Petroleum Displacement Act of 1981

Petroleum Displacement Act of 1981 - Amends the Powerplant and Industrial Fuel Use Act of 1978 to repeal certain prohibitions and limitations on the use of natural gas as a primary energy source in electric powerplants. Repeals the authority of the Secretary of Energy to prohibit the use of petroleum or natural gas or both: (1) as a primary energy source in electric powerplants where coal or alternate fuel capability exists; and (2) in excess of a minimal amount, in an electric powerplant in which it is feasible to use a mixture of petroleum or natural gas or an alternate fuel as a primary energy source.