Paper: Gas Lift In Dual Zone Completions

This paper deals with the problems of gas lift design for a dually completed well. Gas lift flow valves are described. The limitations of small tubing and restricted annular areas are noted. Problems of flow valves design for small tubing are emphasized. Methods for gas lifting only one zone of a separate injection gas source for each zone to be lifted, as compared with common gas source for both zones, are discussed. Application of concentric and parallel type dual gas lift installations are outlined. The advantages of retrievable gas lift equipment are mentioned.