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The AAPG/Datapages Combined Publications Database

Tulsa Geological Society


Tulsa Geological Society Digest
Vol. 38 (1970-1971), Pages 28-28

Norway's Ekofisk Field—A Landmark in North Sea Basin Exploration: Abstract

Jack H. Lewis1


In seven years, the North Sea has passed from a little-known basin to an established major gas and oil province. Ekofisk Field, the first significant oil discovery, occurs on an elongated dome formed by diapiric movement of the deeper Permian salt. The Danian (basal Tertiary) limestone reservoir has been penetrated by four wells on the structure. Early studies show the limestone is a typical biomicrite consisting of coccoliths and foraminifera, probably deposited in a deep quiet-water environment. Formation tests in all wells indicate reservoir continuity and high production rates of low-sulfur 35° API oil. Commercial production will begin early next year by unusual use of conventional facilities.


Acknowledgments and Associated Footnotes

1 Phillips Petroleum Company, Bartlesville, Oklahoma

October 12, 1970

Copyright © 2006 by the Tulsa Geological Society