一种多组分相平衡计算的优化方法  

AN OPTIMAL METHOD FOR FLASH CALCULATIONS OF MULTL COMPOSITIONS

作　　者：叶继根[1] 齐与峰[1] 郭尚平[1] 方义生[1] 

机构地区：[1]中国石油天然气总公司石油勘探开发科学研究院

出　　处：《石油勘探与开发》1996年第2期84-87,共4页Petroleum Exploration and Development

摘　　要：本文提出了一种计算多组分相平衡的优化模型及具体实现方法。实例计算表明：在任一温度、压力和组成条件下，无论多组分系统是汽液共存还是仅为单相，该算法均能快速得到相应极值解。以汽液两相区中某一温度、压力和组成条件下的闪蒸计算结果为初始猜测，直接用此方法作泡露点闪蒸计算或相邻点的汽液相平衡闪蒸计算，其速度非常快，具有明显的优点。A new optimal method for flash calculations based on an equation of state is presented. Computation experience shows that this method can judge quickly whether the multi-composition system at a given pressure and temperature is in tow-phase or single-phase condition. It also shows an obvious advantage in bubble/dew point pressure/temperature calculations and in vapor-liquid flash calculations of the near conditions by directly using a known vapor-liquid flash calculation at a given pressure and temperature in two phase region.

关 键 词：汽液平衡 油气藏 多组分相 相平衡 凝析油气藏 

分 类 号：TE372[石油与天然气工程—油气田开发工程]