An Empirical Correlation for Estimation of Formation Volume Factor of Gas Condensate Reservoirs at Separator Conditions

Abstract

Gas condensate reservoirs represent half of hydrocarbon sources in different geological strata, so prediction of their physical properties are of great importance on the scale of petroleum industry. These hydrocarbons are not stable even at stock tank conditions as oil shrinkage continued due to vaporization of light components, consequently estimation of oil formation volume factor at separator conditions represents a critical property for these reservoirs. Experimental PVT analysis including flash liberation at separator conditions are carried out on gas condensate samples covering a great range of PVT properties. An empirical correlation is developed to estimate oil formation volume factor (Bo) at separator pressure and temperature using statistical regression analysis. Assessment and validation of the developed correlation were carried out by statistical and graphical error analysis in comparison to published correlations.