34/2-4
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General information
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Wellbore history
GeneralWildcat well 34/2-4 was drilled in the southeastern corner of block 34/2. The objective of the well was to test possible hydrocarbon accumulations in the middle and Lower Jurassic sandstones.Operations and resultsThe well was spudded 22 March 1985 by the semi-submersible rig West Venture, and drilled to TD at 4107 m logger's depth (4110 m MD RKB) in the Lower Jurassic Statfjord Formation. The well was drilled with seawater and hi-vis pills down to 814 m and with gypsum/polymer mud from 814 m to TD. No significant problems were encountered during drilling.The lithology of the well corresponded very well with that of well 34/2-2 R with no significant sandstones down to the Lower Jurassic Cook Formation. The primary objective, a distal facies of the Middle Jurassic Brent sandstone, was not seen in this well. Instead, a claystone/shale sequence belonging to the Heather Formation was penetrated. Secondary target sandstones of the Lower Jurassic Cook and Statfjord Formations were drilled proving water wet. Weak oil shows were seen between 3030 m and 3740 m, with the most prominent shows in the 3245-3580 m interval. Oil shows were generally associated with thin sandstones and siltstones in a generally argillaceous section. Occasional thin limestone and/or dolomite stringers also provided oil indications. Geochemical analyses detected possible migrated hydrocarbons also in the Cook Formation. One core was cut with 58% recovery in the interval 3827 m to 3846 m. No wire line fluid samples were taken. The well was permanently abandoned as dry with weak shows on 11 June 1985.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]830.004106.00 -
Cores at the Norwegian Offshore Directorate
Cores at the Norwegian Offshore Directorate Core sample numberCore sample - top depthCore sample - bottom depthCore sample depth - uom13827.03837.9[m ]Cores at the Norwegian Offshore Directorate Total core sample length [m]10.9Cores at the Norwegian Offshore Directorate Cores available for sampling?YES -
Palynological slides at the Norwegian Offshore Directorate
Palynological slides at the Norwegian Offshore Directorate Sample depthDepth unitSample typeLaboratory1330.0[m]DCRRI1350.0[m]DCRRI1370.0[m]DCRRI1390.0[m]DCRRI1410.0[m]DCRRI1430.0[m]DCRRI1450.0[m]DCRRI1470.0[m]DCRRI1490.0[m]DCRRI1510.0[m]DCRRI1530.0[m]DCRRI1550.0[m]DCRRI1570.0[m]DCRRI1590.0[m]DCRRI1610.0[m]DCRRI1630.0[m]DCRRI1660.0[m]DCRRI1670.0[m]DCRRI1690.0[m]DCRRI1710.0[m]DCRRI1730.0[m]DCRRI1750.0[m]DCRRI1770.0[m]DCRRI1790.0[m]DCRRI1810.0[m]DCRRI1830.0[m]DCRRI1850.0[m]DCRRI1870.0[m]DCRRI1890.0[m]DCRRI1910.0[m]DCRRI1930.0[m]DCRRI1950.0[m]DCRRI1970.0[m]DCRRI1990.0[m]DCRRI2010.0[m]DCRRI2030.0[m]DCRRI2050.0[m]DCRRI2060.0[m]DCRRI2070.0[m]DCRRI2080.0[m]DCRRI2150.0[m]DCRRI2240.0[m]DCRRI2