There are two trends playing out in the world of oil and gas production. The first is the increasing emphasis that exploration and production companies are placing on offshore drilling. The second is the overflow of domestic crude supplies in the the U.S. that is resulting in an uptick in the use of marine transportation services, specifically barge transport. In this video, Fool.com contributor Aimee Duffy discusses what opportunities are available for investors looking for the best way to play these two trends.