Russian Prime Minister Vladimir Putin holds wide-ranging talks in Vienna with Austrian Chancellor Werner Faymann on Saturday.
After the talks, which are due to last around an hour, a document on Austria's joining the South Stream gas pipeline project is expected to be signed.
Russia's Gazprom and Austria's OMV are also due to sign a deal.
Putin and Faymann began their meeting with a conversation in German, a language the Russian premier speaks fluently.
The gas pipeline project is designed to carry 31 billion cubic meters of Russian natural gas a year across the Black Sea to Bulgaria and further on to Italy and Austria.
The pipeline is expected to go into operation in 2015, its capacity eventually reaching 63 bcm, or some 35% of Russian gas supplies to Europe.
Russia has already signed intergovernmental agreements with Bulgaria, Serbia, Hungary, Slovenia and Croatia to implement the onshore part of the project.
VIENNA, April 24 (RIA Novosti)