深部凝析气井流入动态分析研究  

A study on deep condensate gas well inflow performance equation

作　　者：喻西崇[1] 赵金洲[1] 邬亚玲 曾渊奇[3] 

机构地区：[1]西南石油学院 [2]南充市炼油化工总厂 [3]西南油气田分公司重庆气矿

出　　处：《石油勘探与开发》2002年第3期71-73,共3页Petroleum Exploration and Development

基　　金：国家 8 63项目石油勘探开发分布式集成应用系统 (863 30 6 ZT0 4 0 3 3)

摘　　要：根据天然气和反凝析液在地层中渗流特点 ,结合凝析气体系相态理论及闪蒸计算方法 ,运用状态方程进行模拟 ,考虑流体相态和组分的变化以及凝析气井的表皮系数 ,引入稳态理论的两相拟压力函数 ,建立适合凝析气流入动态预测的方法 ,并根据凝析油的临界压力和临界饱和度与渗流的关系 ,给出了预测凝析气井井底流压的数学模型 :①井底压力高于露点压力时的渗流数学模型 ;②井底流压低于露点压力且凝析油饱和度小于临界饱和度时的渗流数学模型 ;③井底流压低于露点压力且凝析油饱和度大于临界饱和度时的渗流数学模型。根据这一思路编制了完整的计算软件。该方法适用于凝析气井流入动态预测。参 9(喻西崇摘 )In this paper, a new method is brought forward which is suitable for condensate gas flow state. The new method bases on the flow character of natural gas and the petro-condensate liquid in the formation, combining with phase state theory of condensate gas. At the same time, the change of the liquid phase and the components and the various skin factors under different condition are also considered. The two-phase pseudo-pressure function of the theory of stable state is used. A new equation is adopted to calculate the well bottom flow pressure. For these method and concept, the mathematics model for three different situation:First, well bottom flow pressure is higher than dew point pressure. Second, well bottom flow pressure is lower than dew point pressure but condensate oil saturation lower than flow saturation. Last, well bottom flow pressure is lower than dew point but condensate oil saturation higher than flow saturation. Developing the relevant software to compare with the result of well test, the new method is suit for the forecast of the influx state in condensate well.

关 键 词：深部凝析气井 流入动态分析 研究 相态 流入动态方程 数学模型 

分 类 号：TE372[石油与天然气工程—油气田开发工程]