<P> In January 2015, President Barack Obama proposed to designate 12.28 million acres (4.97 million ha) of the refuge, including the coastal plain, as wilderness, prohibiting drilling . </P> <P> In 2017, the Republican - controlled House and Senate included in tax legislation a provision that would open the 1002 area of ANWR to oil and gas drilling . </P> <P> In 1998, the USGS estimated that between 5.7 and 16.0 billion barrels (2.54 × 10 m) of technically recoverable crude oil and natural gas liquids are in the coastal plain area of ANWR, with a mean estimate of 10.4 billion barrels (1.65 × 10 m), of which 7.7 billion barrels (1.22 × 10 m) lie within the Federal portion of the ANWR 1002 Area . In comparison, the estimated volume of undiscovered, technically recoverable oil in the rest of the United States is about 120 billion barrels (1.9 × 10 m). </P> <P> The ANWR and undiscovered estimates are categorized as prospective resources and therefore, not proven oil reserves . The United States Department of Energy (DOE) reports U.S. proved reserves are roughly 29 billion barrels (4.6 × 10 m) of crude and natural gas liquids, of which 21 billion barrels (3.3 × 10 m) are crude . A variety of sources compiled by the DOE estimate world proved oil and gas condensate reserves to range from 1.1 to 1.3 trillion barrels (170 × 10 ^ to 210 × 10 ^ m). </P>

How much additional oil would anwr provide to the us