确定气井高速湍流系数的新相关经验公式

A New Correlation Equation for Determining High-Velocity Turbulence Coefficient of Gas Wells

在井底附近地带 ,对于高速气体的流动 ,湍流或非达西流动的产生是不可避免的。湍流不仅增加了表皮系数 ,而且降低了气井的产能。新的确定气井高速湍流系数的相关经验公式 ,较以前文献的相关经验公式 ,具有更好的代表性 。

The turbulence or non Darcy's flow are unaviliable for high velocity gas flow at near wellbore zone.The high velocity turbulence flow is not only increased skin factor,but also decreased productivity of gas wells.A new correlation equation for determining high velocity turbulence coefficient is proposed in this paper,based on the testing data of one dimension core through natural gas or air under surface conditions by references .This correlation is more representative than previous correlation by references .It may be used to determine high velocity turbulence coefficient for different reservoirs' permeability.