NORWAY · WELLBORES · NPDID 9404
35/10-7 A
Exploration · Appraisal · P&A · Oil · Equinor Energy AS · PL 630
35/10-7 A is an appraisal exploration wellbore in the North Sea, drilled by Equinor Energy AS, entered Dec 12, 2021, to 3,605 m in the Cook Fm.
Discovery 35/10-7 S (Toppand) · On the map →
- 3,605
- m total depth · 3,403 m vertical
- 354
- m water depth
- Dec 12, 2021
- entered · completed Dec 27, 2021
- Cook Fm
- at total depth · Early Jurassic
- 36.8
- m of core in 1 core
- 134
- °C bottom-hole temperature
SODIR FACTPAGES · RECORD UPDATED FEB 20, 2026 · RELEASED DEC 27, 2023
On file for this wellbore
What the Directorate holds from this wellbore. Each opens the section that lists it.
Drilling
- Drilling facility
- WEST HERCULES · Semisub steel
- Drilling days
- 16
- Kelly bushing elevation
- 31 m
- Maximum inclination
- 37°
- Drilling permit
- 1872-L
- Licensing round
- TFO2011
- Plugged and abandoned
- Dec 27, 2021
- Core samples available
- Yes
- Cuttings samples available
- Yes
- Position · ED50
- 61.01758° N, 3.29371° E
- Hydrocarbons in
- Brent Gp · Middle Jurassic
Well history
WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE
General
Well 35/10-7 A is a geological sidetrack to well 35/10-7 S. The35/10-7 S well discovered oil in the Ness and Etive formations, while the Oseberg Formation was dry with shows. The objective for drilling the 35/10-7A was to prove commercial hydrocarbons in the Oseberg Formation up flank on the structure.
Operations and results
Appraisal well 35/10-7 A kicked off at 1682 m in the main well on 12 December 2021. It was drilled with the semi-submersible installation West Hercules to TD at 3605 m (3402.8 m TVD) in the Early Jurassic Cook Formation. Operations proceeded without significant problems. The well was drilled with Exploradril oil-based mud from kick-off to TD.
Well 35/10-7 A found hydrocarbons in the Oseberg Formation in addition to condensate and oil in the Ness and Etive formations. A hydrocarbon-water contact was found at 3526 m (3325 m TVD) in the Oseberg Formation. PVT analysis classify the Oseberg hydrocarbons as a near-critical oil. The Cook Formation was dry with weak oil shows described as direct and cut fluorescence but no visible cut and no odour. Otherwise oil shows were observed only in the oil-bearing formations of the Brent Group.
One core was cut from 3391 to 3427 m with 102.2% recovery in the Ness Formation. MDT fluid samples were taken at 3396,5 m in the Ness Formation (oil), 3506 m in the Oseberg Formation (oil), and 3527 m in the Oseberg Formation (water).
The well was permanently abandoned on 27 December 2021 as an oil appraisal well.
Testing
No drill stem test was performe
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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