NORWAY · WELLBORES · NPDID 8451
25/4-12 S
Exploration · Appraisal · Junked · Not applicable · Aker BP ASA · Alvheim · PL 203
25/4-12 S is an appraisal exploration wellbore in the North Sea, drilled by Aker BP ASA, entered Jun 3, 2018, to 525 m in the Nordland Gp.
Discovery 25/4-3 (Gekko) · On the map →
- 525
- m total depth · 525 m vertical
- 121
- m water depth
- Jun 3, 2018
- entered · completed Jun 6, 2018
- Nordland Gp
- at total depth
- —
- m of core
- —
- °C bottom-hole temperature
SODIR FACTPAGES · RECORD UPDATED FEB 20, 2026 · RELEASED JUN 6, 2020
On file for this wellbore
What the Directorate holds from this wellbore. Each opens the section that lists it.
Drilling
- Drilling facility
- DEEPSEA STAVANGER · Semisub steel
- Drilling days
- 4
- Kelly bushing elevation
- 30 m
- Maximum inclination
- 1.39999998°
- Drilling permit
- 1699-L
- Licensing round
- 15
- Plugged and abandoned
- —
- Core samples available
- No
- Cuttings samples available
- No
- Position · ED50
- 59.51089° N, 2.07424° E
Well history
WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE
General
Well 25/4-12 S was drilled to appraise the 25/4-3 Gekko discovery in the Vana Sub-basin in the North Sea. The primary objective was to confirm continuation of reservoir and hydrocarbons in the southern part of the Gekko structure. A geological side-track 25/4-12 A was planned after 25/4-12 S to test the northern part of the structure.
Operations and results
Appraisal well 25/4-12 S was spudded with the semi-submersible installation Deepsea Stavanger on 3 June 2018. It was drilled to 525 m in the Nordland Group where the bottom hole assembly became stuck and was lost in hole. The well was abandoned.
The well did not fulfil the objectives.
No cores were cut. No fluid sample was taken.
The well was permanently abandoned on 6 June 2018 as a junk well. Consequently, the planned 25/4-12 A was cancelled. The drilling facility was moved and replacement wells 25/4-13 S with side-track 25/4-12 A was initiated.
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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