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Chris Schenk
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2005 Assessment Updates

The main objective of the National Assessment of Oil and Gas Project is to assess and forecast the oil and natural gas endowment of the onshore United States. The last comprehensive National Assessment was completed by the USGS in 1995, and since 2000 the USGS has been re-assessing basins of the U.S. that are considered to be priorities for the new assessment rather than assessing all of the basins of the U.S. The maps ands tables accompanying this introduction represent the update to the National Assessment as of the end of September, 2005. As each basin is re-assessed, the assessment results are added to the tables, and these new values replace the assessment results from 1995.

The maps illustrate the mean values for undiscovered conventional, continuous, and coal-bed gas resources. The tables include the F95 and F5 values of the distributions of undiscovered resources in addition to the mean value.

Assessment Summary Tables

Total Oil and Gas Resources--(MS Excel) Sum of Conventional and Continuous

Conventional Oil and Gas Resources (MS Excel)

Continuous Oil and Gas Resources Summary (MS Excel) Including Coalbed Gas

Continuous Oil and Gas Resources Summary (MS Excel) Excluding Coalbed Gas

Coalbed Gas Resources (MS Excel)

Assessment Summary Maps

Mean Conventional Oil Resources (PDF 2.1 MB)

Mean Conventional Gas Resources (PDF 2.0 MB)

Total Mean Continuous Gas Resources (PDF 2.2 MB) Inclusive of Coalbed Gas

Total Mean Continuous Gas Resources (PDF 2.0 MB) Exclusive of Coalbed Gas

Mean Coalbed Gas Resources (PDF 1.2 MB)

Mean Continuous Oil Resources (PDF 1.2 MB)

Total Mean Oil Resources (PDF 2.0 MB)

Total Mean Gas Resources (PDF 2.2 MB)