A margin-wide BSR gas hydrate assessment: Canada’s Atlantic margin

摘要: Abstract It is the intent of this paper to explore a significant extent an entire passive continental margin for hydrate occurrence understand modes occurrence, preferred geologic settings and estimate potential volumes methane. The presence gas hydrates offshore eastern Canada has long been inferred from estimated stability zone calculations, but little physical evidence offered. An extensive set 2-D 3-D, single multi-channel seismic reflection data comprising in excess 140,000 line-km was analyzed. Bottom simulating reflections (BSR) were unequivocally identified at seven sites, ranging between 250 445 m below seafloor water depths 620–2850 m. combined area BSRs 9311 km 2 , which comprises small proportion theoretical along Canadian Atlantic (∼715,165 km ). BSR within least six these sites lies sedimentary drift deposit or sediment wave field, indicating likelihood grain sorting porosity permeability (reservoir) development. Although there are variety conditions required generate recognize BSR, one might assume that offer most highest concentration exploitation. Total formation recognized BSR’s 17 190 × 10 9  m 3 0.28 3.12 × 10 13 methane STP. it shown can exist without results regional study argue conservative estimates global reserve margins necessary.