6305/5-3 S

Exploration · Appraisal · P&A · Gas · A/S Norske Shell · Ormen Lange · PL 209

6305/5-3 S is an appraisal exploration wellbore in the Norwegian Sea, drilled by A/S Norske Shell, entered Aug 19, 2009, to 2,954 m in the Springar Fm.

Discovery 6305/5-1 Ormen lange · On the map →

2,954: m total depth · 2,837 m vertical
832: m water depth
Aug 19, 2009: entered · completed Oct 27, 2009
Springar Fm: at total depth · Late Cretaceous
—: m of core
—: °C bottom-hole temperature

SODIR FACTPAGES · RECORD UPDATED SEP 25, 2026 · RELEASED OCT 27, 2011

On file for this wellbore

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

Drilling

Drilling facility: LEIV EIRIKSSON · Semisub steel
Drilling days: 70
Kelly bushing elevation: 25 m
Maximum inclination: 24.89999962°
Drilling permit: 1246-L
Licensing round: 15
Plugged and abandoned: Jul 28, 2012
Core samples available: Yes
Cuttings samples available: Yes
Position · ED50: 63.58160° N, 5.41872° E
Hydrocarbons in: Egga Fm (informal) · Paleocene

Well history

WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE

General

Well 6305/5-3 S was drilled on the north-eastern flank of the Ormen Lange Field in the Norwegian Sea. The well had three objectives: to appraise the Egga Reservoir Unit and Springar Formation for fluid content and reservoir quality; to investigate the extent of pressure communication between the C-Template area and the A- and B -Template

area within the Egga Reservoir Unit; and to test possible hydrocarbon potential in the overlying Tare Formation

Operations and results

Appraisal well 6305/5-3 S was spudded with the semi-submersible installation Leiv Eirikson on 19 August 2009 and drilled to TD at 2954 m (2837 m TVD) in the Late Cretaceous Springar Formation. Due to junk in the hole when drilling out of the 20" a technical sidetrack was made (6305/5-3 ST2); otherwise operations went forth without significant problems. The well was drilled with seawater and hi-vis pills down to 1651 m and with Glydril mud from 1651 m to TD.

Top of the Egga Reservoir Unit was encountered at 2797 m (2693.9 m TVD) and was 31 m TVD thick. This was 27 m deeper and 6 m thinner than prognosed. Pressure testing and down hole fluid analysis established the GWC to within 1.9 m. The Gas-Down-To (GDT) was determined at 2678.7 m TVD MSL and the Water-Up-To (WUT) at 2680.6 m TVD MSL. This is about 176 m shallower than the DHI in segment 3. The net/gross came in on the lower end of the prognosis, while the porosity was close to the prognosed. The pressure of the Egga gas-leg was some 3 bar lower than the virgin Ormen Lange gas pressure at this depth, indicating depletion and hence connectivity to the producers of the A and B templates. The Springar and Tare Formation reservoir properties proved to be v

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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