7120/1-2

Exploration · Wildcat · P&A · Oil · A/S Norske Shell · PL 108

7120/1-2 is a wildcat exploration wellbore in the Barents Sea, drilled by A/S Norske Shell, entered Jan 1, 1989, to 2,630 m in the Fruholmen Fm.

Discovery 7120/1-2 · On the map →

2,630: m total depth · 2,613 m vertical
304.5: m water depth
Jan 1, 1989: entered · completed Mar 28, 1989
Fruholmen Fm: at total depth · Late Triassic
25.5: m of core in 4 cores
77: °C bottom-hole temperature

SODIR FACTPAGES · RECORD UPDATED MAR 1, 2026 · RELEASED MAR 28, 1991

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: 87
Kelly bushing elevation: 23.5 m
Maximum inclination: 17.79999924°
Drilling permit: 599-L
Licensing round: 9
Plugged and abandoned: —
Core samples available: Yes
Cuttings samples available: Yes
Position · ED50: 71.79140° N, 20.27861° E
Hydrocarbons in: Knurr Fm · Early Cretaceous
Hydrocarbons in: Hekkingen Fm · Late Jurassic

Well history

WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE

General

Block 7120/1 is situated on the southern margin of the Loppa High and is bisected by the east-west trending Southern Loppa High boundary fault, which separates the Loppa High from the Hammerfest Basin to the south. The main objective of well 7120/1-2 was two seismostratigraphically defined wedges (of inferred Aptian age) in a large fault-bound closure against the Loppa High. Additional objectives were provided by a lower wedge of inferred Hauterivian age and Early Jurassic/Late Triassic elastics truncated beneath the Base Cretaceous unconformity, both down dip from the structural culmination.

Operations and results

The well spudded with the semi-submersible installation Ross Rig on 1 January 1989 and drilled to a total depth of 2630 m in Late Triassic sediments of the Fruholmen Formation. No shallow gas was encountered at any depth. The rig had to be moved three times due to problems with boulders that increased the hole inclination too much. Rough weather conditions, with waves exceeding 16 m, delayed drilling with several days. The well was drilled with seawater and spud mud down to 617 m and with KCl /Polymer mud from 617 m to TD.

Well 7120/1-2 penetrated two seismically defined "wedges" which contained three distinct clastic packages. The uppermost wedge (Wedge I from1585 m to1826 m) was dated as Early to Middle Albian in age, whilst the lower hydrocarbon-bearing wedge contains two units of latest Ryazanian / Early Valanginian (Wedge IIa from1878 m to 1984 m) and Early Volgian age (Wedge IIb from1984 m to 2138 m) respectively. These units had not previously been penetrated on the Barents Shelf.

Oil shows (direct fluorescence) was recorded on cuttings and cores in several intervals below 1931 m. Based on DST, logs, cores and RFT pressure measurements it was concluded that an oil column in excess of 90 m was encountered in Wedge IIa. Hydrocarbon saturations were considered reliable and although ave

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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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