Oil, gas resources estimated in the former Soviet Union

This report provides an assessment of undiscovered oil and gas resources in countries of the former Soviet Union. The assessments were made by participants of the World Energy Resources Program of the US Geological Survey using a modified Delphi (subjective) method and based on multiyear studies of the geology of FSU basins and exploration results. Reserves and undiscovered resources are allocated by basin to the newly independent states (NIS). Identified reserves have not been published, and the corresponding numbers in the table present a best guess'' based on reserves of the largest fields and/or basin production rates.