NORWAY · WELLBORES · NPDID 8957
25/7-9 S
Exploration · Wildcat · P&A · Dry · ConocoPhillips Skandinavia AS · PL 917
25/7-9 S is a wildcat exploration wellbore in the North Sea, drilled by ConocoPhillips Skandinavia AS, entered Jan 12, 2020, to 1,980 m in the Sele Fm.
- 1,980
- m total depth · 1,924 m vertical
- 126
- m water depth
- Jan 12, 2020
- entered · completed Feb 15, 2020
- Sele Fm
- at total depth
- —
- m of core
- —
- °C bottom-hole temperature
SODIR FACTPAGES · RECORD UPDATED MAY 20, 2026 · RELEASED FEB 15, 2022
On file for this wellbore
What the Directorate holds from this wellbore. Each opens the section that lists it.
Drilling
- Drilling facility
- LEIV EIRIKSSON · Semisub steel
- Drilling days
- 35
- Kelly bushing elevation
- 25 m
- Maximum inclination
- 0°
- Drilling permit
- 1801-L
- Licensing round
- TFO2017
- Plugged and abandoned
- Feb 15, 2020
- Core samples available
- Yes
- Cuttings samples available
- Yes
- Position · ED50
- 59.25476° N, 2.31437° E
Well history
WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE
General
Well 25/7-9 S was drilled to test the Hasselbaink prospect on the western margin of the Utsira High between the Balder Field and the 257/8 S discovery in the North Sea. The primary objective was to prove hydrocarbons in an Eocene injectite complex. The prospect was mapped to lie above the regional Balder Field OWC at 1760 m TVD SS. As such any sand above this level would in theory contain oil.
Operations and results
A 9-7/8" pilot hole was drilled at approximately 15 m offset to the planned spud location, to 520 m to investigate potential shallow gas and shallow water flow hazard. There was no evidence of shallow flows, gas, or water.
Wildcat well 25/7-9 S was spudded with the semi-submersible installation Leiv Eiriksson on 12 January 2020 and drilled to TD at 1980 m (1924.2 m TVD) in the Paleocene Hermod Formation. Operations proceeded without significant problems. The well was drilled with seawater and hi-vis pills down to 1055 m and with Innovert oil-based mud from 1055 m to TD.
25/7-9 S encountered two thin sandstone intervals, each of approximately one metre thickness in the prognosed reservoir interval in the Hordaland Group. The sands had very good reservoir properties and traces of petroleum.
Shows were observed in two samples; in the upper sandstone the lower Hordaland Group at 1770 m (stain, direct fluorescence, and a sharp peak in resistivity), and in claystone at 1833 m (direct and cut fluorescence) in the Balder Formation.
No cores were cut. No fluid sample was taken.
The well was permanently abandoned on 13.
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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