Observer Design for Multiphase Flow in Vertical Pipes with Gas-Lift — Theory and Experiments

@inproceedings{Aamo2004ObserverDF,
  title={Observer Design for Multiphase Flow in Vertical Pipes with Gas-Lift — Theory and Experiments},
  author={O. M. Aamo and G. O. Eikrem and Hardy B. Siahaan and Bjarne A. Foss},
  year={2004}
}
Unstable regimes occuring for multiphase flow in vertical risers have successfully been stabilized using conventional linear control techniques. However, these control systems rely on downhole measurements which are at best unreliable, if at all available. In this paper, we design a nonlinear observer for the states of the multiphase flow that relies on topside measurements only, and apply it to estimate downhole pressure for feedback control. A key feature of the design is that it exploits the… CONTINUE READING
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