290.0[m]DCRRI2320.0[m]DCRRI2390.0[m]DCRRI2440.0[m]DCRRI2480.0[m]DCRRI2520.0[m]DCRRI2560.0[m]DCRRI2600.0[m]DCRRI2640.0[m]DCRRI2680.0[m]DCRRI2720.0[m]DCRRI2760.0[m]DCRRI2960.0[m]DCRRI3040.0[m]DCRRI3080.0[m]DCRRI3120.0[m]DCRRI3160.0[m]DCRRI3220.0[m]DCRRI3280.0[m]DCRRI3320.0[m]DCRRI3340.0[m]DCRRI3360.0[m]DCRRI3400.0[m]DCRRI3460.0[m]DCRRI3480.0[m]DCRRI3520.0[m]DCRRI3587.0[m]DCRRI3596.0[m]DCRRI3605.0[m]DCRRI3614.0[m]DCRRI3623.0[m]DCRRI3632.0[m]DCRRI3638.0[m]DCRRI3647.0[m]DCRRI3656.0[m]DCRRI3677.0[m]DCRRI3686.0[m]DCRRI3698.0[m]DCRRI3707.0[m]DCRRI3716.0[m]DCRRI3728.0[m]DCRRI3737.0[m]DCRRI3746.0[m]DCRRI3758.0[m]DCRRI3767.0[m]DCRRI3776.0[m]DCRRI3788.0[m]DCRRI3797.0[m]DCRRI3806.0[m]DCRRI3818.0[m]DCRRI3821.0[m]DCGEOLAB3824.0[m]DCGEOLAB3827.0[m]DCGEOLAB3827.7[m]CRRI3831.8[m]CRRI3834.1[m]CRRI3845.0[m]CRRI3851.0[m]DCGEOLAB3854.0[m]DCGEOLAB3857.0[m]DCGEOLAB3857.0[m]DCRRI3860.0[m]DCRRI3860.0[m]DCGEOLAB3863.0[m]DCGEOLAB3866.0[m]DCGEOLAB3869.0[m]DCGEOLAB3872.0[m]DCGEOLAB3875.0[m]DCGEOLAB3878.0[m]DCGEOLAB3878.0[m]DCRRI3881.0[m]DCGEOLAB3884.0[m]DCGEOLAB3887.0[m]DCGEOLAB3887.0[m]DCRRI3890.0[m]DCGEOLAB3893.0[m]DCGEOLAB3896.0[m]DCGEOLAB3896.0[m]DCRRI3899.0[m]DCGEOLAB3902.0[m]DCGEOLAB3905.0[m]DCGEOLAB3908.0[m]DCGEOLAB3908.0[m]DCRRI3911.0[m]DCGEOLAB3914.0[m]DCGEOLAB3917.0[m]DCGEOLAB3917.0[m]DCRRI3920.0[m]DCGEOLAB3923.0[m]DCGEOLAB3926.0[m]DCGEOLAB3926.0[m]DCRRI3929.0[m]DCGEOLAB3938.0[m]DCRRI3947.0[m]DCRRI3956.0[m]DCRRI3968.0[m]DCRRI3977.0[m]DCRRI3986.0[m]DCRRI3998.0[m]DCRRI4013.0[m]DCRRI4028.0[m]DCRRI4043.0[m]DCRRI4058.0[m]DCRRI4076.0[m]DCRRI4094.0[m]DCRRI4103.0[m]DCRRI -
Lithostratigraphy
Lithostratigraphy Top depth [mMD RKB]Lithostrat. unit42414701520194619461982207120712470324732873300330035353575358635863615361538213933397240634063 -
Composite logs
Composite logs Document nameDocument formatDocument size [MB]pdf0.45 -
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]pdf19.21 -
Logs
Logs Log typeLog top depth [m]Log bottom depth [m]CBL VDL BI CCL GR7002086CBL VDL BI CCL GR20653468DIL LSS SP CAL GR524812DIL LSS SP CAL GR8042145DIL SFL LSS GR SP35594108DIL SFL LSS SP GR21273570LDL CAL GR21273570LDL CNL CAL GR35594109NGL GR35594109VSP10004095 -
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 typeCONDUCTOR30524.036543.00.00LOTSURF.COND.20804.026814.01.58LOTINTERM.13 3/82126.017 1/22147.01.80LOTINTERM.9 5/83559.012 1/43570.02.05LOTOPEN HOLE4107.08 1/24107.00.00LOT -
Drilling mud
Drilling mud Depth MD [m]Mud weight [g/cm3]Visc. [mPa.s]Yield point [Pa]Mud typeDate measured4701.031.0WATER BASED25.03.19855371.031.0WATER BASED25.03.19855431.031.0WATER BASED25.03.19855430.001.0WATERBASED25.03.19855431.0413.014.4WATER BASED27.03.19855431.031.0WATER BASED29.03.19855431.0413.014.4WATER BASED27.03.19855431.031.0WATER BASED29.03.19855551.031.0WATER BASED03.04.19858141.031.0WATER BASED09.04.19858141.0315.026.3WATER BASED09.04.19858141.031.0WATER BASED02.04.19858141.0315.026.3WATER