POTENTIALITY AND STRATEGIC SELECTION PLAYS OF PETROLEUM EXPLORATION IN MARINE STRATA NEARBY SOUTHERN MARGIN OF EAST QINLING-DABIE OROGENIC BELT

The complex tectonic system of East Qinling-Dabie orogenic belt and its southern basin has been formed in uniform earth dynamic background.The margin of East Qinling-Dabie orogenic belts has developed typical passive continental edge from Sinian to Silurian,and early rift basins,passive continental edge,and forland basin from Neopaloezoic to early Mesozoic,finally block-faulted orogenic during Neomesozoic and Cenozoic.Different kinds of prototype basins have been supplied with kinds of realms to explore,through developing formations of transverse juxtaposition and longitudinal overlap for the foundation of reserve substance.The forland fault-thrusted belts are thought of large exploration potentiality for the petroleum reserve and weak tectonic transformation.The direction to strategic selection plays of petroleum exploration should focus on 3 different realms to realize for breakthrough:marine "lowdown type","shadow basin type",and "unconvention type " in the region.