9/2-7 S
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General information
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Wellbore history
GeneralThe deviated well 9/2-7 S was drilled as an exploration well to identify the oil potential in the Beta Vest prospect on the Yme Field in PL 114. The well was drilled in the northern segment of the Beta Vest structure with the sandstones of the Sandnes Formation as the target horizon. The well was planned to be completed as an oil producer and be renamed to 9/2-B-3H.Operations and resultsWildcat well 9/2-7 S was spudded with the semi-submersible installation "Byford Dolphin" on 22 April 1997 and drilled to a total depth of 4099 m (3369.7 m TVD MSL) in the Middle Jurassic Bryne Formation. It was drilled from slot 3 on the Yme Beta HOST template with an "S" shaped profile in order to drill vertically through the Sandnes Formation. The Sandnes S12 target was penetrated approximately 1757 m North North-West of the template, at an inclination of about 5 deg. A 7" liner was run over the reservoir section. The bottom section fro 3923 m to TD was drilled with turbine and diamond bit. The well was drilled with seawater to 1192 m, with KCl polymer mud from 1192 m to 256 m, with ester-based Petrofree mud from 2576 m to 3867 m, and with Aquadrill glycol mud from 3867 m to TD. The well found oil all through the Sandnes Formation. The top of the Sandnes Formation was encountered at 3854 m (3125.6 m TVD MSL), with the top of the Sandnes Formation S11 reservoir sandstone at 3861,7 m (3133,3 m TVD MSL). The oil/water-contact was found in the Bryne Formation sandstones at 4067m MD (3337.9 m TVD MSL). Two cores were cut in the interval 3868 m - 3923 m in the Sandnes Formation. Two FMT fluid samples were taken at 3896 m in the Sandnes Formation oil zone. Exploration well 9/2-7 S was completed 10 June 1997 as an oil discovery and re-classified to development well 9/2-B-3 H.TestingNo drill stem test was performed. -
Cores at the Norwegian Offshore Directorate
Cores at the Norwegian Offshore Directorate Core sample numberCore sample - top depthCore sample - bottom depthCore sample depth - uom13868.03892.2[m ]23892.83922.4[m ]Cores at the Norwegian Offshore Directorate Total core sample length [m]53.8Cores 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 typeLaboratory3681.0[m]DCGEOSTR3690.0[m]DCGEOSTR3699.0[m]DCGEOSTR3708.0[m]DCGEOSTR3717.0[m]DCGEOSTR3726.0[m]DCGEOSTR3735.0[m]DCGEOSTR3744.0[m]DCGEOSTR3753.0[m]DCGEOSTR3762.0[m]DCGEOSTR3771.0[m]DCGEOSTR3780.0[m]DCGEOSTR3789.0[m]DCGEOSTR3798.0[m]DCGEOSTR3807.0[m]DCGEOSTR3816.0[m]DCGEOSTR3825.0[m]DCGEOSTR3834.0[m]DCGEOSTR3843.0[m]DCGEOSTR3852.0[m]DCGEOSTR3861.0[m]DCGEOSTR3864.4[m]CWESTL3871.9[m]CWESTL3872.5[m]CWESTL3878.6[m]CWESTL3885.5[m]CWESTL3887.5[m]CWESTL3889.5[m]CWESTL3893.7[m]CWESTL3901.8[m]CWESTL3907.0[m]CWESTL3908.8[m]CWESTL3918.9[m]CWESTL3927.0[m]DCGEOSTR3936.0[m]DCGEOSTR3945.0[m]DCGEOSTR3954.0[m]DCGEOSTR3963.0[m]DCGEOSTR3972.0[m]DCGEOSTR3981.0[m]DCGEOSTR3990.0[m]DCGEOSTR3999.0[m]DCGEOSTR4008.0[m]DCGEOSTR4017.0[m]DCGEOSTR4026.0[m]DCGEOSTR4035.0[m]DCGEOSTR4044.0[m]DCGEOSTR4053.0[m]DCGEOSTR4062.0[m]DCGEOSTR4071.0[m]DCGEOSTR4080.0[m]DCGEOSTR4089.0[m]DCGEOSTR4095.0[m]DCGEOSTR -
Lithostratigraphy
Lithostratigraphy Top depth [mMD RKB]Lithostrat. unit1024159459459801000104310571057111715852105218021802203236230623062318236833784385438543994 -
Composite logs
Composite logs Document nameDocument formatDocument size [MB]pdf0.68 -
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]pdf15.36 -
Logs
Logs Log typeLog top depth [m]Log bottom depth [m]FMT QUARTZDYNE CHT GR38684067MWD RES DIR GR1674099ZDL CN MAC DPIL CHT GR11853863ZDL DLL MLL CN MAC CHT GR38554086 -
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 typeSURF.COND.30162.036163.00.00LOTCONDUCTOR13 3/81185.017 1/21186.00.00LOTINTERM.9 5/83857.012 1/43860.00.00LOTLINER74099.08 1/24099.00.00LOT -
Drilling mud
Drilling mud Depth MD [m]Mud weight [g/cm3]Visc. [mPa.s]Yield point [Pa]Mud typeDate measured11921.39SEAWATER/PAC13111.6031.0KCL/PAC/XANVIS16871.6032.0KCL/PAC/PHPA18681.3929.0KCL/PAC/PHPA18681.3935.0KCL/PAC/PHPA21691.5745.0KCL/PAC/PHPA22291.5746.0KCL/PAC/PHPA24401.5742.0KCL/PAC/PHPA25761.5744.0KCL/PAC/PHPA25761.5745.0PETROFREE25811.60DUMMY28061.6044.0PETROFREE29781.6044.0PETROFREE30881.6042.0PETROFREE34751.6040.0PETROFREE35181.6044.0PETROFREE37231.6039.0PETROFREE38321.60-462.0PETROFREE38521.60-461.0PETROFREE38671.60-461.0PETROFREE38811.3036.0AQUACOL38931.3035.0KCL/PAC/XANVIS39131.3037.0AQUACOL39231.3030.0KCL/PAC/XANVIS40321.3036.0AQUACOL40991.3039.0AQUACOL -
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