Predicting the Distribution of Pressure, Temperature, Velocity, and Density of Three-phase Bubbly Flow in HTHP Wells

A one-dimensional, thermal, steady state mathematical model is presented, which can be used for determining the pressure, temperature, velocity and density distributions of three-phase flow. The numerical solution, which consists of mass, momentum, and energy conservation equations, is based on the four order Runge-Kutta method. Due to the sensitivity of gas holdup, an improved model is performed and makes the result more stable. The average value is adopted to meet the redundancy of model. The data of X Well, 7110 m deep, in Sichuan, China, is used for case calculations and a sensitivity analysis is made for the model.