NORWAY · WELLBORES · NPDID 8500
35/10-4 A
Exploration · Wildcat · P&A · Oil · Equinor Energy AS · PL 630
35/10-4 A is a wildcat exploration wellbore in the North Sea, drilled by Equinor Energy AS, entered Oct 15, 2018, to 3,946 m in the Heather Fm.
Discovery 35/10-4 A (Gnomoria) · On the map →
- 3,946
- m total depth · 3,430 m vertical
- 363
- m water depth
- Oct 15, 2018
- entered · completed Nov 12, 2018
- Heather Fm
- at total depth · Late Jurassic
- 48.2
- m of core in 4 cores
- 128
- °C bottom-hole temperature
SODIR FACTPAGES · RECORD UPDATED MAR 27, 2026 · RELEASED NOV 12, 2020
On file for this wellbore
What the Directorate holds from this wellbore. Each opens the section that lists it.
Drilling
- Drilling facility
- DEEPSEA BERGEN decom · Semisub steel
- Drilling days
- 29
- Kelly bushing elevation
- 23 m
- Maximum inclination
- 48.59999847°
- Drilling permit
- 1712-L
- Licensing round
- TFO2011
- Plugged and abandoned
- Nov 12, 2018
- Core samples available
- Yes
- Cuttings samples available
- Yes
- Position · ED50
- 61.14873° N, 3.28472° E
- Hydrocarbons in
- Intra Heather Fm Ss · Late Jurassic
- Hydrocarbons in
- Intra Draupne Fm Ss · Late Jurassic
Well history
WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE
General
Well 35/10-4 A is a geological side-track to well 35/10-4 S on the Marflo Spur in the North Sea. It was drilled to test the Gnomoria prospect. The primary objective was to prove hydrocarbon-bearing sandstones of Kimmeridgian and Oxfordian age, in the Draupne and Heather formations. The secondary objective was to test the reservoir potential in the Callovian sequence below the Oxfordian sandstone reservoir.
Operations and results
Wildcat well 35/10-4 A was Kicked off from a milled window at 1661 to 1668 m in well 35/10-4 S on 15 October 2018. It was drilled with the semi-submersible installation Deepsea Bergen to TD at 3946 m in the Late Jurassic Heather Formation. Operations proceeded without significant problems. The well was drilled with XP-07 oil-based mud from kick-off to TD.
Well 35/10-4 A encountered top Intra-Draupne Formation sandstone at 3757 m (3274 m TVD). Top Heather Formation was encountered at 3820 m (3326 m TVD). A total of 126 m (104.1 m TVD) of Heather Formation sandstone and claystone was penetrated in the well. The upper ca 100 m of Heather consist of mainly sandstone. The core and thin
sections show high amounts of quartz cementation throughout the Intra-Draupne sand, with better zones in the Heather Formation. Oil was proven at 3824.2 m in the Heather sandstone by sampling. An oil-water contact is indicated by the logs to be at ca 3841 m, but an oil gradient could not be confirmed due to lack of valid pressure points. Oil shows were described on the cores and cuttings in the interval 3757 to 3864. Water was sampled at 3845.2 m.
The interval 3776.5 to 3825.6 m in the Intra Draupne and Heather sands was core
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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