The Russians being active abroad seems to confirm the suspicion that they have supply problems home. Russia may be again in decline or at least flat for the present. And nothing much to invest in at home.
Looking at project lead times, and the suggestion that Russia will go into decline by 2010, one might assume that this is ensuring some future supply for them.  On the other hand it buys them more influence in Africa and right now one might argue that oil is one of the best investments.  Given that they are profiting from their own sales, this gives them the opportunity to get back on the world stage.