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Correlative multi-scale imaging of shales: A review and future perspectives

Ma, L; Fauchille, AL; Dowey, PJ; Pilz, FF; Courtois, L; Taylor, KG; Lee, PD; (2017) Correlative multi-scale imaging of shales: A review and future perspectives. Geological Society Special Publications , 454 pp. 175-199. 10.1144/SP454.11. Green open access

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Abstract

As the fastest growing energy sector globally, shale and shale reservoirs have attracted the attention of both industry and scholars. However, the strong heterogeneity at different scales and the extremely fine-grained nature of shales makes macroscopic and microscopic characterization highly challenging. Recent advances in imaging techniques have provided many novel characterization opportunities of shale components and microstructures at multiple scales. Correlative imaging, where multiple techniques are combined, is playing an increasingly important role in the imaging and quantification of shale microstructures (e.g. one can combine optical microscopy, scanning electron microscopy/transmission electron microscopy and X-ray radiography in 2D, or X-ray computed tomography and electron microscopy in 3D). Combined utilization of these techniques can characterize the heterogeneity of shale microstructures over a large range of scales, from macroscale to nanoscale (c. 100-10-9 m). Other chemical and physical measurements can be correlated to imaging techniques to provide complementary information for minerals, organic matter and pores. These imaging techniques and subsequent quantification methods are critically reviewed to provide an overview of the correlative imaging workflow. Applications of the above techniques for imaging particular features in different shales are demonstrated, and key limitations and benefits summarized. Current challenges and future perspectives in shale imaging techniques and their applications are discussed.

Type: Article
Title: Correlative multi-scale imaging of shales: A review and future perspectives
Open access status: An open access version is available from UCL Discovery
DOI: 10.1144/SP454.11
Publisher version: https://doi.org/10.1144/SP454.11
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: shale, correlative imaging, quantification, multi-scale, microstructure, microscopy, X-ray computed tomography
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/10062980
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