井筒与油藏耦合条件下的水平井非稳态产能预测(Ⅱ)——计算模型

在段永刚、陈伟等提出的井筒与油藏耦合作用下的水平井产能预测数学模型的基础上,借鉴Cinco H等人求解有限导流垂直裂缝压裂井压力动态的计算方法,建立产能预测计算模型,同时,考虑到工程应用计算的方便性与实用性,进一步建立Laplace空间中的计算模型,从而能够在油藏模型中利用大量现存的水平井渗流数学模型及其压力解,通过迭代求解可以获得定产量条件下的井筒流入流率分布、井筒压降分布等重要信息。

TRANSIENT PERFORMANCE PREDICTION OF HORI-ZONTAL WELL WITH COUPLED IN WELLBORE AND RESERVOIR PART2: COMPUTABLE MODEL

Based on coupling wellbore and reservoir, the forecasting-productivity model of the horizontal wells were presented by Duan Yong-gang and Chen Wei, and that Cinco’s method to calculate transient pressure of finite conductivity vertical frac-tures well, this paper found a predicting productivity calculationmodel and formulas in Laplace space, for the convenient and the practicality to apply in oil field.Therefore, it could apply a great deal of existent flow models of the horizontal wells and it’s pressure solution in the reservoir models. By iterative solution,some important information would be obtained such as the flow flux and pressure drop in wellbore etc.