NORWAY · WELLBORES · NPDID 2634
34/10-40 S
Exploration · Wildcat · Re-class to dev · Gas · Den norske stats oljeselskap a.s · PL 050
34/10-40 S is a wildcat exploration wellbore in the North Sea, drilled by Den norske stats oljeselskap a.s, entered Aug 13, 1995, to 5,900 m in the Drake Fm.
Discovery 34/10-40 S · On the map →
- 5,900
- m total depth · 2,375.6 m vertical
- 142.5
- m water depth
- Aug 13, 1995
- entered · completed Oct 13, 1995
- Drake Fm
- at total depth · Early Jurassic
- —
- m of core
- —
- °C bottom-hole temperature
SODIR FACTPAGES · RECORD UPDATED MAY 7, 2026 · RELEASED OCT 13, 1997
On file for this wellbore
What the Directorate holds from this wellbore. Each opens the section that lists it.
Drilling
- Drilling facility
- GULLFAKS B · Condeep 4 shafts
- Drilling days
- 50
- Kelly bushing elevation
- 80.7 m
- Maximum inclination
- 79°
- Drilling permit
- 821-L
- Licensing round
- Awarded additionally to round 3
- Plugged and abandoned
- —
- Core samples available
- Yes
- Cuttings samples available
- Yes
- Position · ED50
- 61.20304° N, 2.20136° E
- Hydrocarbons in
- Tarbert Fm · Middle Jurassic
Well history
WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE
General
Well 34/10-40 S was drilled on the Gullfaks fault block on Tampen Spur in the North Sea. The primary objective was to prove hydrocarbons in the Brent Group in Segment 7, North of the main Gullfaks Field.
Operations and results
Well was spudded through slot 19 on the Gullfaks B platform on 13 August 1995 and drilled deviated to TD at 5900 m 2375.6 m TVD) in the Early Jurassic Drake Formation. The well was drilled with Seawater and PAC mud down to 1495 m and with ANCO 2000 mud from 1495 m to TD.
The Brent Group was penetrated at 5336 m (2118 m TVD) and contained a 6.5 m TVD gas column with a gas-water contact at 5358.5 m (2125 m TVD). The well also penetrated, unexpectedly, a ca 40 m thick Heather Formation on top of the Brent Group. RFT pressure measurements indicated pressure depletion in the Brent Group due to production from the Gullfaks Field. The well was therefore completed as a water injector.
No cores were cut and no wire line fluid samples were taken.
The well was completed on 13 October 1995 as a minor gas discovery and converted to development well 34/10-B-35.
Testing
No drill stem test was performed.
Around this wellbore
This wellbore on Sodir FactPages →
About this data
Norwegian Offshore Directorate (Sodir) FactPages, mirrored nightly and used under the Norwegian Licence for Open Government Data (NLOD). Depths are metres along the wellbore from the kelly bushing unless a row gives its own unit; older cores are filed in feet. A zero the Directorate files for an unmeasured pressure, density, or temperature is shown as a dash.
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