34/10-14
Exploration · Appraisal · P&A · Oil · Den norske stats oljeselskap a.s · Gullfaks · PL 050
34/10-14 is an appraisal exploration wellbore in the North Sea, drilled by Den norske stats oljeselskap a.s, entered Dec 24, 1981, to 2,647 m in the Hegre Gp.
Discovery 34/10-1 Gullfaks · On the map →
- 2,647
- m total depth
- 227
- m water depth
- Dec 24, 1981
- entered · completed Mar 19, 1982
- Hegre Gp
- at total depth · Late Triassic
- 141.9
- m of core in 10 cores
- 98
- °C bottom-hole temperature
SODIR FACTPAGES · RECORD UPDATED MAR 1, 2026 · RELEASED MAR 19, 1984
On file for this wellbore
What the Directorate holds from this wellbore. Each opens the section that lists it.
Drilling
- Drilling facility
- ROSS RIG (1) · Semisub steel
- Drilling days
- 86
- Kelly bushing elevation
- 25 m
- Maximum inclination
- 0°
- Drilling permit
- 312-L
- Licensing round
- Awarded additionally to round 3
- Plugged and abandoned
- —
- Core samples available
- Yes
- Cuttings samples available
- Yes
- Position · ED50
- 61.23347° N, 2.25524° E
- Hydrocarbons in
- Brent Gp · Middle Jurassic
Well history
WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE
General
Well 34/10-14 was drilled on a horst block in the north-eastern part of the Gullfaks field. The objectives of the well were to prove the structural position of the middle- and early Jurassic sandstones and to establish the oil-water contact in the Brent Group in this part of the field.
Operations and results
Appraisal well 34/10-14 was spudded with the semi-submersible installation Ross Rig on 24 December 1981 and drilled to TD at 2647 m in the Triassic Hegre Group. Significant downtime (17% of total rig time) was caused by the combined effect of bad weather and the need to pull the BOP three times to detect leaks. The well was drilled with gel/lignosulphonate/seawater mud all through.
Weak shows on limestone and claystone cuttings were recorded intermittently from 1506 m in the Hordaland down to top Shetland Group at 1729 m. Sandstones of the Ness Formation were oil-bearing from 1908 m to the oil-water contact, indicated by pressure measurements and logs to be at 1972 m. This corresponds to the OWC found in the wells 34/10-3, 5 and 8. Shows on cores continued down to 2002 m.
Ten cores were recovered, nine in the interval from 1889 to 2047m KB and one core from 2210 to 2228 KB. RFT fluid sampling was performed at 1917.5 m and 1961.5 m but the fluids recovered were not representative for the reservoir fluid.
The well was permanently abandoned on 19 March 1982 as an oil appraisal well.
Testing
One drill stem test was performed in the interval 1933.5 m to 1937.5 m in the Ness Formation. The tes
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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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