更具开发前景的浅成天然气水合物

浅成天然气水合物呈致密块状赋存在海床面上或海床附近,在全球大陆坡上有广范的分布,由于其饱和度高及赋存部位浅因而被认为更适于开采。与甲烷渗漏、气体烟囱和水合物丘密切相伴的浅成天然气水合物,是在构造活动带由高通量的富甲烷流体以集束方式沿断层或断裂破碎带上升形成的。推测在我国南海北坡也可能存在浅成天然气水合物。

SHALLOW GAS HYDRATES,A TYPE OF HYDRATE DEPOSITS MORE SUITABLE FOR PRODUCTION

Shallow gas hydrates occur as massive aggregates on the seafloor or in near-surface sediments, and are widely distributed on the continental slopes. They are characterized by high saturation and shallow occurrence,and therefore are considered more suitable for production. Shallow gas hydrates are closely associated with methane seeps, gas chimneys and hydrate mounds, and formed by high flux fluid migrated through faults in the tectonic settings. It is inferred that shallow gas hydrate deposits may occur in the SCS.