35/4-3 is a wildcat exploration wellbore in the North Sea, drilled by Aker BP ASA, entered Apr 8, 2022, to 4,707 m in the Cook Fm.
- 4,707
- m total depth · 4,707 m vertical
- 399
- m water depth
- Apr 8, 2022
- entered · completed May 17, 2022
- Cook Fm
- at total depth · Early Jurassic
- —
- m of core
- —
- °C bottom-hole temperature
SODIR FACTPAGES · RECORD UPDATED FEB 20, 2026 · RELEASED NOV 1, 2022
On file for this wellbore
What the Directorate holds from this wellbore. Each opens the section that lists it.
Drilling
- Drilling facility
- DEEPSEA NORDKAPP · Semisub steel
- Drilling days
- 40
- Kelly bushing elevation
- 32.7 m
- Maximum inclination
- 3.75°
- Drilling permit
- 1883-L
- Licensing round
- TFO2012
- Plugged and abandoned
- May 17, 2022
- Core samples available
- Yes
- Cuttings samples available
- Yes
- Position · ED50
- 61.67192° N, 3.11925° E
Well history
WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE
General
Well 35/4-3 was drilled to test the Laushornet in on Tampen Spur in the North Sea. The primary objective was to test the hydrocarbon potential in the Early Jurassic Cook Formation. The well was a drilled as High-Pressure High-Temperature well.
Operations and results
A Pilot hole 35/4-U-2 was spudded on 7 April and drilled to TD at 1163 m to check for shallow gas. No shallow gas was encountered.
Wildcat well 35/4-3 was spudded with the semi-submersible installation Deepsea Nordkapp on 8 April 2022 and drilled to TD at 4707 m in the Early Jurassic Cook Formation. Operations proceeded without significant problems. The only incident was a water-influx in the Cook Formation, which was killed with the drillers method. The well was drilled with seawater and hi-vis pills down to 1163 m, and with BARA ECD oil-based mud from 1163 m to TD.
The well encountered Cook Formation sandstone at 4412.7 m, 103 meter shallower than prognosis. The overlying Drake Formation shales, which had lower seismic velocities than expected, caused most of the deviation. The Cook-reservoir had much better quality than anticipated but was water-wet. There were no oil shows above the oil-based mud in the well. The most positive hydrocarbon indications were high gas readings in the interval 2510 2540 m in claystones in the Cretaceous Kyrre Formation, and hydrocarbons in side-wall core fluid inclusions in the Cook Formation at 4416 m, 4575 m, and 4617 m.
No conventional cores were cut. No fluid sample was taken.
The well was permanently abandoned on 17 May 2022 as a dry well.
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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