This paper focuses on the influence of the crude oil characterization
on minimum miscibility pressure (MMP) calculation. It is shown what ki
nd of compounds may be lumped together in order to calculate the MMP w
ith a good accuracy. In a first step, a selected crude oil is modeled
with 37 pure compounds using the characterization procedure developed
by Avaullee et al. (1997a) in which two parameters of the distillation
residue are fitted on the experimental bubble points. In this context
, all the experimental data (PVT, swelling test, slim tube test) are c
alculated with a very good accuracy. In a second step, the heavy inter
mediate, the middle intermediate and the light compounds are successiv
ely lumped. The influence of such lumping procedure on the calculated
MMP is discussed.