NORWAY · WELLBORES · NPDID 505
31/2-1 R
Exploration · Wildcat · P&A · Oil/gas · A/S Norske Shell · Troll · PL 054
31/2-1 R is a wildcat exploration wellbore in the North Sea, drilled by A/S Norske Shell, entered Oct 26, 1981, to 2,434 m in the Hegre Gp.
Discovery 31/2-1 (Troll Vest) · On the map →
- 2,434
- m total depth · 2,434 m vertical
- 324
- m water depth
- Oct 26, 1981
- entered · completed Nov 9, 1981
- Hegre Gp
- at total depth · Late Triassic
- —
- m of core
- 65
- °C bottom-hole temperature
SODIR FACTPAGES · RECORD UPDATED NOV 4, 2026 · RELEASED NOV 9, 1983
On file for this wellbore
What the Directorate holds from this wellbore. Each opens the section that lists it.
Drilling
- Drilling facility
- BORGNY DOLPHIN · Semisub steel
- Drilling days
- 15
- Kelly bushing elevation
- 25 m
- Maximum inclination
- 0°
- Drilling permit
- 219-L2
- Licensing round
- 4
- Plugged and abandoned
- Nov 9, 1981
- Core samples available
- No
- Cuttings samples available
- No
- Position · ED50
- 60.77199° N, 3.55441° E
- Hydrocarbons in
- Sognefjord Fm · Late Jurassic
Well history
WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE
General
Well 31/2-1 R is the re-entry of well 31/2-1, the Troll West discovery well. Originally the re-entry was intended for testing of a possible oil zone, but this plan was dropped in favour of a DST in well 31/2-2, situated in a more optimal position with regard to a possible oil-leg. The only objective for 31/2-1 R was thus permanent plugging and abandonment.
Operations and results
Well 31/2-1 was re-entered (31/2-1 R) with the semi-submersible installation Borgny Dolphin on 26 October 1981.
The well was plugged and abandoned on 9 November 1981.
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.
Developers: this page as JSON is GET /v1/data/norway/wells/505, documented in the API reference.