The world’s growing appetite for U.S. liquefied natural gas (LNG) continued to take center stage during earnings calls at two more of the nation’s top exploration and production companies, with management at both acknowledging the opportunities and challenges that come with meeting rising demand.

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Southwestern Energy Co. said Friday it’s already sending a third of its production, or about 1.5 Bcf/d, to LNG export terminals. The company became the nation’s second largest natural gas producer last year after it entered the Haynesville Shale by acquiring Indigo Natural Resources LLC and GEP Haynesville. 

“We’re having conversations with current and future key LNG players and continuously looking at value-enhancing opportunities on a risk-adjusted basis…to enter into...