BASED09.04.19858141.031.0WATER BASED02.04.19858141.00WATER BASED01.04.19858141.031.0WATER BASED09.04.19858571.0712.06.8WATER BASED09.04.198512221.0117.08.0WATER BASED09.04.198514051.1216.08.0WATER BASED10.04.198518881.1913.09.1WATER BASED11.04.198519631.2013.014.4WATER BASED12.04.198521301.2218.010.5WATER BASED15.04.198521451.3715.013.9WATER BASED15.04.198521451.3915.011.5WATER BASED16.04.198521451.3712.09.1WATER BASED17.04.198521451.3812.09.1WATER BASED18.04.198521451.2818.012.5WATER BASED15.04.198521451.3715.013.9WATER BASED15.04.198521451.3915.011.5WATER BASED16.04.198521451.3712.09.1WATER BASED17.04.198521451.3812.09.1WATER BASED18.04.198521471.3914.010.1WATER BASED19.04.198522661.4126.09.6WATER BASED21.04.198524171.4414.011.5WATER BASED21.04.198525411.4317.012.9WATER BASED23.04.198526881.4314.011.5WATER BASED24.04.198527281.4518.023.0WATER BASED26.04.198527281.4518.023.0WATER BASED26.04.198527281.4518.012.0WATER BASED25.04.198527711.4518.012.9WATER BASED25.04.198528391.4414.011.5WATER BASED30.04.198529441.4415.012.5WATER BASED30.04.198529511.4426.09.6WATER BASED30.04.198529951.4413.011.5WATER BASED30.04.198530561.4513.011.0WATER BASED03.05.198531001.4516.010.1WATER BASED03.05.198531041.4719.09.1WATER BASED03.05.198531331.4718.07.7WATER BASED04.05.198531931.4824.08.1WATER BASED04.05.198532421.4825.09.6WATER BASED04.05.198532671.4822.08.1WATER BASED07.05.198533331.4822.08.6WATER BASED08.05.198533751.4822.014.8WATER BASED09.05.198533911.4922.014.8WATER BASED10.05.198534121.4921.09.1WATER BASED13.05.198534561.7328.08.1WATER BASED06.06.198534731.5023.09.6WATER BASED13.05.198535361.5021.09.6WATER BASED13.05.198535701.4921.011.0WATER BASED14.05.198535701.5222.011.5WATER BASED20.05.198535701.5221.011.0WATER BASED20.05.198535701.5222.012.0WATER BASED21.05.198535701.4921.011.0WATER BASED15.05.198535701.5221.011.0WATER BASED20.05.198535701.4921.011.0WATER BASED15.05.198535701.5222.011.5WATER BASED20.05.198535701.5221.011.0WATER BASED20.05.198535701.5222.012.0WATER BASED21.05.198535701.5221.011.0WATER BASED20.05.198536021.5021.011.5WATER BASED21.05.198536111.5021.011.5WATER BASED21.05.198536471.5119.010.1WATER BASED22.05.198536861.5119.010.0WATER BASED23.05.198537031.5121.08.6WATER BASED24.05.198537851.5221.08.1WATER BASED28.05.198538271.5321.08.1WATER BASED28.05.198538371.7720.08.6WATER BASED28.05.198538461.7426.09.6WATER BASED28.05.198539001.7527.09.6WATER BASED28.05.198539791.7426.09.1WATER BASED29.05.198540231.7627.09.6WATER BASED31.05.198540691.7326.09.1WATER BASED03.06.198541071.7329.09.1WATER BASED03.06.198541071.7329.09.1WATER BASED03.06.198541071.7329.09.1WATER BASED04.06.198541071.7328.08.1WATER BASED05.06.198541071.7329.09.1WATER BASED03.06.198541071.7329.09.1WATER BASED04.06.198541071.7328.08.1WATER BASED05.06.1985 -
Thin sections at the Norwegian Offshore Directorate
Thin sections at the Norwegian Offshore Directorate DepthUnit3833.65[m ]3837.25[m ]3835.35[m ]3834.25[m ]