31/7-3 A

Exploration · Appraisal · P&A · Oil/gas · Faroe Petroleum Norge AS · Bestla · PL 740

31/7-3 A is an appraisal exploration wellbore in the North Sea, drilled by Faroe Petroleum Norge AS, entered Dec 17, 2018, to 2,863 m in the Fensfjord Fm.

Discovery 31/7-1 Bestla · On the map →

2,863: m total depth · 2,278 m vertical
124: m water depth
Dec 17, 2018: entered · completed Jan 18, 2019
Fensfjord Fm: at total depth · Middle Jurassic
—: m of core
—: °C bottom-hole temperature

SODIR FACTPAGES · RECORD UPDATED NOV 4, 2026 · RELEASED JAN 18, 2021

On file for this wellbore

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

Drilling

Drilling facility: TRANSOCEAN ARCTIC · Semisub steel
Drilling days: 33
Kelly bushing elevation: 24 m
Maximum inclination: 0°
Drilling permit: 1746-L
Licensing round: TFO2013
Plugged and abandoned: Jan 18, 2019
Core samples available: Yes
Cuttings samples available: Yes
Position · ED50: 60.44517° N, 3.05381° E
Hydrocarbons in: Sognefjord Fm · Late Jurassic

Well history

WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE

General

Well 31/7-3 A was drilled as an appraisal well on the 31/7-1 Brasse discovery on the Bjørgvin Arch in the North Sea. The objective was to test the reservoir characteristics and identify the fluids contact in the north-western

part of the Brasse discovery.

Operations and results

Appraisal well 31/7-3 A was kicked of below the 13 3/8” casing shoe at 925 m in primary well bore 31/7-3 S on 17 December 2018. It was drilled with the semi-submersible installation Transocean Arctic to TD at 2863 m (2278 m TVD) in the Middle Jurassic Fensfjord Formation. At 2661 m in the top 8 ½” section the bit was damaged, causing 90 hrs NPT fishing for junk in hole. Otherwise, operations proceeded without significant problems. The well was drilled with Innovert oil-based mud from kick-off to TD.

The Sognefjord Formation came in at 2726 m (2154.6 m TVD). Sognefjord was predominantly siltstone and had poorer reservoir properties than expected. It was however hydrocarbon-bearing with GOC at 2740 m (2167 m TVD) and an ODT at 2792 m (2214 m TVD). MDT pressure data showed several fluid gradients, indicating differential depletion within a poorer quality Sognefjord formation reservoir compared to previous Brasse wells showing clearly defined gradients. No shows were recorded in the well, not even in the oil-bearing Sognefjord reservoir.

No cores were cut. Fluid samples were taken at 2730 m (gas), 2750 m (oil), 2771.26 m (oil) and 2791.5 m (oil).

The well was permanently abandoned on 18 January 2018 as an oil and gas appraisal.

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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.

Developers: this page as JSON is GET /v1/data/norway/wells/8644, documented in the API reference.