Quantitative micro-porosity characterization using synchrotron micro-CT and xenon K-edge subtraction in sandstones, carbonates, shales and coal
Quantitative micro-porosity characterization using synchrotron micro-CT and xenon K-edge subtraction in sandstones, carbonates, shales and coal
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DOI：
10.1016/j.fuel.2015.03.046
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发表时间：
2015-08-15
期刊：
影响因子：
7.4
通讯作者：
Hall, Chris
中科院分区：
文献类型：
--
作者：
Mayo, Sheridan;Josh, Matthew;Hall, Chris
了解岩石样品在一系列长度尺度上的孔隙度对于评估与石油和地热资源相关的地球物理性质至关重要。现代显微CT技术可以显示微米级的细节，但不能明确地检测分辨率极限以下的孔隙度。在这里，我们描述了使用同步加速器K-边缘减法使用氙气造影剂探测孔隙度在微米尺度上的岩石类型的范围。氙，这也被用于大规模的研究，是一个有吸引力的对比剂，用于调查非常小的规模孔隙度在非吸附标本，和气体吸收吸附标本。K边缘减法能够精确分离岩石和氙信号，从而即使在无法直接分辨单个孔隙的情况下，也可以定量确定氙渗透率和孔隙度。皇冠版权所有（C）2015由爱思唯尔有限公司出版。保留所有权利。
Understanding porosity in rock specimens on a range of length scales is critical for assessment of geophysical properties relevant to petroleum and geothermal resources. Modern micro-CT techniques can show detail down to around a micron scale but cannot unambiguously detect porosity below the resolution limit. Here we describe the use of synchrotron K-edge subtraction using a xenon gas contrast agent to probe porosity on the micron scale in a range of rock types. Xenon, which has also been used in larger-scale studies, is an attractive contrast agent for investigating very small-scale porosity in non-sorbing specimens, and gas uptake in sorbing specimens. The K-edge subtraction method enables accurate separation of the rock and xenon signal so that xenon penetration and hence porosity can be quantitatively determined even where the individual pores themselves cannot be directly resolved. Crown Copyright (C) 2015 Published by Elsevier Ltd. All rights reserved.