Pore Habit of Gas in Gassy Sediments

Gas bubbles are widespread in seafloors and lakebeds typically found shallow fine-grained sediments. Sediment properties control gas nucleation migration. migration pathways have been studied mostly clean coarse particles or matrices. Nevertheless, both cases show very distinct geo-behaviors. Pore habit is defined by the counteracting effects of effective stress pore-throat-dependent capillary pressure. In this article, we explore CO2 exsolution its consequent gas-driven fractures (open-mode discontinuities) pore invasion binary sediments as a function fines content (FC). We conducted physical test analogies for different FC subjected to exsolution. Our results highlight that gassy depends on capability invade neighboring (capillarity) burial depth (effective stress). load dominant fraction soils can be used estimate throat size. then proposed robust methodology predict from recent developments soil behavior characterization. Finally, applied it real case offshore Vancouver Island.