6507/7-7

Exploration · Appraisal · Junked · Not applicable · Conoco Norway Inc. · Heidrun · PL 095

6507/7-7 is an appraisal exploration wellbore in the Norwegian Sea, drilled by Conoco Norway Inc., entered May 11, 1987, to 1,035 m in the Naust Fm.

Discovery 6507/7-2 Heidrun · On the map →

1,035: m total depth · 1,027 m vertical
335: m water depth
May 11, 1987: entered · completed Jun 7, 1987
Naust Fm: at total depth · Pliocene
—: m of core
—: °C bottom-hole temperature

SODIR FACTPAGES · RECORD UPDATED NOV 4, 2026 · RELEASED JUN 7, 1989

On file for this wellbore

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

Drilling

Drilling facility: TREASURE HUNTER · Semisub steel
Drilling days: 28
Kelly bushing elevation: 25 m
Maximum inclination: 4.80000019°
Drilling permit: 546-L
Licensing round: 8
Plugged and abandoned: —
Core samples available: Yes
Cuttings samples available: Yes
Position · ED50: 65.29785° N, 7.31407° E

Well history

WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE

General

Well 6507/7-7 was drilled on the southern flank of the Heidrun Field on the Halten Terrace. The primary objective was to appraise reserves in this part of the field. Further objectives were to obtain cores from the Tomma Formation (Fangst Group), to evaluate vertical communication between sandstone units in this section, and to obtain a water sample from the Aldra (Tilje) Formation.

Operations and results

Appraisal well 6507/7-7 was spudded with the semi-submersible installation Treasure Hunter on 11 May 1987. At 455 m the drill string backed off during a connection. Fishing was unsuccessful and an eighty-meter long fish was left in the hole. The rig was moved ca 20 m eastwards and re-spudded on 13 May. The well was drilled to 1035 m in Pliocene sediments (Naust Formation) where the 20" casing was run and cemented. While pulling out of the hole with the running string, the cement stinger unscrewed and fell into the casing. Fishing was again unsuccessful and the decision was made to plug and abandon. The well was drilled with seawater and gel all through.

Only MWD logs are available from the well. No cores were cut and no wire line fluid samples taken.

The well was permanently abandoned on 7 June 1987 as a junk well. Replacement well 6507/7-8 was spudded two days later.

Testing

No drill stem test was performed

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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