BLM will work with the USGS on updating the undiscovered oil and gas
resource estimates for the NPR-A.
On May 14, 2002, the “U.S. Geological Survey 2002 Petroleum
Resource Assessment of the National Petroleum Reserve in Alaska (NPRA):
Play Maps and Technically Recoverable Resource Estimates,”
was released as Open-File Report 02-207 2002. http://geopubs.wr.usgs.gov/open-file/of02-207