Abstract

A novel phase-boundary tracking method is proposed to precisely capture the vapor-liquid/liquid-asphaltene and vapor-liquid/liquid-liquid two-phase boundaries in pressure-temperature and pressure-composition phase diagrams. The two-phase boundary determined by the proposed phase-boundary tracking method intersects the three-phase boundary at the apex of the three-phase region, which indicates the continuation of the three-phase region. The calculated two-phase boundaries also agree well with those documented in the literature.

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