高含水气井井筒压力计算新方法探讨  

DISCUSSION ON THE NEW CALCULATION METHODS OF WELLBORE PRESSURE IN HIGH WATER-CUT GAS WELL

作　　者：田卓[1] 苟宏刚[2] 张建华[2] 卢蜀秀[2] 王军霞[2] 

机构地区：[1]西安石油大学 [2]中油长庆油田分公司

出　　处：《天然气勘探与开发》2007年第1期58-59,66,共3页Natural Gas Exploration and Development

摘　　要：从气体稳定流动能量方程出发,运用两相流知识,详细讨论了模型推导中涉及的气—水井流密度、气—水井流质量流量、气—水井流体积流速、气—水井流Moody摩阻系数的计算方法,给出了各参数采用我国法定计量单位的实用公式,最后将各参数计算公式代入气体稳定流动能量方程,得出适用于高气水比气井井筒压力计算的修正Cullender和Smith模型。文中同时给出一计算实例,对比了采用传统Cullender和Smith模型和文中提出的修正Cullender和Smith模型进行了气井井底流压和井筒流压分布计算,其结果良好。Based on steady gas flow energy equation and two-phase flow theory,the calculation methods such parameters involved in the model derivation as the density,mass flow rate,volumetric flow velocity and Moody friction resistance coefficient of the gas-water well flow are discussed;the practical formulae of each parameter tallied with the legal measure unit in China are advanced.Finally,the corrected Cullender-Smith model suitable for calculating the wellbore pressure in a gas well with high gas-water ratio may be obtained by substituting the formulae into steady gas flow energy equation.Simultaneously a calculation example is introduced in the paper.Through contrasting the results of computing the flow pressures both at bottom hole and along wellbore by the conventional and corrected Cullender-Smith models,it indicates the corrected model is reliable.

关 键 词：气井 气水比 流动压力 数学模型 

分 类 号：TE319[石油与天然气工程—油气田开发工程]