sample length [m]23.7Cores at the Norwegian Offshore Directorate Cores available for sampling?YES -
Core photos
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Palynological slides at the Norwegian Offshore Directorate
Palynological slides at the Norwegian Offshore Directorate Sample depthDepth unitSample typeLaboratory770.0[m]DCUOS790.0[m]DCUOS800.0[m]DCUOS840.0[m]DCUOS860.0[m]DCUOS880.0[m]DCUOS900.0[m]DCUOS920.0[m]DCUOS940.0[m]DCUOS960.0[m]DCUOS980.0[m]DCUOS1000.0[m]DCUOS1020.0[m]DCUOS1040.0[m]DCUOS1060.0[m]DCUOS1080.0[m]DCUOS1100.0[m]DCUOS1120.0[m]DCUOS1140.0[m]DCUOS1160.0[m]DCUOS1180.0[m]DCUOS1220.0[m]DCUOS1250.0[m]DCUOS1260.0[m]DCUOS1280.0[m]DCUOS1300.0[m]DCUOS1320.0[m]DCUOS1340.0[m]DCUOS1360.0[m]DCUOS1380.0[m]DCUOS1400.0[m]DCUOS1420.0[m]DCUOS1440.0[m]DCUOS1460.0[m]DCUOS1480.0[m]DCUOS1500.0[m]DCUOS1520.0[m]DCUOS1540.0[m]DCUOS1560.0[m]DCUOS1580.0[m]DCUOS1600.0[m]DCUOS1620.0[m]DCUOS1640.0[m]DCUOS1660.0[m]DCUOS1680.0[m]DCUOS1700.0[m]DCUOS1720.0[m]DCUOS1730.0[m]DCUOS1738.0[m]DCUOS1747.0[m]DCUOS1762.0[m]DCUOS1771.0[m]DCUOS1780.0[m]DCUOS1795.0[m]DCUOS1807.0[m]DCUOS1813.0[m]DCUOS1822.0[m]DCUOS1837.0[m]DCUOS1846.0[m]DCUOS1855.0[m]DCUOS1867.0[m]DCUOS1879.0[m]DCUOS1888.0[m]DCUOS1900.0[m]DCUOS1906.0[m]DCUOS1918.0[m]DCUOS1927.0[m]DCUOS1933.0[m]DCUOS1939.0[m]DCUOS1950.0[m]DCUOS2140.0[m]DCSTATO2160.0[m]DCSTATO2180.0[m]DCSTATO2200.0[m]DCSTATO2220.0[m]DCSTATO2240.0[m]DCSTATO2260.0[m]DCSTATO2280.0[m]DCSTATO2300.0[m]DCSTATO2320.0[m]DCSTATO2340.0[m]DCSTATO2360.0[m]DCSTATO2380.0[m]DCSTATO2400.0[m]DCSTATO2420.0[m]DCUOS2440.0[m]DCUOS2460.0[m]DCSTATO2480.0[m]DCSTATO2500.0[m]DCSTATO2520.0[m]DCSTATO2540.0[m]DCSTATO2560.0[m]DCSTATO2580.0[m]DCSTATO2600.0[m]DCSTATO2620.0[m]DCSTATO2640.0[m]DCSTATO2660.0[m]DCSTATO2680.0[m]DCSTATO2700.0[m]DCSTATO2720.0[m]DCSTATO2740.0[m]DCSTATO2760.0[m]DCSTATO2780.0[m]DCSTATO2781.0[m]SWCSTATO2800.0[m]DCSTATO2812.0[m]SWCSTATO2821.0[m]DCRRI2832.0[m]SWCSTATO2839.0[m]DCSTATO2848.0[m]DCSTATO2849.0[m]SWCSTATO2851.0[m]DCSTATO2852.0[m]SWCSTATO2854.0[m]DCSTATO2860.0[m]DCSTATO2860.0[m]SWCSTATO2863.0[m]DCSTATO2869.0[m]DCSTATO2872.0[m]SWCSTATO2875.0[m]DCSTATO2878.0[m]DCSTATO2881.0[m]DCSTATO2883.0[m]SWCSTATO2887.0[m]DCSTATO2893.0[m]DCSTATO2900.0[m]SWCSTATO2902.0[m]DCSTATO2914.0[m]DCSTATO2920.0[m]SWCSTATO2923.0[m]DCSTATO2925.0[m]DCSTATO2926.0[m]SWCSTATO2929.0[m]DCSTATO2933.0[m]SWCSTATO2938.0[m]DCSTATO2940.0[m]SWCSTATO2945.0[m]SWCSTATO2947.0[m]DCSTATO2953.0[m]DCSTATO2956.0[m]DCSTATO2959.0[m]DCSTATO2960.0[m]SWCSTATO2964.0[m]DCSTATO2965.0[m]DCSTATO2967.0[m]CSTATO2971.0[m]CSTATO2976.0[m]CSTATO2978.0[m]CSTATO2980.0[m]SWCSTATO2983.0[m]DCSTATO2983.0[m]SWCSTATO2988.0[m]SWCSTATO2992.0[m]DCSTATO2993.0[m]SWCSTATO2995.0[m]DCSTATO2998.0[m]DCSTATO3001.0[m]SWCSTATO3004.0[m]SWCSTATO3007.0[m]DCSTATO3012.0[m]SWCSTATO3015.0[m]SWCSTATO3016.0[m]DCSTATO3025.0[m]DCSTATO3027.0[m]SWCSTATO3030.0[m]SWCSTATO3033.0[m]DCSTATO3034.0[m]SWCSTATO3037.0[m]DCSTATO3044.0[m]SWCSTATO3048.0[m]CSTATO3054.0[m]CSTATO3061.0[m]DCSTATO3067.0[m]DCSTATO3073.0[m]DCSTATO3075.0[m]SWCSTATO3076.0[m]DCSTATO3079.0[m]DCSTATO3081.0[m]SWCSTATO3082.0[m]DCSTATO3091.0[m]DCSTATO3093.0[m]SWCSTATO3100.0[m]DCSTATO3104.0[m]SWCSTATO3106.0[m]DCSTATO3107.0[m]DCSTATO3109.0[m]DCSTATO3118.0[m]DCSTATO3121.0[m]DCSTATO3124.0[m]DCSTATO3126.0[m]SWCSTATO3127.0[m]DCSTATO3133.0[m]SWCSTATO3136.0[m]DCSTATO3145.0[m]DCSTATO3149.0[m]SWCSTATO3154.0[m]DCSTATO3157.0[m]DCSTATO3160.0[m]DCSTATO3163.0[m]DCSTATO3168.0[m]SWCSTATO3172.0[m]DCSTATO3175.0[m]DCSTATO3177.0[m]SWCSTATO3181.0[m]DCSTATO3190.0[m]DCSTATO3199.0[m]DCSTATO3205.0[m]DCSTATO3208.0[m]DCSTATO3217.0[m]DCSTATO3220.0[m]DCSTATO3225.0[m]SWCSTATO3226.0[m]DCSTATO3230.0[m]DCSTATO3233.0[m]DCSTATO3233.0[m]CSTATO3235.0[m]CSTATO3247.0[m]DCSTATO3250.0[m]DCSTATO3253.0[m]DCSTATO -
