Who goes there: friend or foe?

In the series Middle East POV: transcending boundaries, Ken McKellar, Middle East Energy & Resources Leader, contributes Who goes there: friend or foe? Gas, Russia and the Middle East pointing to the difficulties the two energy powers have in forging a strong partnership despite complementary aspects of their respective gas businesses. Russia and the Middle East both supply gas to Europe and to Asia. In theory that makes them competitors. They are also both affected by Chinese demand and North American supply and giving them a common cause – in theory.  Should Russia and the Middle East be enemies or friends?