NORWAY · WELLBORES · NPDID 260
2/5-5
Exploration · Appraisal · P&A · Oil · Amoco Norway Oil Company · PL 006
2/5-5 is an appraisal exploration wellbore in the North Sea, drilled by Amoco Norway Oil Company, entered Dec 9, 1972, to 3,456 m in the Tor Fm.
Discovery 2/5-3 (Sørøst Tor) · On the map →
- 3,456
- m total depth
- 65
- m water depth
- Dec 9, 1972
- entered · completed Feb 9, 1973
- Tor Fm
- at total depth · Late Cretaceous
- 36.6
- ft of core in 2 cores
- 107
- °C bottom-hole temperature
SODIR FACTPAGES · RECORD UPDATED FEB 20, 2026 · RELEASED FEB 9, 1975
On file for this wellbore
What the Directorate holds from this wellbore. Each opens the section that lists it.
Drilling
- Drilling facility
- ZAPATA EXPLORER · Jack-up 3 legs
- Drilling days
- 63
- Kelly bushing elevation
- 36 m
- Maximum inclination
- 0°
- Drilling permit
- 81-L
- Licensing round
- 1-A
- Plugged and abandoned
- —
- Core samples available
- Yes
- Cuttings samples available
- Yes
- Position · ED50
- 56.58178° N, 3.43031° E
- Hydrocarbons in
- Tor Fm · Late Cretaceous
Well history
WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE
General
Well 2/5-5 was drilled ca 2 km southwest of the 2/5-3 S ør øst Tor Discovery well in the southern Norwegian North Sea. It was drilled to appraise the S ør øst Tor Discovery
Operations and results
Appraisal well 2/5-5 was spudded with the jack-up installation Zapata Explorer on 9 December 1972 and drilled to TD at 3456 m in the Late Cretaceous Tor Formation.
Top Paleocene was encountered at 3058 m, top Danian chalk (Ekofisk Formation) at 3176 m, and top Maastrichtian chalk (Tor Formation) at 3274 m. The only oil show reported above top Cretaceous was in thin dolomite stringers at 2940 - 2950 m. Oil shows were recorded in the Tor Formation from the top and down to 3383 m. Oil was confirmed by testing in the Tor Formation.
Two cores were cut in the interval 3284 - 3321 m in the Tor Formation. No wire line fluid sample was taken.
The well was permanently abandoned on 9 February 1973 as an oil appraisal.
Testing
Three drill stem tests were conducted in the Tor Formation. The following results are after acidizing:
DST 1 tested the interval 3428 - 3437 m in. At the end of the flow period only load water had come to surface and the pressure had dropped to zero.
DST 2 tested the interval 3355 - 3366 m. After 31 hours flow only acid and water cushion was produced to surface.
DST 3 tested the intervals 3297 to 3298 m + 3307 to 3308 + 3312.9 to 3313.5 m. This test produced 72 Sm3 oil, 12430 Sm3 gas, and 195 m3 water /day on a 64/64" choke. The GOR was 171 Sm3/Sm3 and the oil gravity was 39.4 deg API.
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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