克拉2气田产能预测方程的建立

克拉2气田是西气东输的主力气田，准确预测其产能是设计开发方案的基础。以克拉2气田现有产能测试资料为基础，分别确定了各次测试的拟压力和压力平方法无阻流量，根据无阻流量与地层系数的关系，建立了普遍适用于该气田主力产气层的典型二项式产能方程。用拟压力产能方程能够比较准确地预测克拉2气田单井产能和生产压差，也能预测不同打开程度下全气藏的平均产能和生产压差；压力平方法产能方程可用于粗略估计气井产能。图1表1参9

A productivity forecast equation for the Kela-2 Gas Field, Tarim Basin

The Kela-2 Gas Field is the main reserves supply for the West-East Gas Pipeline Project in China. Accurate forecast of the productivity of Kela-2 is the basis of development planning. The relationship of the open flow potential with respect to the flow capacity is utilized to establish the typical binomial productivity equation that is applicable field wide. The pseudo-pressure productivity equation can be used to reliably predict the individual well productivity and producing pressure drop, and the average field-scale productivity and pressure drop under various perforation degrees. The productivity can also be approximately estimated by using the pressure-squared method.