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首页> 外文期刊>Journal of natural gas science and engineering >Anisotropic grid generation for dynamic simulation in heterogeneous hydrocarbon reservoirs
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Anisotropic grid generation for dynamic simulation in heterogeneous hydrocarbon reservoirs

机译：非均质油气藏动态模拟的各向异性网格生成

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摘要

Coarsening from fine geological model to coarse dynamic model is one of the main practical stages in reservoir simulation process in order to minimize simulation run time. In order to preserve accuracy and minimize simulation run time simultaneously, non-uniform element distribution is required to capture dynamic interest and high-flow regions in heterogeneous porous media. In this paper, an automatic coarsening method has been developed to generate anisotropic unstructured mesh with high aspect ratio elements to minimize total number of elements in dynamic model. A high resolution indicator which is called Metric Indicator is generated based on permeability and well effect parameters. Metric Indicator guides the mesh generator to create elements with the desired size, shape and orientation. Single phase gas flow and two-phase gas-water flow equations in a heterogeneous porous media have been solved using Control Volume Finite Approximation (CVFA) method. The comparison between the simulation results of the proposed method in this study and fine-grid model as a reference model demonstrates that the presented method can obtain high accuracy results with the minimum number of elements and the minimum simulation run time. (C) 2015 Elsevier B.V. All rights reserved.
机译：为了使模拟运行时间最小化，从精细地质模型到粗动力模型的粗化是油藏模拟过程中的主要实践阶段之一。为了保持精度并同时最小化仿真运行时间，需要非均匀的元素分布来捕获异质多孔介质中的动态区域和高流量区域。在本文中，已经开发了一种自动粗化方法来生成具有高纵横比元素的各向异性非结构化网格，以最大程度地减少动态模型中的元素总数。基于渗透率和良好效果参数生成称为“指标指标”的高分辨率指标。公制指示器指导网格生成器创建具有所需大小，形状和方向的元素。使用控制体积有限逼近（CVFA）方法已经解决了非均质多孔介质中的单相气体流和两相气体水流方程。本研究方法的仿真结果与作为参考模型的细网格模型之间的比较表明，该方法可以以最少的元素数量和最少的仿真运行时间获得高精度的结果。 （C）2015 Elsevier B.V.保留所有权利。

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