NORWAY · WELLBORES · NPDID 4128
31/5-6
Exploration · Wildcat · P&A · Oil shows · Norsk Hydro Produksjon AS · PL 191
31/5-6 is a wildcat exploration wellbore in the North Sea, drilled by Norsk Hydro Produksjon AS, entered Jul 5, 2000, to 2,370 m in the Drake Fm.
- 2,370
- m total depth · 2,368 m vertical
- 328
- m water depth
- Jul 5, 2000
- entered · completed Jul 25, 2000
- Drake Fm
- at total depth · Early Jurassic
- —
- m of core
- —
- °C bottom-hole temperature
SODIR FACTPAGES · RECORD UPDATED FEB 20, 2026 · RELEASED JUL 25, 2002
On file for this wellbore
What the Directorate holds from this wellbore. Each opens the section that lists it.
Drilling
- Drilling facility
- SCARABEO 6 · Semisub steel
- Drilling days
- 21
- Kelly bushing elevation
- 26 m
- Maximum inclination
- 5.71000004°
- Drilling permit
- 979-L
- Licensing round
- 14
- Plugged and abandoned
- —
- Core samples available
- Yes
- Cuttings samples available
- Yes
- Position · ED50
- 60.72216° N, 3.35732° E
Well history
WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE
General
The objective for well 31/5-6 was to test the hydrocarbon potential of the Jurassic U-structure in PL 191 west of the Troll Field. The primary targets were to test the hydrocarbon potential of the Sognefjord and Fensfjord Formations of the Viking Group. Secondary targets were to test the hydrocarbon potential of the Brent Group and to test the possibility of hydrocarbons being present in the Våle Formation of the Rogaland Group.
Operations and results
Wildcat well 31/5-6 was spudded with the semi-submersible installation "Scarabeo 6" on 5 July 2000 and drilled to TD at 2370 m in the Early Jurassic Drake Formation. The well was drilled with spud mud down to 1201 m and with water based "Glydril" mud from 1201 m to TD. More than 400 m of upper Jurassic Viking Group sediments were penetrated in well 31/5-6 U-structure. About half of the Viking Group is composed of the sand-rich, shallow marine Sognefjord, Fensfjord and Krossfjord Formations; the remaining is assigned the Heather Formation and a very thin Draupne Formation. The potential Sognefjord and Fensfjord reservoirs were found water bearing, although weak shows were reported in the uppermost part of the Sognefjord Formation. The Brent Group was 126 m thick and consisted of the Tarbert, Ness, Etive, Rannoch and Oseberg formation equivalents. Also the Brent Group was found water bearing although weak shows were reported in the uppermost part of the Tarbert formation equivalent. No conventional cores were cut and no fluid samples were taken. The well was permanently abandoned as a dry well with shows on 25 July 2000.
Testing
No drill stem test was performed
Around this wellbore
This wellbore on Sodir FactPages → · Press release →
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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