论文部分内容阅读
Chase和Alkandari提出了一种用于预测水力压裂垂直气井产能的无因次向井流动动态(IPR) 模型, 模型与Vogel方法类似, 改进后可以用来预测水平气井的产能。给定Xe/Xf值的方程可以通过Joshi以及Russel和Truitt提供的联合方程推导出来。用系统分析模型模拟了20口井, 相应的IPR曲线与那些利用改进的无因次IPR模型所得的曲线进行了对比。利用新模型产生的IPR曲线与利用模拟器产生的IPR曲线的平均误差为11 1%。当只对绝对无阻流量进行比较时, 两者的平均误差仅为3 34%。无因次IPR曲线模型为水平气井的产能预测提供了一种更为有效的方法。
Chase and Alkandari proposed a dimensionless well flow dynamics (IPR) model for predicting hydraulic fracturing productivity in vertical gas wells. The model is similar to the Vogel method and can be used to predict horizontal well productivity. The equation for a given Xe / Xf value can be derived from the joint equation provided by Joshi and Russel and Truitt. Twenty wells were modeled using a system analysis model and the corresponding IPR curves were compared with those obtained using the improved non-dimensional IPR model. The average error of the IPR curve produced by the new model and the IPR curve generated by the simulator was 11 1%. When comparing only absolute unobstructed traffic, the average error between the two was only 344%. The dimensionless IPR curve model provides a more effective method for horizontal gas well productivity prediction.