The U.S. Geological Survey estimated volumes of potential additions to oil and gas reserves for the United States by reserve growth in discovered accumulations. These volumes were derived by using a new methodology developed by the U.S. Geological Surv
Klett, Timothy R. tklett@usgs.gov,Cook, Troy A.,Charpentier, Ronald R. charpentier@usgs.gov,et al. U.S. Geological Survey assessment of reserve growth outside of the United States. 2015-01-01.