DeGolyer and MacNaughton

DeGolyer and MacNaughton is a petroleum consulting company based in Dallas, Texas, with offices in Houston, Moscow, Astana, Buenos Aires, and Algiers.
DeGolyer and MacNaughton was founded in 1936 by Everette Lee DeGolyer and Lewis MacNaughton. In 2004, it acquired Calgary-based Outtrim Szabo Associates forming its office in Canada as a subsidiary company.
Activities.
DeGolyer and MacNaughton Corp. provides petroleum consulting services in the United States and internationally. It offers appraisals, economic forecasts, geological studies, geophysical studies, petrophysical studies, engineering analysis, reservoir simulation, reserves assessment, and management services. It serves the petroleum industry and financial community.