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Generalized Cubic Equation of StateNormal access

Author: I. Aavatsmark
Event name: Fourth EAGE CO2 Geological Storage Workshop
Session: Session I-A - Demonstrating Capacity and Containment
Publication date: 22 April 2014
DOI: 10.3997/2214-4609.20140073
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 415.61Kb )
Price: € 20

A generalized cubic equation of state is given. The Peng-Robinson and the Soave-Redlich-Kwong equations are special cases of this equation. The generalized equation of state is precisely as simple and computationally efficient as these classical equations. Through comparison with the Span-Wagner equation for CO2, we obtain an improved density accuracy in predefined temperature-pressure domains. The results of two test cases are shown, one case in the supercritical domain and one case which contains the critical point. When compared with the Peng-Robinson equation, the root mean square density deviation is reduced by a factor 2 for the domain containing the critical point, and a factor 7 for the supercritical domain.

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