NORWAY · WELLBORES · NPDID 262
2/7-3
Exploration · Wildcat · P&A · Oil/gas · Phillips Petroleum Company Norway · Eldfisk · PL 018
2/7-3 is a wildcat exploration wellbore in the North Sea, drilled by Phillips Petroleum Company Norway, entered Apr 14, 1972, to 4,359 m in the Zechstein Gp.
Discovery 2/7-1 Eldfisk · On the map →
- 4,359
- m total depth
- 69
- m water depth
- Apr 14, 1972
- entered · completed Oct 11, 1972
- Zechstein Gp
- at total depth · Late Permian
- 19.8
- ft of core in 4 cores
- 134
- °C bottom-hole temperature
SODIR FACTPAGES · RECORD UPDATED NOV 4, 2026 · RELEASED OCT 11, 1974
On file for this wellbore
What the Directorate holds from this wellbore. Each opens the section that lists it.
Drilling
- Drilling facility
- ORION · Jack-up 3 legs
- Drilling days
- 181
- Kelly bushing elevation
- 28 m
- Maximum inclination
- 4.5°
- Drilling permit
- 68-L
- Licensing round
- 1-A
- Plugged and abandoned
- —
- Core samples available
- Yes
- Cuttings samples available
- No
- Position · ED50
- 56.38381° N, 3.24572° E
- Hydrocarbons in
- Ekofisk Fm · Paleocene
- Hydrocarbons in
- Tor Fm · Late Cretaceous
- Hydrocarbons in
- Eldfisk Fm · Late Jurassic
Well history
WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE
General
Well 2/7-3, was drilled on the southern compartment of the Eldfisk structure in the North Sea. The Eldfisk structure is a NNW-SSE trending partly salt-related anticlinal structure located between the Valhall and Embla fields to the south and the Ekofisk Field to the north. The primary objectives were to test the Danian Limestone, and the possibility of Jurassic sandstone development on the crest of the Eldfisk structure. Both objectives were expected to be ca 120 m thick. The Late Cretaceous carbonate, lower Cretaceous sandstones and Triassic sandstones were secondary objectives.
Operations and results
Wildcat well 2/7-3 was spudded with the jack-up installation Orion on the 14 April 1972 and drilled to TD at 4359 m in the Permian Zechstein Group. Note that the Daily Report records Decca final fix as 56° 23' 01.7"N, 03° 14' 44.6"E, 60 meters off desired location, while other parts of the Completion Report seems to record the coordinates of the slightly different planned well location. The well was drilled with seawater and hi-vis sweeps down to 482 m, with gypsum-CMC lignosulphonate mud from 482 m to 3195 m, and with salt saturated gypsum-CMC lignosulphonate mud from 3195 m to TD. Between 482 m and TD diesel was added to the mud.
The Danian section was 90 m thick, highly fractured, and yielded commercial quantities of oil. Logs and two drill stem tests (DST 1 and DST 2) in the Late Cretaceous rocks indicated low porosity and permeability. One hundred and fifty gross meter of Jurassic sandstones was penetrated in the well. Log analysis indicated the sands are very shaly and silty. Three of the sidewall cores from this interval were described as hard, black shale and the fourth as a very calcareous sandstone. Although the logs
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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