Constraint of Meso-Cenozoic tectonic evolution on hydrocarbon-generation evolution of marine strata in Southern China

The hydrocarbon-generation evolution is controlled by the difference between macroscope tectonic evolution and dynamics in marine strata in southern China since Mesozoic. The analyses of tectonic evolution and burial history since Indosinian epoch and hydrocarbon-generation evolution show differential tectonic evolution has resulted in the different hydrocarbon fluid sources in different structural reformation areas. In upper Yangtze region, the hydrocarbon fluid source includes kerogen-cracking gas, oil-cracking gas, water-soluble gas and secondary bitumen-cracking gas. There are protogenic hydrocarbon and hydrocarbon generated secondly from kerogen in the reversed area of fault depression in lower Yangtze region, Jianghan fault depression, Chuxiong basin and Shiwanshan area. The type of hydrocarbon fluid source is secondary hydrocarbon in reversed fault block area in middle Yangtze region, and kerogen-cracking gas, oil-cracking gas and secondary hydrocarbon in Jiangnan uplift.