摘要
通过对富气输送方式和技术特点进行分析和比较,并根据高压条件下富气输送过程中低持液率的特点,建立了水平管路/轻微起伏富气输送管道的清管模型,模型中耦合了相态模型(选用PR状态方程)、水力热力模型,并且以某气田群天然气凝析液输送管道为例,进行清管工艺模拟计算。将研究计算结果与瞬态两相流模拟软件OLGA的计算结果进行了比较,结果表明,清管模型不仅具有较好的计算精度和较快的运行速度,而且还具有跟踪清管球和模拟液塞增长等功能,适用于管道的设计计算。
For rich gas transmission scheme,extraction of NGL from natural gas is not required in oilfiled or gas condensate field,so the gas treatment process in the field is simplified and the expense for the storage and transmission of NGL is saved. Rich gas can be transported in single phase at conventional pressure,in dense phase, or in two-phase. Herein, the technique for rich gas treatment is discussed and the technical characteristics of various rich gas transmission modes are compared. And a new simple pigging model is developed for predicting pigging operation in high pressure rich gas pipelines, with low-liquid loading, which is coupled the phase behavior model (adopting PR equation of state) with the hydrodynamic-thermo-dynamic model. The comparison of the calculating results with that of the two-phase transient computational code OLGA (with a dynamic,one-dimensional,extended two-fluid model) indicates that the pigging model has better precision and higher speed in calculation, and has the capability of pig-tracking and slug-length-increasing model and is suitable for engineering design.
出处
《油气储运》
CAS
北大核心
2008年第2期18-22,共5页
Oil & Gas Storage and Transportation
关键词
管道
富气输送
清管模拟
研究
pipeline,rich gas transmission,pigging simulation
