NORWAY · WELLBORES · NPDID 212
34/10-20
Exploration · Wildcat · Junked · Dry · Den norske stats oljeselskap a.s · PL 050
34/10-20 is a wildcat exploration wellbore in the North Sea, drilled by Den norske stats oljeselskap a.s, entered Dec 23, 1983, to 3,747 m in the Cromer Knoll Gp.
- 3,747
- m total depth · 3,743 m vertical
- 135
- m water depth
- Dec 23, 1983
- entered · completed Apr 23, 1984
- Cromer Knoll Gp
- at total depth · Early Cretaceous
- —
- m of core
- 115
- °C bottom-hole temperature
SODIR FACTPAGES · RECORD UPDATED FEB 20, 2026 · RELEASED APR 23, 1986
On file for this wellbore
What the Directorate holds from this wellbore. Each opens the section that lists it.
Drilling
- Drilling facility
- ROSS ISLE · Semisub steel
- Drilling days
- 123
- Kelly bushing elevation
- 22 m
- Maximum inclination
- 4.30000019°
- Drilling permit
- 399-L
- Licensing round
- Awarded additionally to round 3
- Plugged and abandoned
- —
- Core samples available
- Yes
- Cuttings samples available
- Yes
- Position · ED50
- 61.02233° N, 2.29604° E
Well history
WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE
General
Well 34/10-20 was the first well drilled on the Gamma structure south of Gullfaks Sør in the northern North Sea. The primary objective was the Middle Jurassic Brent Group. Secondary objectives were Early Cretaceous sandstones, the Cook Formation and the Statfjord Group.
Operations and results
Wildcat well 34/10-20 was spudded with the semi-submersible installation Ross Isle on 23 December 1983 and drilled to TD at 3747 m in the Early Cretaceous Cromer Knoll Group. The well was plugged back and abandoned without reaching the targets. Engineering difficulties associated with high fluid pressure and low formation integrity was the reason why the well had to be abandoned. It was drilled with gel/seawater down to 1053 m, with KCl/polymer mud from 1053 m to 2990 m, and with lignosulphonate mud from 2990 m to TD.
The well was dry. Zones with weak shows, mostly on claystone cuttings, were recorded from 1860 m to 2050 m in the Rogaland Group.
No cores were cut and no wire line fluid samples were taken.
The well was permanently abandoned on 23 April 1984 as a junk well.
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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