Abstract:

The northern basin of the South Yellow Sea is the only foreland basin formed by landland collision orogeny during the Mesozoic era in the offshore region of China, and can be divided into four stages in terms of tectonic evolution: (1)the passive continental margin basin stage before the orogenics (ZT2); (2)the foreland basin stage in the late phase of the SuLu orogenic process (J3K); (3)the postorogenic intracontinental faulted basin stage (K2tE); (4)the regional subsidence and coverage stage (NQ) The detailed investigation results of the intracontinental faulted basin indicate that the source rocks of the late Cretaceous period in the basin are well developed, and that they feature four combinations of reservoir and cover rocks, numerous trap structures, and excellent poolforming conditions This is the primary target of key oil and gas breakthroughs today in the South Yellow Sea, and the oil resource amount is estimated at about 20×108 t, which is of strategic significance for breaking the deadlock in oil and gas exploration in the South Yellow Sea.

Key words:

the north of the South Yellow Sea; forelandbasin; exploration target