25/4-11 is a wildcat exploration wellbore in the North Sea, drilled by Aker BP ASA, entered Aug 11, 2017, to 2,427 m in the Heimdal Fm.
- 2,427
- m total depth · 2,427 m vertical
- 112
- m water depth
- Aug 11, 2017
- entered · completed Aug 23, 2017
- Heimdal Fm
- at total depth · Paleocene
- —
- m of core
- —
- °C bottom-hole temperature
SODIR FACTPAGES · RECORD UPDATED FEB 20, 2026 · RELEASED MAY 8, 2018
On file for this wellbore
What the Directorate holds from this wellbore. Each opens the section that lists it.
Drilling
- Drilling facility
- MAERSK INTERCEPTOR · Jack-up 3 legs
- Drilling days
- 13
- Kelly bushing elevation
- 55 m
- Maximum inclination
- 1.70000005°
- Drilling permit
- 1666-L
- Licensing round
- TFO2012
- Plugged and abandoned
- —
- Core samples available
- Yes
- Cuttings samples available
- Yes
- Position · ED50
- 59.74970° N, 2.15518° E
Well history
WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE
General
Well 25/4-11 was drilled to test the Hyrokkin prospect in the Volve Sub-basin in the North Sea, between the Frigg and Heimdal fields. The primary objective was to evaluate the hydrocarbon potential of the Heimdal Formation.
Operations and results
Wildcat well 25/4-11 was spudded with the jack-up installation Mærsk Interceptor on 11 August 2017 and drilled to TD at 2427 m in the Paleocene Heimdal Formation. Operations proceeded without significant problems. The well was drilled with Seawater and bentonite sweeps down to 222 m, with Glydrill WBM down to 1348 m and with EMS4600 oil-based mud from 1348 m to TD.
Top of the target Heimdal Formation was encountered at 2337 m. Ninety metres gross Heimdal sandstone with a few claystone layers was drilled down to TD. A net/gross ratio of 0.89 with 30% average porosity was found from petrophysical evaluation. The reservoir was water wet. There were no shows above the oil-based mud in the well.
No logs were run on wire line, no cores were cut, and no fluid sample was taken.
The well was permanently abandoned on 23 August 2017 as a dry well.
<span lang=EN-GB style='mso-ansi-language:EN-
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.
Developers: this page as JSON is GET /v1/data/norway/wells/8227, documented in the API reference.