现代地质2011，Vol.25Issue(2)：340-348,9.
南海东北部陆坡区天然气水合物成矿作用
Metallogenetic Conditions of Gas Hydrate in the Northeastern Slope of the South China Sea
摘要
Abstract
The northeastern slope of the South China Sea has the characteristics of the passive continental margin in Cenozoic and has many oil and gas bearing basins. As a result, the geological and tectonic settings, the temperature and pressure conditions, and the methane-generating potential from the thick organic-rich sediments are all favorable for gas hydrate formation. Through the studies of structure, deposit, gas sources, gas hydrate phase equilibrium and thermodynamic conditions, this paper discussed the favorable situations for gas hydrate formation in the northeastern slope of the South China Sea. The results show that the seafloor temperature, geothermal gradient and stress conditions are favorable for gas hydrate forming; there are special tectonic settings,such as diaper, mud volcano, and slope-fault structure combination; the shallow layers have suitable lithological characteristics and high deposition rate; there are abundant biodegradation gas and thermal-genetic gas. Therefore it comes to the conclusion that the study area is a hydrate prospective area.关键词
天然气水合物/含油气盆地/成矿条件/南海东北部陆坡Key words
natural gas hydrate/ hydrocarbon-bearing basin/ metallogenic condition/ northeastern slope of the South China Sea分类
天文与地球科学引用本文复制引用
杨木壮,沙志彬,梁金强,王宏斌,张光学..南海东北部陆坡区天然气水合物成矿作用[J].现代地质,2011,25(2):340-348,9.基金项目
国家自然科学基金项目(40746028) （40746028）
国土资源部海洋油气资源与环境地质重点实验室项目(MRE200911) （MRE200911）
国土资源部公益性行业科研专项项目(200811014) （200811014）
国家重点基础研究发展计划项目(2009CB219502). （2009CB219502）
