31/5-4 AR

Exploration · Appraisal · Suspended · Oil/gas · Norsk Hydro Produksjon AS · Troll · PL 085

31/5-4 AR is an appraisal exploration wellbore in the North Sea, drilled by Norsk Hydro Produksjon AS, entered Jul 9, 1991, to 2,603 m in the Sognefjord Fm.

Discovery 31/2-1 (Troll Vest) · On the map →

2,603: m total depth · 1,579 m vertical
316: m water depth
Jul 9, 1991: entered · completed Jul 18, 1991
Sognefjord Fm: at total depth · Late Jurassic
—: m of core
69: °C bottom-hole temperature

SODIR FACTPAGES · RECORD UPDATED NOV 4, 2026 · RELEASED JUL 18, 1993

On file for this wellbore

What the Directorate holds from this wellbore. Each opens the section that lists it.

15Formation tops

Drilling

Drilling facility: TRANSOCEAN 8 · Semisub steel
Drilling days: 10
Kelly bushing elevation: 24 m
Maximum inclination: 93°
Drilling permit: 656-L2
Licensing round: Awarded additionally to round 7
Plugged and abandoned: —
Core samples available: Yes
Cuttings samples available: Yes
Position · ED50: 60.72116° N, 3.56196° E
Hydrocarbons in: Sognefjord Fm · Late Jurassic

Well history

WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE

General

Well 31/5-4 AR is a re-entry of the horizontal side track well 31/5-4 A in the Troll West oil and gas province.

Operationsand results

Well bore 31/5-4 A was re-entered (31/5-4 AR) with the semi-submersible installation Transocean 8 on 9 July 1991. The well was suspended on 18 July 1991.

Testing

No drill stem test was performed

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.

Developers: this page as JSON is GET /v1/data/norway/wells/1832, documented in the API reference.