Lithostratigraphy
Lithostratigraphy Top depth [mMD RKB]Lithostrat. unit1689951028172917291767193319332195282128412841284628462946 -
Composite logs
Composite logs Document nameDocument formatDocument size [MB]pdf0.47 -
Geochemical information
Geochemical information Document nameDocument formatDocument size [MB]pdf0.96 -
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]pdf16.10 -
Logs
Logs Log typeLog top depth [m]Log bottom depth [m]DLL ZDL CNL GR19493242FMT GR29473235HEXDIP GR27763251MAC SL GR16503247MWD - DPR2343253SWC GR26903225VSP4703250 -
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 typeCONDUCTOR30229.036230.00.00LOTINTERM.20753.026755.01.49LOTINTERM.13 3/81951.017 1/21953.01.96LOTOPEN HOLE3253.08 1/23253.00.00LOT -
Drilling mud
Drilling mud Depth MD [m]Mud weight [g/cm3]Visc. [mPa.s]Yield point [Pa]Mud typeDate measured2341.04WATER BASED21.11.19944231.04WATER BASED21.11.19945171.04WATER BASED21.11.19947171.04WATER BASED21.11.19947641.04WATER BASED23.11.19947641.04WATER BASED24.11.19948751.2215.08.5WATER BASED28.11.199416361.4034.017.5WATER BASED28.11.199418151.4334.017.5WATER BASED28.11.199418151.4334.017.5WATER BASED01.12.199419001.5532.011.5WATER BASED21.12.199419661.4334.017.5WATER BASED01.12.199419661.4834.017.5WATER BASED01.12.199419661.4834.017.5WATER BASED02.12.199419691.4831.011.5WATER BASED05.12.199421051.4837.015.5WATER BASED05.12.199422891.4841.015.5WATER BASED07.12.199427451.5536.015.0WATER BASED07.12.199429501.5536.016.0WATER BASED08.12.199429671.5539.015.5WATER BASED09.12.199429781.5539.015.5WATER BASED12.12.199429781.5536.015.5WATER BASED12.12.199429781.5536.016.5WATER BASED12.12.199429781.5533.014.5WATER BASED19.12.199429781.5535.014.0WATER BASED13.12.199429781.5533.016.0WATER BASED15.12.199429781.5533.017.0WATER BASED16.12.199429781.5535.016.5WATER BASED19.12.199429781.5533.014.5WATER BASED19.12.199430071.5533.013.0WATER BASED21.12.199430071.5530.015.0WATER BASED19.12.199430141.5536.015.5WATER BASED12.12.199430201.5530.015.0WATER BASED19.12.199430201.5533.013.0WATER BASED21.12.199430541.5536.016.5WATER BASED12.12.199430751.5535.014.0WATER BASED13.12.199431741.5533.016.0WATER BASED15.12.199432331.5533.017.0WATER BASED16.12.199432421.5535.016.5WATER BASED19.12.199432531.5530.015.0WATER BASED19.12.199432531.5533.014.5WATER BASED19.12.199432531.5533.014.5WATER BASED19.12.199432531.5533.013.0WATER BASED21.12.1994 -
Thin sections at the Norwegian Offshore Directorate
Thin sections at the Norwegian Offshore Directorate DepthUnit2967.40[m ]2972.03[m ]2972.80[m ]2973.48[m ]3045.65[m ]3047.70[m ]3049.50[m ]3052.45[m ]3053.21[m ]3234.57[m ]3238.02[m ] -
Pressure plots
Pressure plots The pore pressure data is sourced from well logs if no other source is specified. In some wells where pore pressure logs do not exist, information from Drill stem tests and kicks have been used. The data has been reported to the NPD, and further processed and quality controlled by IHS Markit.Pressure plots Document nameDocument formatDocument size [MB]pdf0.22