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DEM modelling of methane hydrate bearing sand

Journal Article


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Abstract


  • Methane gas hydrates are crystalline compounds formed from water and methane under certain pressure and

    temperature. They are mostly found in marine continental margin sediments and beneath the permafrost and considered

    as the future non-conventional energy resource. In order to develop innovative techniques for the safe extraction of

    methane gas from Methane Hydrate (MH) it is important to understand the shear behaviour of methane hydrate bearing

    sand. It has been reported that the pore scale habits of MH have a significant influence on the shear behaviour of

    methane hydrate bearing sand. In this paper, an attempt has been made to capture the effect of pore scale habits on the

    shear behaviour of methane hydrate bearing sand using the Discrete Element Method. Two modelling approaches (i)

    pore filling, leading to load bearing, and (ii) cementation, bonding of the interparticle contact, have been simulated

    using PFC3D. A series of triaxial monotonic tests were carried on an assembly of particles for different methane

    hydrate saturations. Both the approaches have captured, qualitatively, the stress ratio- axial strain behaviour similar to

    the laboratory experiments. The DEM simulation results highlight that MH saturation has a profound influence on the

    shear behaviour of hydrate bearing sand. It was shown that the cementation habit closely captures the variation of peak

    deviator stress with MH saturation similar to the laboratory experiments. Moreover, the evolution of micro-mechanical

    parameter (e.g. contact force and bond breakage) during shear loading has been presented and discussed.

UOW Authors


  •   Jayan Sylaja, Vinod
  •   Hyodo, Masayuki (external author)
  •   Indraratna, Buddhima (external author)
  •   Miller, Roy K. (external author)

Publication Date


  • 2014

Citation


  • Vinod, J. S., Hyodo, M., Indraratna, B. & Miller, R. K. (2014). DEM modelling of methane hydrate bearing sand. Australian Geomechanics Journal, 49 (4), 175-182.

Scopus Eid


  • 2-s2.0-84922554458

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=4434&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/3417

Has Global Citation Frequency


Number Of Pages


  • 7

Start Page


  • 175

End Page


  • 182

Volume


  • 49

Issue


  • 4

Place Of Publication


  • Australia

Abstract


  • Methane gas hydrates are crystalline compounds formed from water and methane under certain pressure and

    temperature. They are mostly found in marine continental margin sediments and beneath the permafrost and considered

    as the future non-conventional energy resource. In order to develop innovative techniques for the safe extraction of

    methane gas from Methane Hydrate (MH) it is important to understand the shear behaviour of methane hydrate bearing

    sand. It has been reported that the pore scale habits of MH have a significant influence on the shear behaviour of

    methane hydrate bearing sand. In this paper, an attempt has been made to capture the effect of pore scale habits on the

    shear behaviour of methane hydrate bearing sand using the Discrete Element Method. Two modelling approaches (i)

    pore filling, leading to load bearing, and (ii) cementation, bonding of the interparticle contact, have been simulated

    using PFC3D. A series of triaxial monotonic tests were carried on an assembly of particles for different methane

    hydrate saturations. Both the approaches have captured, qualitatively, the stress ratio- axial strain behaviour similar to

    the laboratory experiments. The DEM simulation results highlight that MH saturation has a profound influence on the

    shear behaviour of hydrate bearing sand. It was shown that the cementation habit closely captures the variation of peak

    deviator stress with MH saturation similar to the laboratory experiments. Moreover, the evolution of micro-mechanical

    parameter (e.g. contact force and bond breakage) during shear loading has been presented and discussed.

UOW Authors


  •   Jayan Sylaja, Vinod
  •   Hyodo, Masayuki (external author)
  •   Indraratna, Buddhima (external author)
  •   Miller, Roy K. (external author)

Publication Date


  • 2014

Citation


  • Vinod, J. S., Hyodo, M., Indraratna, B. & Miller, R. K. (2014). DEM modelling of methane hydrate bearing sand. Australian Geomechanics Journal, 49 (4), 175-182.

Scopus Eid


  • 2-s2.0-84922554458

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=4434&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/3417

Has Global Citation Frequency


Number Of Pages


  • 7

Start Page


  • 175

End Page


  • 182

Volume


  • 49

Issue


  • 4

Place Of Publication


  • Australia