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Solid Earth, 7, 1243-1258, 2016
https://doi.org/10.5194/se-7-1243-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
Method article
22 Aug 2016
On the path to the digital rock physics of gas hydrate-bearing sediments – processing of in situ synchrotron-tomography data
Kathleen Sell1, Erik H. Saenger2,3, Andrzej Falenty4, Marwen Chaouachi4, David Haberthür5, Frieder Enzmann1, Werner F. Kuhs4, and Michael Kersten1 1Institute of Geosciences, Johannes Gutenberg University, Mainz, Germany
2International Geothermal Centre, Bochum, Germany
3Ruhr University, Bochum, Germany
4GZG Crystallography, Georg August University, Göttingen, Germany
5Swiss Light Source, Paul Scherrer Institute, Villigen, Switzerland
Abstract. 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.

Citation: Sell, K., Saenger, E. H., Falenty, A., Chaouachi, M., Haberthür, D., Enzmann, F., Kuhs, W. F., and Kersten, M.: On the path to the digital rock physics of gas hydrate-bearing sediments – processing of in situ synchrotron-tomography data, Solid Earth, 7, 1243-1258, https://doi.org/10.5194/se-7-1243-2016, 2016.
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