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The Corresponding-States Correlation for the Prediction of Crude Oil Undersaturated Densities

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In this work, a corresponding-states correlation is presented for prediction of crude oil density in an undersaturated state. The correlation is the extension of corresponding-states liquid densities correlation. The modified corresponding states liquid densities method for predicting saturated liquid densities was coupled with the Tait equation to predict undersaturated densities. Correlations are proposed for the temperature-dependence of Tait equation parameters. Applying proper mixing and combining rules, we calculated the density of 26 crude-oil samples, mainly from Iranian reservoirs. The mixtures included a variety of compositions including N2, H2S, CO2, and hydrocarbons. The AAD% for the present method is 0.85%.
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Keywords: corresponding-states correlation; crude oil; density; undersaturated

Document Type: Research Article

Affiliations: 1: Department of Chemical Engineering, School of Engineering,Persian Gulf University, Bushehr, Iran 2: Department of Chemistry, School of Sciences,Persian Gulf University, Bushehr, Iran 3: Department of Chemical and Petroleum Engineering,Sharif University of Technology, Tehran, Iran

Publication date: June 17, 2011

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