NORWAY · WELLBORES · NPDID 7491
30/9-26 S
Exploration · Appraisal · P&A · Oil · Statoil Petroleum AS · Oseberg · PL 079
30/9-26 S is an appraisal exploration wellbore in the North Sea, drilled by Statoil Petroleum AS, entered Nov 10, 2014, to 4,568 m in the Tarbert Fm.
Discovery 30/9-19 · On the map →
- 4,568
- m total depth · 3,367 m vertical
- 104
- m water depth
- Nov 10, 2014
- entered · completed Nov 22, 2014
- Tarbert Fm
- at total depth · Middle Jurassic
- —
- m of core
- —
- °C bottom-hole temperature
SODIR FACTPAGES · RECORD UPDATED FEB 20, 2026 · RELEASED NOV 22, 2016
On file for this wellbore
What the Directorate holds from this wellbore. Each opens the section that lists it.
Drilling
- Drilling facility
- SONGA DELTA · Semisub steel
- Drilling days
- 13
- Kelly bushing elevation
- 29 m
- Maximum inclination
- 57.20000076°
- Drilling permit
- 1519-L
- Licensing round
- Awarded additionally to round 6
- Plugged and abandoned
- —
- Core samples available
- No
- Cuttings samples available
- No
- Position · ED50
- 60.45689° N, 2.69516° E
- Hydrocarbons in
- Tarbert Fm · Middle Jurassic
Well history
WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE
General
Well 30/9-26 S was drilled on the Oseberg Delta 2 south-west of the Oseberg Main field. The primary objective of the exploration pilot was to investigate HC-potential and pressure in the Tarbert Formation in the S1-segment.
Operations and results
Appraisal well 30/9-26 S was kicked off from below the 14'' shoe at 3003 m (2441 m TVD) in development well 30/9-P-1 H on 10 November 2014. It was drilled with the semi-submersible installation Songa Delta to TD at 4568 m (3367 m TVD) in the Middle Jurassic Tarbert Formation. Operations proceeded without significant problems. The well was drilled with Enviromul oil based mud from kick-off to TD.
Top Tarbert Formation came in at 4460 m (3226 m TVD). The Tarbert Formation reservoir appeared as layered sands separated by silty and shaly layers rather than the 40-50 m thick and continuous sand package that was anticipated. The Middle Tarbert reservoir sands proved to be severely pressure depleted. The Middle Tarbert 2.3 pressure was ca 195 bar and the Middle Tarbert 2.1 pressure was ca 180 bar. This correspond to depletions of 170 bar and 155 bar respectively, in these two sands compared to the virgin pressure in well 30/9-21 S. The OWC in 30/9-26 S was identified at 4434 m (3271 m TVD). No shows analysis was performed because oil-based mud was used to drill the well.
No cores were cut. No fluid sample was taken.
The well was permanently abandoned on 22 November 2016 as an oil appraisal well.
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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