Wellhead pressure, temperature and oil flow from the separator are represented. An almost periodic regime appears while oil production is intermittent. Scales are omitted for confidentiality reasons (courtesy of TOTAL) Schematic of the well. Zones of consideration (well head zone, bottom hole zone) appear in gray, p.28 ,

Observer design for multiphase flow in vertical pipes with gas-lift??????theory and experiments, Journal of Process Control, vol.15, issue.3, pp.247-257, 2005. ,

DOI : 10.1016/j.jprocont.2004.07.002

Continuous Gas-Lift Instability: Diagnosis, Criteria, and Solutions, SPE Annual Technical Conference and Exhibition, 1993. ,

DOI : 10.2118/26554-MS

Criteria for Gas-Lift Stability, Journal of Petroleum Technology, vol.40, issue.11, pp.1452-1456, 1988. ,

DOI : 10.2118/16468-PA

Stabilization of Naturally Flowing Oil Wells Using Feedback Control, SPE California Regional Meeting, 1986. ,

DOI : 10.2118/15096-MS

Theoretical stability analysis of flowing oil wells and gas-lift wells, SPE Production Engineering, pp.508-514, 1988. ,

Root Locus Stability Analysis of a Flowing Oilwell Feedback Controller, SPE Production Operations Symposium, 1988. ,

DOI : 10.2118/18874-MS

The qualitative theory of ordinary differential equations. An introduction, 1989. ,

Gas lift theory and practice, Petroleum publishing CO, 1973. ,

Well production. Practical handbook, Editions TECH- NIP, 2000. ,

A mathematical introduction to fluid mechanics, 1990. ,

An introduction to infinitedimensional linear systems theory, ser, Text in Applied Mathematics, 1995. ,

Active feedback of unstable wells at the Brage field, SPE Annual technical Confererence and Exhibition, no. SPE 77650, 2002. ,

Real-time artificial lift optimisation, Proc. of the 8th Abu Dhabi International Petroleum Exhibition and Conference, 1998. ,

Dynamique et contrôle des écoulements polyphasiques, 2005. ,

STABILIZATION OF GAS LIFTED WELLS, Proc. of the 15th IFAC World Congress, 2002. ,

DOI : 10.3182/20020721-6-ES-1901.01491

Stabilization of gas-lifted wells based on state estimation, International Symposium on Advanced Control of Chemical Processes, 2004. ,

A Solution to Instability Problems in Continuous Gas-Lift Wells Offshore Lake Maracaibo, Latin American and Caribbean Petroleum Engineering Conference, p.53959, 1999. ,

DOI : 10.2118/53959-MS

Introduction to functional differential equations, 1993. ,

DOI : 10.1007/978-1-4612-4342-7

Stability of limit cycles in hybrid systems, Proceedings of the 34th Annual Hawaii International Conference on System Sciences, 2001. ,

DOI : 10.1109/HICSS.2001.926280

Gas-lift instability resulted production loss and its remedy by feedback control: dynamical simulation results, SPE International Improved Oil Recovery Conference in Asia Pacific , no. SPE 84917, 2003. ,

Topics in nonlinear control -ouput feedback stabilization and control of positive systems, 2002. ,

State feedback control of a class of positive systems: application to gas lift stabilization, Proc. of the 7th European Control Conf, 2003. ,

Automatic Control of Unstable Gas Lifted Wells, SPE Annual Technical Conference and Exhibition, 1999. ,

DOI : 10.2118/56832-MS

Tool of the 90's to optimize gaslift efficiency in the Gonelle field, Gabon, SPE Annual technical 126 BIBLIOGRAPHY Confererence and Exhibition., no. SPE number, p.23089, 1991. ,

Standard handbook of petroleum and natural gas engineering, 2005. ,

A specific linear system with delays, Private Communication, 2005. ,

Ordinary differential equations, 1982. ,

DOI : 10.1017/CBO9781139108188.011

Hybrid limit cycles and hybrid Poincaré-Bendixon, Proc. of the 15th IFAC World Congress, 2002. ,

Paramétrage de l'algorithme de contrôle fcw pour la conduite des puits activés en gas-lift, École des Mines, 2000. ,

ACTIVE CONTROL STRATEGY FOR DENSITY-WAVE IN GAS-LIFTED WELLS, Proc. of the International Symposium on Advanced Control of Chemical Processes, 2006. ,

DOI : 10.3182/20060402-4-BR-2902.01075

CASING-HEADING PHENOMENON IN GAS-LIFTED WELL AS A LIMIT CYCLE OF A 2D MODEL WITH SWITCHES, Proc. of the 16th IFAC World Congress, 2005. ,

DOI : 10.3182/20050703-6-CZ-1902.01662

Predicting instabilities in gas-lifted wells simulation, 2006 American Control Conference ,

DOI : 10.1109/ACC.2006.1657604

Retarded dynamical systems: stability and characteristic functions, ser, Pitman Research Notes in Math. Series. UK: Longman Scientific, 1989. ,

Gas lift manual. PennWell Corporation, 2005. ,

New Gas Lift Valve Design Stabilizes Injection Rates: Case Studies, SPE Annual Technical Conference and Exhibition, 1996. ,

DOI : 10.2118/36597-MS

Casing Heading in Flowing Oil Wells, SPE Production Operations Symposium, no. SPE 13801, 1987. ,

DOI : 10.2118/13801-PA

Criteria for operation stability of gas lift, SPE paper, 1989. ,

Optimization of smart well control, Proceedings of the SPE International Thermal Operations and Heavy Oil Symposium and International Horizontal Well Technology Conference, no. SPE number 79031, 2002. ,