31/2-5 R

Exploration · Appraisal · Suspended · Oil/gas · A/S Norske Shell · Troll · PL 054

The lithostratigraphic units 31/2-5 R drilled through, shallowest first, with the depth each was met and where it ended. Groups are in bold; the formations within them are indented.

Formation tops

LITHOSTRATIGRAPHY · METRES ALONG THE WELLBORE

Unit	Level	Part of	Top, m	Base, m
Nordland Gp	Group	—	358	781
Hordaland Gp	Group	—	781	1,338
No Formal Name	Formation	—	781	808
No Formal Name	Formation	—	808	1,338
Rogaland Gp	Group	—	1,338	1,525.5
Balder Fm	Formation	Rogaland Gp	1,338	1,389
Sele Fm	Formation	Rogaland Gp	1,389	1,418.5
Lista Fm	Formation	Rogaland Gp	1,418.5	1,525.5
Shetland Gp	Group	—	1,525.5	1,529
Viking Gp	Group	—	1,529	1,949.5
Sognefjord Fm	Formation	Viking Gp	1,529	1,610
Heather Fm	Formation	Viking Gp	1,610	1,685.5
Fensfjord Fm	Formation	Viking Gp	1,685.5	1,782
Krossfjord Fm	Formation	Viking Gp	1,782	1,853
Heather Fm	Formation	Viking Gp	1,853	1,949.5
Brent Gp	Group	—	1,949.5	2,062.5
Dunlin Gp	Group	—	2,062.5	2,397
Drake Fm	Formation	Dunlin Gp	2,062.5	2,194
Cook Fm	Formation	Dunlin Gp	2,194	2,270
Amundsen Fm	Formation	Dunlin Gp	2,270	2,301
Johansen Fm	Formation	Dunlin Gp	2,301	2,380
Amundsen Fm	Formation	Dunlin Gp	2,380	2,397
Statfjord Gp	Group	—	2,397	2,464
Hegre Gp	Group	—	2,464	2,525

About this data

Norwegian Offshore Directorate (Sodir) FactPages, mirrored nightly and used under the Norwegian Licence for Open Government Data (NLOD). Tops are the Directorate's lithostratigraphy for the wellbore, in metres along the wellbore from the kelly bushing. A unit filed as No Formal Name or No Group Defined is the Directorate's placeholder where nothing is named.

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