Flow modelling challenges in fractured reservoirs have led to the development of many simulation methods. It is often unclear which method should be employed. High-resolution discrete fracture and matrix (DFM) studies on small-scale representative models allow us to identify dominant physical processes influencing flow. We propose a workflow that utilizes DFM studies to characterize subsurface flow dynamics. The improved understanding facilitates the selection of an appropriate method for large-scale simulations. Validation of the workflow was performed via application on a gas reservoir represented using an embedded discrete fracture model, followed by the comparison of results obtained from hybrid and dual-porosity representations against fully explicit simulations. The comparisons ascertain that the high-resolution small-scale DFM studies lead to a more accurate upscaled model for full field simulations. Additionally, we find that hybrid implicit–explicit representations of fractures generally outperform pure continuum-based models.

中文翻译：

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使用小规模完全显式模型的天然裂缝性油藏的流体流动表征框架

裂缝性油藏中的流动建模挑战导致了许多模拟方法的发展。通常不清楚应该采用哪种方法。对小规模代表性模型的高分辨率离散裂缝和基质 (DFM) 研究使我们能够识别影响流动的主要物理过程。我们提出了一种利用 DFM 研究来表征地下流动动力学的工作流程。改进的理解有助于为大规模模拟选择合适的方法。工作流程的验证是通过在使用嵌入式离散裂缝模型表示的气藏上的应用来执行的，然后将从混合和双孔隙度表示获得的结果与完全显式模拟进行比较。比较确定高分辨率小规模 DFM 研究为全场模拟提供了更准确的放大模型。此外，我们发现裂缝的混合隐式-显式表示通常优于纯连续模型。