Denver Oil and Gas Exploration and Development 370 17th St # 1700 EnCana - a leading North American unconventional natural gas and enhanced oil company, we focus on nine natural gas and four oil key resource plays. More than 80 percent of our production is clean-burning natural gas and we are a technical and cost leader in the recovery of oil through steam-assisted gravity drainage. EnCana - energy for people. Denver CO Oil and Gas Exploration and Development En Cana Oil and Gas USA INC www.encana.com Business Reviews En Cana Oil and Gas USA INC Testimonials