裸眼压裂水平气井产能计算及裸眼段贡献研究

对压裂水平井的大部分传统研究认为，其产能计算问题可转化为一种“基质-裂缝-井筒”的双重介质模型，即认为地层中的流体先全部流入裂缝，再沿裂缝流入井筒。根据文献9]的研究成果，对于水平段为裸眼的压裂水平井，这一假设并不符合事实。本文以国际上使用较多的Guo＆Evans的裸眼压裂水平井产能模型“’为基础，分析了它的未全部贯穿油藏的压裂水平井拟稳态产能解，并讨论在水平井的总产量当中，水平段和裂缝各自所占的比例。

Productivity Calculation and Wellbore Section Contribution of Fractured Horizontal Openhole Gas Wells

Traditional studies on fractured horizontal wells suggest that its production calculation problem can be transformed into the dual media model of ＂matrix - fracture - wellbore＂, namely that all fluid in the formation firstly flows into fractures, and then flows along fractures to the wellbore. According to research results in the literature 91, for openhole horizontal section of the fractured horizontal wells, this assumption is not true. In this paper, based on Guo ＆ Evans productivity model1] of openhole fractured horizontal wells, pseudo-steady state productivity solution of the model for non-penetrating fractured horizontal wells through the reservoir was analyzed, and percentages of production from the openhole section and production from fractures in total production of the horizontal well were discussed.