CMG, is a software company that produces reservoir simulation software for the oil and gas industry. It is based in Calgary, Alberta, Canada with branch offices in Houston, Dubai, Bogota, Rio de Janeiro, London and Kuala Lumpur. CMG offers three reservoir simulation applications. IMEX; a conventional black oil simulator used for primary, secondary and enhanced or improved oil recovery processes; GEM; an advanced Equation-of-State (EoS) compositional and unconventional simulator; and STARS; a k-value thermal and advanced processes simulator. In addition, CMG offers CMOST AI, a reservoir engineering tool that conducts automated history matching, sensitivity analysis and optimization of reservoir models.