Stone Energy is mostly an off-shore driller with a number of rigs and operations off the shores of the U.S. However, their one on-shore drilling program is in the Marcellus Shale. They’re also starting to drill test wells in the Upper Devonian (also in the northeast, same area, different shale layer).
Stone issued their third quarter 2013 update yesterday. Here are the mentions of Stone’s operations in the Marcellus and UD: