25/2-18 S

Exploration · Wildcat · P&A · Oil · Det norske oljeselskap ASA · Hugin Satellitter · PL 442

25/2-18 S is a wildcat exploration wellbore in the North Sea, drilled by Det norske oljeselskap ASA, entered Aug 6, 2016, to 3,887 m in the Drake Fm.

Discovery 25/2-18 S (Langfjellet) · On the map →

3,887: m total depth · 3,877 m vertical
121: m water depth
Aug 6, 2016: entered · completed Sep 11, 2016
Drake Fm: at total depth · Early Jurassic
127.7: m of core in 2 cores
129: °C bottom-hole temperature

SODIR FACTPAGES · RECORD UPDATED NOV 4, 2026 · RELEASED SEP 11, 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: 36
Kelly bushing elevation: 55 m
Maximum inclination: 8.80000019°
Drilling permit: 1634-L
Licensing round: TFO2006
Plugged and abandoned: —
Core samples available: Yes
Cuttings samples available: Yes
Position · ED50: 59.82503° N, 2.63169° E
Hydrocarbons in: Hugin Fm · Middle Jurassic

Well history

WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE

General

Well 25/2-18 S was drilled to test the Langfjellet prospect on the Bjørgvin Arch, four kilometers south of the 25/2-10 S (Frigg Gamma Delta) oil/gas discovery and eight kilometers north of the shutdown Frøy field in the North Sea. The objective of well 25/2-18 S was to prove petroleum in Middle Jurassic reservoir rocks belonging to the Vestland Group (the Hugin and Sleipner formations).

Operations and results

Wildcat well 25/2-18 S was spudded with the jack-up installation Mærsk Interceptor on 6 August 2016 and drilled to TD at 3820 m (3812.7 m TVD). A technical sidetrack, 25/2-18 ST2, was kicked off from 25/2-18 S at 3345 m. The sidetrack was drilled in order to perform data acquisition in accordance with NPD regulations. The sidetrack was drilled to final TD at 3887 m in the Early Jurassic Drake Formation. No significant problem was encountered in the operations. The well was drilled with seawater and hi-vis sweeps down to 450 m and with Versatec oil based mud from 450 m from 450 m to TD.

Top of target reservoir, Hugin Formation, was penetrated at 3431.5 m (3424.2 m TVD) in 25/2-18 S, and at 3433 m (3424.9 m TVD) in the 25/2-18 ST2 sidetrack. In the sidetrack, the formation had a gross oil column of 125 m with a down-to contact at 3563 m (3554 m TVD). Net-to-gross of the Hugin Formation is 0.46 in well 25/2-18 S and 0.69 in the sidetrack. The difference in net-gross is due to a higher degree of cementation in well 25/2-18 S than in the sidetrack. The two boreholes penetrate the Hugin Formation ca 15 m away from each other.

The OBM produced a show of weak, dull, light yellow, dir

Around this wellbore

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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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