Microstructural evolution of gas hydrates in sedimentary matrices observed with synchrotron X-ray computed tomographic microscopy

Publication type:
Journal article
Metadata:
Autoren
Sammlungen
  • metadata
ISSN
1525-2027
Ausgabe der Veröffentlichung
6
Zeitschrift
Geochemistry, Geophysics, Geosystems
Schlüsselwörter
  • 550 Geowissenschaften
  • 550 Earth sciences
Sprache
eng
Paginierung
Seiten: 1711 - 1722
Datum der Veröffentlichung
2015
Herausgeber
Wiley
Herausgeber URL
http://dx.doi.org/10.1002/2015GC005811
Datum der Datenerfassung
2020
Datum, an dem der Datensatz öffentlich gemacht wurde
2020
Zugang
Public
Titel
Microstructural evolution of gas hydrates in sedimentary matrices observed with synchrotron X-ray computed tomographic microscopy
Ausgabe der Zeitschrift
16

Data source: METADATA.UB

Other metadata sources:
Autoren
Autoren-URL
https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=fis-test-1&SrcAuth=WosAPI&KeyUT=WOS:000358007800002&DestLinkType=FullRecord&DestApp=WOS_CPL
DOI
10.1002/2015GC005811
eISSN
1525-2027
Externe Identifier
  • Clarivate Analytics Document Solution ID: CM9DV
Ausgabe der Veröffentlichung
6
Zeitschrift
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
Schlüsselwörter
  • gas-hydrates
  • growth
  • microstructure
  • memory effect
  • microtomography
  • poroelastic properties
Paginierung
1711 - 1722
Datum der Veröffentlichung
2015
Status
Published
Titel
Microstructural evolution of gas hydrates in sedimentary matrices observed with synchrotron X-ray computed tomographic microscopy
Sub types
  • Article
Ausgabe der Zeitschrift
16

Data source: Web of Science (Lite)

Abstract
<jats:title>Abstract</jats:title><jats:p>The formation process of gas hydrates in sedimentary matrices is of crucial importance for the physical and transport properties of the resulting aggregates. This process has never been observed in situ at submicron resolution. Here we report on synchrotron‐based microtomographic studies by which the nucleation and growth processes of gas hydrate were observed at 276 K in various sedimentary matrices such as natural quartz (with and without admixtures of montmorillonite type clay) or glass beads with different surface properties, at varying water saturation. Both juvenile water and metastably gas‐enriched water obtained from gas hydrate decomposition was used. Xenon gas was employed to enhance the density contrast between gas hydrate and the fluid phases involved. The nucleation sites can be easily identified and the various growth patterns are clearly established. In sediments under‐saturated with juvenile water, nucleation starts at the water‐gas interface resulting in an initially several micrometer thick gas hydrate film; further growth proceeds to form isometric single crystals of 10–20 µm size. The growth of gas hydrate from gas‐enriched water follows a different pattern, <jats:italic>via</jats:italic> the nucleation in the bulk of liquid producing polyhedral single crystals. A striking feature in both cases is the systematic appearance of a fluid phase film of up to several micron thickness between gas hydrates and the surface of the quartz grains. These microstructural findings are relevant for future efforts of quantitative rock physics modeling of gas hydrates in sedimentary matrices and explain the anomalous attenuation of seismic/sonic waves.</jats:p>
Autoren
DOI
10.1002/2015gc005811
eISSN
1525-2027
ISSN
1525-2027
Ausgabe der Veröffentlichung
6
Zeitschrift
Geochemistry, Geophysics, Geosystems
Sprache
en
Online publication date
2015
Paginierung
1711 - 1722
Datum der Veröffentlichung
2015
Status
Published
Herausgeber
American Geophysical Union (AGU)
Herausgeber URL
http://dx.doi.org/10.1002/2015gc005811
Datum der Datenerfassung
2023
Titel
Microstructural evolution of gas hydrates in sedimentary matrices observed with synchrotron <scp>X</scp>‐ray computed tomographic microscopy
Ausgabe der Zeitschrift
16

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