(31) A CRITICAL REVIEW OF TWO-PHASE FLOW GAS-OIL HYDRODYNAMICS FOR HORIZONTAL WELL APPLICATIONS
The theoretical studies and experimental data of two-phase flow hydrodynamics currently available are mainly for the case of horizontal, inclined, and vertical flows. There are some developments to understand the two- and three-phase flow hydrodynamics on the hilly-terrain and the severe-slugging in both onshore and offshore cases. Yet, for the cases of horizontal well with the production tubing inside, the impact of the tubing location in the horizontal well at the curve section (the connection between the vertical and horizontal sections) are not clear. This work provides the review on the two-phase flow hydrodynamic characteristics for the case of horizontal well and provide the fundamental understanding on the impact of toe-up and toe-down of the well to the case of two-phase gas-oil flows. The review also emphasizes on the applicable two-phase flow steady-state and transient models that can be using to analyze the horizontal well production successfully.