Doddington Sandstone Computed Tomography Rock Scan - 4.2µm - 161213
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The images in this dataset are a sample of Doddington Sandstone from a micro-computed tomography (micro-CT) scan acquired with a voxel resolution of 4.2µm. This dataset is part of a study on the effects of Voxel Resolution in a study of flow in porous media. A brief overview of this study summarised from Shah et al 2015 follows. A fundamental understanding of flow in porous media at the pore-scale is necessary to be able to upscale average displacement processes from core to reservoir scale. The study of fluid flow in porous media at the pore-scale consists of two key procedures: Imaging reconstruction of three-dimensional (3D) pore space images; and modelling such as with single and two-phase flow simulations with Lattice-Boltzmann (LB) or Pore-Network (PN) Modelling. Here we analyse pore-scale results to predict petrophysical properties such as porosity, single phase permeability and multi-phase properties at different length scales. The fundamental issue is to understand the image resolution dependency of transport properties, in order to up-scale the flow physics from pore to core scale. In this work, we use a high resolution micro-computed tomography (micro-CT) scanner to image and reconstruct three dimensional pore-scale images of five sandstones and five complex carbonates at four different voxel resolutions (4.4µm, 6.2µm, 8.3µm and 10.2µm, scanning the same physical field of view. S.M.Shah, F. Gray, J.P. Crawshaw and E.S. Boek, 2015. Micro-Computed Tomography pore-scale study of flow in porous media: Effect of Voxel Resolution. Advances in Water Resources July 2015 doi:10.1016/j.advwatres.2015.07.012 We gratefully acknowledge permission to publish and funding from the Qatar Carbonates and Carbon Storage Research Centre (QCCSRC), provided jointly by Qatar Petroleum, Shell, and Qatar Science & Technology Park. Qatar Petroleum remain copyright owner.
本数据集内的图像为多丁顿砂岩（Doddington Sandstone）的样本，由体素分辨率为4.2μm的微计算机断层扫描（micro-computed tomography，micro-CT）设备采集得到。本数据集是一项关于体素分辨率对多孔介质流动影响的研究的组成部分。下文将简要概述由Shah等人2015年的研究提炼的该研究核心内容。 在孔隙尺度下理解多孔介质内的流动过程，是将平均驱替过程从岩心尺度升级至油藏尺度的必要前提。孔隙尺度下的多孔介质流体流动研究包含两项核心流程：一是对三维（3D）孔隙空间图像进行成像重建；二是开展模拟研究，例如采用格子玻尔兹曼（Lattice-Boltzmann，LB）法或孔隙网络（Pore-Network，PN）建模开展单相、两相流模拟。 本研究通过分析孔隙尺度的实验结果，以预测不同长度尺度下的岩石物理特性，包括孔隙度、单相渗透率以及多相流特性。本次研究的核心问题在于明确输运特性的图像分辨率依赖性，从而实现流动物理过程从孔隙尺度到岩心尺度的尺度升级。 在本工作中，研究团队使用高分辨率微计算机断层扫描设备，对5块砂岩和5块复杂碳酸盐岩样本进行成像，并以4种不同的体素分辨率（4.4μm、6.2μm、8.3μm和10.2μm）重建其三维孔隙尺度图像，且扫描的物理视场保持一致。 S.M.Shah、F. Gray、J.P. Crawshaw及E.S. Boek，2015年。《多孔介质流动的微计算机断层扫描孔隙尺度研究：体素分辨率的影响》，《水科学进展》2015年7月，DOI:10.1016/j.advwatres.2015.07.012 本研究谨此感谢卡塔尔碳酸盐岩与碳封存研究中心（Qatar Carbonates and Carbon Storage Research Centre, QCCSRC）的出版许可与资助，该中心由卡塔尔石油公司（Qatar Petroleum）、壳牌（Shell）及卡塔尔科学技术园区联合提供支持。卡塔尔石油公司保留所有版权。
