Abstract: Going through depression tectonic units of different conditions of reservoir and cap, trap and conducting research, explore the different tectonic units of the difference of neogene hydrocarbon accumulation conditions, summarize its main controlling factors. Research shows that oil and gas in the study area are first along for vertical migration of oil source faults, sand body lateral migration along, but have certain differences in different tectonic unit. Uplift area big LiuQuan tectonic belt and chu tectonic belt is given priority to with vertical migration of oil source faults, vertical migration distance is longer, an slope zone of slope and He Xi Wu tectonic belt vertical migration distance is shorter, fracture of oil and gas mainly ACTS as vertical adjustment. Uplift area big Liu Quan tectonic belt and chu tectonic belt is given priority to with short distance lateral migration of sand body, an slope zone of slope and He Xi Wu tectonic belt is given priority to with sand body lateral migration, lateral migration distance is longer, strata for oil and gas enrichment is relatively single, oil and gas in zonal distribution.