Qatar is sharpening its competitive edge in the global gas markets with the lifting of a 12-year moratorium on development at its prized offshore North Field, the world’s largest gas reservoir. Qatar has long reigned as the world’s largest exporter of liquefied natural gas, but the country is set to lose its dominant market position in the next several years as Australia, the United States, and Russia monetize their growing production of conventional gas and unconventional shale gas with new LNG export capacity....