Saudi Aramco is poised to make its long-anticipated debut in the US gas sector with a preliminary agreement to enter Sempra’s Port Arthur LNG. The move will see Aramco follow rival Qatar Petroleum into the burgeoning US LNG export scene.

Saudi Aramco has reached an agreement with Sempra LNG that should see it take a stake in a major US LNG project. Already the world’s largest crude oil exporter (see p8), the kingdom is actively expanding its refining and petrochemicals...