Advanced mechanical testing of gas hydrate-bearing sediments.

Deusner, Christian, Freise, M., Gupta, Shubhangi , Kossel, Elke , Anbergen, H., Wille, T. and Haeckel, Matthias (2017) Advanced mechanical testing of gas hydrate-bearing sediments. [Paper] In: 19. International Conference on Soil Mechanics and Geotechnical Engineering. , 17.-22.09.2017, Seoul, Republic of Korea .

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Abstract

The understanding of thermo-hydro-chemo-mechanical coupling of dynamic processes, which occur in marine gas hydrate-bearing sediments during natural gas production or slope destabilization, is limited. Recent developments in geotechnical testing offer new approaches to closely simulate sub-marine in-situ conditions, and to generate benchmark tests for numerical model development. Especially when applied in combination with tomographic techniques (e.g. X-ray CT or ERT), high-pressure flow-through triaxial testing could answer important questions related to multi-scale effects, influence of spatial heterogeneities and process dynamics on the stress-strain behavior of gas hydrate-bearing sediments. Based on experimental studies on heterogeneous gas hydrate formation from two-phase fluid flow, we demonstrate the need for advanced mechanical testing. Further, we present the setup of advanced geotechnical test systems combined with X-ray CT or ERT analysis, as well as preliminary results from flow-through triaxial testing with the novel systems.

Document Type: Conference or Workshop Item (Paper)
Additional Information: Paper in: ICSMGE 2017 - 19th International Conference on Soil Mechanics and Geotechnical Engineering Volume 2017-September, 2017, Pages 3431-3434
Keywords: Gas hydrates, Marine sediments, Triaxial testing, X-ray tomography
Research affiliation: OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-MG Marine Geosystems
Date Deposited: 10 Jan 2018 07:53
Last Modified: 03 May 2018 07:21
URI: http://oceanrep.geomar.de/id/eprint/41336

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