Abstract:

Central Yangzi Basin belongs to the central part of Yangzi Paraplatform.Its basement was formed by Zhongtiao-Wuling Orogenies.The basin experienced multy-stage and multy type tectogenesis dominated by compressive tectonic en-vironment,thus the open-sea basin in the Sinian-Middle Triassic,huge coal-bearing lacustrine basin of the intercont inent in the Late Triassic to Jurassic andmultycycle basin of the brine lake in the Cretaceous to Tertiary were formed before and after.The main tectonic units of the present time include Jianghan Basin in the central part of the platform,overthrust tectonic belts in the north-eastern and southeastern margin and gravity-glide faults in the west part ofthe region.The basin has congenitally favourable conditions for hydrocarbon generation due to its great thickness of sedimental covers and multyple source-reservoir rock as semblages.The above mentioned three tectonic units are still prospectivefor oil and gas exploration though marine sediments there were seriously damaged by Yanshan Orogeny.The authors suggest that we have to take the compre hensiveresearch with the purpose of breaking through the Paleozoic-Mesozoic oil and gad on the basis of regional geophysical prospecting and parameter-well drilling.