EOS calculations are a time consuming part of reservoir simulation. For some time, various authors have presented encouraging speed improvements based on different versions of the reduced method. The fundamental idea is to lower the computational cost by reducing the number of independent variables. This paper presents a careful comparison of conventional and reduced EOS algorithms, applying identical solution strategies and the same level of optimization. The results show smaller performance gains than in previously published material. The main reason for the less optimistic speed-up numbers seems to be that more performant conventional EOS algorithms are used as a reference.

You can access this article if you purchase or spend a download.