In this paper, the capacitance water holdup and turbine flowmeter data processing method of FILT in oil–water two-phase flow are studied by the oil–water, two-phase flow experiment. Well deviation causes backflow and circulation. A small deviation of the horizontal well inclination causes significant changes in holdup and flow velocity. In horizontal well oil–water two-phase flow, the flow separation in different flow zones complicates the reading of the turbine flowmeter due to the change the cross-sectional area of the fluid. There are many influencing factors, such as gas lock, water lock, and flow instability. Due to gravity separation in horizontal wells, the distribution of fluids in horizontal cross sections is more complicated. Especially for the development of reservoirs with thin production layer, small porosity, and low permeability, it shows the incomparable effect of vertical wells. Single well production is large and the production cycle is long. In the production of oil and gas fields, horizontal wells can obtain larger reservoir drainage area.
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