NORWAY · WELLBORES · NPDID 2049
7128/4-1
Exploration · Wildcat · P&A · Oil/gas · Den norske stats oljeselskap a.s · PL 180
7128/4-1 is a wildcat exploration wellbore in the Barents Sea, drilled by Den norske stats oljeselskap a.s, entered Dec 17, 1993, to 2,530 m in the Basement.
Discovery 7128/4-1 (Omd Vest) · On the map →
- 2,530
- m total depth · 2,528.1 m vertical
- 370
- m water depth
- Dec 17, 1993
- entered · completed Feb 26, 1994
- Basement
- at total depth · Pre-Devonian
- 82.9
- m of core in 5 cores
- 82
- °C bottom-hole temperature
SODIR FACTPAGES · RECORD UPDATED MAR 1, 2026 · RELEASED FEB 26, 1996
On file for this wellbore
What the Directorate holds from this wellbore. Each opens the section that lists it.
Drilling
- Drilling facility
- ROSS RIG (2) · Semisub steel
- Drilling days
- 72
- Kelly bushing elevation
- 24 m
- Maximum inclination
- 4.80000019°
- Drilling permit
- 779-L
- Licensing round
- 13
- Plugged and abandoned
- —
- Core samples available
- Yes
- Cuttings samples available
- Yes
- Position · ED50
- 71.54093° N, 28.08169° E
- Hydrocarbons in
- Røye Fm · Late Permian
Well history
WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE
General
Well 7128/4-1 is located in the Finmark Øst area. The main objective for the well was to test the potential for hydrocarbons in Visean sandstone on the "Omd Vest" structure. The secondary objective was to test the hydrocarbon potential, reservoir and trap possibilities of the Asselian - Sakmarian carbonates and the upper Permian succession.
Operations
Exploration well 7128/4-1 was spudded with the semi-submersible installation "Ross Rig" on 17 December 1993 and drilled to TD at 2530 m in pre-Devonian basement rocks, 27 m below base of the Early Carboniferous Soldogg Formation. The well was drilled with seawater and bentonite / CMC EHV spud mud down to 770 m and with GYP/PAC mud from 770 m to TD.
The well penetrated Quaternary, Tertiary, Triassic, Permian, and Carboniferous sediments. The Cretaceous and Jurassic sequences were not present. Gas chromatography readings during drilling and log evaluation indicated gas saturation in the primary target. The sandstone was very tight and therefore not production tested. However, the Late Permian spiculite was partly very porous and permeable with a gas cap over moveable oil. A GOC was indicated at 1575 m.
A total of five conventional cores were cut in the well 1574 m t 1577 m (Late Permian Røye Formation), 1814 m to 1837 m (Isbjørn and Ørn Formations of Early Permian age), 1837 m to 1865 m (Early Permian Ørn Formation), 2362 m to 2389.47 m (Early Carboniferous Soldogg Formation), and 2526 m to 2530 m (Pre-Devonian basement).
FMT wire line samples were obtained from three levels: 1572.7 m, 1576 m, and 1588.8 m. In the FMT samples taken at 1572.7 m, the 10-
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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