天然气压缩因子计算方法的评价  

Evaluation on Method of Calculating Compressibility Factors of Natural Gas.

作　　者：韩洪升[1] 

机构地区：[1]大庆石油学院开发系

出　　处：《油气储运》1994年第1期13-18,31,共7页Oil & Gas Storage and Transportation

摘　　要：油气两相流动的计算和天然气储运、加工的工艺设计计算,都需要准确确定天然气的压缩因子。延用过去通过查司坦丁—凯茨关系图,确定天然气压缩因子的方法,已不能满足编制计算机程序的要求。通过5种常用的天然气压缩因子计算方法的计算结果与司坦丁—凯茨关系图对比,对这5种天然气压缩因子相关式进行了评价,认为:①Dranchuk-Purvis-Robinson方法和Hall-Yarborough方法的相关曲线与司坦丁—凯茨天然气压缩因子图十分吻合,在所有对比压力和对比温度下都具有较高的计算精度;②Brill-Beggs方法在T_r<2.6条件下与司坦丁—凯茨天然气压缩因子相关曲线图十分吻合,有较高的计算精度和较宽的适用范围;③在用手工计算时,推荐使用Gopal相关方法。Accurate definition of the compressibility factors of natural gas is required for both the calculation of 2-phase flow of crude oil and gas, and the calculation of process design of natural gas storage and transportation as well as processing. Yet, defining the factors only by consulting Standing-Kate's Corelation Diagram can not meet the requirements for computer programming. The comments below are obtained through comparison between Standing- Kate's Corelation Diagram and the calculated results got through the five conventional methods of calculating the compressibility factors of natural gas and through evaluation of the five relative Corelation equations; 1. The relative curve between Dranchuk-Purvis-Robinson Method and Hall-Yarborough Method tallies greatly with Standing-Kate's Corelation Diagram about the compressibility factors of natural gas, with high calculation accuracy under all kinds of Corelation pressures and temperatures; 2. Under the condition of Tr<2. 6, Brill-Begg's Method tallies well with Standing-Kate's Corelation Diagram of the compressibility factors of natural gas, again with high calculation accuracy and wide range of applicability; 3. Gopal Method is recommended for manual calculation.

关 键 词：天然气 储运 压缩因子 计算 

分 类 号：TE862[石油与天然气工程—油气储运工程]