2011
IMAACA 2011 Proceeding
Modeling Multiphase Flow Dynamics in Offshore Petroleum Production Systems
Authors: Rafael Horschutz Nemoto, Jorge Luis Baliņo
Abstract
In this study, a mathematical model is proposed to in- vestigate the dynamics of gas, oil and water flow in a pipeline-riser system. The pipeline is modeled as a lumped parameter system and considers two switchable states, one in which the gas is able to penetrate into the riser, and another in which there is a liquid accumulation front, preventing the gas from penetrating the riser. The riser model considers a distributed parameter system, in which movable nodes are used to evaluate local condi- tions along the subsystem. The method of characteristics allows the simplification of the differentiation in the hy- perbolic system of equations obtained. The resulting equations are discretized and integrated using an implicit method with a predictor-corrector scheme for the treat- ment of the nonlinearities. Simulations corresponding to severe slugging conditions are presented. As result of the simulations, pressure, volume fractions and superficial velocities for the phases along the tubes are calculated.
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