Share of Unconventional Deals Higher than in 2010; Dominated by US Shale

In 2011, share of conventional deals in the total deal value was approximately 59%. This was significantly lower than the share in 2010 (71%) and closer to the 2009 share of 51%. The $41 billion ExxonMobil-XTO deal and $15.1 billion BHP-Petrohawk deal were the largest contributors to the unconventional tally in 2009 and 2011 respectively. [...]