APPLICATlON OF GENERALIZED PRESSURE PERTURBATION PRINCIPLE TO CUBIC EQUATION OF STATE FORMULATION

ABSTRACT

Cubic equations of state are commonly used for predicting the properties of reservoir fluids.' They are simple to use and require few parameters during computations. They have also been found to produce results that are comparable to the more rigorous multi-parameter equations. However, they are still regarded by many as mere comprehensive correlations of fluid properties because of a number of weaknesses and /imitations. This work addresses two weaknesses of cubic equations of state commonly highlighted in literature, viz: that they do not seem to have deep theoretical foundations and are not as accurate as non-cubic equations.