6.1 Introduction6.2 Calculating Oil in Place and Oil Recoveries Using Geological, Geophysical, and Fluid Property Data6.3 Material Balance in Undersaturated Reservoirs6.4 Kelly-Snyder Field, Canyon Reef Reservoir6.5 The Gloyd-Mitchell Zone of the Rodessa Field6.6 Calculations, Including Formation and Water CompressibilitiesProblemsReferences