摘要
Abstract
Natural gas compressibility factor Z is one of the most important physical parame-ters in the natural gas engineering calculations , and the determining methods mainly include Standing-Katz chart method ,laboratory experiments method ,equations of state law method and the empirical formulas method .Due to the usage limitations of the former two methods ,the ap-plication advantages of equations of state law method and the empirical formulas method become increasingly evident .In this paper ,the calculation accuracy of equations that calculate compressi-bility factor based gas composition was evaluated .The equations include AGA8-92DC ,Piper-DAK ,Piper-Mahmoud ,Elsharkawy-DAK and Elsharkawy-Mahmoud .These five calculation for-mulas to be valuated were written into Visual Basic 6 .0 and 113 measured values of acidic lean gas compressibility factor were used to compare with the calculated values of these five formulas . The comparison indicates that firstly for the lean gas with carbon dioxide at low pressure or medi-um pressure ,the calculation error of AGA8-92DC is less than others ;secondly ,for the lean gas with hydrogen sulfide and carbon dioxide at low or medium pressure ,the calculation error of Pip-er-Mahmoud is minimal compared to the other correlations .In addition ,this study presents that w hen the temperature of natural gas increases ,the errors of calculated values by these five for-mulas will all decrease compared with the original calculation errors .关键词
压缩因子/状态方程计算法和经验公式法/Visual Basic 6.0/酸性贫气/计算误差Key words
compressibility factor/equations of state law method and the empirical formulas method/Visual Basic 6.0/acidic lean gas/calculation error分类
能源科技
