16/4-12 is a wildcat exploration wellbore in the North Sea, drilled by Lundin Norway AS, entered Sep 19, 2021, to 2,171 m in the Zechstein Gp.
- 2,171
- m total depth · 2,171 m vertical
- 100.5
- m water depth
- Sep 19, 2021
- entered · completed Oct 8, 2021
- Zechstein Gp
- at total depth · Permian
- —
- m of core
- 86
- °C bottom-hole temperature
SODIR FACTPAGES · RECORD UPDATED FEB 20, 2026 · RELEASED APR 21, 2022
On file for this wellbore
What the Directorate holds from this wellbore. Each opens the section that lists it.
Drilling
- Drilling facility
- DEEPSEA STAVANGER · Semisub steel
- Drilling days
- 20
- Kelly bushing elevation
- 30 m
- Maximum inclination
- 1°
- Drilling permit
- 1835-L
- Licensing round
- TFO2018
- Plugged and abandoned
- Oct 8, 2021
- Core samples available
- Yes
- Cuttings samples available
- Yes
- Position · ED50
- 58.69758° N, 2.14743° E
Well history
WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE
General
Well 16/4-12 was drilled to test the Merckx prospect west of the 16/4-6 S Solveig discovery on the Utsira High in the North Sea. The primary objective was to test the reservoir properties and hydrocarbon potential of the Ty Formation. The secondary objective was to test the reservoir properties and hydrocarbon potential of the Zechstein Group.
Operations and results
A 9 7/8" pilot well 16/4-U-8 was drilled to 778 m to check for shallow gas. No shallow gas was seen.
Wildcat well 16/4-12 was spudded with the semi-submersible installation Deepsea Stavanger on 19 September 2021 and drilled to TD at 2171 m in the Permian Zechstein Group. Severe mud losses were experienced in the Zechstein Group with a total loss of 1353 m WBM, 68 m SW, 65 m brine and 96 m thixotropic cement. A total of 3.3 days was used to cure losses. The well was drilled with seawater and hi-vis pills down to 990 m, with Rheguard Prime oil-based mud from 990 m to 2043 m, and with Glydril Plus mud from 2043 m to TD.
Well 16/4-12 was dry at both target levels. Forty-eight metres of sandstone with good to very good reservoir quality was penetrated in the Ty Formation. In the secondary target, the well encountered 12 metres of dolomitic rocks of the Zechstein Group with poor to moderate reservoir quality. The well also encountered an interval of sandstone of possibly Jurassic/Triassic age between the Ty Formation and Top Zechstein Group. The interval was 15 metres thick with good to very good reservoir quality. The only hydrocarbon indication in the well was weak shows in a thin sandstone at 2020 m in the Lista Formation ("No odour, rare back carbonaceous material, spotty pale yellow direct fluorescence,
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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