THE DISTRIBUTION OF OIL AND GAS FIELDS IN JIYANG DEPRESSION OF THE BOHAI BAY BASIN IN VIEWPOINT OF WAVE-LIKE MOVEMENT

Characteristics of depositional and tectonic activities in Jiyang depression and dustpanshaped structures which were faulted on the northern margin and overlapped on the southern flank showed that mantle plume was migrated in wave-like from south to north. Thatwas verified by tectonophysic modedelling experiment. The migration of mantle plume inwave-like led to the wave-like movement of crust, as a result, Jiyang depression of the Bohai bay basin was formed. Wave-like movement controlled the occurrence of sags and theirarchitectures,the orderly shifting of depositional and tectonic subsidence centers, and theareal distribution of oil accumulations.