Experimental study on mechanical properties of methane-hydrate-bearing sediments

Zhang, Xuhui; Lu, Xiaobing; Zhang, Limin; Wang, Shuyun; Li, Qingping

doi:10.1007/s10409-012-0142-3

Cited by 75 publications

(57 citation statements)

References 30 publications

(45 reference statements)

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“…A vast variety of triaxial shear tests have been performed on HBS to understand the stress-strain behavior under different hydrate saturations (Yun et al, 2007;Miyazaki et al, 2011;Zhang et al, 2012;Ghiassian and Grozic, 2013;Hyodo et al, 2013;Hyodo et al, 2014;Li et al, 2016). Based on these experimental data, various constitutive models of HBS have been proposed and improved (Pinkert and Grozic, 2014;Lin et al, 2015;Pinkert et al, 2015;Sun et al, 2015;Shen et al, 2016;Uchida et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Numerical simulations for analyzing deformation characteristics of hydrate-bearing sediments during depressurization

Liu

Zhang

et al. 2017

Adv. Geo-Energ. Res.

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Natural gas hydrates have been treated as a potential energy resource for decades. Understanding geomechanical properties of hydrate-bearing porous media is an essential to protect the safety of individuals and devices during hydrate production. In this work, a numerical simulator named GrapeFloater is developed to study the deformation behavior of hydrate-bearing porous media during depressurization, and the numerical simulator couples multiple processes such as conductive-convective heat transfer, two-phase fluid flow, intrinsic kinetics of hydrate dissociation, and deformation of solid skeleton. Then, a depressurization experiment is carried out to validate the numerical simulator. A parameter sensitivity analysis is performed to discuss the deformation behavior of hydrate-bearing porous media as well as its effect on production responses. Conclusions are drawn as follows: the numerical simulator named GrapeFloater predicts the experimental results well; the modulus of hydrate-bearing porous media has an obvious effect on production responses; final deformation increases with decreasing outlet pressure; both the depressurization and the modulus decrease during hydrate dissociation contribute to the deformation of hydrate-bearing porous media.

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Section: Introductionmentioning

confidence: 99%

Numerical simulations for analyzing deformation characteristics of hydrate-bearing sediments during depressurization

Liu

Zhang

et al. 2017

Adv. Geo-Energ. Res.

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“…Thus, HBS must have internal friction and cohesion. The MohrColumn constitutive relation is shown to be suitable for describing the HBS behavior (Zhang et al 2012) and was used in the numerical simulation:…”

Section: Controlling Equationsmentioning

confidence: 99%

“…The reason is that the vertical stress applied on the HBS increases with the rise of H/h, and consequently, the strength of HBS and the interface both also increase; meanwhile, the over layer is just like a deep beam over HBS that the end resistance of Internal friction angle and cohesion are two parameters in Mohr-Coulomb criterion for describing the strength of sediment. According to the experimental results on the properties of HBS (Zhang et al 2012), four values of the internal friction angle after NGH dissociation 0°, 2.68°, 5.33°and 10°and five values of cohesion 0, 1 9 10 4 , 5 9 10 4 , 1 9 10 5 and 1 9 10 6 Pa were adopted for analyzing the effects on CD. The results are shown in Fig.…”

Section: Effects Of Main Dimensionless Parameters On CDmentioning

confidence: 99%

Numerical simulation on the marine landslide due to gas hydrate dissociation

Chen

et al. 2017

Environ Earth Sci

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Marine landslide due to gas hydrate dissociation is a kind of potential heavy hazards. Numerical simulation was processed to investigate the deformation, landslide and effects of main factors on the critical scale of dissociation zone to induce marine landslides during/after dissociation of gas hydrate. A simple method for analyzing the critical scale was presented based on the limit equilibrium method. It is shown that the maximum settlement is located near the upper side of the dissociation zone. The soil near the lower side of the dissociation zone uplifts. There is a critical scale of dissociation zone over which landslide will occur under given conditions. Expansion modes of the dissociation zone have obvious effects on the critical scale.

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“…Since Shih et al made the first experimental observation of the self-bending of screening solitons [1], the self-bending of spatial solitons is further studied by experiment and numerical simulation method [2][3][4][5][6][7][8][9][10][11][12][13][14]. When the optical beam size is in the range of the charge carrier diffusion length, the diffusion effect cannot be neglected.…”

Section: Introductionmentioning

confidence: 99%

Dynamic behavior of spatial bright solitons in a biased transversely shifting photorefractive crystal

Gao

et al. 2012

Appl. Phys. B

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We have observed and simulated the dynamic evolution of a beam launched into a biased transversely shifting photorefractive crystal. Propagating in this scheme, the beam can trap into spatial solitons and then deflect to the beam shifting side. The deflected amplitude of solitons relates to the shifting velocity of the sample (beam). At a higher shifting velocity, the bending amplitude of the beam will be decreased. We attribute this bending to the nonlinear relaxation effect present in the samples. The experiment and the simulation show fairly good agreement.

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Experimental study on mechanical properties of methane-hydrate-bearing sediments

Cited by 75 publications

References 30 publications

Numerical simulations for analyzing deformation characteristics of hydrate-bearing sediments during depressurization

Numerical simulations for analyzing deformation characteristics of hydrate-bearing sediments during depressurization

Numerical simulation on the marine landslide due to gas hydrate dissociation

Dynamic behavior of spatial bright solitons in a biased transversely shifting photorefractive crystal

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