评价铅直气液两相管流的压差计算方法

A STATISTICAL EVALUATION OF THE METHODS USED TO PREDICT PRESSURE DROPS FOR GASLIQUID TWO-PHASE FLOW IN A VERTICAL PIPE

本义研究了大庆油田500井次的自喷油井实测生产资料,检验和评价了丹斯-若斯等八种铅直气液两相管流的压差计算方法。结果表明,在不同含水率和不同生产油气比的情况下,以奥齐思泽斯基的方法最佳。但是在不同的低、中、高含水率及低、中生产油气比下,又各有其最佳的计算方法。例如在低含水率和低生产油气比的情况下,最好采用阻力系数法;在低含水率和中生产油气比的情况下,丹斯-若斯方法最佳;在中含水率和低生产油气比的情况下,阻力系数法最佳;在中含水率和中生产油气比的情况下,流动型态法最佳;在高含水率和低生产油气比的情况下,阿济兹-戈威尔-福格拉锡方法最佳;在高含水率和中生产油气比的情况下,奥齐思泽斯基方法最佳,以上结果可供设计工作者参考。

A large number of correlations has been published in the literature for predicting gas-liquid two-phase flow pressure drops. It is important for a designer to select the optimal correlation for different conditions. On the basis of data from 500 flowing wells in Daqing Oil Field, this paper presents the results of testing and evaluation of 8 correlations usually used to predict pressure drops for two-phase flow in a vertical pipe. The results show that,in general the Orkiszewski correlation is the best.However, under any specific combination of water cut and producing gasoil ratio there exists its specific optimal correlation. For example, the resistance coefficient method is optimal for low water cut and low producing gas oil ratio, the Duns-Rose orrelation for low water cut and middle producing gas oil ratio, the resistance coefficitnt method for middle water cut and low producing gas oil ratio, the flow pattern method for middle water cut and middle producing gas oil ratio,the Aziz et al. correlation for high water cut and low producing gas oil ratio and the Orkiszewski correlation for high water cut and the middle producing gas oil ratio.The above results are re- commended for designers.