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Modelling and Simulation in Engineering
Volume 2012, Article ID 516807, 16 pages
Review Article

A Survey of Methods for Gas-Lift Optimization

Uncertainty, Risk & Optimization, Schlumberger-Doll Research, Cambridge, MA 02139, USA

Received 5 April 2012; Accepted 7 June 2012

Academic Editor: Azah Mohamed

Copyright © 2012 Kashif Rashid et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This paper presents a survey of methods and techniques developed for the solution of the continuous gas-lift optimization problem over the last two decades. These range from isolated single-well analysis all the way to real-time multivariate optimization schemes encompassing all wells in a field. While some methods are clearly limited due to their neglect of treating the effects of inter-dependent wells with common flow lines, other methods are limited due to the efficacy and quality of the solution obtained when dealing with large-scale networks comprising hundreds of difficult to produce wells. The aim of this paper is to provide an insight into the approaches developed and to highlight the challenges that remain.