Centrifuge Experimental Simulation of the Effect of Gas Hydrate Dissociation on the Seabed Stability
天然气水合物分解对地层稳定性影响的离心机实验模拟

Dissociation of gas hydrate may cause the strength decrease in hydrate-bearing sediments and result in seabed sinking, slumping and destruction of marine structure foundation. To study this project, first, selecting silty sand from South China Sea as the skeletons, using biological anaerobic fermentation techniques, hydrate-bearing sediments were synthesized. Then centrifuge experimental simulation was conducted to investigate the seabed responses during and after the dissociation of gas hydrate. Characteristics of evolution of the seabed sinking and slumping and the pore water pressure were obtained. This work is expected to be beneficial to further study of the instability conditions of the seabed and the correspondent prevention methods.