Scattered in these offshore waters are more than 30 sedimentation basins,with a total area of nearly 700,000 sq km. It is estimated that there are about 25 billion tons of oil resources and 8.4 trillion cu m of natural gas in these basins.

• 中国海域有30多个沉积盆地，面积近70万平方公里，石油资源量约250亿吨，天然气资源量约8.；4万亿立方米。