16/1-16 A

Exploration · Appraisal · P&A · Oil · Wintershall Norge AS · Ivar Aasen · PL 457

16/1-16 A is an appraisal exploration wellbore in the North Sea, drilled by Wintershall Norge AS, entered Dec 7, 2012, to 2,897 m in the Skagerrak Fm.

Discovery 16/1-9 Ivar Aasen · On the map →

2,897: m total depth · 2,663 m vertical
113: m water depth
Dec 7, 2012: entered · completed Jan 1, 2013
Skagerrak Fm: at total depth · Triassic
—: m of core
—: °C bottom-hole temperature

SODIR FACTPAGES · RECORD UPDATED NOV 4, 2026 · RELEASED JAN 1, 2015

On file for this wellbore

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

Drilling

Drilling facility: BREDFORD DOLPHIN · Semisub steel
Drilling days: 26
Kelly bushing elevation: 25 m
Maximum inclination: 55°
Drilling permit: 1428-L
Licensing round: TFO2007
Plugged and abandoned: —
Core samples available: Yes
Cuttings samples available: Yes
Position · ED50: 58.91327° N, 2.26517° E
Hydrocarbons in: Hugin Fm · Middle Jurassic

Well history

WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE

General

Well 16/1-16 A is a geological sidetrack to well 16/1-16 on the east side of the Gudrun Terrace towards the Utsira High in the North Sea. The primary well bore 16/1-16 found oil in two slightly differently pressured compartments in the Middle Jurassic Hugin Formation and the Triassic Skagerrak Formation (Asha prospect). Both pressure compartments were penetrated in oil-down-to settings. The objective of the 16/1-16 A sidetrack was to find the true Asha OWC by drilling down flank on the structure to the south.

Operations and results

Well 16/1-16 A was kicked off at 2047 m in main bore 16/1-16 on 7 December 2012. It was drilled with the semi-submersible installation Bredford Dolphin to TD at 2897 m (2663 m TVD) in the Triassic Skagerrak Formation. No significant problem was encountered in the operations. The well was drilled with water based Performadril mud from kick-off to TD.

The well encountered more than 30 m gross oil in a Hugin Formation of very good quality and which is much thicker than in 16/1-16. Top Hugin was at 2527 m. The oil/water contact was encountered at 2592.8 m (2465 m TVD), 6 metres TVD deeper than the OWC found in the western part of the Ivar Aasen Field. The Lower oil zone in a Skagerrak sand with a separate pressure regime was not present or very little developed in 16/1-16 A compared to16/1-16.

No cores were cut in the well. MDT fluid samples were taken at 2573 m (oil) and at 2610.5 m (water)

The well was permanently abandoned on 1 January 2013 as an oil appraisal well.

Testing

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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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