Triaxial Compressive Property of Artificial CO2-Hydrate Sand

摘要

Carbon dioxide (CO2) injection into marine sediments is considered to be a supplementary method for enhancing methane (CH4) recovery from CH4-hydrate reservoirs. It is essential to consider the geomechanical characteristics of CO2-hydrate sediments to ensure sustainable CH4-hydrate production using CO2 injection. Experimental methods involving drained triaxial compression tests on artificial CO2-hydrate sand specimens were developed. The mechanical property of CO2-hydrate sand specimens was compared with that of CH4-hydrate sand specimens. The difference in the mechanical property of CO2-hydrate and CH4-hydrate sand specimens was thought to be due to crystal growth and/or cavity occupancy in load-bearing hydrate.