Mechanical and dissociation properties of methane hydrate-bearing sand in deep seabed

Hyodo, Masayuki; Yoneda, Jun; Yoshimoto, Nobuko; Nakata, Yoshihiro

doi:10.1016/j.sandf.2013.02.010

Cited by 323 publications

(313 citation statements)

References 15 publications

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“…In order to validate the newly proposed MH bond model, thermal recovery and depressurization processes were simulated on MHBS samples under the same test conditions as those in [28]. In a MHBS sample, sand particles were modelled as 2D disks and MH bond were simulated virtually by specifying bonding parameters as described in Section 2.…”

Section: Sample Preparationmentioning

confidence: 99%

“…Then an effective confining pressure σ'=0.2 MPa was applied isotropically until the (31) and (23), respectively. The effective confining pressure σ' was then increased from 0.2MPa to 5MPa by moving boundaries to simulate the submarine condition as achieved in [28],…”

Section: Sample Preparationmentioning

confidence: 99%

“…Hereafter the effective confining pressure σ' was maintained at 5MPa. Three deviator stresses of 0MPa, 3.8MPa and 6.8MPa were applied, equivalent to those in [28], corresponding to deviator stresses being zero, smaller than the strength of pure sand and larger than the strength of pure sand, respectively.…”

Section: Sample Preparationmentioning

confidence: 99%

“…The results have shown that there is a volumetric contraction regardless the initial MH saturation and the contraction ratio increases with the increase of saturation. Hyodo et al [28] investigated the changes of MHBS mechanical properties during MH dissociation using an improved triaxial apparatus. The results indicate that dissociation can lead to volumetric contraction, and the stress-strain relationship depends on the deviator stress applied.…”

Section: Introductionmentioning

confidence: 99%

“…This model was then implemented into a DEM platform, PFC2D, to simulate the MHBS exploitation by thermal recovery and depressurization. DEM simulation test results were then compared with laboratory tests conducted by Hyodo et al [28] to validate the new model.…”

Section: Introductionmentioning

confidence: 99%

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DEM simulations of methane hydrate exploitation by thermal recovery and depressurization methods

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Section: Sample Preparationmentioning

confidence: 99%

Section: Sample Preparationmentioning

confidence: 99%

Section: Sample Preparationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Mechanical behavior of gas‐saturated methane hydrate‐bearing sediments

et al. 2013

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[1] A series of triaxial compression tests were conducted in order to investigate the mechanical behavior of gas-saturated methane hydrate-bearing sediments, and a comparison was made between gas-saturated and water-saturated specimens. Measurements on gas-saturated specimens indicate that (1) the larger the methane hydrate saturation, the larger the failure strength and the more apparent the shear dilation behavior; (2) failure strength and stiffness increase with increasing effective confining stress and pore pressure applied during compression, though the specimen becomes less dilative under higher effective confining stress; (3) lower temperatures lead to an increase of the stiffness and failure strength; (4) stiffness of specimens formed under lower pore pressure is higher than that of specimens formed under higher pore pressure but at the same effective stress; (5) stiffness and failure strength of gas-saturated specimens are higher than those of watersaturated specimens; (6) gas-saturated specimens show more apparent strain-softening behavior and larger volumetric strain than that of water-saturated specimens.

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Experimental verification of a prediction model for hydrate‐bearing sand

Pinkert

Grozic

2016

JGR Solid Earth

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This paper presents an experimental verification of a prediction model for the mechanical properties of hydrate‐bearing sand. The model is examined using experimental drained triaxial test results of three independent data sets, which are associated with different hydrate formations and testing conditions. For each data set, an optimization process is applied based on numerical modeling of the testing conditions in order to evaluate the pure sand properties. Based on these properties, the model forecasts the stress‐stain curves for different hydrate saturations, based on an advanced hydrate simulator. Although the model does not show a fair forecast with “ice‐seeding” hydrate formation samples and for specimens tested under gas saturation, it predicts the mechanical behavior of samples with “partly saturated” hydrate formation tested under water saturation.

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Mechanical and dissociation properties of methane hydrate-bearing sand in deep seabed

Cited by 323 publications

References 15 publications

DEM simulations of methane hydrate exploitation by thermal recovery and depressurization methods

DEM simulations of methane hydrate exploitation by thermal recovery and depressurization methods

Mechanical behavior of gas‐saturated methane hydrate‐bearing sediments

Experimental verification of a prediction model for hydrate‐bearing sand

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