A Mechanism Model for Multiphase Flow in Gas Wells Using Foam
Dewatering Technology

doi:10.11885/j.issn.1674-5086.2012.08.30.05

Abstract

Abstract:

Based on the basic physics principle，this paper presents a mechanism model for multiphase flow in gas wells using
foam dewatering technology，which can be applied to various flow patterns. Firstly，based on the experiments of Mitchell and
Taitel，the model considers four distinct flow patterns（bubble，slug，homogenous foam，and mist）and formulates the transition
boundaries among them. Then individual models for four flow patterns are developed. Bubble flow and slug flow are described
by the drift flow models. Homogenous foam flow is treated as power-law fluid. Mist flow is simplified as no-slip model. The
evaluation results using pressure test data in 39 foam lift gas wells indicate that the unified model shows an average error of
-0.55%. Sensitivity study shows that foam lift gas well may experience bubble flow or slug flow while the gas-liquid ratio is
low. Appropriately supplying gas can move the flow into the homogenous foam flow，which can improve the lifting efficiency.

Key words: foam dewatering in gas wells, multiphase flow, mechanism model, flow patterns, pressure drop

Liu Tong1, Ren Guirong1, Zhong Haiquan1, Pan Guohua2, Deng Yuchuan3. A Mechanism Model for Multiphase Flow in Gas Wells Using Foam
Dewatering Technology[J]. 西南石油大学学报(自然科学版), DOI: 10.11885/j.issn.1674-5086.2012.08.30.05.

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