Three-Phase of Oil Reservoirs with Mass Fraction Formulation was created by Ir. Duarte da Costa Sarmento, Dip.Eng., S.T., M.Eng., IPM., Prof. Dr. Francisco Marcondes., André Luis de Oliveira Araújo. This book consists of several discussions, including: Black-Oil Model In Oil Reservoirs In Mass Fraction And Pressures, Physical Properties Of Reservoirs And Fluids, Mathematical Model and Transformation Of Equations And Obtaining Approximate Equations, Well Model And Conditions and Oil-Water Flow With Black Simulator.