A Bashiri - PhD Student, Iran University of Science and Technology
L Fatehnejad - Process Engineer, SAZEH Consultants Engineering & Construction
N Kasiri - Iran University of Science and Technology (IUST), Tehran, Iran

For a very long time, multi-phase flow did not appear to be a major issue in petroleum operations, since it was restricted to local applications on short length surface transfer lines. But oil and gas producers have very soon observed in their wells and flowlines that large hydraulic instabilities may occur under multi-phase flow conditions. Multi-phase production systems are quire complex but prediction of their behavior is essential for successful design and operation of production facilities. Multi-Phase models can be broken down into three distinct categories: Steady State Correlation, Steady State Mechanistic and Transient Mechanistic. Refer to field data analysis mechanistic steady state and dynamics simulation models, rather than empirical correlations, are widely used and recommended for design of multiphase production system including well, pipeline and downstream installations during flow assurance studies. An extensive validation methodology is proposed here by using real pipelines and wells data. The evaluation of these point models demonstrates that the TACITETM and OLGA2000TM models can be applied to any configuration of pipelines with acceptable accuracy.

Multiphase Flow, OLGA2000TM, Slug, Terrain Slugging, Simulation