35/11-4 R

Exploration · Appraisal · P&A · Oil/gas · Mobil Exploration Norway INC · Fram · PL 090

35/11-4 R is an appraisal exploration wellbore in the North Sea, drilled by Mobil Exploration Norway INC, entered Nov 16, 1991, to 3,136.5 m in the Statfjord Gp.

Discovery 35/11-4 Fram · On the map →

3,136.5: m total depth · 3,135.5 m vertical
355: m water depth
Nov 16, 1991: entered · completed Jan 27, 1992
Statfjord Gp: at total depth · Early Jurassic
—: m of core
117: °C bottom-hole temperature

SODIR FACTPAGES · RECORD UPDATED NOV 4, 2026 · RELEASED JAN 27, 1994

On file for this wellbore

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

Drilling

Drilling facility: SOVEREIGN EXPLOR · Semisub steel
Drilling days: 73
Kelly bushing elevation: 26.5 m
Maximum inclination: 5.69999981°
Drilling permit: 642-L3
Licensing round: 8
Plugged and abandoned: Jan 27, 1992
Core samples available: No
Cuttings samples available: No
Position · ED50: 61.03331° N, 3.54822° E
Hydrocarbons in: Sognefjord Fm · Late Jurassic
Hydrocarbons in: Fensfjord Fm · Middle Jurassic
Hydrocarbons in: Brent Gp · Middle Jurassic

Well history

WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE

General

Well 35/11-4 discovered oil and gas in the Sognefjord and Fensfjord Formations and the Brent Group. The discovery was made by shows, logs, FMT pressure gradients and sampling using the dynamically positioned installation Yatzy. This re-entry, 35/11-4R, was made to appraise the 35/11-4 discovery by Drill Stem Testing.

Operations and results

Well 35/11-4R was entered with the semi-submersible installation Sovereign Explorer on 16 November 1991. This rig has an RKB of 27 m compared to 17 m for the rig Yatzy.

The well was permanently abandoned on 27 January 1992 as an oil and gas discovery.

Testing

Four drill stem tests were carried out, one in the oil zone of each of the Brent Group, Fensfjord, lower Sognefjord and upper Sognefjord reservoirs. DST's 1 (2686.7 - 2694.2 m), 2B (2296.1 - 2303.1 m) and 3 (2044.0 - 2056.0 m) flowed oil from the Brent, Fensfjord and lower Sognefjord reservoirs respectively. DST 4B (2010.0 - 2013.0 m) flowed oil and free gas from the upper Sognefjord Formation. Note that the test intervals here are referenced to the Sovereign Explorer RKB. Subtract ten meters to obtain the test intervals used in many of the 34/11-4R well reports, where the Yatzy RKB is used as datum.

Bottom-hole sampling was carried out in DST 1, sampling oil from the Brent Group to obtain samples for direct PVT analysis. Surface oil and gas sampling was carried out in all four DST's to obtain samples for recombination and PVT analysis.

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/1883, documented in the API reference.