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准确计算CO2 、H2 S密度对注气方案设计至关重要。本文介绍了三个常用的计算酸气密度的状态方程 :SRK方程、PR方程、PT方程。运用Peneloux ,Mathias体积校正法对SRK方程和PR方程计算结果进行校正 ,并提出了误差计算公式。用SRK、SRK Peneloux、PR、PR Peneloux、PR Mathias和PR方程分别计算了CO2 、H2 S及其混合物的密度 ,同时还评估了绝对误差、平均误差、绝对平均误差和最大误差。研究表明 ,除SRK方程外其它 5个方程都满足工程需要
Accurate calculation of CO2, H2S density of gas injection program design is essential. This article presents three commonly used state equations for calculating acid gas density: the SRK equation, the PR equation, and the PT equation. The calibration results of SRK equation and PR equation were corrected by Peneloux and Mathias volumetric correction methods, and the error formula was proposed. The densities of CO2, H2S and their mixtures were calculated using SRK, SRK Peneloux, PR, PR Peneloux, PR Mathias and PR equations respectively. The absolute, average, absolute and maximum errors were also evaluated. The research shows that, except for the SRK equation, the other five equations satisfy the engineering requirements