Abstract: Several oil pools have been found in Fuyu oil layer in Chaoyanggou oil field. Biomarker was used to analysis the oil source. In order to simulate oil migration pathway from source area to chaoyanggou oil field , detail research has been done using basin modeling software such as burial history restoration , oil generation and expulsion ,and porosity analysis of reservoir .Based on fluid potential therory ,the oil migration pathway was calculated. The result is that the oil from Chaoyangguo oil field come from Sanzhao depress , oil mirgate from Sanzhao depress southward and accumulate in the north part of Chaoyanggou terrace first , then regualte to south , and makes oil distribution today.