Productivity Calculation and Analysis of Herringbone Branch Well with Oil-water Two-phase Flow

摘要

Through introducing the pressure function and apparent viscosity the expression of space potential is obtained based on the oil-water two-phase flow theory in this paper. The potential distribution in reservoir of herringbone branch well under the condition of oil-water two-phase steady flow has been studied based on the potential theory. Then the coupled model of flow in reservoir and wellbore pipe-flow is deduced according to wellbore pressure drop calculation model of the variable mass flow with the oil-water two phase in the horizontal pipe. And the anisotropic correction parameters are introduced to correct the model. The model can be used to calculate the productivity of branch well with different configurations at different water cut stage. The establishment of this model has provided a basis for the productivity prediction and the configuration optimization of herringbone branch well under the condition of oil-water two-phase flow.