The Outer Continental Shelf (OCS) is a significant source of oil and gas for the Nation’s energy supply. Approximately 16 million (as of March 2017) leased OCS acres account for about 4 percent of America’s domestic natural gas production and about 18 percent of America’s domestic oil production. BOEM manages the Nation's OCS resources to ensure environmentally and economically responsible production and drilling and the timely removal of decommissioned production facilities.
The OCS areas of the United States are estimated to contain significant quantities of resources in yet-to-be-discovered oil and gas fields. The Bureau estimates of oil and gas resources in undiscovered fields on the OCS total about 90 billion barrels of oil and 327 trillion cubic feet of gas (2016 National Assessment, mean estimates).