西南石油大学学报(自然科学版) ›› 2009, Vol. 31 ›› Issue (3): 118-120.DOI: 10.3863/j.issn.1674-5086.2009.03.027

• 石油与天然气工程 • 上一篇    下一篇

基于SRK状态方程的烃类液相密度计算校正

梁平1 王治红2 李志铭3 唐柯4 陈科5   

  1. 1.重庆科技学院石油天然气工程学院,重庆 401331; 2.西南石油大学化学化工学院,四川 成都 610500;3.中国石油塔里木油田开发事业部,新疆 库尔勒 841000; 4.中国航油重庆公司,重庆 401120;5.四川科宏石油天然气工程有限公司,四川 遂宁 629000
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2009-06-20 发布日期:2009-06-20

THE CORRECTION OF CALCULATION IN FORECASTING THE HYDROCARBON LIQUID PHASE DENSITY BASED ON SRK STATE EQUATION

LIANG Ping1 WANG Zhi-hong2 LI Zhi-ming3 TANG Ke4 CHEN Ke5   

  1. 1.College of Petroleum Engineering,Chongqing University of Science and Technology,Chongqing 401331,China;2.School of Chemistry and Chemical Engineering,Southwest Petroleum University,Chengdu Sichuan 610500,China;3.Tarim Oilfield Company,PetroChina,Korla Xinjiang 841000,China;4.Center Aviation Gasoline Chongqing Company,Chongqing 401120,China;5.Sichuan Kehong Oil & Gas Engineering Co.,Ltd.,Suining Sichuan 629000,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-06-20 Published:2009-06-20

摘要:

针对SRK状态方程在烃类体系相平衡中计算饱和液体体积时误差较大,易导致对饱和液体的密度预测欠准确的问题。在SRK状态方程的基础上,提出了计算饱和液体体积的体积平移法,并采用Rackett方程中相关参数实现参数间的关联,从而更精确地实现饱和液相密度的计算。计算结果与实测数据对比表明,采用体积平移法后计算出的液相密度与实际密度的误差远小于未校正计算值的误差,提高了SRK状态方程的应用范围。

关键词: SRK状态方程, 预测, 液相密度, 体积平移法, 数值求解

Abstract:

The Soave-Redlich-Kwong (SRK) state equation is widely used in hydrocarbon system to calculate the other thermodynamic properties in thermodynamic equilibrium state,but the error is big in calculating the saturated liquid volume,resulting in forecasting less accurately the density of the saturated liquid.In this paper,on the basis of SRK equation of state,the authors put forward volume translation method,and apply Rackett equation parameters to achieve the linkages between relevant parameters,thereby more accurate calculation results of the density of saturated liquid are obtained.The results,contrasting with the measured data,show that the calculation results of saturated liquid density by using volume translation method are more accurate than those by using the SRK equation of state,and the scope of the application of SRK equation of state is improved.

Key words: SRK state equation, forecast, fluid density, volume translation method, numerical solution

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