34/8-15 S
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General information
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Wellbore history
GeneralWell 34/8-15 S was drilled on the northeast flank of Visund in the northern part of the North Sea. The objective was to prove petroleum in Middle Jurassic reservoir rocks (the Brent Group), as well as clarify possible reservoir communication with the Visund field.Operations and resultsWildcat well 34/8-15 S was drilled with the semi-submersible installation Cosl Pioneer from the Visund Nord subsea template. It was drilled as a sidetrack from the Visund Nord producer, 34/8-C-4 H. Operations on 34/8-15 S started on 3 January 2013 and the well was drilled to TD at 3690 m in the Middle Jurassic Drake Formation. The well was drilled with water-based mud down to 2069 m and with oil based mud from 2069 m to TD.A 16 m TVD thick Intra-Draupne Formation sandstone was encountered at 3439 m (2876 m TVD); Draupne Formation shales were not present. The Intra-Draupne sandstone rested directly on Brent Group sandstones at 3465 m (2892 m TVD). An approximately 50-metre gas column was present in the Intra-Draupne Formation - Brent Group sandstones with good reservoir quality down to a gas-water contact at 3512.6 m (2923.5 m TVD). Pressure data indicate pressure communication with the Visund field.No cores were cut and no wire line logs were run in the well. Pressure points were recorded on LWD. No fluid samples were taken.The well was permanently abandoned on 19 February 2013 as gas discovery. In June 2018 the well was reclassified as an appraisal well for the discovery 34/8-1 Visund.TestingNo drill stem test was performed. -
Palynological slides at the Norwegian Offshore Directorate
Palynological slides at the Norwegian Offshore Directorate Sample depthDepth unitSample typeLaboratory3400.0[m]DCPETROSTR3418.0[m]DCPETROS3439.0[m]DCPETROS3451.0[m]DCPETROS3463.0[m]DCPETROS3475.0[m]DCPETROS3487.0[m]DCPETROS3499.0[m]DCPETROS3505.0[m]DCPETROS3511.0[m]DCPETROS3517.0[m]DCPETROS3523.0[m]DCPETROS3529.0[m]DCPETROS3535.0[m]DCPETROS3541.0[m]DCPETROS3547.0[m]DCPETROS3553.0[m]DCPETROS3559.0[m]DCPETROS3577.0[m]DCPETROS3583.0[m]DCPETROS3589.0[m]DCPETROS3595.0[m]DCPETROS3601.0[m]DCPETROS3607.0[m]DCPETROS3613.0[m]DCPETROS3619.0[m]DCPETROS3625.0[m]DCPETROS3631.0[m]DCPETROS3637.0[m]DCPETROS3643.0[m]DCPETROS3649.0[m]DCPETROS3655.0[m]DCPETROS3661.0[m]DCPETROS3667.0[m]DCPETROS3673.0[m]DCPETROS3679.0[m]DCPETROS3685.0[m]DCPETROS3690.0[m]DCPETROS -
Lithostratigraphy
Lithostratigraphy Top depth [mMD RKB]Lithostrat. unit40311141165180218021861188520252025334034273427343934393465346534783507354636493649 -
Logs
Logs Log typeLog top depth [m]Log bottom depth [m]MWD - ABGR GR RES DEN NEU AC FPW34493690MWD - GR RES4982069MWD - GR RES DEN NEU AC20692707MWD - GR RES DEN NEU AC FPWD26633449 -
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 typeCONDUCTOR30490.036495.00.00SURF.COND.201257.0261300.01.52FITINTERM.13 3/82069.017 1/22070.01.72FITINTERM.9 5/82697.012 1/42700.01.79FITOPEN HOLE3690.08 1/23690.00.00 -
Drilling mud
Drilling mud Depth MD [m]Mud weight [g/cm3]Visc. [mPa.s]Yield point [Pa]Mud typeDate measured4481.5013.0KCl/Polymer12971.3921.0Performadril20781.5029.0Enviromul Yellow21321.5534.0Enviromul Yellow24001.5035.0Enviromul Yellow24501.6247.0Enviromul Yellow27071.5032.0Enviromul Yellow30181.5743.0Enviromul Yellow31301.6250.0Enviromul Yellow32301.6042.0Enviromul Yellow35211.6257.0Enviromul Yellow36901.6253.0Enviromul Yellow -
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]pdf0.23