摘要
湿气集输管道在天然气开发中发挥着重要作用,如果湿气管道内存在积液,会导致能耗增加、腐蚀加剧和生成水合物等问题,但目前尚没有一个瞬态两相流模型能够准确地计算起伏湿气管道中的积液和压降规律。在已有的两相流双流体模型基础上,基于连续性方程和动量方程,建立了一种新的适用于起伏管路的瞬态两相流理论模型,并利用数值方法通过编制MATLAB程序实现对起伏湿气管道中持液率及压降等的计算。利用普光气田现场湿气集输管道的运行数据对模型进行了验证,并与多相流软件OLGA的模拟计算结果进行了对比。验证结果证明所建立的模型计算精度较高,持液率和压降的相对误差分别为±15%、±5.5%,可以应用于起伏湿气管道两相流的模拟。
Wet-gas gathering pipeline plays an important role in natural gas development. Liquid accumulation in the wet-gas pipeline will result in higher energy consumption, corrosion and more hydrates. However, the prediction of the flow behavior in the undulating wet-gas pipeline is difficult, thus no accurate model is available now. Based on the existing two-phase flow model, a transient two- phase flow model applicable for the undulating wet-gas pipeline is developed in this paper. A MATLAB code is developed and applied to simulate the flow in wet-gas pipeline. In order to testify the accura- cy of the model, the liquid holdup and pressure drop of the wet-gas gathering pipeline in Puguang Gas Field are calculated with the errors of ＋ 15% and ＋ 5.5% respectively. The results are also compared with those calculated by OLGA, which shows the model can be applied to simulate the two-phase flow in undulating wet-gas gathering pipeline.
出处
《石油工程建设》
2016年第6期1-4,10,共5页
Petroleum Engineering Construction
关键词
起伏湿气管路
瞬态两相流模型
持液率
压降
undulating wet-gas pipeline
transient two-phase flow model
liquid holdup
pressure drop
