基于格子玻尔兹曼方法油嘴内气液两相流图版建立及应用OA

There is a significant difference between the predicted and actual production of single-phase nozzle flow of shale gas.The multi-phase nozzle flow production prediction has problems such as a large number of parameters,difficulty in obtaining parameters,and inaccurate prediction.Therefore,this paper constructs an equivalent nozzle flow model to the actual situation,introduces the lattice Boltzmann method(LBM)to simulate the gas-liquid two-phase flow,and studies the dynamic flow chart of gas-liquid two-phase nozzle flow under different nozzle sizes,pressure differences between inlet and outlet,and liquid production.The research shows that the gas production is positively correlated with the pressure difference and nozzle size,and negatively correlated with the liquid production.Under the same production pressure difference and liquid production,the small nozzle is less affected by the liquid phase.The above method and chart are applied in the field,and the results show that the gas production predicted by the two-phase nozzle flow chart(3～7 mm nozzle)has a high consistency of 87.2%with the actual production data,and the prediction effect is good.The relevant research effectively improves the accuracy of production prediction and planning,and provides important technical support for the allocation and management of shale gas production.