3/7-11 S is a wildcat exploration wellbore in the North Sea, drilled by MOL Norge AS, entered Apr 17, 2019, to 3,893 m in the Rotliegend Gp.
- 3,893
- m total depth · 3,723 m vertical
- 66
- m water depth
- Apr 17, 2019
- entered · completed May 27, 2019
- Rotliegend Gp
- at total depth · Permian
- —
- m of core
- —
- °C bottom-hole temperature
SODIR FACTPAGES · RECORD UPDATED FEB 20, 2026 · RELEASED JAN 16, 2020
On file for this wellbore
What the Directorate holds from this wellbore. Each opens the section that lists it.
Drilling
- Drilling facility
- ROWAN VIKING · Jack-up 3 legs
- Drilling days
- 41
- Kelly bushing elevation
- 53 m
- Maximum inclination
- 0°
- Drilling permit
- 1756-L
- Licensing round
- TFO2009
- Plugged and abandoned
- May 27, 2019
- Core samples available
- Yes
- Cuttings samples available
- Yes
- Position · ED50
- 56.36346° N, 4.14577° E
Well history
WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE
General
Well 3/7-11 S was drilled to test the Otta and Vinstra prospects on the eastern flank of the Mandal High in the North Sea. The primary and secondary objectives were to prove petroleum in the Permian Vinstra aeolian reservoir in the Rotliegend Group, and the Middle Jurassic Otta sandstone reservoir (Bryne Formation), respectively.
Operations and results
Wildcat well 3/7-11 S was spudded with the jack-up installation Rowan Viking on 17 April 2019 and drilled to TD at 3893 m in the Permian Rotliegend Group. A 9 7/8” pilot hole was drilled to 840 m and no shallow gas or over-pressured water was observed. Operations proceeded without significant problems. The well was drilled with seawater and hi-vis pills down to 834 m and with EMS-4600 oil-based mud from 834 m to TD.
Top of the Otta prospect was found at 3585 m (3453.20 m TVD), and top of Vinstra at 3795 m (3637.10 m TVD). In the Otta target only minor sandstone stringers were present with low amounts of immoveable hydrocarbons as determined petrophysically, and minor to moderate HC odour on sidewall cores at 3606 to 3610 m. The Vinstra target in Rotliegend Group comprised siltstone and claystone without any hydrocarbon indication.
No cores were cut. No fluid sample was taken.
The well was permanently abandoned on 27 May 2019 as a dry well.
Testing
No drill stem test was performed.
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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