The Bulgarian government lifted all restrictions on gas supplies to companies and households on Tuesday after announcing the end of its gas crisis.
Prime Minister Sergey Stanishev also vowed to seek alternative gas sources and reduce the country's almost total dependence on Russian natural gas.
"There is no more need for restrictions of gas supplies to the economy and they will be lifted with immediate effect," Stanishev told a news conference.
Bulgaria was one of the worst hit countries by the Russia-Ukraine gas row, which led to Russian gas being cut to consumer countries in Europe for two weeks.
Sofia imposed gas rationing on 357 big companies in order to save gas for heating and households. Another 44 major companies shut down production.
According to economy and energy ministry estimates, the direct losses from the crisis totalled 169 million leva (EUR86.4 million).
A total of 13 million cubic metres of gas were fed into Bulgaria's gas network on Wednesday, including 8.7 million cubic metres from Russia. The remainder was made up of emergency gas shipments from Greece plus Bulgaria's own stocks.
During the two weeks of the crisis, Bulgaria would normally have received around 123.8 million cubic metres of gas and Stanishev said state company Bulgargaz "will seek compensation in the form of supplementary volumes of gas at a reduced price."
Sofia would join other E.U. governments in a "joint effort to secure legitimate compensation," the premier said.