This kind of compounds usually exists within the sediments from the continental margins and also within the permafrosts of the polar areas, but the amount of gas hydrates occurring in the continental margins exceeds 90 % of the total amount of gas hydrates existing in the whole world. 尽管此种化合物通常分布于大陆边缘沉积物和极地永冻层内,但前者的水合物赋存量占据全球天然气水合物总量的90%以上。