NORWAY · WELLBORES · NPDID 887
34/10-31
Exploration · Appraisal · P&A · Gas · Den norske stats oljeselskap a.s · Gullfaks · PL 050
34/10-31 is an appraisal exploration wellbore in the North Sea, drilled by Den norske stats oljeselskap a.s, entered Feb 1, 1986, to 420 m in the Nordland Gp.
Discovery 34/10-1 Gullfaks · On the map →
- 420
- m total depth · 420 m vertical
- 132
- m water depth
- Feb 1, 1986
- entered · completed Apr 8, 1986
- Nordland Gp
- at total depth · Pliocene
- —
- m of core
- —
- °C bottom-hole temperature
SODIR FACTPAGES · RECORD UPDATED FEB 20, 2026 · RELEASED APR 8, 1988
On file for this wellbore
What the Directorate holds from this wellbore. Each opens the section that lists it.
Drilling
- Drilling facility
- WEST VENTURE OLD · Semisub steel
- Drilling days
- 67
- Kelly bushing elevation
- 32 m
- Maximum inclination
- 1.60000002°
- Drilling permit
- 502-L
- Licensing round
- Awarded additionally to round 3
- Plugged and abandoned
- —
- Core samples available
- Yes
- Cuttings samples available
- No
- Position · ED50
- 61.17567° N, 2.18763° E
- Hydrocarbons in
- Nordland Gp · Pliocene
Well history
WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE
General
Well 34/10-31 was drilled on the Gullfaks Field to drain possible shallow gas sands at the platform A location on the Gullfaks Field.
Operations and results
Appraisal well 34/10-31 was spudded with the semi-submersible installation West Venture on 8 April 1986 and drilled to TD at 420 m in Pliocene sediments in the Nordland Group. No significant problem was encountered in the operations. The well was drilled with water based mud.
Top Pliocene was encountered at 295 m. Electric logs through the 12 1/4" section proved three shallow gas sand layers at 344 - 346 m, 350 - 352 m, and 384.5 and 385.5 m. Average gas saturation in the three sands were estimated to 60%, 15%, and 40%, respectively.
No cores were cut and no fluid samples were taken. Cuttings samples were taken every 5 m from 270 m to TD.
The well was permanently abandoned on 14 December 1985.
Testing
A production test was conducted from the interval 344 to 346.5 m. Shallow gas was produced from 17 February up to 4 April when it was terminated due to an upcoming strike. A total of 2453203 Sm3 gas was produced at an average rate of ca 65000 Sm3 gas/day during the main draining flow. The gas gravity was 0.552 - 0.560 (air = 1). The reservoir temperature was reported to be 14 deg C.
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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