Mechanical properties of clathrate hydrates: status and perspectives

Mechanical properties of hydrate-bearing turbidite reservoir in the first gas production test site of the Eastern Nankai Trough

“…During depressurization, the solid MH in the pores within the sandy sediments was dissociated into gas and water for collection. During depressurization, complex physical changes (such as the loose bearing capacity of hydrate and changes induced in the soil skeletal structure by increasing effective stress) and gas and water migration may contribute to geohazards such as subsea landslides, seafloor subsidence, and differential settlement (Bugge et al, 1988;Collett and Dallimore, 2002;Kleinberg, 2005;Ning et al, 2012;Sakamoto et al, 2009;Yoneda et al, 2011).…”

Mechanical behavior of hydrate-bearing pressure-core sediments visualized under triaxial compression

“…Dissociation of gas hydrate in sediments may affect the stability of subsea structures and well borings, increase the occurrence of geohazards (e.g., subsea landslides and seafloor subsidence), and influence gas productivity (Bugge et al, 1988;Collett and Dallimore, 2002;Kleinberg, 2005;Sakamoto et al, 2009;Fulong et al, 2012). Previous laboratory tests using synthetic gas hydrate-bearing sands have included triaxial and plane strain compression tests to investigate mechanical properties (Hyodo et al, 2005(Hyodo et al, , 2013Yun et al, 2007;Miyazaki et al, 2011;Yoneda et al, 2013a).…”

Mechanical behaviors of permafrost-associated methane hydrate-bearing sediments under different mining methods

“…However, there are many uncertainties in the production process, especially related to the deformation of the ground caused by hydrate dissociation [7]. The gas trapped in the hydrates can be released fiercely which may cause well-control problems, consolidation and shear deformation of the ground and in turn produce geological disasters and climate effects [15].…”