AGA8-DC92和GERG-2008状态方程在天然气密度测算中的精确度比较  

Comparison of Accuracy of Calculating Natural Gas Density Using AGA8-DC92 and GERG-2008 EOS

作　　者：叶喆 Ye Zhe(Zhejiang Zheneng Natural Gas Operation Limited Company,Hangzhou,Zhejiang 310052,China)

机构地区：[1]浙江浙能天然气运行有限公司,浙江杭州310052

出　　处：《石油工业技术监督》2022年第1期26-31,共6页Technology Supervision in Petroleum Industry

摘　　要：通过多组分气体在等温过程不同压力下密度的实测值与AGA8-DC92和GERG-2008测算值之间的偏差,评价了两种方法在测算天然气密度时的精确度。结果表明:GERG-2008状态方程对密度的测算精度总体优于AGA8-DC92,且在低温低压下的测算精度更突出;在适用温度压力区间内,两种方法的测算精确度差异相对较小。当样品中含有较多惰性或重质组分时,两种方法的精度差别不明显。By comparing the deviations between the measured density of multicomponent gas under different pressures in the isother⁃mal process and the calculated density by using AGA8-DC92 and GERG-2008 equations,the accuracy of two methods in calculating the density of natural gas is evaluated.It is shown that the calculation accuracy using GERG-2008 equation is generally better than that using AGA8-DC92 equation,and the calculation accuracy is higher at low temperature and low pressure.In the applicable temper⁃ature and pressure range,the difference of calculation accuracy between the two methods is relatively small.When the sample contains more inert or heavy components,the accuracy difference between the two methods is not obvious.

关 键 词：AGA8-DC92 GERG-2008 天然气密度 计算精确度 

分 类 号：TE642[石油与天然气工程—油气加工工程]