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Improved K-value correlation for UAE crude oil components at high pressures using PVT laboratory data

机译：使用PVT实验室数据改善了阿联酋原油组分在高压下的K值相关性

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In this paper, 732 high-pressure K-values obtained from PVT analysis of 17 crude oil and gas samples from a number of petroleum reservoirs in the UAE are used. Material balance techniques are used to extract the K-values of crude oil and gas components from the constant volume depletion and differential liberation tests for the oil and gas samples, respectively. These K-values are then correlated and the resulting correlation compared with published correlations. Comparisons of results show that currently published correlations give poor estimates of K-values for non-hydrocarbon and hydrocarbon components, while the proposed new correlation improved significantly the average absolute deviation for non-hydrocarbon and hydrocarbon components. The average absolute error between experimental and predicted K-values for the new correlation was 20.5% compared with 76.1% for the Whitson and Torp correlation, 84.27% for the Wilson correlation, and 105.8 for the McWilliams correlation. Additionally, the bubble point and dew point pressures are calculated for these 17 samples and compared with experimental values. The average absolute error in the saturation pressures for the new correlation was 6.08% compared with 56.34% for the Wilson correlation, 57.84% for the Whitson and Torp correlation, and 9.28% for the Peng-Robinson equation of state with default parameters.
机译：在本文中，使用了PVT分析得出的732个高压K值，这些分析是对阿联酋多个石油储层中17个原油和天然气样品的分析。物质平衡技术分别用于从石油和天然气样品的恒定体积消耗和微分解放试验中提取原油和天然气组分的K值。然后将这些K值进行关联，并将所得的关联与已发布的关联进行比较。结果比较表明，当前发表的相关性不能很好地估计非烃类和烃类组分的K值，而所提出的新相关性则显着改善了非烃类和烃类组分的平均绝对偏差。新相关性的实验K值和预测K值之间的平均绝对误差为20.5％，而Whitson和Torp相关性为76.1％，Wilson相关性为84.27％，McWilliams相关性为105.8。此外，还为这17个样品计算了起泡点和露点压力，并与实验值进行了比较。新关联的饱和压力的平均绝对误差为6.08％，而Wilson关联的平均绝对误差为56.34％，Whitson和Torp关联的平均值为57.84％，带有默认参数的Peng-Robinson状态方程的9.28％。

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