34/3-3 A

Exploration · Appraisal · P&A · Oil · BG Norge AS · Knarr · PL 373 S

34/3-3 A is an appraisal exploration wellbore in the North Sea, drilled by BG Norge AS, entered Nov 21, 2011, to 5,013 m in the Burton Fm.

Discovery 34/3-1 S Knarr · On the map →

5,013: m total depth · 3,962 m vertical
400: m water depth
Nov 21, 2011: entered · completed Jan 3, 2012
Burton Fm: at total depth · Early Jurassic
—: m of core
139: °C bottom-hole temperature

SODIR FACTPAGES · RECORD UPDATED FEB 20, 2026 · RELEASED JAN 3, 2014

On file for this wellbore

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

Drilling

Drilling facility: WEST ALPHA · Semisub steel
Drilling days: 44
Kelly bushing elevation: 18 m
Maximum inclination: 57.5°
Drilling permit: 1385-L
Licensing round: TFO2005
Plugged and abandoned: Jul 6, 2013
Core samples available: Yes
Cuttings samples available: Yes
Position · ED50: 61.79514° N, 2.71788° E
Hydrocarbons in: Cook Fm · Early Jurassic

Well history

WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE

General

Well 34/3-3 A is a sidetrack to well 34/3-3 S on the Jordbær Vest west of the Knarr field (formerly called Jordbær) in the northern part of the North Sea. The objective of the 34/3-3A sidetrack was to delineate the 34/3-3 S discovery by confirming the extent of reservoir rocks and also proving oil in the lower part of the Cook formation up-dip and north of well 34/3-3 S.

Operations and results

Appraisal well 34/3-3 A was kicked off at 2245 m in the primary well bore 34/3-3 S on 21 November 2011. It was drilled with the semi-submersible installation West Alpha to TD at 5013 m (3962 m TVD) in the Early Jurassic Burton Formation. It was drilled deviated with a sail angle of 57 deg to the Jordbær Vest A compartment of the Jordbær Vest structure. The well was drilled with Versatec oil based mud from kick-off to 4687 m and with Versatherm oil based mud from 4687 m to TD.

Sandstones belonging to the Cook Formation were penetrated at 4809 m (3840.4 m TVD). The Cook Formation consisted of two main sandstone packages. Light oil was encountered in the Upper Cook interval and this proved to be entirely oil-charged while the Lower Cook has a thin oil column and an observed Oil-Water contact (OWC) around 4874 m (3877.7 m TVD). Pressure survey data supported a Free Water Level (FWL) around 4876.2 m (3879 m TVD). Recorded formation pressures also proved that the Upper Cook reservoir has 1 bar (15 psi) lower pressu

Around this wellbore

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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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