FracPaQ: A MATLAB™ toolbox for the quantification of fracture patterns
FracPaQ: A MATLAB™ toolbox for the quantification of fracture patterns
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DOI：
10.1016/j.jsg.2016.12.003
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发表时间：
2016-12
影响因子：
3.1
通讯作者：
D. Healy;R. Rizzo;D. Cornwell;N. Farrell;Hannah Watkins;N. Timms;E. Gomez‐Rivas;Michael C. Smith-Michael-C.-Sm
中科院分区：
文献类型：
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作者：
D. Healy;R. Rizzo;D. Cornwell;N. Farrell;Hannah Watkins;N. Timms;E. Gomez‐Rivas;Michael C. Smith-Michael-C.-Sm
变形岩石中的裂缝模式很少是均匀或随机的。裂缝的方向、大小和空间分布通常表现出某种顺序。具体地，在不同的裂缝属性之间可以存在关系，例如由一个方向主导的小裂缝，由另一个方向主导的较大裂缝。这些关系很重要，因为岩石的力学特性(例如强度、各向异性)和传输特性(例如流体、热)取决于这些裂缝属性和模式。本文描述了FracPaQ，一个新的开源的跨平台工具箱，用于量化裂缝模式，包括裂缝属性的分布及其空间变化。已开发的软件可以从二维数字图像中量化裂缝模式，如薄片显微照片、地质图、露头或航空照片或卫星图像。该工具箱包括一套基于以前发布的定量方法的matlab™脚本，用于分析裂缝属性：方向、长度、强度、密度和连通性。利用平行板模型对二维渗透率进行了估算。该软件提供了一种客观和一致的方法来量化裂缝模式及其在各种长度尺度、岩石类型和构造环境中的二维变化。所实现的方法本质上与尺度无关，适用的一项关键任务是分析和集成从微观到宏观尺度的定量断裂模式数据。该工具箱是在matlab™中开发的，其源代码可在giHub™和Mathworks™文件交换网站上公开获得。这些代码可以在任何安装了MatLab的计算机上运行，包括安装了Microsoft Windows的PC、安装了Mac OS X的Apple Mac，以及运行不同风格的Linux的计算机。应用程序、源代码和样本输入文件可以在开放存储库中获得，希望其他开发人员和研究人员将优化和扩展功能，以造福于更广泛的社区。
The patterns of fractures in deformed rocks are rarely uniform or random. Fracture orientations, sizes, and spatial distributions often exhibit some kind of order. In detail, relationships may exist among the different fracture attributes, e.g. small fractures dominated by one orientation, larger fractures by another. These relationships are important because the mechanical (e.g. strength, anisotropy) and transport (e.g. fluids, heat) properties of rock depend on these fracture attributes and patterns. This paper describes FracPaQ, a new open source, cross-platform toolbox to quantify fracture patterns, including distributions in fracture attributes and their spatial variation.Software has been developed to quantify fracture patterns from 2-D digital images, such as thin section micrographs, geological maps, outcrop or aerial photographs or satellite images. The toolbox comprises a suite of MATLAB™ scripts based on previously published quantitative methods for the analysis of fracture attributes: orientations, lengths, intensity, density and connectivity. An estimate of permeability in 2-D is made using a parallel plate model. The software provides an objective and consistent methodology for quantifying fracture patterns and their variations in 2-D across a wide range of length scales, rock types and tectonic settings. The implemented methods presented are inherently scale independent, and a key task where applicable is analysing and integrating quantitative fracture pattern data from micro-to macro-scales. The toolbox was developed in MATLAB™ and the source code is publicly available on GitHub™ and the Mathworks™ FileExchange. The code runs on any computer with MATLAB installed, including PCs with Microsoft Windows, Apple Macs with Mac OS X, and machines running different flavours of Linux. The application, source code and sample input files are available in open repositories in the hope that other developers and researchers will optimise and extend the functionality for the benefit of the wider community.