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Control-Oriented Drift-Flux Modeling of Single and Two-Phase Flow for Drilling

Authors: Ulf Jakob F. Aarsnes , Florent Di Meglio , Steinar Evje , Ole Morten Aamo, ASME 2014 Dynamic Systems and Control Conference, October 22-24, 2014, San Antonio
We present a simplified drift-flux model for gas-liquid flow in pipes. The model is able to handle single and two-phase flow thanks to a particular choice of empirical slip law. A presented implicit numerical scheme can be used to rapidly solve the equations with good accuracy. Besides, it remains simple enough to be amenable to mathematical and control-oriented analysis. In particular, we present an analysis of the steady-states of the model that yields important considerations for drilling practitioners. This includes the identification of 4 distinct operating regimes of the system, and a discussion on the occurrence of slugging in underbalanced drilling.
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BibTeX:
@Proceedings{2017-04-01,
author = {Ulf Jakob F. Aarsnes, Florent Di Meglio, Steinar Evje, Ole Morten Aamo},
editor = {},
title = {Control-Oriented Drift-Flux Modeling of Single and Two-Phase Flow for Drilling},
booktitle = {ASME 2014 Dynamic Systems and Control Conference},
volume = {},
publisher = {American Society of Mechanical Engineers},
address = {San Antonio},
pages = {1 - 11},
year = {2014},
abstract = {We present a simplified drift-flux model for gas-liquid flow in pipes. The model is able to handle single and two-phase flow thanks to a particular choice of empirical slip law. A presented implicit numerical scheme can be used to rapidly solve the equations with good accuracy. Besides, it remains simple enough to be amenable to mathematical and control-oriented analysis. In particular, we present an analysis of the steady-states of the model that yields important considerations for drilling practitioners. This includes the identification of 4 distinct operating regimes of the system, and a discussion on the occurrence of slugging in underbalanced drilling.},
keywords = {}}