Abstract: The study from the sediments, structures and hydrocarbon accumulation systems in Chaoyanggou-Changchunling area (Chao-Chang area for short) shows that this area is located between two effective hydrocarbon source sags of Sanzhao and Wangfu, which are characterized by that abundant oil sources and multistage channel sands provided reservoir spaces for hydrocarbon accumulation; strata overpressure became driving force of oil and gas drainage downward; the oblique crossing of the sand and fault formed channels for hydrocarbon migration and accumulation. Also, it is recognized that there are multiple types of reservoirs in Chao-Chang area, including lithologic, structural ? lithologic and lithologic ?structural one, and many models for short ? middle ? remote distance lateral hydrocarbon migration and accumulation with source bed in recent formations and reservoir bed in ancient formations. Finally, this paper presents prediction of three favorable oil?gas bearing areas of Class?Ⅰ, Class?Ⅱ and Class?Ⅲ in this area