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A novel flow-based geometrical upscaling method to represent three-dimensional complex sub-seismic fault zone structures into a dynamic reservoir model

机译：一种新颖的基于流的几何放大方法将三维复杂的亚地震断层带结构表示为动态储层模型

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摘要

Most hydrocarbon reservoirs contain faults, which are highly complex heterogeneous and anisotropic three-dimensional (3D) volumes of deformed rock. A major technical challenge in full-field flow simulation is to represent the effects of 3D fault zone structure within the two-dimensional (2D) fault planar surfaces using the industry standard commercial reservoir flow simulator due to its limited functionality. Therefore, a new flow-based geometrical upscaling (FBGU) method has been developed for capturing the effects of 3D fault zone structures in conventional low-resolution upscaled flow simulation models. Geometrical upscaling (GU) is the process of calculating across-fault and up-fault transmissibility arising from 3D flow paths through fault zones, and expressing these transmissibilities as implicit connections in a low-resolution upscaled flow simulation model. The high accuracy of the method is demonstrated by comparing the flow responses of high-resolution (referred as truth model in this paper) simulation models in which the 3D fault zone structure is represented explicitly in the grid geometry, with that of conventional resolution models in which it is upscaled using FBGU method. The flow results show that the newly developed FBGU method is extremely accurate and geometrically flexible.
机译：大多数碳氢化合物储层都含有断层，这些断层是高度复杂的非均质且各向异性的三维（3D）体积变形岩。全场流动模拟中的一项主要技术挑战是，由于其功能有限，因此要使用行业标准的商业油藏流动模拟器来表示二维（2D）断层平面内3D断层带结构的影响。因此，已经开发了一种新的基于流的几何放大（FBGU）方法，用于捕获常规低分辨率放大流模拟模型中3D断层带结构的影响。几何放大（GU）是计算通过断层带的3D流路径所产生的跨断层和上断层可传递性，并将这些可传递性表示为低分辨率放大流动模拟模型中的隐式连接的过程。通过比较高分辨率（在本文中称为真值模型）仿真模型（在网格几何中明确表示3D断层带结构）的流响应与常规解析模型中的流响应，证明了该方法的高精度。使用FBGU方法将其放大。流动结果表明，新开发的FBGU方法非常精确且几何上灵活。

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