Influence of Particle Size Distribution on the Physical Characteristics of Pore-Filling Hydrate-Bearing Sediment

Nature gas hydrates (NGHs) are regarded as a potential alternative energy source due to their huge reserves and wide distribution. According the geophysical surveys, pore-filling occupy large proportion of global hydrate reserves, especially for marine regions. Therefore, with novel pore-scale 3D morphological modeling algorithm, this study systematically studied effect particle size on physical characteristics hydrate-bearing sediment (HBS). The pore system evaluations permeability simulations were performed by utilizing network (PNM), thermal electrical conducted finite volume method (FVM). results show that HBS smaller size, average radius pores throats would also be reduced, fractal dimension increased. In addition, increasing saturation, will increase firstly then decrease. And these parameter evolutions could impact properties correspondingly; specifically, decreasing in reduce conductivity enhance apparent HBS.