NORWAY · WELLBORES · NPDID 6142
33/9-21 B
Exploration · Appraisal · P&A · Oil · Wintershall Norge ASA · PL 037 D
33/9-21 B is an appraisal exploration wellbore in the North Sea, drilled by Wintershall Norge ASA, entered Apr 30, 2009, to 6,882 m in the Ness Fm.
Discovery 33/9-6 DELTA · On the map →
- 6,882
- m total depth · 3,038 m vertical
- 156.1
- m water depth
- Apr 30, 2009
- entered · completed Jun 11, 2009
- Ness Fm
- at total depth · Middle Jurassic
- —
- m of core
- —
- °C bottom-hole temperature
SODIR FACTPAGES · RECORD UPDATED FEB 20, 2026 · RELEASED JUN 11, 2011
On file for this wellbore
What the Directorate holds from this wellbore. Each opens the section that lists it.
Drilling
- Drilling facility
- MURCHISON A · Jacket 12 legs
- Drilling days
- 43
- Kelly bushing elevation
- 56.4 m
- Maximum inclination
- 94.90000153°
- Drilling permit
- 1254-L
- Licensing round
- Awarded additionally to round 2-A
- Plugged and abandoned
- —
- Core samples available
- No
- Cuttings samples available
- No
- Position · ED50
- 61.39674° N, 1.74090° E
- Hydrocarbons in
- Brent Gp · Middle Jurassic
Well history
WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE
General
The Delta discovery, made by well 33/9-6 in 1976, is situated approximately 4.5 km east of the Murchison platform. Well 33/9-6 had good oil shows, but was not tested due to mechanical problems. An oil down-to at 2998 m TV DSS corresponding to the top Mid Ness shale was seen in the well. The well had moderate reservoir quality within the Tarbert/Ness Formations, and excellent reservoir quality within the water-bearing Etive Formation.
Appraisal well 33/9-21 S confirmed the reservoir properties found in 33/9-6 and found OWC within the Etive Formation.
The horizontal sidetrack 33/9-21 A was drilled to further appraise the oil-bearing sands, but discovered that the reservoir dipped downwards so that the Etive Formation came below the OWC.
The objective with well bore 33/9-21 B was to reach the Etive sand at 6513.6 m and drill it horizontally.
The well was drilled from the Murchison Platform on the UK side of the border, where the well name is UK211/19a-M75x.
Operations and results
Appraisal well 33/9-21 B was kicked off on 30 April 2009 at 6222 m (2980 m TVD SS) in well 33/9-21 A. Kick-off point was in the Ness Formation. The well was drilled as a horizontal producer and reached TD at 6882 m (2982 m TVD SS) in the stratigraphically younger Late Jurassic Heather Formation. The well was drilled with Versaclean oil based mud from kick-off to TD.
The Etive could never be identified on the logs or in the samples and a water bearing Ness Formation Sand encountered at 6621.8 m made clear that the OWC was higher than prognosed. The d
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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