Analysis of the Mechanical Properties of the Reconstituted Hydrate-Bearing Clayey-Silt Samples from the South China Sea

Mechanical properties of hydrate-bearing sediments (HBS) are crucial for evaluating drilling- and production-induced geo-hazards. However, investigations on mechanical behaviors clayey-silt samples containing hydrate insufficient due to low efficiency in preparing reconstituted samples. Herein, we carried out a series triaxial shear tests analyze the deformation tetrahydrofuran (THF) hydrate. The were taken from Shenhu Area, northern South China Sea. failure mechanisms during shearing discussed based micro-to-macro analyses. results imply that stress-strain curves show obvious strain-hardening under shearing, which can be divided into elastic stage, transitional plastic stage. Besides, reveal cohesion strengthens 0.09 MPa 1.28 when saturation increases 15% 60%. Moreover, calculation models proposed evaluate strengths Young’s modulus. Establishing empirical formula experimental data quickly determine strength parameters with knowing stress state It is urgent field operations numerical simulation use reliable models.