31/2-21 S

Exploration · Wildcat · P&A · Dry · Tullow Oil Norge AS · PL 550

The lithostratigraphic units 31/2-21 S 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	—	380	895
Utsira Fm	Formation	Nordland Gp	796	895
Hordaland Gp	Group	—	895	1,558
Rogaland Gp	Group	—	1,558	2,004
Balder Fm	Formation	Rogaland Gp	1,558	1,606
Sele Fm	Formation	Rogaland Gp	1,606	1,664
Lista Fm	Formation	Rogaland Gp	1,664	1,968
Våle Fm	Formation	Rogaland Gp	1,968	2,004
Shetland Gp	Group	—	2,004	2,059
Jorsalfare Fm	Formation	Shetland Gp	2,004	2,059
Viking Gp	Group	—	2,059	2,932
Draupne Fm	Formation	Viking Gp	2,059	2,180
Heather Fm	Formation	Viking Gp	2,180	2,191.5
Sognefjord Fm	Formation	Viking Gp	2,191.5	2,562
Fensfjord Fm	Formation	Viking Gp	2,562	2,932
Brent Gp	Group	—	2,932	3,074
Ness Fm	Formation	Brent Gp	2,932	2,998
Etive Fm	Formation	Brent Gp	2,998	3,012.5
Rannoch Fm	Formation	Brent Gp	3,012.5	3,032
Oseberg Fm	Formation	Brent Gp	3,032	3,074
Dunlin Gp	Group	—	3,074	3,217
Drake Fm	Formation	Dunlin Gp	3,074	3,123
Cook Fm	Formation	Dunlin Gp	3,123	3,217

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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