Skip to Main Content
Book Chapter

U. S. Geological Survey Quantitative Petroleum Resource Appraisal Methodologies

Robert A. Crovelli
Robert A. Crovelli
U.S. Geological Survey Denver, Colorado
Search for other works by this author on:
January 01, 1986


A number of methodologies are described that provide estimates of volumes of undiscovered hydrocarbons. These include the direct assessment of undiscovered volumes of oil and gas and statistical methodologies that extrapolate the expected volumes to be found by future drilling from past performances. The latter include finding-rate studies expressed as decline curves and as cumulative resource curves, both of which provide a measure of undiscovered volumes to be found with additional drilling. Another technique described is the application of probability theory to the aggregate of a number of probability distributions under different dependency assumptions and the comparison of these results to those obtained by the use of Monte Carlo aggregation techniques. In the assessment of undiscovered amounts of oil and gas, where the estimates are based on little direct knowledge, the probability theory aggregation methodologies look very promising. The assessments of the United States, of the entire world, and of wilderness lands are discussed.

You do not currently have access to this article.
Don't already have an account? Register

Figures & Tables


AAPG Studies in Geology

Oil and Gas Assessment: Methods and Applications

Dudley D. Rice
Dudley D. Rice
Search for other works by this author on:
American Association of Petroleum Geologists
ISBN electronic:
Publication date:
January 01, 1986




A comprehensive resource of eBooks for researchers in the Earth Sciences

Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal