复杂地形条件下气液两相混输工艺水力模型建立  

Development of hydrodynamic model for gas-liquid two-phase flow for complex pipeline profiles

作　　者：宋立群[1] 李玉星[1] 

机构地区：[1]中国石油大学(华东)储运建筑工程学院,山东青岛266555

出　　处：《化工学报》2011年第12期3361-3366,共6页CIESC Journal

基　　金：新世纪人才支持计划项目(NCET-07-0847);国家自然科学基金项目(51074175)~~

摘　　要：随着普光气田的开发,关于复杂地形条件下的气液混输工艺计算模型,特别是湿气集输工艺计算模型成为研究的关键问题。针对低含液复杂地形条件,建立了水力计算模型,提出了气液界面的凹面湿壁分数、剪切应力以及摩擦因子计算闭合关系式。开展了室内实验,验证了压力与持液率计算模型的准确性,收集了普光气田的现场生产压力和清管积液量数据,计算的压降结果与生产数据之间的误差在±5%以内,积液量的预测结果误差在±10%以内,吻合较好,建立的模型可以用于该条件的工艺计算。With the production of the Puguang gas field, low-liquid-loading gas-oil two-phase flow present in wet gas pipelines is one of the typical occurrences of three-phase flow in the oil and gas industry. Wet gas transportation pipelines often contain water and hydrocarbon condensates, which leads to the occurrence of low-liquid-loading three-phase flow. However, small amounts of condensates can lead to a significant increase in pressure drop along a pipeline. Irrsitu liquid holdups are important for determining pigging frequency and designing receiving facilities. The development of a hydrodynamic model for the wet gas gathering pipelines has become a key problem. According to fluid hydrodynamics, a hydrodynamic model for complex terrain was developed, and the closure correlationships corresponding to the model were given, which was suitable for the calculation of the low-liquid-loading two-phase flow in pipelines. The indoor test was done to verify the pressure and liquid holdup calculations. With the experimental data, the gas-wall friction factor, gas-oil interracial friction factor and gas-liquid interface shape relationships were optimized, and a new gas-oil interracial friction factor combined relationship and gas-liquid interface shape was established. By the comparative analysis of calculation model and experimental data, the proposed flow pattern criteria and the model for liquid holdup and pressure gradient were validated. The field production results were also collected to test the calculated results of the model. The pressure results were in the relative error ±5%, the accumulated liquid results were in the relative error ±10%, which agreed fairly well with the production data. The developed model can be used for low-liquid-loading calculation.

关 键 词：湿气集输 两相流 计算模型 

分 类 号：TQ021.1[化学工程]