In today's edition, energy analysts Joel South and Taylor Muckerman break down the top-performing energy companies this past year. Just making the cut on the top-10 list in 2012 is offshore driller Ensco (VAL), and two oil-focused exploration and production companies, EOG Resources (EOG -2.13%) and Gulfport Energy (GPOR). Check out the video below to see what went right for these companies in 2012.