The invention provides a sand-carrying
process design method for a jet pump containing gas, liquid and
solid phases in an
oil well, and relates to the field of oil extraction processes. The fluid production capacity is designed based on a critical sand-carrying fluid flow velocity calculation formula fitted by a
solid-liquid two-phase flow experiment, a corresponding flow pressure calculation model is established by considering the gas-liquid-
solid three-phase complex flow working condition of an
oil well shaft, and then the pressure drop from the well bottom of a specific shaft position to the suction inlet of the jet pump and the suction pressure of the jet pump are iteratively calculated; the minimum
cavitation area is obtained according to the calculation result, the jet pump is optimized to guarantee safe and efficient operation of the process, meanwhile, the jet pump outlet pressure is obtained through calculation with the same iteration method, the power
liquid pressure is calculated through iteration according to the jet pump suction pressure and the jet pump outlet pressure, and the power liquid flow and the ground
pump pressure of the jet pump process are designed. According to the method, the condition that the shaft is in a gas-liquid-solid three-
phase state is fully considered, and an important theoretical support is provided for the sand-carrying
process design of the jet pump in the multiphase flow.