NORWAY · WELLBORES · NPDID 9403
35/10-7 S
Exploration · Wildcat · P&A · Oil · Equinor Energy AS · PL 630
35/10-7 S is a wildcat exploration wellbore in the North Sea, drilled by Equinor Energy AS, entered Nov 2, 2021, to 3,594 m in the Amundsen Fm.
Discovery 35/10-7 S (Toppand) · On the map →
- 3,594
- m total depth · 3,540 m vertical
- 354
- m water depth
- Nov 2, 2021
- entered · completed Dec 11, 2021
- Amundsen Fm
- at total depth · Early Jurassic
- 144.4
- m of core in 2 cores
- 137
- °C bottom-hole temperature
SODIR FACTPAGES · RECORD UPDATED FEB 20, 2026 · RELEASED DEC 11, 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
- 40
- Kelly bushing elevation
- 31 m
- Maximum inclination
- 19.5°
- Drilling permit
- 1871-L
- Licensing round
- TFO2011
- Plugged and abandoned
- Dec 11, 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 S was drilled to test the Toppand prospect on the Lomre Terrace in the North Sea. The primary objective was to Prove commercial hydrocarbons in the Etive and Oseberg formations (Brent Group) and Cook Formation
(Dunlin Group).
Operations and results
Wildcat well 35/10-7 S was spudded with the semi-submersible installation West Hercules on 2 November 2021 and drilled to TD at 3594 m (3540,6 m TVD) in the Early Jurassic Amundsen Formation. The well was drilled S-shaped, vertically through the target reservoirs section. In the 17 1/2" section a leak in the BSR was discovered. The BOP was pulled for repairs. This caused 5.5 days NPT. Otherwise operations proceeded without significant problems. The well was drilled with seawater and hi-vis pills down to 781 , with Glydril mud from 781 m to 1742 m, and with Exploradrill oil-based mud from 1742 m to TD.
Well 35/10-7 S found hydrocarbons in the Ness and Etive formations. The Oseberg and Cook Formations were dry. A hydrocarbon-down-to contact was found in the Etive Formation at 3374 m (3320 m TVD). PVT analyses show that the hydrocarbon fluids are in a near-critical state and that there is a gas-condensate phase over an oil leg. A mean gas-oil-contact (GOC) of 3294 m (3241 m TVD) has been estimated. In addition to shows in the hydrocarbon-bearing formations there were shows (petroleum odour, direct and cut fluorescence) in the interval 3405 to 3467 m in the Oseberg Formation.
Two cores were cut in succession from 3323 m to 3469 m in the Ness, Etive, Rannoch, Oseberg, and Drake formations. MDT fluid samples were taken at 3260.4 m in the Ness Formation (oil), 3320.2 m in
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.
Developers: this page as JSON is GET /v1/data/norway/wells/9403, documented in the API reference.