This event will form part of a Norwegian-German energy and environment seminar being organised by Statoil, Norsk Hydro and the Statkraft power company on 4 October.
German federal chancellor Gerhard Schröder and Norwegian premier Jens Stoltenberg are to attend the celebration, which will be conducted via a direct link with the Åsgard B gas platform.
The Norwegian Sea development is one of several fields in these waters due to start delivering gas to Germany in the autumn.
Ten companies and organisations from Norway, including Statoil, are represented in the national pavilion at Expo 2000.
Each of these participants has paid NOK 4 million towards the total NOK 90 million being spent by Norway at the exposition.
The Stavanger Symphony Orchestra, which has Statoil as its principal sponsor, will be giving a concert in Hannover on 5 October. In addition, the Statoil Big Band is scheduled to perform.
Due to run to the end of October, Expo 2000 has attracted 192 countries and international organisations as participants.