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A Global Overview of Fields and Discoveries in Deep-water Deposits

By
Stephen P. J. Cossey
Stephen P. J. Cossey
1Cossey and Associates Inc., Durango, Colorado, USA
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Joseph R. J. Studlick
Joseph R. J. Studlick
2Maersk Oil Inc., Houston, Texas, USA
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Published:
January 01, 2008

Abstract

Since initial exploration success more than a century ago in onshore California, more than 872 discoveries with total reserves >137 billion barrels oil equivalent (BBOE) have been made in deep-water deposits. A rapid increase in such discoveries began in the 1970s and more than 350 are expected in this decade based on historic trends.

More than 80% of these discoveries are in offshore basins. North America dominates the number of total discoveries as well as reserves but there is an increasing number of African and Brazilian discoveries and fields. Reservoir rocks range in age from Ordovi-cian to Pleistocene. However, more than 90% are in Cretaceous or younger rocks. Passive margins have been the setting for most of these accumulations, and most are in slope depositional environments. However, recent technological advances allowing drilling in deeper waters will lead to more discoveries in lower slope to basin depositional environments. Further statistics on hydrocarbons, reservoir drive, trap types, porosity, and hydrocarbon column heights are discussed from a commercially available database compiled by Cossey and Associates Inc.

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Contents

AAPG Studies in Geology

Atlas of Deep-Water Outcrops

Tor H. Nilsen
Tor H. Nilsen
Desceased
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Roger D. Shew
Roger D. Shew
University of North Carolina
Wilmington, North Carolina
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Gary S. Steffens
Gary S. Steffens
Shell International E&P
Houston, Texas
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Joseph R. J. Studlick
Joseph R. J. Studlick
Maersk Oil America Inc.
Houston, Texas
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American Association of Petroleum Geologists
Volume
56
ISBN electronic:
9781629810331
Publication date:
January 01, 2008

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