Estimates of undiscovered conventional oil and gas resources in the United States; a part of the Nation's energy endowment

Two agencies of the U.S. Department of the Interior, the U.S. Geological Survey (USGS) and the Minerals Management Service (MMS), recently completed this assessment of the undiscovered conventionally recoverable oil and natural gas resources of the United States. It considers new geological, technological and economic information and uses more definitive methods of resource appraisal than previous assessments. This paper presents this assessment which was conducted over a period of more than two years and reflects data and information available as of January 1, 1987.