Proved reserves of U.S. oil and natural gas in 2010 rose by the highest amounts ever recorded since the U.S. Energy Information Administration (EIA) began publishing proved reserves estimates in 1977.

• Net additions to proved reserves of crude oil plus lease condensate in 2010 totaled 2.9 billion barrels, surpassing the previous high of 1.8 billion barrels added in 2009 by 63 percent (Table 1).
• Net additions of wet natural gas in 2010 totaled 33.8 trillion cubic feet (Tcf), nearly 5 Tcf (17 percent) higher than the previous record of 28.8 Tcf, also added in 2009.