This paper presents a practical workflow for evaluating standard MMP estimation methods and fluid characterization and lumping schemes for equation-of-state models with a high number of pseudo-components (typically 22). It has also been illustrated the validity of a minimum tuning procedure (mostly to saturation pressure, constant-mass expansion test at Tres, differential liberation experiment if available; adjusting only Tc, Pc), and the predictability of each of the applied approaches.

A quick estimate of MMP with the various methods available is critical when the experimental data are not measured. Given an uncertainty range to calculated MMP based on the data comparison, one might make a valuable contribution to the project where multi-contact miscibility needs to be modelled properly.

In the present study, the experimental slim tube MMP data were measured for reservoir fluids interacted with rich separator gases (17 cases), with pure CO2 (3 cases). The reference reservoir fluids were mostly collected from the Norwegian Continental Shelf.

A minimum tuning procedure for estimating MMP was validated throughout the present study. The fluid characterization workflow proposed in the present study is an efficient starting point to compare estimated MMPs. The results of MMP estimation methods, the ‘tie-line’ approach (in PVTsim software), slim tube simulation approach (both in PVTsim and Eclipse 300) and the ‘mixing cell’ approach, agree reasonably well within laboratory accuracy range. The uncertainty range observed in the present study would be acceptable for most field application cases.

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