DR. GRANT ROBERTSON is a petroleum engineering consultant in Houston, Texas. He has worked in the oil and gas industry since 1974 for Chevron, British Petroleum, Ryder Scott and Anadarko in California, Saudi Arabia and Texas. He has held various high-level technical and management positions. His work has been very diversified covering oil and gas reservoirs, onshore and offshore properties, primary, secondary and tertiary operations, and reservoir exploration and development projects. His responsibilities have been in reservoir engineering and reservoir simulation, but he has also done production engineering and exploratory well testing. He has significant experience in preparing and conducting schools and workshops and has been an SPE Short Course instructor since 2000. He has published technical papers in refereed journals and has written many internal publications. He has been an active member of SPE since 1975 and has held numerous positions within different SPE organizations. He received a B.S. degree in Engineering Science and a M.S. degree in Chemical Engineering from the University of Toronto. He also received a Ph.D. degree in Chemical Engineering from the California Institute of Technology.