Dynamic Simulation of Gas Well Overflow Based on
Drift-flux Two-phase Flow Model

doi:10. 3863/j. issn. 1674 – 5086. 2013. 05. 016

Abstract

Abstract:

The current engineering calculation models for well overflow are simple and cannot accurately describe the dynamic
behavior，and the relevant parameters are not agreement with the actual situation. Thus，the parameters will make it difficult
to kill well. Based on drift-flux two-phase flow model and the interaction of gas and liquid，the model has been established by
two-fluid models to describe dynamic behavior of gas and liquid. The changes in the gas fraction of gas-liquid two-phase flow
in annulus are analyzed. The length and position of gassy segment in annulus are analyzed when killing well. A Simulation of
kill well is done using field data via which to validate the model. The simulation results show that the measured data and the
model results are consistent. The model can describe accurately the dynamic of well overflow，which provides the theoretical
foundation for the safe and effective well control.

Key words: overflow, draft model, two-phase flow, two-fluid model, well control

Wang Xudong1, Chen Ping1, Hu Deyun2, Chen Yiyang3. Dynamic Simulation of Gas Well Overflow Based on
Drift-flux Two-phase Flow Model[J]. 西南石油大学学报(自然科学版), DOI: 10. 3863/j. issn. 1674 – 5086. 2013. 05. 016.

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