Modeling Nonisothermal Rapid Multiphase Flow in Wells Under Nonequilibrium Conditions

摘要

An improved nonisothermal mathematical model considering the nonequilibrium effects involved during rapid multiphase flow in wells is presented. The extent of the nonequilibrium effect on deviation from the equilibrium-model predictions is delineated at various flow rates, fluid saturations, and temperatures. Applications for two-phase (oil/gas) and three-phase (oil/water/gas) systems are presented. The model presented here can be coupled with reservoir simulation for accurate representation of the well-fluid hydraulics under non-equilibrium- and nonisothermal-flow conditions.