The complex prospecting oil areas in southern China can be divided into four different tectonic-sedimentary types by different Standards. Based on calculating hydrocarbon-generating amount and natural gas-dissipating amount caused by non-tectonics, the potential of hydrocarbon accumulation in order of types from good to bad is the uplift-exposure during Himalayan orogeny, uplift-exposure during Yanshan orogeny, the alternated uplift-subsidence during Yanshanian orogeny, the early uplift-exposure to the late shallow burial during Hercynian-Indosinian orogeny. It is shown that the later the orogeny was in time, the more favorable it is to the condition of hydrocarbon preservation.