May be of interest:

Map of Assessed Continuous (Unconventional) Oil Resources in the United States, 2014  

Table 1 is quite popular: http://pubs.usgs.gov/dds/dds-069/dds-069-jj/downloads/table_1.pdf 

Many researchers prefer a stand alone copy; one can obtain a CD-ROM of this report by contacting: [log in to unmask]

Other info: 

USGS World Petroleum Assessments: http://energy.usgs.gov/OilGas/AssessmentsData/WorldPetroleumAssessment.aspx

USGS National Oil and Gas Assessments: http://energy.usgs.gov/OilGas/AssessmentsData/NationalOilGasAssessment.aspx

Energy Data search:

Enjoy the day,

Emily Wild
Librarian (Physical Scientist)
U.S. Geological Survey
Denver Library
Box 25046, MS 914
Denver Federal Center
Denver, CO 80225-0046
ph: (303) 236-1003
[log in to unmask]

USGS Libraries: http://library.usgs.gov
Tutorials: http://tinyurl.com/lh3tmua
Professional Page: http://profile.usgs.gov/ecwild