Mathematical Model for Estimating Isothermal Oil Compressibility

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Sylvester Okotie


The evaluation of petroleum reservoir performance needs a precise
understanding of the volumetric behavior of hydrocarbon mixtures, both
liquid and gaseous. Prior to evaluating reservoir performance, all transient
fluid flow problems require the coefficient of isothermal oil compressibility,
which is often determined by reservoir fluid analysis. Sampling and analysis
of reservoir fluids is frequently an expensive and time-consuming process that
cannot be performed whenever the volumetric attributes of reservoir fluids
are required. As a result, engineers rely on correlations designed for the
purpose of calculating fluid properties, such as the coefficient of isothermal
oil compressibility. A new mathematical model for determining the coefficient
of isothermal oil compressibility was established in this study using the Soave
Redlich Kwong equation of state (EOS). Four case studies were utilized to
demonstrate that the new coefficient of isothermal oil compressibility closely
matches experimental values and has the lowest average absolute relative
error. Therefore, the new mathematical model can be used for quick
prediction of

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