Quantitative micro-porosity characterization using synchrotron micro-CT and xenon K-edge subtraction in sandstones, carbonates, shales and coal

被引：78

作者：

Mayo, Sheridan ^{[1
]}

Josh, Matthew ^{[2
]}

Nesterets, Yakov ^{[1
]}

Esteban, Lionel ^{[2
]}

Pervukhina, Marina ^{[2
]}

Ben Clennell, Michael ^{[2
]}

Maksimenko, Anton ^{[3
]}

Hall, Chris ^{[3
]}

机构：

[1] CSIRO Mfg Flagship, Clayton, Vic 3169, Australia

[2] CSIRO Energy Flagship, ARRC, Kensington, NSW 6151, Australia

[3] Australian Synchrotron, Clayton, Vic, Australia

来源：

FUEL | 2015年 / 154卷

关键词：

Micro-CT; Contrast-agent; Synchrotron; Porosity; Carbonate; K-edge subtraction; RAY COMPUTERIZED-TOMOGRAPHY; MERCURY POROSIMETRY; GAS; MICROSTRUCTURE; TRANSPORT; ROCKS;

D O I：

10.1016/j.fuel.2015.03.046

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

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.

引用

页码：167 / 173

页数：7

共 26 条

[1] Three dimensional imaging of porosity and tracer concentration distributions in a dolostone sample during diffusion experiments using X-ray micro-CT [J].