NORWAY · WELLBORES · NPDID 897
7120/1-1 R2
Exploration · Wildcat · P&A · Oil/gas shows · A/S Norske Shell · PL 108
7120/1-1 R2 is a wildcat exploration wellbore in the Barents Sea, drilled by A/S Norske Shell, entered Mar 13, 1986, to 4,003 m in the Basement.
- 4,003
- m total depth · 3,978 m vertical
- 342
- m water depth
- Mar 13, 1986
- entered · completed Jul 21, 1986
- Basement
- at total depth · Pre-Devonian
- 11
- m of core in 2 cores
- 125
- °C bottom-hole temperature
SODIR FACTPAGES · RECORD UPDATED MAR 1, 2026 · RELEASED JUL 21, 1988
On file for this wellbore
What the Directorate holds from this wellbore. Each opens the section that lists it.
Drilling
- Drilling facility
- BORGNY DOLPHIN · Semisub steel
- Drilling days
- 126
- Kelly bushing elevation
- 25 m
- Maximum inclination
- 12.5°
- Drilling permit
- 480-L3
- Licensing round
- 9
- Plugged and abandoned
- Jul 21, 1986
- Core samples available
- Yes
- Cuttings samples available
- Yes
- Position · ED50
- 71.91690° N, 20.30198° E
Well history
WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE
General
Well 7120/1-1 was drilled on the Alpha structure in the north of block 7120/1. The primary objective of the well was to test Palaeozoic carbonates and elastics in a partly fault-bounded/truncated dip closure on the western flank of the Loppa High. Potential Early Triassic sandstones in a low relief dip closure were a secondary objective.
Operations
Well 7120/1-1 was spudded on 16 August with the semi-submersible installation "Borgny Dolphin" and drilled to 2569 m where it was suspended on 15 November due to NPD drilling regulations during winter season. On 2 December permission was granted to continue operations and drilling continued to 2610 m. On 26 December the well was again suspended at the request of the Norwegian Petroleum Directorate because of safety considerations in adverse weather conditions. The well was re-entered on 13 March 1986 and drilled to a TD of 4003 m in basement rocks. The well was drilled with seawater and bentonite hi-vis pills down to 485 m. From there to TD gypsum/polymer mud was used with various "Lost Circulation Material" pills to cure mud losses.
The well encountered weak hydrocarbon shows from 800 m down to 2200 m and oil shows in Late Permian carbonates (Tempelfjorden Group, Ørret Formation). No intervals of significant reservoir potential were recognized from logs or described from cuttings in the Tertiary or Triassic sections. Below this sequence, three main Permian carbonate units were identified from logs and cuttings description. A porosity range of 5-10% for the limestone sequence between 2415 and 2461 m has been derived from log evaluation. In the basal part of this interval, a black shale was detected with a gas peak of 13% total gas. The lower limestone in
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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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