摘要
Cullender和Smith模型是计算气井井底压力的首选方法。从气体稳定流动能量方程出发,运用两相流知识,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,给出了各参数的实用公式,将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。经计算实例对比,新模型效果良好,计算精度可以满足测试要求。
The Cullenrier-Smith model is firstly taken for computing gas well bottom hole pressure.From the energy equation of gas steady flow,the computing methods of such parameters involved in the derivation of model as the density,mass flow rate,volumetric flow velocity and friction resistance coefficient of the fluids in a gas-water well are discussed in detail by use of two-phase flow theory,the applied formulae of calculating these parameters are put forward.Then a corrected Cullender-Smith model suitable for computing the wellbore pressure in a gas well with high gas-water ratio may be obtained through substituting these formulae mentioned above into the energy equation of gas steady flow.Through contrasting the actual results,the effect of the new model is perfect whose accuracy can reach the need of testing acquirement.
出处
《油气井测试》
2007年第4期4-5,7,共3页
Well Testing
关键词
气井
气水比
流动压力
数学模型
gas well,gas-water ratio,flowing pressure,mathematical model
