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The AAPG/Datapages Combined Publications Database

Tulsa Geological Society


Tulsa Geological Society Digest
Vol. 32 (1964), Pages 172-172

The Petroleum Potential of the Undrilled Areas of the USA: Abstract

A. I. Levorsen1


If we are to continue the current rates of petroleum demand and production, it will be necessary to obtain more petroleum during the next 37 years, or by 2000 A.D., than during the past 100 years. And if discovery of new deposits is to continue as the most important source of petroleum, then the question becomes: "Is there oil of that magnitude yet to be discovered within the United States?" This is a geological question.

Two approaches to the problem are considered. Both are based on the fact that as so often in the past, one or more of the chief ingredients for discovery may lie staring us in the face for years before being put into the discovery recipe.

The first may be thought of as a way of thinking. The petroleum industry has gradually developed a great many fine geological administrators who deal in reports from highly trained specialists—but these administrators move farther and farther away from the rocks, and the specialists become more specialized and more microscopic in their outlook. Needed are more experienced geologists, in between, who are still with the rocks and able to integrate the various specialized elements of structure, stratigraphy, and fluids into a recipe for discovery.

One integrated-type prospect consists of an arched, updip wedge of a potential reservoir rock, coupled with a downdip flow of the reservoir water. The flanks of every fold, large and small, from the surface to the basement, and in every sedimentary area, both productive and non-productive, offer innumerable opportunities for such petroleum discovery.

The second approach lies in the simple fact that many oil fields and oil provinces—including some of the largest—occur in close association with truncated reservoir rocks. Large volumes of potential reservoir rocks, with many unconformities, well known and staring us in the face, but as yet unexplored, are cited as potentially productive on a large scale.

The answer from this "Peek at the Deep" seems to be, "There is enough potential favorable geology to supply a normal expected demand, large though it may be." The big question that remains is, "Will there be sufficient incentive to do the exploring?" And this is in the realm of economics and politics.


Acknowledgments and Associated Footnotes

1 Consultant, Tulsa

March 9, 1964

Copyright © 2006 by the Tulsa Geological Society