The secondary fracture spacing/aperture has a great influence on flow behavior of multifractured horizontal wells. In this paper, the effects of secondary fracture spacing/aperture distribution on porosity/permeability of the stimulated reservoir volume are described. A new fractal composite flow model was proposed, which can comprehensively characterize the secondary fracture spacing/aperture heterogeneity in the stimulated reservoir volume. Results showed that the larger the fractal dimension of the secondary fracture aperture is, the greater the dimensionless flow rate will be. The smaller the fractal dimension of the secondary fracture spacing is, the smaller the dimensionless flow rate will be. The secondary fracture spacing distribution had a greater influence on flow behavior than the secondary fracture aperture distribution. If the heterogeneity of the secondary fracture spacing or aperture is not considered, the bottomhole pressure and production curve will change greatly. At last, the proposed model was applied to match the production data of two actual fields.

中文翻译：

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复杂裂缝分布的非常规油气藏流动行为半解析模型

二次裂缝间距/孔径对多裂缝水平井的流动行为影响很大。在本文中，描述了次生裂缝间距/孔径分布对增产储层体积孔隙度/渗透率的影响。提出了一种新的分形复合流动模型，该模型可以综合表征改造储层体积中的次生裂缝间距/孔径非均质性。结果表明，二次裂缝孔径的分形维数越大，无量纲流量越大。二次裂缝间距的分形维数越小，无量纲流量越小。次要裂缝间距分布对流动行为的影响大于次要裂缝孔径分布。如果不考虑二次裂缝间距或孔径的非均质性，井底压力和产量曲线将发生较大变化。最后，将所提出的模型应用于两个实际油田的生产数据的匹配。