NORWAY · WELLBORES · NPDID 7941
35/8-6 A
Exploration · Wildcat · P&A · Oil · Wintershall Norge AS · PL 248
35/8-6 A is a wildcat exploration wellbore in the North Sea, drilled by Wintershall Norge AS, entered Apr 22, 2016, to 3,800 m in the Heather Fm.
Discovery 35/8-6 A (Robbins) · On the map →
- 3,800
- m total depth · 3,560 m vertical
- 381
- m water depth
- Apr 22, 2016
- entered · completed May 14, 2016
- Heather Fm
- at total depth · Late Jurassic
- 54.6
- m of core in 1 core
- —
- °C bottom-hole temperature
SODIR FACTPAGES · RECORD UPDATED FEB 20, 2026 · RELEASED MAY 14, 2018
On file for this wellbore
What the Directorate holds from this wellbore. Each opens the section that lists it.
Drilling
- Drilling facility
- BORGLAND DOLPHIN · Semisub steel
- Drilling days
- 23
- Kelly bushing elevation
- 31 m
- Maximum inclination
- 42.70000076°
- Drilling permit
- 1617-L
- Licensing round
- NST99
- Plugged and abandoned
- —
- Core samples available
- Yes
- Cuttings samples available
- Yes
- Position · ED50
- 61.32824° N, 3.33807° E
- Hydrocarbons in
- Intra Heather Fm Ss · Late Jurassic
Well history
WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE
Wellbore history
General
Well 35/8-6 A is a geological sidetrack to well 35/8-6 S on the Marflo Spur in the North Sea. It was drilled to test the Robins prospect, south of the 35/8-1 Vega North field. The Robbins prospect was identified in the Oxfordian section in the Vega North field, which is producing from the underlying Brent Group. Very thin Oxfordian sandstones were hydrocarbon bearing in the 35/8-1 Vega North discovery well, and the two Vega North production wells.
Operations and results
Wildcat well 35/8-6 A was kicked off from 1840 m in the 35/8-6 S well bore on 22 April 2016. It was drilled with the semi-submersible installation Borgland Dolphin to TD at 3800 m (3560 m TVD) m in the Late Jurassic Heather Formation. No significant problem was encountered in the operations. The well was drilled with Innovert oil based mud from kick-off to TD.
The target Intra Heather Formation Sandstone was encountered at 3560.5 m (3324.8 m TVD) with a 72.9 m TVD thickness and moderate to low quality reservoir quality. The upper part was oil filled, confirmed by an MDT oil sample at 3562 m. The free water level was estimated at 3566 m (3330 m TVD). Shows were however seen throughout the reservoir interval, indicating high residual oil saturation throughout.
One core was cut from 3567.5 to 3622.1 m with 101% recovery. MDT fluid samples were taken at 3562.02 m (light oil) and 3575.01 m (water with some residual oil).
The well was permanently abandoned on 14 May 2016 as an oil discovery.
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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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