34/10-19
Exploration · Appraisal · P&A · Dry · Den norske stats oljeselskap a.s · Gullfaks · PL 050
34/10-19 is an appraisal exploration wellbore in the North Sea, drilled by Den norske stats oljeselskap a.s, entered Oct 5, 1983, to 2,218 m in the Hegre Gp.
Discovery 34/10-1 Gullfaks · On the map →
- 2,218
- m total depth · 2,218 m vertical
- 193
- m water depth
- Oct 5, 1983
- entered · completed Dec 6, 1983
- Hegre Gp
- at total depth · Triassic
- 44.3
- m of core in 3 cores
- 70
- °C bottom-hole temperature
SODIR FACTPAGES · RECORD UPDATED MAR 1, 2026 · RELEASED DEC 6, 1985
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
- 63
- Kelly bushing elevation
- 22 m
- Maximum inclination
- 3.5°
- Drilling permit
- 392-L
- Licensing round
- Awarded additionally to round 3
- Plugged and abandoned
- —
- Core samples available
- Yes
- Cuttings samples available
- Yes
- Position · ED50
- 61.18635° N, 2.25849° E
Well history
WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE
General
Well 34/10-19 was drilled to investigate the southern section of the Gullfaks Phase II area. The primary objective was to penetrate the Cook sandstone above the oil water contact at 2118 m seen in well 34/10-9, and to improve the understanding of the reserve distribution in this part of the Gullfaks field. Secondary objective was the Statfjord sandstone.
Operations and results
Appraisal well 34/10-19 was spudded with the semi-submersible installation Ross Isle on 5 October 1983 and drilled to TD at 2218 m in the Triassic Hegre Formation. Shallow gas was encountered in a sand at 332 to 338 m. A 16" liner was required to stop gas flow between 20" and 30" casings. Several drilling breaks occurred in the 12 1/4" hole and lost circulation occurred in the 8 1/2" hole. The well was drilled with gel/seawater down to 8978 m, with gel/seawater/hi-vis pills from 978 m to 1494 m, and with gel/lignosulphonate/lignite mud from 1494 m to TD.
The upper sandstone part of the Cook formation (unit C3 and C2) was missing missing due to faulting and erosion. The lower Cook C1 unit was penetrated at 1779 m. This unit consists of dominantly claystones and it was water bearing. The sandstones of the Statfjord Formation were water bearing. Trace shows were recorded in the Hordaland Group on claystones from 960 m to 120 m and on claystone and on limestone from 1340 m to 1470 m. Trace to fair shows on siltstone, claystone and minor sandstones were recorded intermittently below 1470 m and down to 1861 m. No trace of hydrocarbons was seen below this depth.
Three cores were cut; one in the interval from 1763 in the Cromer Knoll Group to 1781.3 m in the Cook Formation, and two in
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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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