A 50-Year Retrospective on Mechanistic Multiphase Flow Modelling

As we approach the half-century milestone of utilizing mechanistic flow models in the design and operation of multiphase production systems, it becomes evident that these models have undergone significant evolution, paralleling the advancements in the simulators that employ them. Presently, state-of-the-art models continue to undergo refinement and adaptation to address emerging challenges. This paper examines these models and validates their performance against field data to identify areas of robust confidence and lingering uncertainties. Moreover, we highlight key areas of ongoing research aimed at further enhancing modelling capabilities to meet the demands of the next generation of challenges on the horizon.