NORWAY · WELLBORES · NPDID 1031
25/1-7 R
Exploration · Appraisal · Suspended · Gas · Elf Petroleum Norge AS · Frigg · PL 024
25/1-7 R is an appraisal exploration wellbore in the North Sea, drilled by Elf Petroleum Norge AS, entered Feb 10, 1987, to 2,719 m in the Jorsalfare Fm.
Discovery 25/1-1 Frigg · On the map →
- 2,719
- m total depth · 2,718 m vertical
- 101
- m water depth
- Feb 10, 1987
- entered · completed Feb 14, 1987
- Jorsalfare Fm
- at total depth · Late Cretaceous
- —
- m of core
- —
- °C bottom-hole temperature
SODIR FACTPAGES · RECORD UPDATED FEB 20, 2026 · RELEASED FEB 14, 1989
On file for this wellbore
What the Directorate holds from this wellbore. Each opens the section that lists it.
Drilling
- Drilling facility
- NORTRYM · Semisub steel
- Drilling days
- 5
- Kelly bushing elevation
- 25 m
- Maximum inclination
- 3.70000005°
- Drilling permit
- 455-L2
- Licensing round
- 2-A
- Plugged and abandoned
- —
- Core samples available
- No
- Cuttings samples available
- No
- Position · ED50
- 59.91897° N, 2.08120° E
- Hydrocarbons in
- Frigg Fm · Eocene
Well history
WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE
General
Well 25/1-7 was drilled on the main Frigg structure close to the UK border. The Frigg Field was discovered by well 25/1-1 in 1971. Production from the field started in 1977. A main objective of well 25/1-7 was to establish a reference monitoring station for the production of gas from the Frigg Field. The objective of the re-entry 25/1-7 R was to record the fluid contacts.
Operations and results
Semi-submersible installation Nortrym arrived the 25/1-7 location on 8 February 1987. When attempting to connect to the well head a fishing net was found wrapped around it. This was removed, and the well was re-entered (25/1-/ R) on 10 February 1987.
The well was logged (2135 m - 1900 m) through casing with a Thermal Neutron Decay (TDT) log to determine the fluid contacts. The contacts found were: base of deepest gas at 1924 m MSL, top of highest oil at 1929.2 m MSL, and top of highest water at 1931.7 m MSL. From this it was concluded: 1) The gas oil contact has risen at least by 13 m from initial, and about 11 m of this rise occurred since the 19 April 1985; 2) A gas bearing sand zone located above the shaly barrier at -1939 m MSL between 1939 m MSL and 1929 m MSL has been swept; 3) The oil water contact has risen by 19 m since 19 April 1985.
The well was suspended on 26 May 1985 as a gas appraisal well.
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.
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