摘要
天然气拟临界参数是与天然气有关计算的基础参数,含有酸性气体的天然气大多采用Kay规则和Wichert&Aziz校正计算气体拟临界参数,而基于酸气密度计算方法国内还没有见到相关文章。此次研究收集了国内外各大气田93个酸性气体气样,结合实验分析结果建立了一新的适合于酸性天然气拟临界参数计算的密度计算公式;并采用新的计算公式计算某含H2S、CO2酸性天然气和常规天然气偏差因子,并与Kay's混合规则和Wichert&Aziz校正计算模型、Standing方法、实验结果进行对比分析。研究表明,该公式对于酸性气体具有较好的代表性,计算精度高于Kay's混合规则、Standing密度计算方法;而对于低相对分子质量常规气体Standing方法计算精度最高。
The pseudo critical parameters of natural gas are the fundamental calculation parameters related gas. The pseudo critical parameters of sour gas are got by the method of Kay rule and Wichert & Aziz updating formula, while the method basing on the density of sour gas has not been published at home. This study collected 93 sour gas samples from several gas fields at home and established a new group of equations calculating the pseudo critical parameters of sour gas using the density of gas on the base of the experimental results. Respectively calculate the Z of sour gas and conventional gas with the new equations. Contrast the results from the new equations, Kay rule and Wichert & Aziz updating formula, the Standing equations and experiments. The study shows that the new equations is be suited to sour gas and the accuracy is higher than the Kay rule and Wichert & Aziz updating formula, the Standing equations; to the low molecular weight gas, the accuracy of Standing method is the highest.
出处
《石油与天然气化工》
CAS
CSCD
北大核心
2005年第4期310-314,共5页
Chemical engineering of oil & gas
基金
中石油重点实验室项目"高含硫气体相态理论研究"部分研究成果
关键词
拟临界参数
酸气
Kay's规则
密度
pseudo critical parameters, sour gas, Kay's rule, density
