水平井气液两相变质量流的流动规律研究

水平井井筒变质量流的流动规律是进行水平井产能预测、油井生产系统优化设计及动态分析的基础。从理论和实验两方面对水平井筒气液两相变质量流的流型判别与压降计算进行了探索性研究 ,建立了分层流、间歇流、分散泡状流和环雾流的流型判别模型以及分层流与间歇流的压降计算模型 ,并绘制了流型图。计算值与实验数据对比表明 ,分层流和间歇流模型与以空气和水为介质的实验结果具有良好的一致性 ,其压力梯度模型的计算值与实验测量值间的平均相对误差为 5 .3% ,大部分误差在 10 %以内 ,说明该计算模型有较高的精度

Laws of gas-liquid two-phase variable mass flow in horizontal wellbore

The law of the variable mass flow in the horizontal wellbore is useful for the horizontal well output prediction, and optimal design and dynamic analysis on oil well production system. The flow pattern discrimination and the pressure drop calculation of the gas liquid two phase variable mass flow in horizontal wellbore were studied theoretically and experimentally. The models for discriminating the patterns of the stratified flow, intermittent flow, dispersed bubble flow and the annular mist flow, as well as the model for calculating the pressure drop both in the stratified flow and in the intermittent flow were established. The flow pattern maps were made. The calculation results of stratified flow and the intermittent flow agreed with the experimental results, when taking air and water as the flow media. The average error between the calculation result of pressure gradient model and the experimental data is 5.3 percent, and most of them are below 10 percent. These results proved that the results of the calculation model are good.