Questar Exploration & Production Acquires, explores for, develops and produces natural gas and oil Questar Exploration & Production explores for, acquires, develops, and produces natural gas and oil. Questar Exploration & Production operates in two core areas: the Rocky Mountain region of Wyoming, Utah and Colorado, and the Midcontinent region of Oklahoma, Texas and Louisiana. Questar Exploration & Production has a large inventory of identified development drilling locations, primarily on the Pinedale Anticline in western Wyoming, in the Uinta Basin of eastern Utah and in northwestern Louisiana. Division offices are located in Denver, Oklahoma City and Tulsa.