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 • Previous Articles     Next Articles

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

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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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