Evaluation of gas hydrate stability in marine sediments is commonly conducted assuming pure methane systems, although increasing drilling and logging evidence indicates that natural gas hydrates frequently contain minor amounts of heavier hydrocarbons. In the northern South China Sea, the presence of ethane has been widely reported, yet its influence on hydrate phase equilibrium and the distribution of the gas hydrate stabilit...

Submarine methane-rich fluids migrating through geological conduits significantly influence gas hydrate production during depressurization. However, the coupled effects of methane, water, and heat delivered by these fluids on hydrate dissociation and methane recovery remain unclear. This study establishes a conceptual coupled numerical model of “pressure reduction–fluid response–reservoir evolution” based on reservoir paramete...