Journal cover Journal topic
Solid Earth An interactive open-access journal of the European Geosciences Union

Journal metrics

  • IF value: 3.495 IF 3.495
  • IF 5-year<br/> value: 3.386 IF 5-year
    3.386
  • CiteScore<br/> value: 3.70 CiteScore
    3.70
  • SNIP value: 0.783 SNIP 0.783
  • SJR value: 1.039 SJR 1.039
  • IPP value: 1.987 IPP 1.987
  • h5-index value: 20 h5-index 20
https://doi.org/10.5194/se-2017-106
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 4.0 License.
Research article
25 Sep 2017
Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Solid Earth (SE).
Squirt flow due to interfacial water films in hydrate bearing sediments
Kathleen Sell1, Beatriz Quintal2, Michael Kersten1, and Erik H. Saenger3,4 1Johannes Gutenberg-University Mainz, Germany
2University of Lausanne, Switzerland
3International Geothermal Center, University of Applied Sciences Bochum, Germany
4Ruhr University Bochum, Germany
Abstract. Sediments containing gas hydrate dispersed in the pore space are known to show a characteristic seismic anomaly which is a high attenuation along with increasing seismic velocities. Currently, this observation cannot be fully explained albeit squirt-flow type mechanisms at the microscale have been speculated to be the cause. Recent major findings from in-situ experiments coupled with high-resolution synchrotron-based X-ray micro-tomography revealed a systematic presence of thin water films between the quartz grains and the encrusting hydrate. In this study, the data was obtained from the experiments and underwent an image processing procedure to quantify the thicknesses and geometries of the aforementioned interfacial water films. Overall, the water films vary from sub-μm to a few μm in thickness where some of them are interconnected by water bridges. This geometrical analysis is then used to propose a new conceptual squirt flow model for hydrate bearing sediments. Subsequently the established model acts as a direct model input to obtain seismic attenuation. Our results support previous speculations that squirt flow can explain high attenuation at seismic frequencies in hydrate bearing sediments, but based on a conceptual squirt flow model which is different than those previously considered.

Citation: Sell, K., Quintal, B., Kersten, M., and Saenger, E. H.: Squirt flow due to interfacial water films in hydrate bearing sediments, Solid Earth Discuss., https://doi.org/10.5194/se-2017-106, in review, 2017.
Kathleen Sell et al.
Kathleen Sell et al.
Kathleen Sell et al.

Viewed

Total article views: 216 (including HTML, PDF, and XML)

HTML PDF XML Total BibTeX EndNote
168 44 4 216 2 1

Views and downloads (calculated since 25 Sep 2017)

Cumulative views and downloads (calculated since 25 Sep 2017)

Viewed (geographical distribution)

Total article views: 216 (including HTML, PDF, and XML)

Thereof 216 with geography defined and 0 with unknown origin.

Country # Views %
  • 1

Saved

Discussed

Latest update: 24 Nov 2017
Publications Copernicus
Download
Short summary
Sediments containing hydrates dispersed in the pore space are known to show a characteristic seismic anomaly which is a high attenuation along with increasing seismic velocities. Recent major findings from SRXCT experiments revealed a systematic presence of thin water films betweeen quartz and the gas hydrate. Our studies support earlier speculations of squirt flow causing high attenuation at seismic frequencies but are based on a conceptual model different than those previously considered.
Sediments containing hydrates dispersed in the pore space are known to show a characteristic...
Share