Abstract: The study on the hydrocarbon pathway always is the nut of petroleum geology.The newly developed ray- tracing technology which integrate hydrocarhon kitchen and energy field is much improved comparing with the flu- id potential analyze,so it is an important technique of res- ervoir location.The application of ray-tracing technique on the Damingtun depression shows that:the modeling: results tally with the distrihution of hydrocarbom high- waxy oil is widely occurrence.Jingxi structural heh is the gathering place of high-waxy oil,which is exploration prospect;the normal oil is relative narrowly occurrence, which mainly distribute in the Rongshengpu sag and its perimeter zone.