Linking Russia's pipelines to Norway's would involve building an undersea pipeline, he said, adding that Norway's own gas reserves will run out within eight years. Statoil and Norsk Hydro are two of the five foreign companies that Gazprom has shortlisted for participation in the $20-bn Shtokman development. The others are ConocoPhillips, ChevronTexaco, and Total. Russian gas giant Gazprom has said it will select one or more partners for the project this summer.