NORWAY · WELLBORES · NPDID 2136
7/4-1
Exploration · Wildcat · P&A · Dry · Den norske stats oljeselskap a.s · PL 148
7/4-1 is a wildcat exploration wellbore in the North Sea, drilled by Den norske stats oljeselskap a.s, entered Jul 5, 1993, to 3,133 m in the Zechstein Gp.
- 3,133
- m total depth
- 82.5
- m water depth
- Jul 5, 1993
- entered · completed Aug 21, 1993
- Zechstein Gp
- at total depth · Late Permian
- 24.6
- m of core in 3 cores
- 128
- °C bottom-hole temperature
SODIR FACTPAGES · RECORD UPDATED MAR 27, 2026 · RELEASED AUG 21, 1995
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
- 48
- Kelly bushing elevation
- 23 m
- Maximum inclination
- 2.20000005°
- Drilling permit
- 763-L
- Licensing round
- 12
- Plugged and abandoned
- —
- Core samples available
- Yes
- Cuttings samples available
- Yes
- Position · ED50
- 57.73664° N, 2.19415° E
Well history
WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE
General
Well 7/4-1 was drilled on a structure lying on the northeastern flank of the Central Graben. The main objectives for the well were to test commercial reserves of hydrocarbons in the Upper Jurassic of the Alpha prospect and to establish the "Jæren High" Model analogy proven by the 7/7-2 discovery well.
Operations and results
Exploration well 7/4-1 was spudded with the semi-submersible installation "Deepsea Bergen" on 5 July1993 and drilled to TD at 3133 m, 50 m into rocks of the Permian Zechstein Group anhydrite. The well was drilled with seawater and viscous pills down to 926 m and with KCl / polymer / glycol mud from 926 m to TD.
Seventeen m of Late Jurassic sandstones were penetrated. No hydrocarbons were observed. Three cores were cut; one in the interval 2980 m ?2989 m in the Mandal Formation, the second in the interval 3015 m ? 3024 m in the Farsund Formation, and the third in the interval 3069 m - 3077 m in the Gyda Sandstone Member. No fluid samples were taken. The well was permanently abandoned as a dry well on 22 August 1993.
Testing
No drill stem test was performed.
Around this wellbore
This wellbore on Sodir FactPages →
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/2136, documented in the API reference.