There are two important flow model associated with the horizontal and deviated wells, i.e, stratified flow and dispersed flow. Since the two types of flow pattern often exchange with each other under certain conditions, it is of great significance to improve the oil migration efficiency by studying the oil-water two-phase flow. In specific, the initial change is due to the interface waves breakage that produces droplets, which contain oil droplets in the oil phase and water droplets in the water phase. In this paper, by analyzing the force situation before and after the breakage of two-phase interface wave in inclined pipeline, the prediction formula of combined force on the flow direction of interface wave is theoretically derived, and the relationship among combined force, wave amplitude, and wavelength is obtained by calculating the equation. The following conclusions are drawn:

  • 1)  The deformation and breakage are influenced by the balance between drag force, interfacial tension, gravity, and buoyancy.
  • 2)  The deformation and breakage are more likely to occur as the inclination angle of the well increases.
  • 3)  The phenomenon of liquid droplet formation occurs on the long wave; the interface wave becomes unstable and damaged with the wave amplitude increases.

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