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Vertical Multiphase Flow Modeling In Wells And Risers

Recorded On: 02/22/2018

Accurate models for multiphase flows in vertical pipes are needed for the design and operation of hydrocarbon production systems. Examples of important application areas are:

•       Predicting the time-of-death of gas wells.
•       Predicting the correct flow rate in liquid-dominated production systems, especially for deep water risers.

In this presentation we show how vertical multiphase flow can be modeled using a 1D approach. Specifically, we explain what kind of assumptions are needed, and which physical mechanisms require closure laws. Furthermore, we show some recent experimental work conducted at industrial conditions, aimed at deriving more accurate models, and we provide some examples of how the certain closure laws have been deduced from this new data. Finally, we assemble the new closures into a unified model, and compare the predicted pressure drop and liquid content with measured values for a large experimental database on vertical flow. We also test the new model against measurements made in a 3600 meters deep gas well, where we are able to match the measured onset of liquid loading.

The aim of the presentation is to show that vertical multiphase flow, which is known to have some very complex features, can be modelled well with 1D methods, using relatively simple assumptions.

Dr. Neeraj Zambare

LedaFlow Product Director, Kongsberg Digital

Dr. Zambare has been working with Kongsberg for 17 years now (2001 – current). His field of experience includes flow assurance and process modeling – specifically dynamic simulation related. He led teams to deliver engineering studies, operator training simulators and real-time online modeling on various project around the globe. Dr. Zambare has a MS/PhD in chemical engineering from Drexel Univ., Philadelphia. He is currently responsible for LedaFlow business globally.

Dr. Jorn Kjolaas

Senior Scientist, SINTEF Multiphase Flow Laboratory, Tiller

Dr. Kjolaas has been at the SINTEF Multiphase Flow Laboratory for 16 years. His main fields of experience are experiments and modelling of multiphase flows. He has a PhD from NTNU under Prof. Ole Jørgen Nydal and is the Head of LedaFlow 1D hmodel development.

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02/22/2018 at 1:00 PM (EST)   |  60 minutes
02/22/2018 at 1:00 PM (EST)   |  60 minutes
0.10 CEU/1 PDH credits  |  Certificate available
0.10 CEU/1 PDH credits  |  Certificate available