On the path to the digital rock physics of gas hydrate-bearing sediments – processing of in situ synchrotron-tomography data
To date, very little is known about the distribution of natural gas hydrates in sedimentary matrices and its influence on the seismic properties of the host rock, in particular at low hydrate concentration. Digital rock physics offers a unique approach to this issue yet requires good quality, high-r...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2016-08-01
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| Series: | Solid Earth |
| Online Access: | http://www.solid-earth.net/7/1243/2016/se-7-1243-2016.pdf |
| Summary: | To date, very little is known about the distribution of
natural gas hydrates in sedimentary matrices and its influence on the seismic
properties of the host rock, in particular at low hydrate concentration.
Digital rock physics offers a unique approach to this issue yet requires good
quality, high-resolution 3-D representations for the accurate modeling of
petrophysical and transport properties. Although such models are readily
available via in situ synchrotron radiation X-ray tomography, the analysis of
such data asks for complex workflows and high computational power to maintain
valuable results. Here, we present a best-practice procedure complementing
data from Chaouachi et al. (2015)
with data post-processing, including image enhancement and segmentation as
well as exemplary numerical simulations of an acoustic wave propagation in
3-D using the derived results. A combination of the tomography and 3-D
modeling opens a path to a more reliable deduction of properties of gas hydrate-bearing sediments without a reliance on idealized and frequently
imprecise models. |
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| ISSN: | 1869-9510 1869-9529 |