Abstract

Summary Flow instability (i.e., heading) in gas lift wells is examined in this paper. A review of previous work done in this area is also given. A model of a gas lift well was developed and validated using field data obtained in tests of a gas lift well in the Maloob field. On the basis of the model developed and the existing stability criteria, theoretical gas lift stability maps were developed and compared with the field data. The effect of the injected-gas flow rate, the injection-port size, and the tubing diameter on the flow stability was studied using the stability maps obtained in this work. It is shown how the proposed maps can be used as a simple and efficient method for predicting the stability threshold in designing gas lift systems.

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